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Fixing character set ranges

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Certain escape sequences are not considered in ranges, and lead to the
hyphen to be part of the matched set of characters
This commit is contained in:
Jeff Avallone 2014-12-22 16:09:27 -05:00
parent d882ee8e08
commit b35dece228
2 changed files with 31 additions and 3 deletions
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15
spec/parser/javascript/charset_range_spec.js
View File

@ -1,6 +1,7 @@
import javascript from 'src/js/parser/javascript/parser.js';
import util from 'src/js/util.js';
import Q from 'q';
import _ from 'lodash';
describe('parser/javascript/charset_range.js', function() {
@ -17,6 +18,20 @@ describe('parser/javascript/charset_range.js', function() {
}));
});
_.each([
'\\d-a',
'\\D-a',
'\\s-a',
'\\S-a',
'\\w-a',
'\\W-a'
], str => {
it(`does not parse "${str}" as a CharsetRange`, function() {
var parser = new javascript.Parser(str);
expect(parser.__consume__charset_range()).toEqual(null);
});
});
it('throws an exception when the range is out of order', function() {
var parser = new javascript.Parser('z-a');
expect(() => {

19
src/js/parser/javascript/grammar.peg
View File

@ -17,9 +17,11 @@ grammar JavascriptRegexp
subexp_positive_lookahead <- "?="
subexp_negative_lookahead <- "?!"
charset <- "[" invert:"^"? parts:( charset_range / charset_terminal )* "]" <Charset>
charset_range <- first:charset_terminal "-" last:charset_terminal <CharsetRange>
charset_range <- first:charset_range_terminal "-" last:charset_range_terminal <CharsetRange>
charset_terminal <- charset_escape <CharsetEscape>
/ charset_literal <Literal>
charset_range_terminal <- charset_range_escape <CharsetEscape>
/ charset_literal <Literal>
charset_escape <- "\\" esc:(
code:[bdDfnrsStvwW] arg:""?
/ code:"c" arg:[a-zA-Z]
@ -27,7 +29,16 @@ grammar JavascriptRegexp
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] )
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] )
/ code:"0" arg:""? )
charset_literal <- ( ""? literal:[^\\\]] ) / ( literal:"\\" &"c" ) / ( "\\" literal:. )
charset_range_escape <- "\\" esc:(
code:[bfnrtv] arg:""?
/ code:"c" arg:[a-zA-Z]
/ code:"0" arg:[0-7]+
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] )
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] )
/ code:"0" arg:""? )
charset_literal <- ( ""? literal:[^\\\]] )
/ ( literal:"\\" &"c" )
/ ( "\\" literal:[^bdDfnrsStvwW] )
terminal <- "." <AnyCharacter>
/ escape <Escape>
/ literal <Literal>
@ -38,4 +49,6 @@ grammar JavascriptRegexp
/ code:"x" arg:( [0-9a-fA-F] [0-9a-fA-F] )
/ code:"u" arg:( [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] [0-9a-fA-F] )
/ code:"0" arg:""? )
literal <- ( ""? literal:[^|\\/.\[\(\)?+*$^] ) / ( literal:"\\" &"c" ) / ( "\\" literal:. )
literal <- ( ""? literal:[^|\\/.\[\(\)?+*$^] )
/ ( literal:"\\" &"c" )
/ ( "\\" literal:. )