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<pre><a name="line-1"></a><span class='hs-comment'>{-|
<a name="line-2"></a>
<a name="line-3"></a>Date parsing and utilities for hledger.
<a name="line-4"></a>
<a name="line-5"></a>For date and time values, we use the standard Day and UTCTime types.
<a name="line-6"></a>
<a name="line-7"></a>A 'SmartDate' is a date which may be partially-specified or relative.
<a name="line-8"></a>Eg 2008\/12\/31, but also 2008\/12, 12\/31, tomorrow, last week, next year.
<a name="line-9"></a>We represent these as a triple of strings like (\"2008\",\"12\",\"\"),
<a name="line-10"></a>(\"\",\"\",\"tomorrow\"), (\"\",\"last\",\"week\").
<a name="line-11"></a>
<a name="line-12"></a>A 'DateSpan' is the span of time between two specific calendar dates, or
<a name="line-13"></a>an open-ended span where one or both dates are unspecified. (A date span
<a name="line-14"></a>with both ends unspecified matches all dates.)
<a name="line-15"></a>
<a name="line-16"></a>An 'Interval' is ledger's \"reporting interval\" - weekly, monthly,
<a name="line-17"></a>quarterly, etc.
<a name="line-18"></a>
<a name="line-19"></a>-}</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-comment'>-- XXX fromGregorian silently clips bad dates, use fromGregorianValid instead ?</span>
<a name="line-22"></a>
<a name="line-23"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Hledger</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Dates</span>
<a name="line-24"></a><span class='hs-keyword'>where</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Time</span><span class='hs-varop'>.</span><span class='hs-conid'>Format</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Time</span><span class='hs-varop'>.</span><span class='hs-conid'>Calendar</span><span class='hs-varop'>.</span><span class='hs-conid'>OrdinalDate</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Safe</span> <span class='hs-layout'>(</span><span class='hs-varid'>readMay</span><span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Locale</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultTimeLocale</span><span class='hs-layout'>)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>Parsec</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Hledger</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Hledger</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span>
<a name="line-33"></a>
<a name="line-34"></a>
<a name="line-35"></a><a name="showDate"></a><span class='hs-definition'>showDate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-36"></a><span class='hs-definition'>showDate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>formatTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-str'>"%C%y/%m/%d"</span>
<a name="line-37"></a>
<a name="line-38"></a><a name="getCurrentDay"></a><span class='hs-comment'>-- | Get the current local date.</span>
<a name="line-39"></a><span class='hs-definition'>getCurrentDay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Day</span>
<a name="line-40"></a><span class='hs-definition'>getCurrentDay</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-41"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getZonedTime</span>
<a name="line-42"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>localDay</span> <span class='hs-layout'>(</span><span class='hs-varid'>zonedTimeToLocalTime</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="getCurrentYear"></a><span class='hs-comment'>-- | Get the current local year.</span>
<a name="line-45"></a><span class='hs-definition'>getCurrentYear</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Integer</span>
<a name="line-46"></a><span class='hs-definition'>getCurrentYear</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-47"></a> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varop'>`fmap`</span> <span class='hs-varid'>getCurrentDay</span>
<a name="line-48"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>y</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="elapsedSeconds"></a><span class='hs-definition'>elapsedSeconds</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Fractional</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>UTCTime</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>UTCTime</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-51"></a><span class='hs-definition'>elapsedSeconds</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>realToFrac</span> <span class='hs-varop'>.</span> <span class='hs-varid'>diffUTCTime</span> <span class='hs-varid'>t1</span>
<a name="line-52"></a>
<a name="line-53"></a><a name="splitSpan"></a><span class='hs-comment'>-- | Split a DateSpan into one or more consecutive spans at the specified interval.</span>
<a name="line-54"></a><span class='hs-definition'>splitSpan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Interval</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DateSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DateSpan</span><span class='hs-keyglyph'>]</span>
<a name="line-55"></a><span class='hs-definition'>splitSpan</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-keyglyph'>]</span>
<a name="line-56"></a><span class='hs-definition'>splitSpan</span> <span class='hs-conid'>NoInterval</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>s</span><span class='hs-keyglyph'>]</span>
<a name="line-57"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Days</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>startofday</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nextday</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-58"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Weeks</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>startofweek</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nextweek</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-59"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Months</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>startofmonth</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nextmonth</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-60"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Quarters</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>startofquarter</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nextquarter</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-61"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Years</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>startofyear</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-varid'>n</span> <span class='hs-varid'>nextyear</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-62"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>DayOfMonth</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-layout'>(</span><span class='hs-varid'>nthdayofmonthcontaining</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>nextday</span> <span class='hs-varop'>.</span> <span class='hs-varid'>nextmonth</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-63"></a><span class='hs-definition'>splitSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>DayOfWeek</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-layout'>(</span><span class='hs-varid'>nthdayofweekcontaining</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>applyN</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>nextday</span> <span class='hs-varop'>.</span> <span class='hs-varid'>nextweek</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-64"></a><span class='hs-comment'>-- splitSpan (WeekOfYear n) s = splitspan startofweek (applyN n nextweek) s</span>
<a name="line-65"></a><span class='hs-comment'>-- splitSpan (MonthOfYear n) s = splitspan startofmonth (applyN n nextmonth) s</span>
<a name="line-66"></a><span class='hs-comment'>-- splitSpan (QuarterOfYear n) s = splitspan startofquarter (applyN n nextquarter) s</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="splitspan"></a><span class='hs-comment'>-- Split the given span using the provided helper functions:</span>
<a name="line-69"></a><span class='hs-comment'>-- start is applied to the span's start date to get the first sub-span's start date</span>
<a name="line-70"></a><span class='hs-comment'>-- next is applied to a sub-span's start date to get the next sub-span's start date</span>
<a name="line-71"></a><span class='hs-definition'>splitspan</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DateSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DateSpan</span><span class='hs-keyglyph'>]</span>
<a name="line-72"></a><span class='hs-definition'>splitspan</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-73"></a><span class='hs-definition'>splitspan</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>start</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>next</span> <span class='hs-varop'>$</span> <span class='hs-varid'>start</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-definition'>splitspan</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>start</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>next</span> <span class='hs-varop'>$</span> <span class='hs-varid'>start</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-75"></a><span class='hs-definition'>splitspan</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-varid'>span</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-76"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>span</span><span class='hs-keyglyph'>]</span>
<a name="line-77"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitspan'</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-varid'>span</span>
<a name="line-78"></a> <span class='hs-keyword'>where</span>
<a name="line-79"></a> <span class='hs-varid'>splitspan'</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-80"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-81"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>subs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>sube</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>splitspan'</span> <span class='hs-varid'>start</span> <span class='hs-varid'>next</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>sube</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>subs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>start</span> <span class='hs-varid'>s</span>
<a name="line-83"></a> <span class='hs-varid'>sube</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>next</span> <span class='hs-varid'>subs</span>
<a name="line-84"></a> <span class='hs-varid'>splitspan'</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error'</span> <span class='hs-str'>"won't happen, avoids warnings"</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="daysInSpan"></a><span class='hs-comment'>-- | Count the days in a DateSpan, or if it is open-ended return Nothing.</span>
<a name="line-87"></a><span class='hs-definition'>daysInSpan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DateSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Integer</span>
<a name="line-88"></a><span class='hs-definition'>daysInSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>d1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>d2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>diffDays</span> <span class='hs-varid'>d2</span> <span class='hs-varid'>d1</span>
<a name="line-89"></a><span class='hs-definition'>daysInSpan</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="spanContainsDate"></a><span class='hs-comment'>-- | Does the span include the given date ?</span>
<a name="line-92"></a><span class='hs-definition'>spanContainsDate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DateSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-93"></a><span class='hs-definition'>spanContainsDate</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-94"></a><span class='hs-definition'>spanContainsDate</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-varop'><</span> <span class='hs-varid'>e</span>
<a name="line-95"></a><span class='hs-definition'>spanContainsDate</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>b</span>
<a name="line-96"></a><span class='hs-definition'>spanContainsDate</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>b</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>d</span> <span class='hs-varop'><</span> <span class='hs-varid'>e</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="orDatesFrom"></a><span class='hs-comment'>-- | Combine two datespans, filling any unspecified dates in the first</span>
<a name="line-99"></a><span class='hs-comment'>-- with dates from the second.</span>
<a name="line-100"></a><span class='hs-definition'>orDatesFrom</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DateSpan</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-101"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>a1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>a1</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>a2</span>
<a name="line-102"></a> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>b1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>b1</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>b2</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="parsePeriodExpr"></a><span class='hs-comment'>-- | Parse a period expression to an Interval and overall DateSpan using</span>
<a name="line-105"></a><span class='hs-comment'>-- the provided reference date, or return a parse error.</span>
<a name="line-106"></a><span class='hs-definition'>parsePeriodExpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-conid'>ParseError</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interval</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span><span class='hs-layout'>)</span>
<a name="line-107"></a><span class='hs-definition'>parsePeriodExpr</span> <span class='hs-varid'>refdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parsewith</span> <span class='hs-layout'>(</span><span class='hs-varid'>periodexpr</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-108"></a>
<a name="line-109"></a><a name="dateSpanAsText"></a><span class='hs-comment'>-- | Show a DateSpan as a human-readable pseudo-period-expression string.</span>
<a name="line-110"></a><span class='hs-definition'>dateSpanAsText</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DateSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-111"></a><span class='hs-definition'>dateSpanAsText</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"all"</span>
<a name="line-112"></a><span class='hs-definition'>dateSpanAsText</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printf</span> <span class='hs-str'>"to %s"</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-113"></a><span class='hs-definition'>dateSpanAsText</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printf</span> <span class='hs-str'>"from %s"</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-114"></a><span class='hs-definition'>dateSpanAsText</span> <span class='hs-layout'>(</span><span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printf</span> <span class='hs-str'>"%s to %s"</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="spanFromSmartDateString"></a><span class='hs-comment'>-- | Convert a single smart date string to a date span using the provided</span>
<a name="line-117"></a><span class='hs-comment'>-- reference date, or raise an error.</span>
<a name="line-118"></a><span class='hs-definition'>spanFromSmartDateString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DateSpan</span>
<a name="line-119"></a><span class='hs-definition'>spanFromSmartDateString</span> <span class='hs-varid'>refdate</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>spanFromSmartDate</span> <span class='hs-varid'>refdate</span> <span class='hs-varid'>sdate</span>
<a name="line-120"></a> <span class='hs-keyword'>where</span>
<a name="line-121"></a> <span class='hs-varid'>sdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromparse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parsewith</span> <span class='hs-varid'>smartdateonly</span> <span class='hs-varid'>s</span>
<a name="line-122"></a>
<a name="line-123"></a><a name="spanFromSmartDate"></a><span class='hs-definition'>spanFromSmartDate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SmartDate</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DateSpan</span>
<a name="line-124"></a><span class='hs-definition'>spanFromSmartDate</span> <span class='hs-varid'>refdate</span> <span class='hs-varid'>sdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-125"></a> <span class='hs-keyword'>where</span>
<a name="line-126"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ry</span><span class='hs-layout'>,</span><span class='hs-varid'>rm</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>refdate</span>
<a name="line-127"></a> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span><span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>span</span> <span class='hs-varid'>sdate</span>
<a name="line-128"></a> <span class='hs-varid'>span</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SmartDate</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Day</span><span class='hs-layout'>,</span><span class='hs-conid'>Day</span><span class='hs-layout'>)</span>
<a name="line-129"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"today"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-130"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-131"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"yesterday"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-132"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-133"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"tomorrow"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>addDays</span> <span class='hs-num'>2</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>addDays</span> <span class='hs-num'>2</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-135"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevweek</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisweek</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-136"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisweek</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextweek</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-137"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextweek</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>startofweek</span> <span class='hs-varop'>$</span> <span class='hs-varid'>addDays</span> <span class='hs-num'>14</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-138"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevmonth</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>thismonth</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-139"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>thismonth</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextmonth</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-140"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextmonth</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>startofmonth</span> <span class='hs-varop'>$</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-num'>2</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevquarter</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisquarter</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisquarter</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextquarter</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-143"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextquarter</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>startofquarter</span> <span class='hs-varop'>$</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-num'>6</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-144"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>prevyear</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisyear</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-145"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisyear</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextyear</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-146"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>nextyear</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>,</span> <span class='hs-varid'>startofyear</span> <span class='hs-varop'>$</span> <span class='hs-varid'>addGregorianYearsClip</span> <span class='hs-num'>2</span> <span class='hs-varid'>refdate</span><span class='hs-layout'>)</span>
<a name="line-147"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rm</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-148"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>startofmonth</span> <span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextmonth</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span>
<a name="line-149"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-150"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>startofyear</span> <span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextyear</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span> <span class='hs-num'>1</span>
<a name="line-151"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>startofmonth</span> <span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextmonth</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span>
<a name="line-152"></a> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>day</span><span class='hs-layout'>,</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>day</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="showDay"></a><span class='hs-definition'>showDay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-155"></a><span class='hs-definition'>showDay</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printf</span> <span class='hs-str'>"%04d/%02d/%02d"</span> <span class='hs-varid'>y</span> <span class='hs-varid'>m</span> <span class='hs-varid'>d</span> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>day</span>
<a name="line-156"></a>
<a name="line-157"></a><a name="fixSmartDateStr"></a><span class='hs-comment'>-- | Convert a smart date string to an explicit yyyy\/mm\/dd string using</span>
<a name="line-158"></a><span class='hs-comment'>-- the provided reference date, or raise an error.</span>
<a name="line-159"></a><span class='hs-definition'>fixSmartDateStr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-160"></a><span class='hs-definition'>fixSmartDateStr</span> <span class='hs-varid'>t</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>either</span> <span class='hs-varid'>parseerror</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDateStrEither</span> <span class='hs-varid'>t</span> <span class='hs-varid'>s</span>
<a name="line-161"></a>
<a name="line-162"></a><a name="fixSmartDateStrEither"></a><span class='hs-comment'>-- | A safe version of fixSmartDateStr.</span>
<a name="line-163"></a><span class='hs-definition'>fixSmartDateStrEither</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-conid'>ParseError</span> <span class='hs-conid'>String</span>
<a name="line-164"></a><span class='hs-definition'>fixSmartDateStrEither</span> <span class='hs-varid'>t</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>parsewith</span> <span class='hs-varid'>smartdateonly</span> <span class='hs-layout'>(</span><span class='hs-varid'>lowercase</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-165"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>sd</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Right</span> <span class='hs-varop'>$</span> <span class='hs-varid'>showDay</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDate</span> <span class='hs-varid'>t</span> <span class='hs-varid'>sd</span>
<a name="line-166"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span>
<a name="line-167"></a>
<a name="line-168"></a><a name="fixSmartDate"></a><span class='hs-comment'>-- | Convert a SmartDate to an absolute date using the provided reference date.</span>
<a name="line-169"></a><span class='hs-definition'>fixSmartDate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SmartDate</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span>
<a name="line-170"></a><span class='hs-definition'>fixSmartDate</span> <span class='hs-varid'>refdate</span> <span class='hs-varid'>sdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fix</span> <span class='hs-varid'>sdate</span>
<a name="line-171"></a> <span class='hs-keyword'>where</span>
<a name="line-172"></a> <span class='hs-varid'>fix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SmartDate</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span>
<a name="line-173"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"today"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rm</span> <span class='hs-varid'>rd</span>
<a name="line-174"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rm</span> <span class='hs-varid'>rd</span>
<a name="line-175"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"yesterday"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevday</span> <span class='hs-varid'>refdate</span>
<a name="line-176"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevday</span> <span class='hs-varid'>refdate</span>
<a name="line-177"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"tomorrow"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span>
<a name="line-178"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"day"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextday</span> <span class='hs-varid'>refdate</span>
<a name="line-179"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevweek</span> <span class='hs-varid'>refdate</span>
<a name="line-180"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thisweek</span> <span class='hs-varid'>refdate</span>
<a name="line-181"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"week"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextweek</span> <span class='hs-varid'>refdate</span>
<a name="line-182"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevmonth</span> <span class='hs-varid'>refdate</span>
<a name="line-183"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thismonth</span> <span class='hs-varid'>refdate</span>
<a name="line-184"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"month"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextmonth</span> <span class='hs-varid'>refdate</span>
<a name="line-185"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevquarter</span> <span class='hs-varid'>refdate</span>
<a name="line-186"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thisquarter</span> <span class='hs-varid'>refdate</span>
<a name="line-187"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"quarter"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextquarter</span> <span class='hs-varid'>refdate</span>
<a name="line-188"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"last"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prevyear</span> <span class='hs-varid'>refdate</span>
<a name="line-189"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"this"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thisyear</span> <span class='hs-varid'>refdate</span>
<a name="line-190"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"next"</span><span class='hs-layout'>,</span><span class='hs-str'>"year"</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nextyear</span> <span class='hs-varid'>refdate</span>
<a name="line-191"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-varid'>rm</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-192"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span>
<a name="line-193"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>ry</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-194"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span> <span class='hs-num'>1</span>
<a name="line-195"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span>
<a name="line-196"></a> <span class='hs-varid'>fix</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-197"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ry</span><span class='hs-layout'>,</span><span class='hs-varid'>rm</span><span class='hs-layout'>,</span><span class='hs-varid'>rd</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>refdate</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="prevday"></a><span class='hs-definition'>prevday</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span>
<a name="line-200"></a><span class='hs-definition'>prevday</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-201"></a><a name="nextday"></a><span class='hs-definition'>nextday</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-num'>1</span>
<a name="line-202"></a><a name="startofday"></a><span class='hs-definition'>startofday</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-203"></a>
<a name="line-204"></a><a name="thisweek"></a><span class='hs-definition'>thisweek</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofweek</span>
<a name="line-205"></a><a name="prevweek"></a><span class='hs-definition'>prevweek</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofweek</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>7</span><span class='hs-layout'>)</span>
<a name="line-206"></a><a name="nextweek"></a><span class='hs-definition'>nextweek</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofweek</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addDays</span> <span class='hs-num'>7</span>
<a name="line-207"></a><a name="startofweek"></a><span class='hs-definition'>startofweek</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMondayStartWeek</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-num'>1</span>
<a name="line-208"></a> <span class='hs-keyword'>where</span>
<a name="line-209"></a> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>day</span>
<a name="line-210"></a> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mondayStartWeek</span> <span class='hs-varid'>day</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="thismonth"></a><span class='hs-definition'>thismonth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofmonth</span>
<a name="line-213"></a><a name="prevmonth"></a><span class='hs-definition'>prevmonth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofmonth</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-214"></a><a name="nextmonth"></a><span class='hs-definition'>nextmonth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofmonth</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-num'>1</span>
<a name="line-215"></a><a name="startofmonth"></a><span class='hs-definition'>startofmonth</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>y</span> <span class='hs-varid'>m</span> <span class='hs-num'>1</span> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>day</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="thisquarter"></a><span class='hs-definition'>thisquarter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofquarter</span>
<a name="line-218"></a><a name="prevquarter"></a><span class='hs-definition'>prevquarter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofquarter</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>3</span><span class='hs-layout'>)</span>
<a name="line-219"></a><a name="nextquarter"></a><span class='hs-definition'>nextquarter</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofquarter</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianMonthsClip</span> <span class='hs-num'>3</span>
<a name="line-220"></a><a name="startofquarter"></a><span class='hs-definition'>startofquarter</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-varid'>firstmonthofquarter</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-num'>1</span>
<a name="line-221"></a> <span class='hs-keyword'>where</span>
<a name="line-222"></a> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>day</span>
<a name="line-223"></a> <span class='hs-varid'>firstmonthofquarter</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>3</span><span class='hs-layout'>)</span> <span class='hs-varop'>*</span> <span class='hs-num'>3</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-224"></a>
<a name="line-225"></a><a name="thisyear"></a><span class='hs-definition'>thisyear</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofyear</span>
<a name="line-226"></a><a name="prevyear"></a><span class='hs-definition'>prevyear</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofyear</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianYearsClip</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-227"></a><a name="nextyear"></a><span class='hs-definition'>nextyear</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofyear</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGregorianYearsClip</span> <span class='hs-num'>1</span>
<a name="line-228"></a><a name="startofyear"></a><span class='hs-definition'>startofyear</span> <span class='hs-varid'>day</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromGregorian</span> <span class='hs-varid'>y</span> <span class='hs-num'>1</span> <span class='hs-num'>1</span> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toGregorian</span> <span class='hs-varid'>day</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="nthdayofmonthcontaining"></a><span class='hs-definition'>nthdayofmonthcontaining</span> <span class='hs-varid'>n</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>d1</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d1</span>
<a name="line-231"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d2</span>
<a name="line-232"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>d1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-233"></a> <span class='hs-varid'>d2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nextmonth</span> <span class='hs-varid'>s</span>
<a name="line-234"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofmonth</span> <span class='hs-varid'>d</span>
<a name="line-235"></a>
<a name="line-236"></a><a name="nthdayofweekcontaining"></a><span class='hs-definition'>nthdayofweekcontaining</span> <span class='hs-varid'>n</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>d1</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d1</span>
<a name="line-237"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d2</span>
<a name="line-238"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>d1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-239"></a> <span class='hs-varid'>d2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addDays</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nextweek</span> <span class='hs-varid'>s</span>
<a name="line-240"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>startofweek</span> <span class='hs-varid'>d</span>
<a name="line-241"></a>
<a name="line-242"></a><span class='hs-comment'>----------------------------------------------------------------------</span>
<a name="line-243"></a><span class='hs-comment'>-- parsing</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="firstJust"></a><span class='hs-definition'>firstJust</span> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varid'>ms</span> <span class='hs-keyword'>of</span>
<a name="line-246"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-247"></a> <span class='hs-layout'>(</span><span class='hs-varid'>md</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>md</span>
<a name="line-248"></a>
<a name="line-249"></a><a name="parsedatetimeM"></a><span class='hs-comment'>-- | Parse a couple of date-time string formats to a time type.</span>
<a name="line-250"></a><span class='hs-definition'>parsedatetimeM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>LocalTime</span>
<a name="line-251"></a><span class='hs-definition'>parsedatetimeM</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firstJust</span> <span class='hs-keyglyph'>[</span>
<a name="line-252"></a> <span class='hs-varid'>parseTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-str'>"%Y/%m/%d %H:%M:%S"</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span>
<a name="line-253"></a> <span class='hs-varid'>parseTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-str'>"%Y-%m-%d %H:%M:%S"</span> <span class='hs-varid'>s</span>
<a name="line-254"></a> <span class='hs-keyglyph'>]</span>
<a name="line-255"></a>
<a name="line-256"></a><a name="parsedateM"></a><span class='hs-comment'>-- | Parse a couple of date string formats to a time type.</span>
<a name="line-257"></a><span class='hs-definition'>parsedateM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Day</span>
<a name="line-258"></a><span class='hs-definition'>parsedateM</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firstJust</span> <span class='hs-keyglyph'>[</span>
<a name="line-259"></a> <span class='hs-varid'>parseTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-str'>"%Y/%m/%d"</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span>
<a name="line-260"></a> <span class='hs-varid'>parseTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-str'>"%Y-%m-%d"</span> <span class='hs-varid'>s</span>
<a name="line-261"></a> <span class='hs-keyglyph'>]</span>
<a name="line-262"></a>
<a name="line-263"></a><a name="parsedatetime"></a><span class='hs-comment'>-- | Parse a date-time string to a time type, or raise an error.</span>
<a name="line-264"></a><span class='hs-definition'>parsedatetime</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LocalTime</span>
<a name="line-265"></a><span class='hs-definition'>parsedatetime</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>error'</span> <span class='hs-varop'>$</span> <span class='hs-str'>"could not parse timestamp \""</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\""</span><span class='hs-layout'>)</span>
<a name="line-266"></a> <span class='hs-layout'>(</span><span class='hs-varid'>parsedatetimeM</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-267"></a>
<a name="line-268"></a><a name="parsedate"></a><span class='hs-comment'>-- | Parse a date string to a time type, or raise an error.</span>
<a name="line-269"></a><span class='hs-definition'>parsedate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Day</span>
<a name="line-270"></a><span class='hs-definition'>parsedate</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>error'</span> <span class='hs-varop'>$</span> <span class='hs-str'>"could not parse date \""</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\""</span><span class='hs-layout'>)</span>
<a name="line-271"></a> <span class='hs-layout'>(</span><span class='hs-varid'>parsedateM</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-272"></a>
<a name="line-273"></a><a name="parsetimewith"></a><span class='hs-comment'>-- | Parse a time string to a time type using the provided pattern, or</span>
<a name="line-274"></a><span class='hs-comment'>-- return the default.</span>
<a name="line-275"></a><span class='hs-definition'>parsetimewith</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ParseTime</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span>
<a name="line-276"></a><span class='hs-definition'>parsetimewith</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>s</span> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-varid'>def</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parseTime</span> <span class='hs-varid'>defaultTimeLocale</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>s</span>
<a name="line-277"></a>
<a name="line-278"></a><a name="smartdate"></a><span class='hs-comment'>{-|
<a name="line-279"></a>Parse a date in any of the formats allowed in ledger's period expressions,
<a name="line-280"></a>and maybe some others:
<a name="line-281"></a>
<a name="line-282"></a>> 2004
<a name="line-283"></a>> 2004/10
<a name="line-284"></a>> 2004/10/1
<a name="line-285"></a>> 10/1
<a name="line-286"></a>> 21
<a name="line-287"></a>> october, oct
<a name="line-288"></a>> yesterday, today, tomorrow
<a name="line-289"></a>> this/next/last week/day/month/quarter/year
<a name="line-290"></a>
<a name="line-291"></a>Returns a SmartDate, to be converted to a full date later (see fixSmartDate).
<a name="line-292"></a>Assumes any text in the parse stream has been lowercased.
<a name="line-293"></a>-}</span>
<a name="line-294"></a><span class='hs-definition'>smartdate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-295"></a><span class='hs-definition'>smartdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-296"></a> <span class='hs-comment'>-- XXX maybe obscures date errors ? see ledgerdate</span>
<a name="line-297"></a> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choice'</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>yyyymmdd</span><span class='hs-layout'>,</span> <span class='hs-varid'>ymd</span><span class='hs-layout'>,</span> <span class='hs-varid'>ym</span><span class='hs-layout'>,</span> <span class='hs-varid'>md</span><span class='hs-layout'>,</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-varid'>d</span><span class='hs-layout'>,</span> <span class='hs-varid'>month</span><span class='hs-layout'>,</span> <span class='hs-varid'>mon</span><span class='hs-layout'>,</span> <span class='hs-varid'>today</span><span class='hs-layout'>,</span> <span class='hs-varid'>yesterday</span><span class='hs-layout'>,</span> <span class='hs-varid'>tomorrow</span><span class='hs-layout'>,</span> <span class='hs-varid'>lastthisnextthing</span><span class='hs-keyglyph'>]</span>
<a name="line-298"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-299"></a>
<a name="line-300"></a><a name="smartdateonly"></a><span class='hs-comment'>-- | Like smartdate, but there must be nothing other than whitespace after the date.</span>
<a name="line-301"></a><span class='hs-definition'>smartdateonly</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-302"></a><span class='hs-definition'>smartdateonly</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-303"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-304"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-305"></a> <span class='hs-varid'>eof</span>
<a name="line-306"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>d</span>
<a name="line-307"></a>
<a name="line-308"></a><a name="datesepchars"></a><span class='hs-definition'>datesepchars</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"/-."</span>
<a name="line-309"></a><a name="datesepchar"></a><span class='hs-definition'>datesepchar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oneOf</span> <span class='hs-varid'>datesepchars</span>
<a name="line-310"></a>
<a name="line-311"></a><a name="validYear"></a><span class='hs-definition'>validYear</span><span class='hs-layout'>,</span> <span class='hs-varid'>validMonth</span><span class='hs-layout'>,</span> <span class='hs-varid'>validDay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-312"></a><span class='hs-definition'>validYear</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>s</span> <span class='hs-varop'>>=</span> <span class='hs-num'>4</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isJust</span> <span class='hs-layout'>(</span><span class='hs-varid'>readMay</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-313"></a><a name="validMonth"></a><span class='hs-definition'>validMonth</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>n</span><span class='hs-varop'>>=</span><span class='hs-num'>1</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>n</span><span class='hs-varop'><=</span><span class='hs-num'>12</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readMay</span> <span class='hs-varid'>s</span>
<a name="line-314"></a><a name="validDay"></a><span class='hs-definition'>validDay</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>n</span><span class='hs-varop'>>=</span><span class='hs-num'>1</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>n</span><span class='hs-varop'><=</span><span class='hs-num'>31</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readMay</span> <span class='hs-varid'>s</span>
<a name="line-315"></a>
<a name="line-316"></a><a name="failIfInvalidYear"></a><span class='hs-definition'>failIfInvalidYear</span><span class='hs-layout'>,</span> <span class='hs-varid'>failIfInvalidMonth</span><span class='hs-layout'>,</span> <span class='hs-varid'>failIfInvalidDay</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span>
<a name="line-317"></a><span class='hs-definition'>failIfInvalidYear</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>validYear</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"bad year number: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span>
<a name="line-318"></a><a name="failIfInvalidMonth"></a><span class='hs-definition'>failIfInvalidMonth</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>validMonth</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"bad month number: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span>
<a name="line-319"></a><a name="failIfInvalidDay"></a><span class='hs-definition'>failIfInvalidDay</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>validDay</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fail</span> <span class='hs-varop'>$</span> <span class='hs-str'>"bad day number: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span>
<a name="line-320"></a>
<a name="line-321"></a><a name="yyyymmdd"></a><span class='hs-definition'>yyyymmdd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-322"></a><span class='hs-definition'>yyyymmdd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-323"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>count</span> <span class='hs-num'>4</span> <span class='hs-varid'>digit</span>
<a name="line-324"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>count</span> <span class='hs-num'>2</span> <span class='hs-varid'>digit</span>
<a name="line-325"></a> <span class='hs-varid'>failIfInvalidMonth</span> <span class='hs-varid'>m</span>
<a name="line-326"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>count</span> <span class='hs-num'>2</span> <span class='hs-varid'>digit</span>
<a name="line-327"></a> <span class='hs-varid'>failIfInvalidDay</span> <span class='hs-varid'>d</span>
<a name="line-328"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-329"></a>
<a name="line-330"></a><a name="ymd"></a><span class='hs-definition'>ymd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-331"></a><span class='hs-definition'>ymd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-332"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-333"></a> <span class='hs-varid'>failIfInvalidYear</span> <span class='hs-varid'>y</span>
<a name="line-334"></a> <span class='hs-varid'>datesepchar</span>
<a name="line-335"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-336"></a> <span class='hs-varid'>failIfInvalidMonth</span> <span class='hs-varid'>m</span>
<a name="line-337"></a> <span class='hs-varid'>datesepchar</span>
<a name="line-338"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-339"></a> <span class='hs-varid'>failIfInvalidDay</span> <span class='hs-varid'>d</span>
<a name="line-340"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-341"></a>
<a name="line-342"></a><a name="ym"></a><span class='hs-definition'>ym</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-343"></a><span class='hs-definition'>ym</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-344"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-345"></a> <span class='hs-varid'>failIfInvalidYear</span> <span class='hs-varid'>y</span>
<a name="line-346"></a> <span class='hs-varid'>datesepchar</span>
<a name="line-347"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-348"></a> <span class='hs-varid'>failIfInvalidMonth</span> <span class='hs-varid'>m</span>
<a name="line-349"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-350"></a>
<a name="line-351"></a><a name="y"></a><span class='hs-definition'>y</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-352"></a><span class='hs-definition'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-353"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-354"></a> <span class='hs-varid'>failIfInvalidYear</span> <span class='hs-varid'>y</span>
<a name="line-355"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-356"></a>
<a name="line-357"></a><a name="d"></a><span class='hs-definition'>d</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-358"></a><span class='hs-definition'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-359"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-360"></a> <span class='hs-varid'>failIfInvalidDay</span> <span class='hs-varid'>d</span>
<a name="line-361"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-362"></a>
<a name="line-363"></a><a name="md"></a><span class='hs-definition'>md</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-364"></a><span class='hs-definition'>md</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-365"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-366"></a> <span class='hs-varid'>failIfInvalidMonth</span> <span class='hs-varid'>m</span>
<a name="line-367"></a> <span class='hs-varid'>datesepchar</span>
<a name="line-368"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-369"></a> <span class='hs-varid'>failIfInvalidDay</span> <span class='hs-varid'>d</span>
<a name="line-370"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span><span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-371"></a>
<a name="line-372"></a><a name="months"></a><span class='hs-definition'>months</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"january"</span><span class='hs-layout'>,</span><span class='hs-str'>"february"</span><span class='hs-layout'>,</span><span class='hs-str'>"march"</span><span class='hs-layout'>,</span><span class='hs-str'>"april"</span><span class='hs-layout'>,</span><span class='hs-str'>"may"</span><span class='hs-layout'>,</span><span class='hs-str'>"june"</span><span class='hs-layout'>,</span>
<a name="line-373"></a> <span class='hs-str'>"july"</span><span class='hs-layout'>,</span><span class='hs-str'>"august"</span><span class='hs-layout'>,</span><span class='hs-str'>"september"</span><span class='hs-layout'>,</span><span class='hs-str'>"october"</span><span class='hs-layout'>,</span><span class='hs-str'>"november"</span><span class='hs-layout'>,</span><span class='hs-str'>"december"</span><span class='hs-keyglyph'>]</span>
<a name="line-374"></a><a name="monthabbrevs"></a><span class='hs-definition'>monthabbrevs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"jan"</span><span class='hs-layout'>,</span><span class='hs-str'>"feb"</span><span class='hs-layout'>,</span><span class='hs-str'>"mar"</span><span class='hs-layout'>,</span><span class='hs-str'>"apr"</span><span class='hs-layout'>,</span><span class='hs-str'>"may"</span><span class='hs-layout'>,</span><span class='hs-str'>"jun"</span><span class='hs-layout'>,</span><span class='hs-str'>"jul"</span><span class='hs-layout'>,</span><span class='hs-str'>"aug"</span><span class='hs-layout'>,</span><span class='hs-str'>"sep"</span><span class='hs-layout'>,</span><span class='hs-str'>"oct"</span><span class='hs-layout'>,</span><span class='hs-str'>"nov"</span><span class='hs-layout'>,</span><span class='hs-str'>"dec"</span><span class='hs-keyglyph'>]</span>
<a name="line-375"></a><a name="weekdays"></a><span class='hs-definition'>weekdays</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"monday"</span><span class='hs-layout'>,</span><span class='hs-str'>"tuesday"</span><span class='hs-layout'>,</span><span class='hs-str'>"wednesday"</span><span class='hs-layout'>,</span><span class='hs-str'>"thursday"</span><span class='hs-layout'>,</span><span class='hs-str'>"friday"</span><span class='hs-layout'>,</span><span class='hs-str'>"saturday"</span><span class='hs-layout'>,</span><span class='hs-str'>"sunday"</span><span class='hs-keyglyph'>]</span>
<a name="line-376"></a><a name="weekdayabbrevs"></a><span class='hs-definition'>weekdayabbrevs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"mon"</span><span class='hs-layout'>,</span><span class='hs-str'>"tue"</span><span class='hs-layout'>,</span><span class='hs-str'>"wed"</span><span class='hs-layout'>,</span><span class='hs-str'>"thu"</span><span class='hs-layout'>,</span><span class='hs-str'>"fri"</span><span class='hs-layout'>,</span><span class='hs-str'>"sat"</span><span class='hs-layout'>,</span><span class='hs-str'>"sun"</span><span class='hs-keyglyph'>]</span>
<a name="line-377"></a>
<a name="line-378"></a><a name="monthIndex"></a><span class='hs-definition'>monthIndex</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lowercase</span> <span class='hs-varid'>s</span> <span class='hs-varop'>`elemIndex`</span> <span class='hs-varid'>months</span>
<a name="line-379"></a><a name="monIndex"></a><span class='hs-definition'>monIndex</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-num'>0</span> <span class='hs-layout'>(</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lowercase</span> <span class='hs-varid'>s</span> <span class='hs-varop'>`elemIndex`</span> <span class='hs-varid'>monthabbrevs</span>
<a name="line-380"></a>
<a name="line-381"></a><a name="month"></a><span class='hs-definition'>month</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-382"></a><span class='hs-definition'>month</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-383"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choice</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>try</span> <span class='hs-varop'>.</span> <span class='hs-varid'>string</span><span class='hs-layout'>)</span> <span class='hs-varid'>months</span>
<a name="line-384"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>monthIndex</span> <span class='hs-varid'>m</span>
<a name="line-385"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-386"></a>
<a name="line-387"></a><a name="mon"></a><span class='hs-definition'>mon</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-388"></a><span class='hs-definition'>mon</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-389"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choice</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>try</span> <span class='hs-varop'>.</span> <span class='hs-varid'>string</span><span class='hs-layout'>)</span> <span class='hs-varid'>monthabbrevs</span>
<a name="line-390"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>monIndex</span> <span class='hs-varid'>m</span>
<a name="line-391"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-392"></a>
<a name="line-393"></a><a name="today"></a><span class='hs-definition'>today</span><span class='hs-layout'>,</span><span class='hs-varid'>yesterday</span><span class='hs-layout'>,</span><span class='hs-varid'>tomorrow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-394"></a><span class='hs-definition'>today</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string</span> <span class='hs-str'>"today"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"today"</span><span class='hs-layout'>)</span>
<a name="line-395"></a><a name="yesterday"></a><span class='hs-definition'>yesterday</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string</span> <span class='hs-str'>"yesterday"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"yesterday"</span><span class='hs-layout'>)</span>
<a name="line-396"></a><a name="tomorrow"></a><span class='hs-definition'>tomorrow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>string</span> <span class='hs-str'>"tomorrow"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-str'>"tomorrow"</span><span class='hs-layout'>)</span>
<a name="line-397"></a>
<a name="line-398"></a><a name="lastthisnextthing"></a><span class='hs-definition'>lastthisnextthing</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>SmartDate</span>
<a name="line-399"></a><span class='hs-definition'>lastthisnextthing</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-400"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choice</span> <span class='hs-keyglyph'>[</span>
<a name="line-401"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"last"</span>
<a name="line-402"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"this"</span>
<a name="line-403"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"next"</span>
<a name="line-404"></a> <span class='hs-keyglyph'>]</span>
<a name="line-405"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span> <span class='hs-comment'>-- make the space optional for easier scripting</span>
<a name="line-406"></a> <span class='hs-varid'>p</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choice</span> <span class='hs-keyglyph'>[</span>
<a name="line-407"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"day"</span>
<a name="line-408"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"week"</span>
<a name="line-409"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"month"</span>
<a name="line-410"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"quarter"</span>
<a name="line-411"></a> <span class='hs-layout'>,</span><span class='hs-varid'>string</span> <span class='hs-str'>"year"</span>
<a name="line-412"></a> <span class='hs-keyglyph'>]</span>
<a name="line-413"></a><span class='hs-comment'>-- XXX support these in fixSmartDate</span>
<a name="line-414"></a><span class='hs-comment'>-- ++ (map string $ months ++ monthabbrevs ++ weekdays ++ weekdayabbrevs)</span>
<a name="line-415"></a>
<a name="line-416"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-str'>""</span><span class='hs-layout'>,</span><span class='hs-varid'>r</span><span class='hs-layout'>,</span><span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-417"></a>
<a name="line-418"></a><a name="periodexpr"></a><span class='hs-definition'>periodexpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interval</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span><span class='hs-layout'>)</span>
<a name="line-419"></a><span class='hs-definition'>periodexpr</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>try</span> <span class='hs-keyglyph'>[</span>
<a name="line-420"></a> <span class='hs-varid'>intervalanddateperiodexpr</span> <span class='hs-varid'>rdate</span><span class='hs-layout'>,</span>
<a name="line-421"></a> <span class='hs-varid'>intervalperiodexpr</span><span class='hs-layout'>,</span>
<a name="line-422"></a> <span class='hs-varid'>dateperiodexpr</span> <span class='hs-varid'>rdate</span><span class='hs-layout'>,</span>
<a name="line-423"></a> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>NoInterval</span><span class='hs-layout'>,</span><span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-424"></a> <span class='hs-keyglyph'>]</span>
<a name="line-425"></a>
<a name="line-426"></a><a name="intervalanddateperiodexpr"></a><span class='hs-definition'>intervalanddateperiodexpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interval</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span><span class='hs-layout'>)</span>
<a name="line-427"></a><span class='hs-definition'>intervalanddateperiodexpr</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-428"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-429"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reportinginterval</span>
<a name="line-430"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-431"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>periodexprdatespan</span> <span class='hs-varid'>rdate</span>
<a name="line-432"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-433"></a>
<a name="line-434"></a><a name="intervalperiodexpr"></a><span class='hs-definition'>intervalperiodexpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interval</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span><span class='hs-layout'>)</span>
<a name="line-435"></a><span class='hs-definition'>intervalperiodexpr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-436"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-437"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reportinginterval</span>
<a name="line-438"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-439"></a>
<a name="line-440"></a><a name="dateperiodexpr"></a><span class='hs-definition'>dateperiodexpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interval</span><span class='hs-layout'>,</span> <span class='hs-conid'>DateSpan</span><span class='hs-layout'>)</span>
<a name="line-441"></a><span class='hs-definition'>dateperiodexpr</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-442"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-443"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>periodexprdatespan</span> <span class='hs-varid'>rdate</span>
<a name="line-444"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>NoInterval</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-445"></a>
<a name="line-446"></a><a name="reportinginterval"></a><span class='hs-comment'>-- Parse a reporting interval.</span>
<a name="line-447"></a><span class='hs-definition'>reportinginterval</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Interval</span>
<a name="line-448"></a><span class='hs-definition'>reportinginterval</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice'</span> <span class='hs-keyglyph'>[</span>
<a name="line-449"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-str'>"day"</span> <span class='hs-str'>"daily"</span> <span class='hs-conid'>Days</span><span class='hs-layout'>,</span>
<a name="line-450"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-str'>"week"</span> <span class='hs-str'>"weekly"</span> <span class='hs-conid'>Weeks</span><span class='hs-layout'>,</span>
<a name="line-451"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-str'>"month"</span> <span class='hs-str'>"monthly"</span> <span class='hs-conid'>Months</span><span class='hs-layout'>,</span>
<a name="line-452"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-str'>"quarter"</span> <span class='hs-str'>"quarterly"</span> <span class='hs-conid'>Quarters</span><span class='hs-layout'>,</span>
<a name="line-453"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-str'>"year"</span> <span class='hs-str'>"yearly"</span> <span class='hs-conid'>Years</span><span class='hs-layout'>,</span>
<a name="line-454"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"biweekly"</span>
<a name="line-455"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Weeks</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span>
<a name="line-456"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"bimonthly"</span>
<a name="line-457"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Months</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span>
<a name="line-458"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"every"</span>
<a name="line-459"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-460"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>read</span> <span class='hs-varop'>$</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-461"></a> <span class='hs-varid'>thsuffix</span>
<a name="line-462"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-463"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"day"</span>
<a name="line-464"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-465"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"of"</span>
<a name="line-466"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-467"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"week"</span>
<a name="line-468"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DayOfWeek</span> <span class='hs-varid'>n</span><span class='hs-layout'>,</span>
<a name="line-469"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"every"</span>
<a name="line-470"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-471"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>read</span> <span class='hs-varop'>$</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-472"></a> <span class='hs-varid'>thsuffix</span>
<a name="line-473"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-474"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"day"</span>
<a name="line-475"></a> <span class='hs-varid'>optional</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-476"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-477"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"of"</span>
<a name="line-478"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-479"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"month"</span>
<a name="line-480"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DayOfMonth</span> <span class='hs-varid'>n</span>
<a name="line-481"></a> <span class='hs-keyglyph'>]</span>
<a name="line-482"></a> <span class='hs-keyword'>where</span>
<a name="line-483"></a>
<a name="line-484"></a> <span class='hs-varid'>thsuffix</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>string</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"st"</span><span class='hs-layout'>,</span><span class='hs-str'>"nd"</span><span class='hs-layout'>,</span><span class='hs-str'>"rd"</span><span class='hs-layout'>,</span><span class='hs-str'>"th"</span><span class='hs-keyglyph'>]</span>
<a name="line-485"></a>
<a name="line-486"></a> <span class='hs-comment'>-- Parse any of several variants of a basic interval, eg "daily", "every day", "every N days".</span>
<a name="line-487"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Interval</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>Interval</span>
<a name="line-488"></a> <span class='hs-varid'>tryinterval</span> <span class='hs-varid'>singular</span> <span class='hs-varid'>compact</span> <span class='hs-varid'>intcons</span> <span class='hs-keyglyph'>=</span>
<a name="line-489"></a> <span class='hs-varid'>choice'</span> <span class='hs-keyglyph'>[</span>
<a name="line-490"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-varid'>compact</span>
<a name="line-491"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intcons</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span>
<a name="line-492"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"every"</span>
<a name="line-493"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-494"></a> <span class='hs-varid'>string</span> <span class='hs-varid'>singular</span>
<a name="line-495"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intcons</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span>
<a name="line-496"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-str'>"every"</span>
<a name="line-497"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-498"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>read</span> <span class='hs-varop'>$</span> <span class='hs-varid'>many1</span> <span class='hs-varid'>digit</span>
<a name="line-499"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-500"></a> <span class='hs-varid'>string</span> <span class='hs-varid'>plural</span>
<a name="line-501"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intcons</span> <span class='hs-varid'>n</span>
<a name="line-502"></a> <span class='hs-keyglyph'>]</span>
<a name="line-503"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>plural</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>singular</span> <span class='hs-varop'>++</span> <span class='hs-str'>"s"</span>
<a name="line-504"></a>
<a name="line-505"></a><a name="periodexprdatespan"></a><span class='hs-definition'>periodexprdatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>DateSpan</span>
<a name="line-506"></a><span class='hs-definition'>periodexprdatespan</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>try</span> <span class='hs-keyglyph'>[</span>
<a name="line-507"></a> <span class='hs-varid'>doubledatespan</span> <span class='hs-varid'>rdate</span><span class='hs-layout'>,</span>
<a name="line-508"></a> <span class='hs-varid'>fromdatespan</span> <span class='hs-varid'>rdate</span><span class='hs-layout'>,</span>
<a name="line-509"></a> <span class='hs-varid'>todatespan</span> <span class='hs-varid'>rdate</span><span class='hs-layout'>,</span>
<a name="line-510"></a> <span class='hs-varid'>justdatespan</span> <span class='hs-varid'>rdate</span>
<a name="line-511"></a> <span class='hs-keyglyph'>]</span>
<a name="line-512"></a>
<a name="line-513"></a><a name="doubledatespan"></a><span class='hs-definition'>doubledatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>DateSpan</span>
<a name="line-514"></a><span class='hs-definition'>doubledatespan</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-515"></a> <span class='hs-varid'>optional</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"from"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span><span class='hs-layout'>)</span>
<a name="line-516"></a> <span class='hs-varid'>b</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-517"></a> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-518"></a> <span class='hs-varid'>optional</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"to"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span><span class='hs-layout'>)</span>
<a name="line-519"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-520"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDate</span> <span class='hs-varid'>rdate</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDate</span> <span class='hs-varid'>rdate</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-521"></a>
<a name="line-522"></a><a name="fromdatespan"></a><span class='hs-definition'>fromdatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>DateSpan</span>
<a name="line-523"></a><span class='hs-definition'>fromdatespan</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-524"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"from"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-525"></a> <span class='hs-varid'>b</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-526"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDate</span> <span class='hs-varid'>rdate</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span>
<a name="line-527"></a>
<a name="line-528"></a><a name="todatespan"></a><span class='hs-definition'>todatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>DateSpan</span>
<a name="line-529"></a><span class='hs-definition'>todatespan</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-530"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"to"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span>
<a name="line-531"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-532"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>fixSmartDate</span> <span class='hs-varid'>rdate</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-533"></a>
<a name="line-534"></a><a name="justdatespan"></a><span class='hs-definition'>justdatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Day</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>DateSpan</span>
<a name="line-535"></a><span class='hs-definition'>justdatespan</span> <span class='hs-varid'>rdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-536"></a> <span class='hs-varid'>optional</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"in"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>many</span> <span class='hs-varid'>spacenonewline</span><span class='hs-layout'>)</span>
<a name="line-537"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>smartdate</span>
<a name="line-538"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>spanFromSmartDate</span> <span class='hs-varid'>rdate</span> <span class='hs-varid'>d</span>
<a name="line-539"></a>
<a name="line-540"></a><a name="mkdatespan"></a><span class='hs-definition'>mkdatespan</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DateSpan</span>
<a name="line-541"></a><span class='hs-definition'>mkdatespan</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DateSpan</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parsedate</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>parsedate</span>
<a name="line-542"></a>
<a name="line-543"></a><a name="nulldatespan"></a><span class='hs-definition'>nulldatespan</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DateSpan</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span>
<a name="line-544"></a>
<a name="line-545"></a><a name="nulldate"></a><span class='hs-definition'>nulldate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parsedate</span> <span class='hs-str'>"1900/01/01"</span>
<a name="line-546"></a>
<a name="line-547"></a><a name="tests_Hledger_Data_Dates"></a><span class='hs-definition'>tests_Hledger_Data_Dates</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TestList</span>
<a name="line-548"></a> <span class='hs-keyglyph'>[</span>
<a name="line-549"></a>
<a name="line-550"></a> <span class='hs-str'>"parsedate"</span> <span class='hs-varop'>~:</span> <span class='hs-keyword'>do</span>
<a name="line-551"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>date1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parsedate</span> <span class='hs-str'>"2008/11/26"</span>
<a name="line-552"></a> <span class='hs-varid'>parsedate</span> <span class='hs-str'>"2008/02/03"</span> <span class='hs-varop'>`is`</span> <span class='hs-varid'>parsetimewith</span> <span class='hs-str'>"%Y/%m/%d"</span> <span class='hs-str'>"2008/02/03"</span> <span class='hs-varid'>date1</span>
<a name="line-553"></a> <span class='hs-varid'>parsedate</span> <span class='hs-str'>"2008-02-03"</span> <span class='hs-varop'>`is`</span> <span class='hs-varid'>parsetimewith</span> <span class='hs-str'>"%Y/%m/%d"</span> <span class='hs-str'>"2008/02/03"</span> <span class='hs-varid'>date1</span>
<a name="line-554"></a>
<a name="line-555"></a> <span class='hs-layout'>,</span><span class='hs-str'>"period expressions"</span> <span class='hs-varop'>~:</span> <span class='hs-keyword'>do</span>
<a name="line-556"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>todaysdate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parsedate</span> <span class='hs-str'>"2008/11/26"</span>
<a name="line-557"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>str</span> <span class='hs-varop'>`gives`</span> <span class='hs-varid'>result</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>parsewith</span> <span class='hs-layout'>(</span><span class='hs-varid'>periodexpr</span> <span class='hs-varid'>todaysdate</span><span class='hs-layout'>)</span> <span class='hs-varid'>str</span><span class='hs-layout'>)</span> <span class='hs-varop'>`is`</span> <span class='hs-layout'>(</span><span class='hs-str'>"Right "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>result</span><span class='hs-layout'>)</span>
<a name="line-558"></a> <span class='hs-str'>"from aug to oct"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"(NoInterval,DateSpan (Just 2008-08-01) (Just 2008-10-01))"</span>
<a name="line-559"></a> <span class='hs-str'>"aug to oct"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"(NoInterval,DateSpan (Just 2008-08-01) (Just 2008-10-01))"</span>
<a name="line-560"></a> <span class='hs-str'>"every 3 days in aug"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"(Days 3,DateSpan (Just 2008-08-01) (Just 2008-09-01))"</span>
<a name="line-561"></a> <span class='hs-str'>"daily from aug"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"(Days 1,DateSpan (Just 2008-08-01) Nothing)"</span>
<a name="line-562"></a> <span class='hs-str'>"every week to 2009"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"(Weeks 1,DateSpan Nothing (Just 2009-01-01))"</span>
<a name="line-563"></a>
<a name="line-564"></a> <span class='hs-layout'>,</span><span class='hs-str'>"splitSpan"</span> <span class='hs-varop'>~:</span> <span class='hs-keyword'>do</span>
<a name="line-565"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>gives</span> <span class='hs-layout'>(</span><span class='hs-varid'>interval</span><span class='hs-layout'>,</span> <span class='hs-varid'>span</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>splitSpan</span> <span class='hs-varid'>interval</span> <span class='hs-varid'>span</span> <span class='hs-varop'>`is`</span><span class='hs-layout'>)</span>
<a name="line-566"></a> <span class='hs-layout'>(</span><span class='hs-conid'>NoInterval</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2009/01/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-567"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2009/01/01"</span><span class='hs-keyglyph'>]</span>
<a name="line-568"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Quarters</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2009/01/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-569"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/04/01"</span>
<a name="line-570"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/04/01"</span> <span class='hs-str'>"2008/07/01"</span>
<a name="line-571"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/07/01"</span> <span class='hs-str'>"2008/10/01"</span>
<a name="line-572"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/10/01"</span> <span class='hs-str'>"2009/01/01"</span>
<a name="line-573"></a> <span class='hs-keyglyph'>]</span>
<a name="line-574"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Quarters</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>nulldatespan</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-575"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>nulldatespan</span><span class='hs-keyglyph'>]</span>
<a name="line-576"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Days</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-577"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/01"</span><span class='hs-keyglyph'>]</span>
<a name="line-578"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Quarters</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-579"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/01"</span><span class='hs-keyglyph'>]</span>
<a name="line-580"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Months</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/04/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-581"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/02/01"</span>
<a name="line-582"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/02/01"</span> <span class='hs-str'>"2008/03/01"</span>
<a name="line-583"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/03/01"</span> <span class='hs-str'>"2008/04/01"</span>
<a name="line-584"></a> <span class='hs-keyglyph'>]</span>
<a name="line-585"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Months</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/04/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-586"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/03/01"</span>
<a name="line-587"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/03/01"</span> <span class='hs-str'>"2008/05/01"</span>
<a name="line-588"></a> <span class='hs-keyglyph'>]</span>
<a name="line-589"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Weeks</span> <span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/15"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-590"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2007/12/31"</span> <span class='hs-str'>"2008/01/07"</span>
<a name="line-591"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/07"</span> <span class='hs-str'>"2008/01/14"</span>
<a name="line-592"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/14"</span> <span class='hs-str'>"2008/01/21"</span>
<a name="line-593"></a> <span class='hs-keyglyph'>]</span>
<a name="line-594"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Weeks</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/01/15"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-595"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2007/12/31"</span> <span class='hs-str'>"2008/01/14"</span>
<a name="line-596"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/14"</span> <span class='hs-str'>"2008/01/28"</span>
<a name="line-597"></a> <span class='hs-keyglyph'>]</span>
<a name="line-598"></a> <span class='hs-layout'>(</span><span class='hs-conid'>DayOfMonth</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/01"</span> <span class='hs-str'>"2008/04/01"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-599"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/01/02"</span> <span class='hs-str'>"2008/02/02"</span>
<a name="line-600"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/02/02"</span> <span class='hs-str'>"2008/03/02"</span>
<a name="line-601"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2008/03/02"</span> <span class='hs-str'>"2008/04/02"</span>
<a name="line-602"></a> <span class='hs-keyglyph'>]</span>
<a name="line-603"></a> <span class='hs-layout'>(</span><span class='hs-conid'>DayOfWeek</span> <span class='hs-num'>2</span><span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2011/01/01"</span> <span class='hs-str'>"2011/01/15"</span><span class='hs-layout'>)</span> <span class='hs-varop'>`gives`</span>
<a name="line-604"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2011/01/04"</span> <span class='hs-str'>"2011/01/11"</span>
<a name="line-605"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mkdatespan</span> <span class='hs-str'>"2011/01/11"</span> <span class='hs-str'>"2011/01/18"</span>
<a name="line-606"></a> <span class='hs-keyglyph'>]</span>
<a name="line-607"></a>
<a name="line-608"></a> <span class='hs-layout'>,</span><span class='hs-str'>"fixSmartDateStr"</span> <span class='hs-varop'>~:</span> <span class='hs-keyword'>do</span>
<a name="line-609"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>gives</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>is</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fixSmartDateStr</span> <span class='hs-layout'>(</span><span class='hs-varid'>parsedate</span> <span class='hs-str'>"2008/11/26"</span><span class='hs-layout'>)</span>
<a name="line-610"></a> <span class='hs-str'>"1999-12-02"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"1999/12/02"</span>
<a name="line-611"></a> <span class='hs-str'>"1999.12.02"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"1999/12/02"</span>
<a name="line-612"></a> <span class='hs-str'>"1999/3/2"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"1999/03/02"</span>
<a name="line-613"></a> <span class='hs-str'>"19990302"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"1999/03/02"</span>
<a name="line-614"></a> <span class='hs-str'>"2008/2"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/02/01"</span>
<a name="line-615"></a> <span class='hs-str'>"0020/2"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"0020/02/01"</span>
<a name="line-616"></a> <span class='hs-str'>"1000"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"1000/01/01"</span>
<a name="line-617"></a> <span class='hs-str'>"4/2"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/04/02"</span>
<a name="line-618"></a> <span class='hs-str'>"2"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/02"</span>
<a name="line-619"></a> <span class='hs-str'>"January"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/01/01"</span>
<a name="line-620"></a> <span class='hs-str'>"feb"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/02/01"</span>
<a name="line-621"></a> <span class='hs-str'>"today"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/26"</span>
<a name="line-622"></a> <span class='hs-str'>"yesterday"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/25"</span>
<a name="line-623"></a> <span class='hs-str'>"tomorrow"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/27"</span>
<a name="line-624"></a> <span class='hs-str'>"this day"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/26"</span>
<a name="line-625"></a> <span class='hs-str'>"last day"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/25"</span>
<a name="line-626"></a> <span class='hs-str'>"next day"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/27"</span>
<a name="line-627"></a> <span class='hs-str'>"this week"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/24"</span> <span class='hs-comment'>-- last monday</span>
<a name="line-628"></a> <span class='hs-str'>"last week"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/17"</span> <span class='hs-comment'>-- previous monday</span>
<a name="line-629"></a> <span class='hs-str'>"next week"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/12/01"</span> <span class='hs-comment'>-- next monday</span>
<a name="line-630"></a> <span class='hs-str'>"this month"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/11/01"</span>
<a name="line-631"></a> <span class='hs-str'>"last month"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/10/01"</span>
<a name="line-632"></a> <span class='hs-str'>"next month"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/12/01"</span>
<a name="line-633"></a> <span class='hs-str'>"this quarter"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/10/01"</span>
<a name="line-634"></a> <span class='hs-str'>"last quarter"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/07/01"</span>
<a name="line-635"></a> <span class='hs-str'>"next quarter"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2009/01/01"</span>
<a name="line-636"></a> <span class='hs-str'>"this year"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2008/01/01"</span>
<a name="line-637"></a> <span class='hs-str'>"last year"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2007/01/01"</span>
<a name="line-638"></a> <span class='hs-str'>"next year"</span> <span class='hs-varop'>`gives`</span> <span class='hs-str'>"2009/01/01"</span>
<a name="line-639"></a><span class='hs-comment'>-- "last wed" `gives` "2008/11/19"</span>
<a name="line-640"></a><span class='hs-comment'>-- "next friday" `gives` "2008/11/28"</span>
<a name="line-641"></a><span class='hs-comment'>-- "next january" `gives` "2009/01/01"</span>
<a name="line-642"></a>
<a name="line-643"></a> <span class='hs-keyglyph'>]</span>
</pre></body>
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