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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances #-}</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ranges</span>
<a name="line-3"></a><span class='hs-layout'>(</span><span class='hs-varid'>range</span><span class='hs-layout'>,</span> <span class='hs-varid'>ranges</span><span class='hs-layout'>,</span> <span class='hs-conid'>Range</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ranges</span><span class='hs-layout'>,</span> <span class='hs-varid'>inRange</span><span class='hs-layout'>,</span> <span class='hs-varid'>inRanges</span><span class='hs-layout'>,</span> <span class='hs-varid'>toSet</span><span class='hs-layout'>,</span> <span class='hs-varid'>single</span><span class='hs-layout'>,</span> <span class='hs-varid'>addRange</span><span class='hs-layout'>)</span>
<a name="line-4"></a><span class='hs-keyword'>where</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-layout'>(</span><span class='hs-conid'>Set</span><span class='hs-layout'>)</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Set</span>
<a name="line-8"></a>
<a name="line-9"></a><a name="Range"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varop'>!</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Range</span> <span class='hs-varop'>!</span><span class='hs-varid'>a</span> <span class='hs-varop'>!</span><span class='hs-varid'>a</span>
<a name="line-10"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-11"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"("</span><span class='hs-layout'>,</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-str'>")"</span><span class='hs-keyglyph'>]</span>
<a name="line-12"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"("</span><span class='hs-layout'>,</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</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'>y</span><span class='hs-layout'>,</span> <span class='hs-str'>")"</span><span class='hs-keyglyph'>]</span>
<a name="line-13"></a>
<a name="line-14"></a><a name="Ranges"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ranges</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-comment'>-- | A rather hacked-up instance.</span>
<a name="line-17"></a><span class='hs-comment'>-- This is to support fast lookups using 'Data.Set' (see 'toSet').</span>
<a name="line-18"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-19"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span>
<a name="line-20"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>a</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-21"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>a</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-22"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>lx</span> <span class='hs-varid'>ux</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>ly</span> <span class='hs-varid'>uy</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>lx</span> <span class='hs-varop'><=</span> <span class='hs-varid'>uy</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>ux</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>ly</span><span class='hs-layout'>)</span> <span class='hs-varop'>||</span> <span class='hs-layout'>(</span><span class='hs-varid'>ly</span> <span class='hs-varop'><=</span> <span class='hs-varid'>ux</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>uy</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>lx</span><span class='hs-layout'>)</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ord</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-25"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'><=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-26"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'><=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-27"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'><=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-28"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'><=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'><=</span> <span class='hs-varid'>y</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="single"></a><span class='hs-comment'>-- | A range consisting of a single value.</span>
<a name="line-31"></a><span class='hs-definition'>single</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span>
<a name="line-32"></a><span class='hs-definition'>single</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>x</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="range"></a><span class='hs-comment'>-- | Construct a 'Range' from a lower and upper bound.</span>
<a name="line-35"></a><span class='hs-definition'>range</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span>
<a name="line-36"></a><span class='hs-definition'>range</span> <span class='hs-varid'>l</span> <span class='hs-varid'>u</span>
<a name="line-37"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>l</span> <span class='hs-varop'><=</span> <span class='hs-varid'>u</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Range</span> <span class='hs-varid'>l</span> <span class='hs-varid'>u</span>
<a name="line-38"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"lower bound must be smaller than upper bound"</span>
<a name="line-39"></a>
<a name="line-40"></a><a name="ranges"></a><span class='hs-comment'>-- | Construct a 'Ranges' from a list of lower and upper bounds.</span>
<a name="line-41"></a><span class='hs-definition'>ranges</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span>
<a name="line-42"></a><span class='hs-definition'>ranges</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ranges</span> <span class='hs-varop'>.</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-varid'>mergeRanges</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="inRange"></a><span class='hs-comment'>-- | Tests if a given range contains a particular value.</span>
<a name="line-45"></a><span class='hs-definition'>inRange</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-46"></a><span class='hs-definition'>inRange</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="inRanges"></a><span class='hs-comment'>-- | Tests if any of the ranges contains a particular value.</span>
<a name="line-49"></a><span class='hs-definition'>inRanges</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-50"></a><span class='hs-definition'>inRanges</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ranges</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>or</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varop'>`inRange`</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>xs</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="mergeRange"></a><span class='hs-definition'>mergeRange</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Either</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-53"></a><span class='hs-definition'>mergeRange</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span>
<a name="line-54"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span>
<a name="line-55"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Right</span> <span class='hs-varop'>$</span> <span class='hs-varid'>minMax</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-56"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Left</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="minMax"></a><span class='hs-definition'>minMax</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span>
<a name="line-59"></a><span class='hs-definition'>minMax</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>lx</span> <span class='hs-varid'>ux</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>ly</span> <span class='hs-varid'>uy</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Range</span> <span class='hs-layout'>(</span><span class='hs-varid'>min</span> <span class='hs-varid'>lx</span> <span class='hs-varid'>ly</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-varid'>ux</span> <span class='hs-varid'>uy</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-definition'>minMax</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>y</span>
<a name="line-61"></a><span class='hs-definition'>minMax</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="toSet"></a><span class='hs-comment'>-- | Allows quick lookups using ranges.</span>
<a name="line-64"></a><span class='hs-definition'>toSet</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Set</span> <span class='hs-layout'>(</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-65"></a><span class='hs-definition'>toSet</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ranges</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span> <span class='hs-varid'>x</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="addRange"></a><span class='hs-definition'>addRange</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ranges</span> <span class='hs-varid'>a</span>
<a name="line-68"></a><span class='hs-definition'>addRange</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ranges</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Ranges</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeRanges</span> <span class='hs-varid'>x</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="mergeRanges"></a><span class='hs-definition'>mergeRanges</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Range</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-71"></a><span class='hs-definition'>mergeRanges</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span>
<a name="line-72"></a><span class='hs-definition'>mergeRanges</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mergeRange</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyword'>of</span>
<a name="line-73"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mergeRanges</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>z</span>
<a name="line-74"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-layout'>(</span><span class='hs-varid'>mergeRanges</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
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