hxt-8.0.0: doc/hdoc/src/Text-XML-HXT-XSLT-Common.html
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<pre><a name="line-1"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='comment'>{- |
<a name="line-4"></a> Module : Text.XML.HXT.XSLT.Application
<a name="line-5"></a> Copyright : Copyright (C) 2006 Tim Walkenhorst, Uwe Schmidt
<a name="line-6"></a> License : MIT
<a name="line-7"></a>
<a name="line-8"></a> Maintainer : Uwe Schmidt (uwe\@fh-wedel.de)
<a name="line-9"></a> Stability : experimental
<a name="line-10"></a> Portability: portable
<a name="line-11"></a> Version : $Id: Common.hs,v 1.5 2007/05/02 06:41:05 hxml Exp $
<a name="line-12"></a>
<a name="line-13"></a> Common imports and functions for HXSLT
<a name="line-14"></a>
<a name="line-15"></a>-}</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='comment'>-- ------------------------------------------------------------</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XSLT</span><span class='varop'>.</span><span class='conid'>Common</span>
<a name="line-20"></a> <span class='layout'>(</span> <span class='keyword'>module</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span>
<a name="line-21"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlNode</span>
<a name="line-22"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlKeywords</span>
<a name="line-23"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>TypeDefs</span>
<a name="line-24"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>FormatXmlTree</span>
<a name="line-25"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathDataTypes</span>
<a name="line-26"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathParser</span>
<a name="line-27"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathEval</span>
<a name="line-28"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathFct</span>
<a name="line-29"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathToString</span>
<a name="line-30"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>NavTree</span>
<a name="line-31"></a> <span class='layout'>,</span> <span class='keyword'>module</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Tree</span><span class='varop'>.</span><span class='conid'>Class</span>
<a name="line-32"></a>
<a name="line-33"></a> <span class='comment'>-- Tree Functions</span>
<a name="line-34"></a> <span class='layout'>,</span> <span class='varid'>filterTree</span> <span class='comment'>-- Tree t => (a -> Bool) -> t a -> Maybe (t a)</span>
<a name="line-35"></a> <span class='layout'>,</span> <span class='varid'>mapTreeCtx</span> <span class='comment'>-- Tree t => (c -> a -> (c, b)) -> c -> t a -> t b</span>
<a name="line-36"></a> <span class='layout'>,</span> <span class='varid'>filterTreeCtx</span> <span class='comment'>-- Tree t => (c -> a -> (c, Bool)) -> c -> t a -> Maybe (t a)</span>
<a name="line-37"></a> <span class='layout'>,</span> <span class='varid'>zipTreeWith</span> <span class='comment'>-- Tree t => (a -> b -> c) -> t a -> t b -> t c</span>
<a name="line-38"></a> <span class='layout'>,</span> <span class='varid'>zipTree</span> <span class='comment'>-- Tree t => t a -> t b -> t (a,b) (zipTreeWith (,))</span>
<a name="line-39"></a> <span class='layout'>,</span> <span class='varid'>unzipTree</span> <span class='comment'>-- Tree t => t (a,b) -> (t a, t b) (mapTree fst &&& mapTree snd)</span>
<a name="line-40"></a> <span class='layout'>,</span> <span class='varid'>showTrees</span>
<a name="line-41"></a>
<a name="line-42"></a> <span class='comment'>-- XML functions</span>
<a name="line-43"></a> <span class='layout'>,</span> <span class='varid'>isElemType</span> <span class='comment'>-- XmlNode n => QName -> n -> Bool</span>
<a name="line-44"></a> <span class='layout'>,</span> <span class='varid'>isAttrType</span> <span class='comment'>-- XmlNode n => QName -> n -> Bool</span>
<a name="line-45"></a> <span class='layout'>,</span> <span class='varid'>isWhitespaceNode</span> <span class='comment'>-- XmlTree -> Bool</span>
<a name="line-46"></a> <span class='layout'>,</span> <span class='varid'>collectTextnodes</span> <span class='comment'>-- [XmlTree] -> String</span>
<a name="line-47"></a> <span class='layout'>,</span> <span class='varid'>tryFetchAttribute</span> <span class='comment'>-- XmlNode n => n -> QName -> Maybe String</span>
<a name="line-48"></a> <span class='layout'>,</span> <span class='varid'>fetchAttributeWDefault</span> <span class='comment'>-- XmlNode n => n -> QName -> String -> String</span>
<a name="line-49"></a> <span class='layout'>,</span> <span class='varid'>fetchAttribute</span> <span class='comment'>-- XmlNode n => n -> QName -> String</span>
<a name="line-50"></a> <span class='layout'>,</span> <span class='varid'>hasAttribute</span> <span class='comment'>-- XmlNode n => n -> QName -> Bool</span>
<a name="line-51"></a> <span class='layout'>,</span> <span class='varid'>setAttribute</span> <span class='comment'>-- XmlNode n => QName -> String -> n -> n</span>
<a name="line-52"></a>
<a name="line-53"></a> <span class='comment'>-- Namespace functions</span>
<a name="line-54"></a> <span class='layout'>,</span> <span class='conid'>ExName</span><span class='layout'>(</span><span class='conid'>ExName</span><span class='layout'>)</span> <span class='comment'>-- String (local) -> String (uri) -> ExName</span>
<a name="line-55"></a> <span class='layout'>,</span> <span class='varid'>mkExName</span> <span class='comment'>-- QName -> ExName</span>
<a name="line-56"></a> <span class='layout'>,</span> <span class='varid'>exLocal</span> <span class='comment'>-- ExName -> String</span>
<a name="line-57"></a> <span class='layout'>,</span> <span class='varid'>exUri</span> <span class='comment'>-- ExName -> String</span>
<a name="line-58"></a> <span class='layout'>,</span> <span class='varid'>parseExName</span> <span class='comment'>-- UriMapping -> String -> ExName</span>
<a name="line-59"></a> <span class='layout'>,</span> <span class='conid'>UriMapping</span> <span class='comment'>-- Map String String</span>
<a name="line-60"></a> <span class='layout'>,</span> <span class='varid'>getUriMap</span> <span class='comment'>-- XmlNode n => n -> UriMapping (extract an Ns-Uri Map from an Element node)</span>
<a name="line-61"></a> <span class='layout'>,</span> <span class='varid'>setUriMap</span> <span class='comment'>-- XmlNode n => UriMap -> n -> n</span>
<a name="line-62"></a> <span class='layout'>,</span> <span class='varid'>uriMap2Attrs</span> <span class='comment'>-- UriMapping -> [XmlTree] (create xmlns:* Attribute nodes for Uri-Mapping)</span>
<a name="line-63"></a> <span class='layout'>,</span> <span class='varid'>expandNSDecls</span> <span class='comment'>-- XmlTree -> XmlTree</span>
<a name="line-64"></a> <span class='layout'>,</span> <span class='varid'>lookupPrefix</span> <span class='comment'>-- UriMapping -> String -> String</span>
<a name="line-65"></a> <span class='layout'>,</span> <span class='varid'>isNsAttr</span> <span class='comment'>-- XmlTree -> Bool</span>
<a name="line-66"></a>
<a name="line-67"></a> <span class='comment'>-- additions to XPATH:</span>
<a name="line-68"></a> <span class='layout'>,</span> <span class='varid'>mkLiteralExpr</span> <span class='comment'>-- String -> Expr</span>
<a name="line-69"></a> <span class='layout'>,</span> <span class='varid'>mkStringExpr</span> <span class='comment'>-- Expr -> Expr</span>
<a name="line-70"></a> <span class='layout'>,</span> <span class='varid'>mkBoolExpr</span> <span class='comment'>-- Expr -> Expr</span>
<a name="line-71"></a> <span class='layout'>,</span> <span class='varid'>mkTrueExpr</span> <span class='comment'>-- Expr</span>
<a name="line-72"></a> <span class='layout'>,</span> <span class='varid'>concatExpr</span> <span class='comment'>-- [Expr] -> Expr</span>
<a name="line-73"></a> <span class='layout'>,</span> <span class='varid'>splitExpr</span> <span class='comment'>-- Expr -> [Expr]</span>
<a name="line-74"></a> <span class='layout'>,</span> <span class='varid'>unionExpr</span> <span class='comment'>-- [Expr] -> Expr</span>
<a name="line-75"></a> <span class='layout'>,</span> <span class='varid'>splitMatchByPrio</span> <span class='comment'>-- Expr -> [(Float, Expr)]</span>
<a name="line-76"></a> <span class='layout'>,</span> <span class='varid'>computePriority</span> <span class='comment'>-- Expr -> Float</span>
<a name="line-77"></a> <span class='layout'>,</span> <span class='varid'>computeNTestPriority</span> <span class='comment'>-- NodeTest -> Float</span>
<a name="line-78"></a> <span class='layout'>,</span> <span class='varid'>isMatchExpr</span> <span class='comment'>-- Expr -> Bool</span>
<a name="line-79"></a>
<a name="line-80"></a> <span class='comment'>-- Misc.:</span>
<a name="line-81"></a> <span class='layout'>,</span> <span class='varid'>fromJustErr</span> <span class='comment'>-- String -> Maybe a -> a, fromJust with error message</span>
<a name="line-82"></a> <span class='layout'>,</span> <span class='varid'>readWDefault</span> <span class='comment'>-- Read a => a -> String -> a</span>
<a name="line-83"></a> <span class='layout'>)</span>
<a name="line-84"></a><span class='keyword'>where</span>
<a name="line-85"></a>
<a name="line-86"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span>
<a name="line-87"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ListArrow</span>
<a name="line-88"></a><span class='keyword'>import</span> <span class='conid'>Control</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>ArrowList</span>
<a name="line-89"></a>
<a name="line-90"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>Arrow</span><span class='varop'>.</span><span class='conid'>XmlArrow</span>
<a name="line-91"></a> <span class='layout'>(</span> <span class='varid'>xshow</span>
<a name="line-92"></a> <span class='layout'>)</span>
<a name="line-93"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlNode</span>
<a name="line-94"></a> <span class='layout'>(</span> <span class='conid'>XmlNode</span> <span class='layout'>(</span><span class='keyglyph'>..</span><span class='layout'>)</span>
<a name="line-95"></a> <span class='layout'>,</span> <span class='varid'>mkElement</span>
<a name="line-96"></a> <span class='layout'>,</span> <span class='varid'>mkRoot</span>
<a name="line-97"></a> <span class='layout'>,</span> <span class='varid'>mkAttr</span>
<a name="line-98"></a> <span class='layout'>,</span> <span class='varid'>mergeAttrl</span>
<a name="line-99"></a> <span class='layout'>)</span>
<a name="line-100"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>XmlKeywords</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>TypeDefs</span>
<a name="line-103"></a> <span class='layout'>(</span> <span class='conid'>XmlTree</span>
<a name="line-104"></a> <span class='layout'>,</span> <span class='conid'>XNode</span><span class='layout'>(</span><span class='conid'>XTag</span><span class='layout'>,</span> <span class='conid'>XAttr</span><span class='layout'>)</span>
<a name="line-105"></a> <span class='layout'>,</span> <span class='conid'>QName</span><span class='layout'>(</span><span class='varid'>namePrefix</span><span class='layout'>,</span> <span class='varid'>localPart</span><span class='layout'>,</span> <span class='varid'>namespaceUri</span><span class='layout'>)</span>
<a name="line-106"></a> <span class='layout'>,</span> <span class='varid'>equivQName</span>
<a name="line-107"></a> <span class='layout'>,</span> <span class='varid'>mkName</span>
<a name="line-108"></a> <span class='layout'>,</span> <span class='varid'>mkQName</span>
<a name="line-109"></a> <span class='layout'>)</span>
<a name="line-110"></a>
<a name="line-111"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>DOM</span><span class='varop'>.</span><span class='conid'>FormatXmlTree</span>
<a name="line-112"></a> <span class='layout'>(</span> <span class='varid'>formatXmlTree</span> <span class='layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathDataTypes</span>
<a name="line-115"></a> <span class='layout'>(</span> <span class='conid'>Expr</span><span class='layout'>(</span><span class='conid'>LiteralExpr</span><span class='layout'>,</span> <span class='conid'>FctExpr</span><span class='layout'>,</span> <span class='conid'>GenExpr</span><span class='layout'>,</span> <span class='conid'>PathExpr</span><span class='layout'>)</span>
<a name="line-116"></a> <span class='layout'>,</span> <span class='conid'>Op</span><span class='layout'>(</span><span class='conid'>Union</span><span class='layout'>)</span>
<a name="line-117"></a> <span class='layout'>,</span> <span class='conid'>LocationPath</span> <span class='layout'>(</span><span class='conid'>LocPath</span><span class='layout'>)</span>
<a name="line-118"></a> <span class='layout'>,</span> <span class='conid'>Path</span> <span class='layout'>(</span><span class='conid'>Rel</span><span class='layout'>)</span>
<a name="line-119"></a> <span class='layout'>,</span> <span class='conid'>XStep</span> <span class='layout'>(</span><span class='conid'>Step</span><span class='layout'>)</span>
<a name="line-120"></a> <span class='layout'>,</span> <span class='conid'>NodeTest</span> <span class='layout'>(</span><span class='conid'>NameTest</span><span class='layout'>,</span> <span class='conid'>PI</span><span class='layout'>,</span> <span class='conid'>TypeTest</span><span class='layout'>)</span>
<a name="line-121"></a> <span class='layout'>,</span> <span class='conid'>NavXmlTree</span>
<a name="line-122"></a> <span class='layout'>,</span> <span class='conid'>XPathValue</span><span class='layout'>(</span><span class='conid'>XPVNode</span><span class='layout'>,</span> <span class='conid'>XPVBool</span><span class='layout'>,</span> <span class='conid'>XPVString</span><span class='layout'>,</span> <span class='conid'>XPVError</span><span class='layout'>)</span>
<a name="line-123"></a> <span class='layout'>)</span>
<a name="line-124"></a>
<a name="line-125"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathParser</span>
<a name="line-126"></a> <span class='layout'>(</span> <span class='varid'>parseXPath</span> <span class='layout'>)</span>
<a name="line-127"></a>
<a name="line-128"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathEval</span>
<a name="line-129"></a> <span class='layout'>(</span> <span class='varid'>evalExpr</span> <span class='layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathFct</span>
<a name="line-132"></a> <span class='layout'>(</span> <span class='varid'>isNotInNodeList</span> <span class='layout'>)</span>
<a name="line-133"></a>
<a name="line-134"></a><span class='keyword'>import</span> <span class='conid'>Text</span><span class='varop'>.</span><span class='conid'>XML</span><span class='varop'>.</span><span class='conid'>HXT</span><span class='varop'>.</span><span class='conid'>XPath</span><span class='varop'>.</span><span class='conid'>XPathToString</span>
<a name="line-135"></a> <span class='layout'>(</span> <span class='varid'>xPValue2XmlTrees</span> <span class='layout'>)</span>
<a name="line-136"></a>
<a name="line-137"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Map</span> <span class='layout'>(</span><span class='conid'>Map</span><span class='layout'>)</span>
<a name="line-138"></a><span class='keyword'>import</span> <span class='keyword'>qualified</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Map</span> <span class='keyword'>as</span> <span class='conid'>Map</span> <span class='varid'>hiding</span> <span class='layout'>(</span><span class='conid'>Map</span><span class='layout'>)</span>
<a name="line-139"></a>
<a name="line-140"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Tree</span><span class='varop'>.</span><span class='conid'>Class</span>
<a name="line-141"></a>
<a name="line-142"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>NavTree</span>
<a name="line-143"></a> <span class='layout'>(</span> <span class='conid'>NavTree</span>
<a name="line-144"></a> <span class='layout'>,</span> <span class='varid'>ntree</span>
<a name="line-145"></a> <span class='layout'>,</span> <span class='varid'>subtreeNT</span>
<a name="line-146"></a> <span class='layout'>,</span> <span class='varid'>upNT</span>
<a name="line-147"></a> <span class='layout'>,</span> <span class='varid'>downNT</span>
<a name="line-148"></a> <span class='layout'>,</span> <span class='varid'>rightNT</span>
<a name="line-149"></a> <span class='layout'>,</span> <span class='varid'>leftNT</span>
<a name="line-150"></a> <span class='layout'>,</span> <span class='varid'>getChildrenNT</span>
<a name="line-151"></a> <span class='layout'>)</span>
<a name="line-152"></a>
<a name="line-153"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Maybe</span>
<a name="line-154"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>List</span>
<a name="line-155"></a><span class='keyword'>import</span> <span class='conid'>Data</span><span class='varop'>.</span><span class='conid'>Char</span>
<a name="line-156"></a>
<a name="line-157"></a><span class='comment'>--------------------------- </span>
<a name="line-158"></a><span class='comment'>-- Tree functions</span>
<a name="line-159"></a>
<a name="line-160"></a><span class='comment'>-- mapTree :: Functor t => (a -> b) -> t a -> t b</span>
<a name="line-161"></a><span class='comment'>-- mapTree = fmap</span>
<a name="line-162"></a>
<a name="line-163"></a><span class='comment'>-- "map" on a tree with a context. </span>
<a name="line-164"></a><span class='comment'>-- Contextual information from the ancestors of the current node can be collected in the context</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="mapTreeCtx"></a><span class='definition'>mapTreeCtx</span> <span class='keyglyph'>::</span> <span class='conid'>Tree</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='varid'>c</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>c</span><span class='layout'>,</span> <span class='varid'>b</span><span class='layout'>)</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>c</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>b</span>
<a name="line-167"></a><span class='definition'>mapTreeCtx</span> <span class='varid'>f</span> <span class='varid'>c</span> <span class='varid'>tree</span> <span class='keyglyph'>=</span>
<a name="line-168"></a> <span class='varid'>mkTree</span> <span class='varid'>b</span> <span class='varop'>$</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>mapTreeCtx</span> <span class='varid'>f</span> <span class='varid'>cN</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varid'>tree</span>
<a name="line-169"></a> <span class='keyword'>where</span>
<a name="line-170"></a> <span class='layout'>(</span><span class='varid'>cN</span><span class='layout'>,</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>f</span> <span class='varid'>c</span> <span class='varop'>$</span> <span class='varid'>getNode</span> <span class='varid'>tree</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="filterTree"></a><span class='definition'>filterTree</span> <span class='keyglyph'>::</span> <span class='conid'>Tree</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='conid'>Maybe</span> <span class='layout'>(</span><span class='varid'>t</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-173"></a><span class='definition'>filterTree</span> <span class='varid'>p</span> <span class='varid'>tree</span> <span class='keyglyph'>=</span> <span class='keyword'>if</span> <span class='varid'>p</span> <span class='varid'>node</span>
<a name="line-174"></a> <span class='keyword'>then</span> <span class='conid'>Just</span> <span class='varop'>$</span> <span class='varid'>mkTree</span> <span class='varid'>node</span> <span class='varop'>$</span> <span class='varid'>mapMaybe</span> <span class='layout'>(</span><span class='varid'>filterTree</span> <span class='varid'>p</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varid'>tree</span>
<a name="line-175"></a> <span class='keyword'>else</span> <span class='conid'>Nothing</span>
<a name="line-176"></a> <span class='keyword'>where</span> <span class='varid'>node</span> <span class='keyglyph'>=</span> <span class='varid'>getNode</span> <span class='varid'>tree</span>
<a name="line-177"></a>
<a name="line-178"></a><a name="filterTreeCtx"></a><span class='comment'>-- "filter" on a tree with a context. </span>
<a name="line-179"></a><span class='comment'>-- Contextual information from the ancestors of the current node can be collected in the context</span>
<a name="line-180"></a><span class='definition'>filterTreeCtx</span> <span class='keyglyph'>::</span> <span class='conid'>Tree</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='varid'>c</span> <span class='keyglyph'>-></span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>c</span><span class='layout'>,</span> <span class='conid'>Bool</span><span class='layout'>)</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>c</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='conid'>Maybe</span> <span class='layout'>(</span><span class='varid'>t</span> <span class='varid'>a</span><span class='layout'>)</span>
<a name="line-181"></a><span class='definition'>filterTreeCtx</span> <span class='varid'>p</span> <span class='varid'>c</span> <span class='varid'>tree</span> <span class='keyglyph'>=</span>
<a name="line-182"></a> <span class='keyword'>if</span> <span class='varid'>b</span>
<a name="line-183"></a> <span class='keyword'>then</span> <span class='conid'>Just</span> <span class='varop'>$</span> <span class='varid'>mkTree</span> <span class='varid'>node</span> <span class='varop'>$</span> <span class='varid'>mapMaybe</span> <span class='layout'>(</span><span class='varid'>filterTreeCtx</span> <span class='varid'>p</span> <span class='varid'>cN</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varid'>tree</span>
<a name="line-184"></a> <span class='keyword'>else</span> <span class='conid'>Nothing</span>
<a name="line-185"></a> <span class='keyword'>where</span>
<a name="line-186"></a> <span class='layout'>(</span><span class='varid'>cN</span><span class='layout'>,</span> <span class='varid'>b</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>p</span> <span class='varid'>c</span> <span class='varid'>node</span>
<a name="line-187"></a> <span class='varid'>node</span> <span class='keyglyph'>=</span> <span class='varid'>getNode</span> <span class='varid'>tree</span>
<a name="line-188"></a>
<a name="line-189"></a><a name="zipTreeWith"></a><span class='definition'>zipTreeWith</span> <span class='keyglyph'>::</span> <span class='conid'>Tree</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='layout'>(</span><span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='varid'>b</span> <span class='keyglyph'>-></span> <span class='varid'>c</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>b</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>c</span>
<a name="line-190"></a><span class='definition'>zipTreeWith</span> <span class='varid'>f</span> <span class='varid'>a</span> <span class='varid'>b</span> <span class='keyglyph'>=</span> <span class='varid'>mkTree</span> <span class='layout'>(</span><span class='varid'>f</span> <span class='layout'>(</span><span class='varid'>getNode</span> <span class='varid'>a</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>getNode</span> <span class='varid'>b</span><span class='layout'>)</span><span class='layout'>)</span>
<a name="line-191"></a> <span class='varop'>$</span> <span class='varid'>zipWith</span> <span class='layout'>(</span><span class='varid'>zipTreeWith</span> <span class='varid'>f</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>getChildren</span> <span class='varid'>a</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varid'>b</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="zipTree"></a><span class='definition'>zipTree</span> <span class='keyglyph'>::</span> <span class='conid'>Tree</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='varid'>t</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='varid'>b</span> <span class='keyglyph'>-></span> <span class='varid'>t</span> <span class='layout'>(</span><span class='varid'>a</span><span class='layout'>,</span><span class='varid'>b</span><span class='layout'>)</span>
<a name="line-194"></a><span class='definition'>zipTree</span> <span class='keyglyph'>=</span> <span class='varid'>zipTreeWith</span> <span class='conid'>(,)</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="unzipTree"></a><span class='definition'>unzipTree</span> <span class='keyglyph'>::</span> <span class='conid'>Functor</span> <span class='varid'>t</span> <span class='keyglyph'>=></span> <span class='varid'>t</span> <span class='layout'>(</span><span class='varid'>a</span><span class='layout'>,</span><span class='varid'>b</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='varid'>t</span> <span class='varid'>a</span><span class='layout'>,</span> <span class='varid'>t</span> <span class='varid'>b</span><span class='layout'>)</span>
<a name="line-197"></a><span class='definition'>unzipTree</span> <span class='keyglyph'>=</span> <span class='varid'>fmap</span> <span class='varid'>fst</span> <span class='varop'>&&&</span> <span class='varid'>fmap</span> <span class='varid'>snd</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="showTrees"></a><span class='definition'>showTrees</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-200"></a><span class='definition'>showTrees</span> <span class='varid'>ts</span>
<a name="line-201"></a> <span class='keyglyph'>=</span> <span class='varid'>concat</span>
<a name="line-202"></a> <span class='layout'>(</span><span class='varid'>runLA</span> <span class='layout'>(</span><span class='varid'>xshow</span> <span class='layout'>(</span><span class='varid'>constL</span> <span class='varid'>ts</span><span class='layout'>)</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>undefined</span><span class='layout'>)</span>
<a name="line-203"></a>
<a name="line-204"></a><span class='comment'>--------------------------- </span>
<a name="line-205"></a><span class='comment'>-- Xml Functions</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="collectTextnodes"></a><span class='definition'>collectTextnodes</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-208"></a><span class='definition'>collectTextnodes</span>
<a name="line-209"></a> <span class='keyglyph'>=</span> <span class='varid'>concat</span> <span class='varop'>.</span> <span class='varid'>mapMaybe</span> <span class='varid'>getText</span>
<a name="line-210"></a>
<a name="line-211"></a><a name="isElemType"></a><span class='definition'>isElemType</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-212"></a><span class='definition'>isElemType</span> <span class='varid'>qn</span> <span class='varid'>node</span>
<a name="line-213"></a> <span class='keyglyph'>=</span> <span class='varid'>isElem</span> <span class='varid'>node</span>
<a name="line-214"></a> <span class='varop'>&&</span>
<a name="line-215"></a> <span class='varid'>equivQName</span> <span class='varid'>qn</span> <span class='layout'>(</span><span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getElemName</span> <span class='varid'>node</span><span class='layout'>)</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="isAttrType"></a><span class='definition'>isAttrType</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-218"></a><span class='definition'>isAttrType</span> <span class='varid'>qname</span> <span class='varid'>node</span>
<a name="line-219"></a> <span class='keyglyph'>=</span> <span class='varid'>isAttr</span> <span class='varid'>node</span>
<a name="line-220"></a> <span class='varop'>&&</span>
<a name="line-221"></a> <span class='varid'>equivQName</span> <span class='varid'>qname</span> <span class='layout'>(</span><span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getAttrName</span> <span class='varid'>node</span><span class='layout'>)</span>
<a name="line-222"></a>
<a name="line-223"></a><a name="tryFetchAttribute"></a><span class='definition'>tryFetchAttribute</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>Maybe</span> <span class='conid'>String</span>
<a name="line-224"></a><span class='definition'>tryFetchAttribute</span> <span class='varid'>node</span> <span class='varid'>qn</span>
<a name="line-225"></a> <span class='keyglyph'>|</span> <span class='varid'>isElem</span> <span class='varid'>node</span> <span class='keyglyph'>=</span>
<a name="line-226"></a>
<a name="line-227"></a> <span class='keyword'>if</span> <span class='varid'>null</span> <span class='varid'>candidates</span>
<a name="line-228"></a> <span class='keyword'>then</span> <span class='conid'>Nothing</span>
<a name="line-229"></a>
<a name="line-230"></a> <span class='keyword'>else</span> <span class='keyword'>if</span> <span class='varid'>length</span> <span class='varid'>candidates</span> <span class='varop'>></span> <span class='num'>1</span>
<a name="line-231"></a> <span class='keyword'>then</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"More than one attribute "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>qn</span><span class='layout'>)</span>
<a name="line-232"></a>
<a name="line-233"></a> <span class='keyword'>else</span> <span class='conid'>Just</span> <span class='varop'>$</span> <span class='varid'>collectTextnodes</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varop'>$</span> <span class='varid'>head</span> <span class='varid'>candidates</span>
<a name="line-234"></a>
<a name="line-235"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>Nothing</span>
<a name="line-236"></a> <span class='keyword'>where</span>
<a name="line-237"></a> <span class='varid'>candidates</span> <span class='keyglyph'>=</span> <span class='varid'>filter</span> <span class='layout'>(</span><span class='varid'>isAttrType</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getAttrl</span> <span class='varid'>node</span>
<a name="line-238"></a>
<a name="line-239"></a><a name="fetchAttributeWDefault"></a><span class='definition'>fetchAttributeWDefault</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-240"></a><span class='definition'>fetchAttributeWDefault</span> <span class='varid'>node</span> <span class='varid'>name</span> <span class='varid'>def</span> <span class='keyglyph'>=</span> <span class='varid'>maybe</span> <span class='varid'>def</span> <span class='varid'>id</span> <span class='layout'>(</span><span class='varid'>tryFetchAttribute</span> <span class='varid'>node</span> <span class='varid'>name</span><span class='layout'>)</span>
<a name="line-241"></a>
<a name="line-242"></a><a name="fetchAttribute"></a><span class='definition'>fetchAttribute</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-243"></a><span class='definition'>fetchAttribute</span> <span class='varid'>node</span> <span class='varid'>name</span> <span class='keyglyph'>=</span> <span class='varid'>fetchAttributeWDefault</span> <span class='varid'>node</span> <span class='varid'>name</span> <span class='varop'>$</span> <span class='varid'>error</span> <span class='layout'>(</span><span class='str'>"Element "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='layout'>(</span><span class='varid'>getElemName</span> <span class='varid'>node</span><span class='layout'>)</span> <span class='varop'>++</span> <span class='str'>" has no attribute: "</span> <span class='varop'>++</span> <span class='varid'>show</span> <span class='varid'>name</span><span class='layout'>)</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="hasAttribute"></a><span class='definition'>hasAttribute</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-246"></a><span class='definition'>hasAttribute</span> <span class='varid'>node</span> <span class='keyglyph'>=</span> <span class='varid'>isJust</span> <span class='varop'>.</span> <span class='varid'>tryFetchAttribute</span> <span class='varid'>node</span>
<a name="line-247"></a>
<a name="line-248"></a><a name="setAttribute"></a><span class='definition'>setAttribute</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='varid'>n</span>
<a name="line-249"></a><span class='definition'>setAttribute</span> <span class='varid'>qn</span> <span class='varid'>val</span> <span class='varid'>node</span>
<a name="line-250"></a> <span class='keyglyph'>|</span> <span class='varid'>isElem</span> <span class='varid'>node</span> <span class='keyglyph'>=</span> <span class='varid'>setElemAttrl</span> <span class='layout'>(</span><span class='varid'>newA</span> <span class='conop'>:</span> <span class='varid'>attrs</span><span class='layout'>)</span> <span class='varid'>node</span>
<a name="line-251"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='varop'>$</span> <span class='str'>"setAttribute on none-element node"</span> <span class='comment'>-- how print an XmlNode...</span>
<a name="line-252"></a> <span class='keyword'>where</span>
<a name="line-253"></a> <span class='varid'>attrs</span> <span class='keyglyph'>=</span> <span class='varid'>filter</span> <span class='layout'>(</span><span class='varid'>not</span> <span class='varop'>.</span> <span class='varid'>isAttrType</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getAttrl</span> <span class='varid'>node</span>
<a name="line-254"></a> <span class='varid'>newA</span> <span class='keyglyph'>=</span> <span class='varid'>mkTree</span> <span class='layout'>(</span><span class='conid'>XAttr</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='keyglyph'>[</span><span class='varid'>mkText</span> <span class='varid'>val</span><span class='keyglyph'>]</span>
<a name="line-255"></a>
<a name="line-256"></a><a name="isWhitespaceNode"></a><span class='definition'>isWhitespaceNode</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>XmlNode</span> <span class='varid'>n</span><span class='layout'>)</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-257"></a><span class='definition'>isWhitespaceNode</span> <span class='keyglyph'>=</span> <span class='varid'>maybe</span> <span class='conid'>False</span> <span class='layout'>(</span><span class='varid'>all</span> <span class='varid'>isSpace</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>getText</span>
<a name="line-258"></a>
<a name="line-259"></a><span class='comment'>--------------------------- </span>
<a name="line-260"></a><span class='comment'>-- Namespace Functions</span>
<a name="line-261"></a>
<a name="line-262"></a><span class='comment'>-- Expanded name, is unique can therefore be used as a key (unlike QName)</span>
<a name="line-263"></a>
<a name="line-264"></a><a name="ExName"></a><span class='keyword'>data</span> <span class='conid'>ExName</span> <span class='keyglyph'>=</span> <span class='conid'>ExName</span> <span class='conid'>String</span> <span class='conid'>String</span>
<a name="line-265"></a> <span class='keyword'>deriving</span> <span class='layout'>(</span><span class='conid'>Show</span><span class='layout'>,</span> <span class='conid'>Eq</span><span class='layout'>,</span> <span class='conid'>Ord</span><span class='layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a><a name="mkExName"></a><span class='definition'>mkExName</span> <span class='keyglyph'>::</span> <span class='conid'>QName</span> <span class='keyglyph'>-></span> <span class='conid'>ExName</span>
<a name="line-268"></a><span class='definition'>mkExName</span> <span class='varid'>qn</span> <span class='keyglyph'>=</span> <span class='conid'>ExName</span> <span class='layout'>(</span><span class='varid'>localPart</span> <span class='varid'>qn</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>namespaceUri</span> <span class='varid'>qn</span><span class='layout'>)</span>
<a name="line-269"></a>
<a name="line-270"></a><a name="exLocal"></a><span class='definition'>exLocal</span><span class='layout'>,</span> <span class='varid'>exUri</span> <span class='keyglyph'>::</span> <span class='conid'>ExName</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-271"></a><span class='definition'>exLocal</span> <span class='layout'>(</span><span class='conid'>ExName</span> <span class='varid'>l</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>l</span>
<a name="line-272"></a><a name="exUri"></a><span class='definition'>exUri</span> <span class='layout'>(</span><span class='conid'>ExName</span> <span class='keyword'>_</span> <span class='varid'>u</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>u</span>
<a name="line-273"></a>
<a name="line-274"></a><a name="parseExName"></a><span class='definition'>parseExName</span> <span class='keyglyph'>::</span> <span class='conid'>UriMapping</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>ExName</span>
<a name="line-275"></a><span class='definition'>parseExName</span> <span class='varid'>uris</span> <span class='varid'>str</span>
<a name="line-276"></a> <span class='keyglyph'>|</span> <span class='varid'>noPrefix</span> <span class='keyglyph'>=</span> <span class='conid'>ExName</span> <span class='varid'>str</span> <span class='str'>""</span>
<a name="line-277"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='conid'>ExName</span> <span class='varid'>loc</span> <span class='varop'>$</span> <span class='varid'>lookupPrefix</span> <span class='varid'>uris</span> <span class='varid'>prefix</span>
<a name="line-278"></a> <span class='keyword'>where</span>
<a name="line-279"></a> <span class='varid'>noPrefix</span> <span class='keyglyph'>=</span> <span class='varid'>null</span> <span class='varid'>loc</span>
<a name="line-280"></a> <span class='varid'>loc</span> <span class='keyglyph'>=</span> <span class='varid'>drop</span> <span class='num'>1</span> <span class='varid'>loc'</span>
<a name="line-281"></a> <span class='layout'>(</span><span class='varid'>prefix</span><span class='layout'>,</span> <span class='varid'>loc'</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>span</span> <span class='layout'>(</span><span class='varop'>/=</span> <span class='chr'>':'</span><span class='layout'>)</span> <span class='varid'>str</span>
<a name="line-282"></a>
<a name="line-283"></a><span class='comment'>-- Mapping from namespace-Prefixes to namespace-URIs</span>
<a name="line-284"></a>
<a name="line-285"></a><a name="UriMapping"></a><span class='keyword'>type</span> <span class='conid'>UriMapping</span> <span class='keyglyph'>=</span> <span class='conid'>Map</span> <span class='conid'>String</span> <span class='conid'>String</span>
<a name="line-286"></a>
<a name="line-287"></a><a name="getUriMap"></a><span class='definition'>getUriMap</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='conid'>UriMapping</span>
<a name="line-288"></a><span class='definition'>getUriMap</span>
<a name="line-289"></a> <span class='keyglyph'>=</span> <span class='varid'>uriMappingsFromNsAttrs</span> <span class='varop'>.</span> <span class='varid'>filter</span> <span class='varid'>isNsAttr</span> <span class='varop'>.</span> <span class='varid'>maybe</span> <span class='varid'>err</span> <span class='varid'>id</span> <span class='varop'>.</span> <span class='varid'>getAttrl</span>
<a name="line-290"></a> <span class='keyword'>where</span>
<a name="line-291"></a> <span class='varid'>err</span> <span class='keyglyph'>=</span> <span class='varid'>error</span> <span class='str'>"Internal error: getUriMap on none-element node"</span>
<a name="line-292"></a>
<a name="line-293"></a><a name="setUriMap"></a><span class='definition'>setUriMap</span> <span class='keyglyph'>::</span> <span class='conid'>XmlNode</span> <span class='varid'>n</span> <span class='keyglyph'>=></span> <span class='conid'>UriMapping</span> <span class='keyglyph'>-></span> <span class='varid'>n</span> <span class='keyglyph'>-></span> <span class='varid'>n</span>
<a name="line-294"></a><span class='definition'>setUriMap</span> <span class='varid'>nsMap</span> <span class='varid'>node</span>
<a name="line-295"></a> <span class='keyglyph'>=</span> <span class='varid'>setElemAttrl</span> <span class='layout'>(</span><span class='varid'>mergeAttrl</span> <span class='layout'>(</span><span class='varid'>maybe</span> <span class='conid'>[]</span> <span class='varid'>id</span> <span class='varop'>$</span> <span class='varid'>getAttrl</span> <span class='varid'>node</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='varid'>uriMap2Attrs</span> <span class='varid'>nsMap</span><span class='layout'>)</span> <span class='varid'>node</span>
<a name="line-296"></a>
<a name="line-297"></a><a name="uriMap2Attrs"></a><span class='definition'>uriMap2Attrs</span> <span class='keyglyph'>::</span> <span class='conid'>UriMapping</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span>
<a name="line-298"></a><span class='definition'>uriMap2Attrs</span>
<a name="line-299"></a> <span class='keyglyph'>=</span> <span class='varid'>map</span> <span class='varid'>joinNsAttr</span> <span class='varop'>.</span> <span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>toAscList</span>
<a name="line-300"></a>
<a name="line-301"></a><a name="lookupPrefix"></a><span class='definition'>lookupPrefix</span> <span class='keyglyph'>::</span> <span class='conid'>UriMapping</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>String</span>
<a name="line-302"></a><span class='definition'>lookupPrefix</span> <span class='varid'>uris</span> <span class='varid'>prefix</span>
<a name="line-303"></a> <span class='keyglyph'>=</span> <span class='varid'>fromJustErr</span> <span class='layout'>(</span><span class='str'>"No namespace-Uri bound to prefix: "</span><span class='varop'>++</span><span class='varid'>prefix</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>lookup</span> <span class='varid'>prefix</span> <span class='varid'>uris</span>
<a name="line-304"></a>
<a name="line-305"></a><a name="expandNSDecls"></a><span class='definition'>expandNSDecls</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span>
<a name="line-306"></a><span class='definition'>expandNSDecls</span>
<a name="line-307"></a> <span class='keyglyph'>=</span> <span class='varid'>mapTreeCtx</span> <span class='layout'>(</span><span class='varid'>expandNSElem</span><span class='layout'>)</span> <span class='varop'>$</span> <span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>fromAscList</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='str'>"xml"</span><span class='layout'>,</span> <span class='varid'>xmlNamespace</span><span class='layout'>)</span><span class='layout'>,</span> <span class='layout'>(</span><span class='str'>"xmlns"</span><span class='layout'>,</span> <span class='varid'>xmlnsNamespace</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="expandNSElem"></a><span class='definition'>expandNSElem</span> <span class='keyglyph'>::</span> <span class='conid'>UriMapping</span> <span class='keyglyph'>-></span> <span class='conid'>XNode</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>UriMapping</span><span class='layout'>,</span> <span class='conid'>XNode</span><span class='layout'>)</span>
<a name="line-310"></a><span class='definition'>expandNSElem</span> <span class='varid'>umap</span> <span class='varid'>node</span>
<a name="line-311"></a> <span class='keyglyph'>|</span> <span class='varid'>isElem</span> <span class='varid'>node</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>umapNew</span><span class='layout'>,</span> <span class='varid'>nodeNew</span><span class='layout'>)</span>
<a name="line-312"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>umap</span><span class='layout'>,</span> <span class='varid'>node</span><span class='layout'>)</span>
<a name="line-313"></a> <span class='keyword'>where</span>
<a name="line-314"></a> <span class='varid'>nodeNew</span> <span class='keyglyph'>=</span> <span class='conid'>XTag</span> <span class='layout'>(</span><span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getElemName</span> <span class='varid'>node</span><span class='layout'>)</span> <span class='varid'>attrNew</span>
<a name="line-315"></a> <span class='varid'>attrNew</span> <span class='keyglyph'>=</span> <span class='varid'>attrs</span> <span class='varop'>++</span> <span class='varid'>map</span> <span class='varid'>joinNsAttr</span> <span class='layout'>(</span><span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>toAscList</span> <span class='varid'>umapNew</span><span class='layout'>)</span>
<a name="line-316"></a> <span class='varid'>umapNew</span> <span class='keyglyph'>=</span> <span class='varid'>uriMappingsFromNsAttrs</span> <span class='varid'>nsAttrs</span> <span class='varop'>`</span><span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>union</span><span class='varop'>`</span> <span class='varid'>umap</span>
<a name="line-317"></a> <span class='layout'>(</span><span class='varid'>nsAttrs</span><span class='layout'>,</span> <span class='varid'>attrs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>partition</span> <span class='varid'>isNsAttr</span> <span class='varop'>$</span> <span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getAttrl</span> <span class='varid'>node</span>
<a name="line-318"></a>
<a name="line-319"></a><a name="uriMappingsFromNsAttrs"></a><span class='definition'>uriMappingsFromNsAttrs</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>XmlTree</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>UriMapping</span>
<a name="line-320"></a><span class='definition'>uriMappingsFromNsAttrs</span>
<a name="line-321"></a> <span class='keyglyph'>=</span> <span class='conid'>Map</span><span class='varop'>.</span><span class='varid'>fromList</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='varid'>splitNsAttr</span>
<a name="line-322"></a>
<a name="line-323"></a><a name="isNsAttr"></a><span class='definition'>isNsAttr</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-324"></a><span class='definition'>isNsAttr</span>
<a name="line-325"></a> <span class='keyglyph'>=</span> <span class='varid'>maybe</span> <span class='conid'>False</span> <span class='layout'>(</span><span class='layout'>(</span><span class='varop'>==</span><span class='layout'>)</span> <span class='varid'>xmlnsNamespace</span> <span class='varop'>.</span> <span class='varid'>namespaceUri</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>getAttrName</span>
<a name="line-326"></a>
<a name="line-327"></a><a name="splitNsAttr"></a><span class='definition'>splitNsAttr</span> <span class='keyglyph'>::</span> <span class='conid'>XmlTree</span> <span class='keyglyph'>-></span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span>
<a name="line-328"></a><span class='definition'>splitNsAttr</span> <span class='varid'>node</span>
<a name="line-329"></a> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>localPart</span> <span class='varop'>$</span> <span class='varid'>fromJust</span> <span class='varop'>$</span> <span class='varid'>getAttrName</span> <span class='varid'>node</span><span class='layout'>,</span> <span class='varid'>collectTextnodes</span> <span class='varop'>$</span> <span class='varid'>getChildren</span> <span class='varid'>node</span><span class='layout'>)</span>
<a name="line-330"></a>
<a name="line-331"></a><a name="joinNsAttr"></a><span class='definition'>joinNsAttr</span> <span class='keyglyph'>::</span> <span class='layout'>(</span><span class='conid'>String</span><span class='layout'>,</span> <span class='conid'>String</span><span class='layout'>)</span> <span class='keyglyph'>-></span> <span class='conid'>XmlTree</span>
<a name="line-332"></a><span class='definition'>joinNsAttr</span> <span class='layout'>(</span><span class='varid'>prefix</span><span class='layout'>,</span> <span class='varid'>uri</span><span class='layout'>)</span>
<a name="line-333"></a> <span class='keyglyph'>=</span> <span class='varid'>mkAttr</span> <span class='layout'>(</span><span class='varid'>mkQName</span> <span class='str'>"xmlns"</span> <span class='varid'>prefix</span> <span class='varid'>xmlnsNamespace</span><span class='layout'>)</span> <span class='keyglyph'>[</span><span class='varid'>mkText</span> <span class='varid'>uri</span><span class='keyglyph'>]</span>
<a name="line-334"></a>
<a name="line-335"></a><span class='comment'>-------------------------</span>
<a name="line-336"></a><span class='comment'>-- additions to XPATH:</span>
<a name="line-337"></a>
<a name="line-338"></a><a name="mkLiteralExpr"></a><span class='definition'>mkLiteralExpr</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Expr</span>
<a name="line-339"></a><span class='definition'>mkLiteralExpr</span> <span class='keyglyph'>=</span> <span class='conid'>LiteralExpr</span>
<a name="line-340"></a>
<a name="line-341"></a><a name="mkStringExpr"></a><span class='definition'>mkStringExpr</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='conid'>Expr</span>
<a name="line-342"></a><span class='definition'>mkStringExpr</span> <span class='keyglyph'>=</span> <span class='conid'>FctExpr</span> <span class='str'>"string"</span> <span class='varop'>.</span> <span class='varid'>return</span>
<a name="line-343"></a>
<a name="line-344"></a><a name="mkBoolExpr"></a><span class='definition'>mkBoolExpr</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='conid'>Expr</span>
<a name="line-345"></a><span class='definition'>mkBoolExpr</span> <span class='keyglyph'>=</span> <span class='conid'>FctExpr</span> <span class='str'>"boolean"</span> <span class='varop'>.</span> <span class='varid'>return</span>
<a name="line-346"></a>
<a name="line-347"></a><a name="mkTrueExpr"></a><span class='definition'>mkTrueExpr</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span>
<a name="line-348"></a><span class='definition'>mkTrueExpr</span> <span class='keyglyph'>=</span> <span class='conid'>FctExpr</span> <span class='str'>"true"</span> <span class='conid'>[]</span>
<a name="line-349"></a>
<a name="line-350"></a><a name="concatExpr"></a><span class='definition'>concatExpr</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Expr</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Expr</span>
<a name="line-351"></a><span class='definition'>concatExpr</span> <span class='conid'>[]</span> <span class='keyglyph'>=</span> <span class='conid'>LiteralExpr</span> <span class='str'>""</span>
<a name="line-352"></a><span class='definition'>concatExpr</span> <span class='keyglyph'>[</span><span class='varid'>lit</span><span class='keyglyph'>@</span><span class='layout'>(</span><span class='conid'>LiteralExpr</span> <span class='keyword'>_</span><span class='layout'>)</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='varid'>lit</span>
<a name="line-353"></a><span class='definition'>concatExpr</span> <span class='varid'>xs1</span><span class='keyglyph'>@</span><span class='keyglyph'>[</span><span class='keyword'>_</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='conid'>FctExpr</span> <span class='str'>"string"</span> <span class='varid'>xs1</span>
<a name="line-354"></a><span class='definition'>concatExpr</span> <span class='varid'>xs</span> <span class='keyglyph'>=</span> <span class='conid'>FctExpr</span> <span class='str'>"concat"</span> <span class='varid'>xs</span>
<a name="line-355"></a>
<a name="line-356"></a><a name="splitExpr"></a><span class='definition'>splitExpr</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='conid'>Expr</span><span class='keyglyph'>]</span>
<a name="line-357"></a><span class='definition'>splitExpr</span> <span class='layout'>(</span><span class='conid'>GenExpr</span> <span class='conid'>Union</span> <span class='varid'>expr</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>expr</span>
<a name="line-358"></a><span class='definition'>splitExpr</span> <span class='varid'>rest</span> <span class='keyglyph'>=</span> <span class='keyglyph'>[</span><span class='varid'>rest</span><span class='keyglyph'>]</span>
<a name="line-359"></a>
<a name="line-360"></a><a name="unionExpr"></a><span class='definition'>unionExpr</span> <span class='keyglyph'>::</span> <span class='keyglyph'>[</span><span class='conid'>Expr</span><span class='keyglyph'>]</span> <span class='keyglyph'>-></span> <span class='conid'>Expr</span>
<a name="line-361"></a><span class='definition'>unionExpr</span> <span class='keyglyph'>[</span><span class='varid'>e</span><span class='keyglyph'>]</span> <span class='keyglyph'>=</span> <span class='varid'>e</span>
<a name="line-362"></a><span class='definition'>unionExpr</span> <span class='varid'>es</span> <span class='keyglyph'>=</span> <span class='conid'>GenExpr</span> <span class='conid'>Union</span> <span class='varid'>es</span>
<a name="line-363"></a>
<a name="line-364"></a><a name="splitMatchByPrio"></a><span class='comment'>-- Intelligent splitting: Split an expression into subexpressions with equal priority</span>
<a name="line-365"></a><span class='comment'>-- for example: "a|c/d|e|f/g" => [(0.0, "a|e"), (0.5, "c/d|f/g")]</span>
<a name="line-366"></a><span class='definition'>splitMatchByPrio</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='conid'>Float</span><span class='layout'>,</span> <span class='conid'>Expr</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-367"></a><span class='definition'>splitMatchByPrio</span> <span class='keyglyph'>=</span>
<a name="line-368"></a> <span class='varid'>map</span> <span class='varid'>compress</span> <span class='varop'>.</span> <span class='varid'>groupBy</span> <span class='varid'>eq</span> <span class='varop'>.</span> <span class='varid'>sortBy</span> <span class='varid'>cmp</span> <span class='varop'>.</span> <span class='varid'>map</span> <span class='layout'>(</span><span class='varid'>computePriority</span> <span class='varop'>&&&</span> <span class='varid'>id</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>splitExpr</span>
<a name="line-369"></a> <span class='keyword'>where</span>
<a name="line-370"></a> <span class='varid'>eq</span> <span class='varid'>x</span> <span class='varid'>y</span> <span class='keyglyph'>=</span> <span class='varid'>fst</span> <span class='varid'>x</span> <span class='varop'>==</span> <span class='varid'>fst</span> <span class='varid'>y</span>
<a name="line-371"></a> <span class='varid'>cmp</span> <span class='varid'>x</span> <span class='varid'>y</span> <span class='keyglyph'>=</span> <span class='varid'>compare</span> <span class='layout'>(</span><span class='varid'>fst</span> <span class='varid'>x</span><span class='layout'>)</span> <span class='layout'>(</span><span class='varid'>fst</span> <span class='varid'>y</span><span class='layout'>)</span>
<a name="line-372"></a> <span class='varid'>compress</span> <span class='keyglyph'>=</span> <span class='layout'>(</span><span class='varid'>head</span> <span class='varop'>***</span> <span class='varid'>unionExpr</span><span class='layout'>)</span> <span class='varop'>.</span> <span class='varid'>unzip</span>
<a name="line-373"></a>
<a name="line-374"></a><a name="computePriority"></a><span class='definition'>computePriority</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='conid'>Float</span>
<a name="line-375"></a><span class='definition'>computePriority</span> <span class='layout'>(</span><span class='conid'>PathExpr</span> <span class='conid'>Nothing</span> <span class='layout'>(</span><span class='conid'>Just</span> <span class='layout'>(</span><span class='conid'>LocPath</span> <span class='conid'>Rel</span> <span class='keyglyph'>[</span><span class='conid'>Step</span> <span class='keyword'>_</span> <span class='varid'>ntest</span> <span class='conid'>[]</span><span class='keyglyph'>]</span><span class='layout'>)</span><span class='layout'>)</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>computeNTestPriority</span> <span class='varid'>ntest</span>
<a name="line-376"></a><span class='definition'>computePriority</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='num'>0.5</span>
<a name="line-377"></a>
<a name="line-378"></a><a name="computeNTestPriority"></a><span class='definition'>computeNTestPriority</span> <span class='keyglyph'>::</span> <span class='conid'>NodeTest</span> <span class='keyglyph'>-></span> <span class='conid'>Float</span>
<a name="line-379"></a><span class='definition'>computeNTestPriority</span> <span class='layout'>(</span><span class='conid'>PI</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='num'>0.0</span>
<a name="line-380"></a><span class='definition'>computeNTestPriority</span> <span class='layout'>(</span><span class='conid'>TypeTest</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='comment'>-</span><span class='num'>0.5</span>
<a name="line-381"></a><span class='definition'>computeNTestPriority</span> <span class='layout'>(</span><span class='conid'>NameTest</span> <span class='varid'>nt</span><span class='layout'>)</span>
<a name="line-382"></a> <span class='keyglyph'>|</span> <span class='varid'>namePrefix</span> <span class='varid'>nt</span> <span class='varop'>/=</span> <span class='str'>""</span>
<a name="line-383"></a> <span class='varop'>&&</span> <span class='varid'>localPart</span> <span class='varid'>nt</span> <span class='varop'>==</span> <span class='str'>"*"</span> <span class='keyglyph'>=</span> <span class='comment'>-</span><span class='num'>0.25</span>
<a name="line-384"></a> <span class='keyglyph'>|</span> <span class='varid'>localPart</span> <span class='varid'>nt</span> <span class='varop'>==</span> <span class='str'>"*"</span> <span class='keyglyph'>=</span> <span class='comment'>-</span><span class='num'>0.5</span>
<a name="line-385"></a> <span class='keyglyph'>|</span> <span class='varid'>otherwise</span> <span class='keyglyph'>=</span> <span class='num'>0.0</span>
<a name="line-386"></a>
<a name="line-387"></a><a name="isMatchExpr"></a><span class='definition'>isMatchExpr</span> <span class='keyglyph'>::</span> <span class='conid'>Expr</span> <span class='keyglyph'>-></span> <span class='conid'>Bool</span>
<a name="line-388"></a><span class='definition'>isMatchExpr</span> <span class='layout'>(</span><span class='conid'>GenExpr</span> <span class='conid'>Union</span> <span class='varid'>exprs</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='varid'>all</span> <span class='varid'>isMatchExpr</span> <span class='varid'>exprs</span>
<a name="line-389"></a><span class='definition'>isMatchExpr</span> <span class='layout'>(</span><span class='conid'>PathExpr</span> <span class='keyword'>_</span> <span class='keyword'>_</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-390"></a><span class='definition'>isMatchExpr</span> <span class='layout'>(</span><span class='conid'>FctExpr</span> <span class='str'>"id"</span> <span class='keyglyph'>[</span><span class='conid'>LiteralExpr</span> <span class='keyword'>_</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-391"></a><span class='definition'>isMatchExpr</span> <span class='layout'>(</span><span class='conid'>FctExpr</span> <span class='str'>"key"</span> <span class='keyglyph'>[</span><span class='conid'>LiteralExpr</span> <span class='keyword'>_</span><span class='layout'>,</span> <span class='conid'>LiteralExpr</span> <span class='keyword'>_</span><span class='keyglyph'>]</span><span class='layout'>)</span> <span class='keyglyph'>=</span> <span class='conid'>True</span>
<a name="line-392"></a><span class='definition'>isMatchExpr</span> <span class='keyword'>_</span> <span class='keyglyph'>=</span> <span class='conid'>False</span>
<a name="line-393"></a>
<a name="line-394"></a><span class='comment'>--------------------------- </span>
<a name="line-395"></a><span class='comment'>-- Misc:</span>
<a name="line-396"></a>
<a name="line-397"></a><a name="fromJustErr"></a><span class='definition'>fromJustErr</span> <span class='keyglyph'>::</span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='conid'>Maybe</span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='varid'>a</span>
<a name="line-398"></a><span class='definition'>fromJustErr</span> <span class='varid'>msg</span> <span class='keyglyph'>=</span> <span class='varid'>maybe</span> <span class='layout'>(</span><span class='varid'>error</span> <span class='varid'>msg</span><span class='layout'>)</span> <span class='varid'>id</span>
<a name="line-399"></a>
<a name="line-400"></a><a name="readWDefault"></a><span class='definition'>readWDefault</span> <span class='keyglyph'>::</span> <span class='conid'>Read</span> <span class='varid'>a</span> <span class='keyglyph'>=></span> <span class='varid'>a</span> <span class='keyglyph'>-></span> <span class='conid'>String</span> <span class='keyglyph'>-></span> <span class='varid'>a</span>
<a name="line-401"></a><span class='definition'>readWDefault</span> <span class='varid'>a</span> <span class='varid'>str</span> <span class='keyglyph'>=</span> <span class='varid'>fst</span> <span class='varop'>$</span> <span class='varid'>head</span> <span class='varop'>$</span> <span class='varid'>reads</span> <span class='varid'>str</span> <span class='varop'>++</span> <span class='keyglyph'>[</span><span class='layout'>(</span><span class='varid'>a</span><span class='layout'>,</span> <span class='str'>""</span><span class='layout'>)</span><span class='keyglyph'>]</span>
<a name="line-402"></a>
<a name="line-403"></a><span class='comment'>--------------------------- </span>
</pre></body>
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