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<title>src/full/Agda/Utils/Suffix.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, PatternGuards #-}</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Suffix</span> <span class='hs-keyword'>where</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-cpp'>#include "../undefined.h"</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Impossible</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-10"></a><span class='hs-comment'>-- Subscript digits</span>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-comment'>-- | Is the character one of the subscripts @'₀'@-@'₉'@?</span>
<a name="line-13"></a>
<a name="line-14"></a><a name="isSubscriptDigit"></a><span class='hs-definition'>isSubscriptDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-15"></a><span class='hs-definition'>isSubscriptDigit</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'₀'</span> <span class='hs-varop'><=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>c</span> <span class='hs-varop'><=</span> <span class='hs-chr'>'₉'</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-comment'>-- | Converts @'0'@-@'9'@ to @'₀'@-@'₉'@.</span>
<a name="line-18"></a><span class='hs-comment'>--</span>
<a name="line-19"></a><span class='hs-comment'>-- Precondition: The digit needs to be in range.</span>
<a name="line-20"></a>
<a name="line-21"></a><a name="toSubscriptDigit"></a><span class='hs-definition'>toSubscriptDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-22"></a><span class='hs-definition'>toSubscriptDigit</span> <span class='hs-varid'>d</span>
<a name="line-23"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromEnum</span> <span class='hs-chr'>'₀'</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromEnum</span> <span class='hs-varid'>d</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fromEnum</span> <span class='hs-chr'>'0'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-24"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-comment'>-- | Converts @'₀'@-@'₉'@ to @'0'@-@'9'@.</span>
<a name="line-27"></a><span class='hs-comment'>--</span>
<a name="line-28"></a><span class='hs-comment'>-- Precondition: The digit needs to be in range.</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="fromSubscriptDigit"></a><span class='hs-definition'>fromSubscriptDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span>
<a name="line-31"></a><span class='hs-definition'>fromSubscriptDigit</span> <span class='hs-varid'>d</span>
<a name="line-32"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isSubscriptDigit</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span>
<a name="line-33"></a> <span class='hs-varid'>toEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromEnum</span> <span class='hs-chr'>'0'</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromEnum</span> <span class='hs-varid'>d</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fromEnum</span> <span class='hs-chr'>'₀'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-34"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-37"></a><span class='hs-comment'>-- Suffices</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="Suffix"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Suffix</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoSuffix</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Prime</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Index</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Subscript</span> <span class='hs-conid'>Int</span>
<a name="line-40"></a>
<a name="line-41"></a><a name="nextSuffix"></a><span class='hs-definition'>nextSuffix</span> <span class='hs-conid'>NoSuffix</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Subscript</span> <span class='hs-num'>1</span>
<a name="line-42"></a><span class='hs-definition'>nextSuffix</span> <span class='hs-layout'>(</span><span class='hs-conid'>Prime</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Prime</span> <span class='hs-varop'>$</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-43"></a><span class='hs-definition'>nextSuffix</span> <span class='hs-layout'>(</span><span class='hs-conid'>Index</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Index</span> <span class='hs-varop'>$</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-44"></a><span class='hs-definition'>nextSuffix</span> <span class='hs-layout'>(</span><span class='hs-conid'>Subscript</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Subscript</span> <span class='hs-varop'>$</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="suffixView"></a><span class='hs-definition'>suffixView</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>Suffix</span><span class='hs-layout'>)</span>
<a name="line-47"></a><span class='hs-definition'>suffixView</span> <span class='hs-varid'>s</span>
<a name="line-48"></a> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>ps</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-chr'>'\''</span><span class='hs-layout'>)</span> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Prime</span> <span class='hs-varop'>$</span> <span class='hs-varid'>length</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span>
<a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>ns</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>s'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Index</span> <span class='hs-varop'>$</span> <span class='hs-varid'>read</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>ns</span><span class='hs-layout'>)</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>ns</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>span</span> <span class='hs-varid'>isSubscriptDigit</span> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>s'</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-conid'>Subscript</span> <span class='hs-varop'>$</span> <span class='hs-varid'>read</span> <span class='hs-varop'>$</span>
<a name="line-52"></a> <span class='hs-varid'>map</span> <span class='hs-varid'>fromSubscriptDigit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>ns</span><span class='hs-layout'>)</span>
<a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-conid'>NoSuffix</span><span class='hs-layout'>)</span>
<a name="line-54"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>s</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="addSuffix"></a><span class='hs-definition'>addSuffix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Suffix</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-57"></a><span class='hs-definition'>addSuffix</span> <span class='hs-varid'>s</span> <span class='hs-conid'>NoSuffix</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-58"></a><span class='hs-definition'>addSuffix</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Prime</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>replicate</span> <span class='hs-varid'>n</span> <span class='hs-chr'>'\''</span>
<a name="line-59"></a><span class='hs-definition'>addSuffix</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Index</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>i</span>
<a name="line-60"></a><span class='hs-definition'>addSuffix</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Subscript</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toSubscriptDigit</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
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