http://www.mediawiki.org/wiki/Special:Code/MediaWiki/83625
Revision: 83625
Author: neilk
Date: 2011-03-10 01:34:39 +0000 (Thu, 10 Mar 2011)
Log Message:
-----------
PEG grammar that mediawiki.language.parser is based on
Added Paths:
-----------
trunk/extensions/UploadWizard/resources/mediawiki.language.parser.peg
Added: trunk/extensions/UploadWizard/resources/mediawiki.language.parser.peg
===================================================================
--- trunk/extensions/UploadWizard/resources/mediawiki.language.parser.peg
(rev 0)
+++ trunk/extensions/UploadWizard/resources/mediawiki.language.parser.peg
2011-03-10 01:34:39 UTC (rev 83625)
@@ -0,0 +1,76 @@
+/* PEG grammar for a subset of wikitext, useful in the MediaWiki frontend */
+
+start
+ = e:expression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }
+
+expression
+ = template
+ / link
+ / extlink
+ / replacement
+ / literal
+
+paramExpression
+ = template
+ / link
+ / extlink
+ / replacement
+ / literalWithoutBar
+
+template
+ = "{{" t:templateContents "}}" { return t; }
+
+templateContents
+ = twr:templateWithReplacement p:templateParam* { return twr.concat(p) }
+ / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }
+
+templateWithReplacement
+ = t:templateName ":" r:replacement { return [ t, r ] }
+
+templateParam
+ = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) :
e[0]; }
+
+templateName
+ = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }
+
+link
+ = "[[" w:expression "]]" { return [ 'WLINK', w ]; }
+
+extlink
+ = "[" url:url whitespace text:expression "]" { return [ 'LINK', url, text ] }
+
+url
+ = url:[^ ]+ { return url.join(''); }
+
+whitespace
+ = [ ]+
+
+replacement
+ = '$' digits:digits { return [ 'REPLACE', parseInt( digits, 10 ) - 1 ] }
+
+digits
+ = [0-9]+
+
+literal
+ = lit:escapedOrRegularLiteral+ { return lit.join(''); }
+
+literalWithoutBar
+ = lit:escapedOrLiteralWithoutBar+ { return lit.join(''); }
+
+escapedOrRegularLiteral
+ = escapedLiteral
+ / regularLiteral
+
+escapedOrLiteralWithoutBar
+ = escapedLiteral
+ / regularLiteralWithoutBar
+
+escapedLiteral
+ = "\\" escaped:. { return escaped; }
+
+regularLiteral
+ = [^{}\[\]$\\]
+
+regularLiteralWithoutBar
+ = [^{}\[\]$\\|]
+
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