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<title>src/full/Agda/Utils/Pretty.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-| Pretty printing functions.
<a name="line-2"></a>-}</span>
<a name="line-3"></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'>Pretty</span>
<a name="line-4"></a> <span class='hs-layout'>(</span> <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'>Pretty</span>
<a name="line-5"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>PrettyPrint</span>
<a name="line-6"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-7"></a>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>PrettyPrint</span>
<a name="line-9"></a>
<a name="line-10"></a><a name="Pretty"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Pretty</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-11"></a> <span class='hs-varid'>pretty</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span>
<a name="line-12"></a> <span class='hs-varid'>prettyPrec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span>
<a name="line-13"></a>
<a name="line-14"></a> <span class='hs-varid'>pretty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prettyPrec</span> <span class='hs-num'>0</span>
<a name="line-15"></a> <span class='hs-varid'>prettyPrec</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-varid'>pretty</span>
<a name="line-16"></a>
<a name="line-17"></a><a name="instance%20Pretty%20Doc"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Pretty</span> <span class='hs-conid'>Doc</span> <span class='hs-keyword'>where</span>
<a name="line-18"></a> <span class='hs-varid'>pretty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-19"></a>
<a name="line-20"></a><a name="pwords"></a><span class='hs-definition'>pwords</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Doc</span><span class='hs-keyglyph'>]</span>
<a name="line-21"></a><span class='hs-definition'>pwords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>text</span> <span class='hs-varop'>.</span> <span class='hs-varid'>words</span>
<a name="line-22"></a>
<a name="line-23"></a><a name="fwords"></a><span class='hs-definition'>fwords</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span>
<a name="line-24"></a><span class='hs-definition'>fwords</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fsep</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pwords</span>
<a name="line-25"></a>
<a name="line-26"></a><a name="mparens"></a><span class='hs-definition'>mparens</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span>
<a name="line-27"></a><span class='hs-definition'>mparens</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parens</span>
<a name="line-28"></a><span class='hs-definition'>mparens</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-comment'>-- | @align max rows@ lays out the elements of @rows@ in two columns,</span>
<a name="line-31"></a><span class='hs-comment'>-- with the second components aligned. The alignment column of the</span>
<a name="line-32"></a><span class='hs-comment'>-- second components is at most @max@ characters to the right of the</span>
<a name="line-33"></a><span class='hs-comment'>-- left-most column.</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- Precondition: @max > 0@.</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="align"></a><span class='hs-definition'>align</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></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'>Doc</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Doc</span>
<a name="line-38"></a><span class='hs-definition'>align</span> <span class='hs-varid'>max</span> <span class='hs-varid'>rows</span> <span class='hs-keyglyph'>=</span>
<a name="line-39"></a> <span class='hs-varid'>vcat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</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-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>text</span> <span class='hs-varid'>s</span> <span class='hs-varop'>$$</span> <span class='hs-varid'>nest</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxLen</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rows</span>
<a name="line-40"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>maxLen</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maximum</span> <span class='hs-varop'>$</span> <span class='hs-num'>0</span> <span class='hs-conop'>:</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varop'><</span> <span class='hs-varid'>max</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span> <span class='hs-varid'>rows</span><span class='hs-layout'>)</span>
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