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Reducing duplication in grammar

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This commit is contained in:
Jeff Avallone 2014-12-22 16:26:08 -05:00
parent 281ca50d32
commit 9e6f066763
1 changed files with 21 additions and 15 deletions
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36
src/js/parser/javascript/grammar.peg
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@ -24,18 +24,18 @@ grammar JavascriptRegexp
/ charset_literal <Literal> / charset_literal <Literal>
charset_escape <- "\\" esc:( charset_escape <- "\\" esc:(
code:[bdDfnrsStvwW] arg:""? code:[bdDfnrsStvwW] arg:""?
/ code:"c" arg:[a-zA-Z] / control_escape
/ code:"0" arg:[0-7]+ / octal_escape
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] ) / hex_escape
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] ) / unicode_escape
/ code:"0" arg:""? ) / null_escape )
charset_range_escape <- "\\" esc:( charset_range_escape <- "\\" esc:(
code:[bfnrtv] arg:""? code:[bfnrtv] arg:""?
/ code:"c" arg:[a-zA-Z] / control_escape
/ code:"0" arg:[0-7]+ / octal_escape
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] ) / hex_escape
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] ) / unicode_escape
/ code:"0" arg:""? ) / null_escape )
charset_literal <- ( ""? literal:[^\\\]] ) charset_literal <- ( ""? literal:[^\\\]] )
/ ( literal:"\\" &"c" ) / ( literal:"\\" &"c" )
/ ( "\\" literal:[^bdDfnrsStvwW] ) / ( "\\" literal:[^bdDfnrsStvwW] )
@ -44,11 +44,17 @@ grammar JavascriptRegexp
/ literal <Literal> / literal <Literal>
escape <- "\\" esc:( escape <- "\\" esc:(
code:[bBdDfnrsStvwW1-9] arg:""? code:[bBdDfnrsStvwW1-9] arg:""?
/ code:"c" arg:[a-zA-Z] / control_escape
/ code:"0" arg:[0-7]+ / octal_escape
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] ) / hex_escape
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] ) / unicode_escape
/ code:"0" arg:""? ) / null_escape )
literal <- ( ""? literal:[^|\\/.\[\(\)?+*$^] ) literal <- ( ""? literal:[^|\\/.\[\(\)?+*$^] )
/ ( literal:"\\" &"c" ) / ( literal:"\\" &"c" )
/ ( "\\" literal:. ) / ( "\\" literal:. )
control_escape <- code:"c" arg:[a-zA-Z]
octal_escape <- code:"0" arg:[0-7]+
hex_escape <- code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] )
unicode_escape <- code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] )
null_escape <- code:"0" arg:""?