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Direktori : /proc/985914/root/www/varak.net/wiki.varak.net/resources/src/mediawiki/
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Current File : //proc/985914/root/www/varak.net/wiki.varak.net/resources/src/mediawiki/mediawiki.jqueryMsg.peg

/* 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) }
  / twr:templateWithOutReplacement p:templateParam* { return twr.concat(p) }
  / twr:templateWithOutFirstParameter p:templateParam* { return twr.concat(p) }
  / t:templateName p:templateParam* { return p.length ? [ t, p ] : [ t ] }

templateWithReplacement
  = t:templateName ":" r:replacement { return [ t, r ] }

templateWithOutReplacement
  = t:templateName ":" p:paramExpression { return [ t, p ] }

templateWithOutFirstParameter
  = t:templateName ":" { return [ t, "" ] }

templateParam
  = "|" e:paramExpression* { return e.length > 1 ? [ "CONCAT" ].concat(e) : e[0]; }

templateName
  = tn:[A-Za-z_]+ { return tn.join('').toUpperCase() }

/* TODO: Update to reflect separate piped and unpiped handling */
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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