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<title>src/Text/XML/HaXml/Xtract/Combinators.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- | This is a new set of XML combinators for Xtract, not standard,</span>
<a name="line-2"></a><span class='hs-comment'>-- but based on the standard set in "Text.Xml.Haxml.Combinators".</span>
<a name="line-3"></a><span class='hs-comment'>-- The main difference is that the Content Filter type becomes a</span>
<a name="line-4"></a><span class='hs-comment'>-- Double Filter. A Double Filter always takes the whole document</span>
<a name="line-5"></a><span class='hs-comment'>-- as an extra argument, so you can start to traverse it again from</span>
<a name="line-6"></a><span class='hs-comment'>-- the root, when at any inner location within the document tree.</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- The new combinator definitions are derived from the old ones.</span>
<a name="line-9"></a><span class='hs-comment'>-- The same names have the equivalent meaning - use module qualification</span>
<a name="line-10"></a><span class='hs-comment'>-- on imports to distinguish between CFilter and DFilter variations.</span>
<a name="line-11"></a>
<a name="line-12"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XML</span><span class='hs-varop'>.</span><span class='hs-conid'>HaXml</span><span class='hs-varop'>.</span><span class='hs-conid'>Xtract</span><span class='hs-varop'>.</span><span class='hs-conid'>Combinators</span> <span class='hs-keyword'>where</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XML</span><span class='hs-varop'>.</span><span class='hs-conid'>HaXml</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XML</span><span class='hs-varop'>.</span><span class='hs-conid'>HaXml</span><span class='hs-varop'>.</span><span class='hs-conid'>Combinators</span> <span class='hs-layout'>(</span><span class='hs-conid'>CFilter</span><span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XML</span><span class='hs-varop'>.</span><span class='hs-conid'>HaXml</span><span class='hs-varop'>.</span><span class='hs-conid'>Combinators</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-17"></a>
<a name="line-18"></a>
<a name="line-19"></a><a name="DFilter"></a><span class='hs-comment'>-- | double content filter - takes document root + local subtree.</span>
<a name="line-20"></a><a name="DFilter"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Content</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Content</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Content</span> <span class='hs-varid'>i</span><span class='hs-keyglyph'>]</span>
<a name="line-21"></a>
<a name="line-22"></a><a name="local"></a><span class='hs-comment'>-- | lift an ordinary content filter to a double filter.</span>
<a name="line-23"></a><span class='hs-definition'>local</span><span class='hs-layout'>,</span><span class='hs-varid'>global</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-24"></a><span class='hs-definition'>local</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-sel'>_xml</span> <span class='hs-varid'>sub</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>sub</span>
<a name="line-25"></a><a name="global"></a><span class='hs-definition'>global</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>xml</span> <span class='hs-sel'>_sub</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span>
<a name="line-26"></a>
<a name="line-27"></a><a name="dfilter"></a><span class='hs-comment'>-- | drop a double filter to an ordinary content filter.</span>
<a name="line-28"></a><span class='hs-comment'>-- (permitting interior access to document root)</span>
<a name="line-29"></a><span class='hs-definition'>dfilter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span>
<a name="line-30"></a><span class='hs-definition'>dfilter</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>xml</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="cfilter"></a><span class='hs-comment'>-- | drop a double filter to an ordinary content filter.</span>
<a name="line-33"></a><span class='hs-comment'>-- (Where interior access to the document root is not needed, the</span>
<a name="line-34"></a><span class='hs-comment'>-- retaining pointer to the outer element can be pruned away.</span>
<a name="line-35"></a><span class='hs-comment'>-- 'cfilter' is more space-efficient than 'dfilter' in this situation.)</span>
<a name="line-36"></a><span class='hs-definition'>cfilter</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span>
<a name="line-37"></a><span class='hs-definition'>cfilter</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>undefined</span> <span class='hs-varid'>xml</span>
<a name="line-38"></a><span class='hs-comment'>--cfilter f = \xml-> flip f xml</span>
<a name="line-39"></a><span class='hs-comment'>-- (case xml of</span>
<a name="line-40"></a><span class='hs-comment'>-- CElem (Elem n as cs) i -> CElem (Elem n [] []) i</span>
<a name="line-41"></a><span class='hs-comment'>-- _ -> xml)</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="liftLocal"></a><span class='hs-comment'>-- | lift a CFilter combinator to a DFilter combinator</span>
<a name="line-44"></a><span class='hs-definition'>liftLocal</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftGlobal</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span><span class='hs-keyglyph'>-></span><span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span><span class='hs-keyglyph'>-></span><span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-45"></a><span class='hs-definition'>liftLocal</span> <span class='hs-varid'>ff</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>df</span><span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span><span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>ff</span> <span class='hs-layout'>(</span><span class='hs-varid'>df</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>sub</span>
<a name="line-46"></a><a name="liftGlobal"></a><span class='hs-definition'>liftGlobal</span> <span class='hs-varid'>ff</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>df</span><span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span> <span class='hs-sel'>_sub</span><span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>ff</span> <span class='hs-layout'>(</span><span class='hs-varid'>df</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>xml</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="o"></a><span class='hs-comment'>-- | lifted composition over double filters.</span>
<a name="line-49"></a><span class='hs-definition'>o</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-50"></a><a name="o"></a><span class='hs-definition'>g</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-varid'>g</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="%7c%3e%7c"></a><span class='hs-comment'>-- | lifted choice.</span>
<a name="line-53"></a><span class='hs-layout'>(</span><span class='hs-varop'>|>|</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-54"></a><a name="f"></a><span class='hs-definition'>f</span> <span class='hs-varop'>|>|</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span><span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>first</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span> <span class='hs-keyword'>in</span>
<a name="line-55"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>first</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>g</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>first</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="union"></a><span class='hs-comment'>-- | lifted union.</span>
<a name="line-58"></a><span class='hs-definition'>union</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-59"></a><span class='hs-definition'>union</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varop'>++</span><span class='hs-layout'>)</span>
<a name="line-60"></a> <span class='hs-keyword'>where</span>
<a name="line-61"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>g</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="with"></a><span class='hs-comment'>-- | lifted predicates.</span>
<a name="line-64"></a><span class='hs-definition'>with</span><span class='hs-layout'>,</span> <span class='hs-varid'>without</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-65"></a><a name="with"></a><span class='hs-definition'>f</span> <span class='hs-varop'>`with`</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span><span class='hs-varop'>.</span><span class='hs-varid'>g</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span>
<a name="line-66"></a><a name="without"></a><span class='hs-definition'>f</span> <span class='hs-varop'>`without`</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span><span class='hs-varop'>.</span><span class='hs-varid'>g</span> <span class='hs-varid'>xml</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="keep"></a><span class='hs-comment'>-- | lifted unit and zero.</span>
<a name="line-69"></a><span class='hs-definition'>keep</span><span class='hs-layout'>,</span> <span class='hs-varid'>none</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-70"></a><span class='hs-definition'>keep</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-sel'>_xml</span> <span class='hs-varid'>sub</span><span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>sub</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- local C.keep</span>
<a name="line-71"></a><a name="none"></a><span class='hs-definition'>none</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-sel'>_xml</span> <span class='hs-sel'>_sub</span><span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span> <span class='hs-comment'>-- local C.none</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="children"></a><span class='hs-definition'>children</span><span class='hs-layout'>,</span> <span class='hs-varid'>elm</span><span class='hs-layout'>,</span> <span class='hs-varid'>txt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-74"></a><span class='hs-definition'>children</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>local</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>children</span>
<a name="line-75"></a><a name="elm"></a><span class='hs-definition'>elm</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>local</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>elm</span>
<a name="line-76"></a><a name="txt"></a><span class='hs-definition'>txt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>local</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>txt</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="applypred"></a><span class='hs-definition'>applypred</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CFilter</span> <span class='hs-varid'>i</span>
<a name="line-79"></a><span class='hs-definition'>applypred</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span><span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`with`</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>xml</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="iffind"></a><span class='hs-definition'>iffind</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-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-82"></a><span class='hs-definition'>iffind</span> <span class='hs-varid'>key</span> <span class='hs-varid'>yes</span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>CElem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>as</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>
<a name="line-83"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>lookup</span> <span class='hs-layout'>(</span><span class='hs-conid'>N</span> <span class='hs-varid'>key</span><span class='hs-layout'>)</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-84"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span>
<a name="line-85"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>v</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>AttValue</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>yes</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span>
<a name="line-86"></a><span class='hs-definition'>iffind</span> <span class='hs-sel'>_key</span> <span class='hs-sel'>_yes</span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>other</span>
<a name="line-87"></a>
<a name="line-88"></a><a name="ifTxt"></a><span class='hs-definition'>ifTxt</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>-></span><span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-89"></a><span class='hs-definition'>ifTxt</span> <span class='hs-varid'>yes</span> <span class='hs-sel'>_no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>CString</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yes</span> <span class='hs-varid'>s</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span>
<a name="line-90"></a><span class='hs-definition'>ifTxt</span> <span class='hs-sel'>_yes</span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>no</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>c</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="cat"></a><span class='hs-definition'>cat</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>b</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-93"></a><span class='hs-definition'>cat</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span><span class='hs-keyglyph'>-></span> <span class='hs-varid'>concat</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xml</span> <span class='hs-varid'>sub</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>]</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="/%3e"></a><span class='hs-layout'>(</span><span class='hs-varop'>/></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-96"></a><span class='hs-definition'>f</span> <span class='hs-varop'>/></span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>children</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>f</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="%3c/"></a><span class='hs-layout'>(</span><span class='hs-varop'></</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-99"></a><span class='hs-definition'>f</span> <span class='hs-varop'></</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`with`</span> <span class='hs-layout'>(</span><span class='hs-varid'>g</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>children</span><span class='hs-layout'>)</span>
<a name="line-100"></a>
<a name="line-101"></a><a name="deep"></a><span class='hs-definition'>deep</span><span class='hs-layout'>,</span> <span class='hs-varid'>deepest</span><span class='hs-layout'>,</span> <span class='hs-varid'>multi</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DFilter</span> <span class='hs-varid'>i</span>
<a name="line-102"></a><span class='hs-definition'>deep</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>|>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>deep</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>children</span><span class='hs-layout'>)</span>
<a name="line-103"></a><a name="deepest"></a><span class='hs-definition'>deepest</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>deepest</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>children</span><span class='hs-layout'>)</span> <span class='hs-varop'>|>|</span> <span class='hs-varid'>f</span>
<a name="line-104"></a><a name="multi"></a><span class='hs-definition'>multi</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`union`</span> <span class='hs-layout'>(</span><span class='hs-varid'>multi</span> <span class='hs-varid'>f</span> <span class='hs-varop'>`o`</span> <span class='hs-varid'>children</span><span class='hs-layout'>)</span>
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