start-of-line.js (2177B)
1 // Copyright (C) 2017 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 esid: sec-assertion 6 description: Start of line matches 7 info: | 8 The production Assertion :: (?<=Disjunction) evaluates as follows: 9 1. Evaluate Disjunction with -1 as its direction argument to obtain a Matcher m. 10 2. Return an internal Matcher closure that takes two arguments, a State x and a Continuation 11 c, and performs the following steps: 12 a. Let d be a Continuation that always returns its State argument as a successful MatchResult. 13 b. Call m(x, d) and let r be its result. 14 c. If r is failure, return failure. 15 d. Let y be r's State. 16 e. Let cap be y's captures List. 17 f. Let xe be x's endIndex. 18 g. Let z be the State (xe, cap). 19 h. Call c(z) and return its result. 20 features: [regexp-lookbehind] 21 includes: [compareArray.js] 22 ---*/ 23 24 assert.sameValue("abcdef".match(/(?<=^[^a-c]{3})def/), null, "#1"); 25 assert.sameValue("foooo".match(/"^foooo(?<=^o+)$/), null, "#2"); 26 assert.sameValue("foooo".match(/"^foooo(?<=^o*)$/), null, "#3"); 27 28 assert.compareArray("abcdef".match(/(?<=^abc)def/), ["def"], "#4"); 29 assert.compareArray("abcdef".match(/(?<=^[a-c]{3})def/), ["def"], "#5"); 30 assert.compareArray("xyz\nabcdef".match(/(?<=^[a-c]{3})def/m), ["def"], "#6"); 31 assert.compareArray("ab\ncd\nefg".match(/(?<=^)\w+/gm), ["ab", "cd", "efg"], "#7"); 32 assert.compareArray("ab\ncd\nefg".match(/\w+(?<=$)/gm), ["ab", "cd", "efg"], "#8"); 33 assert.compareArray("ab\ncd\nefg".match(/(?<=^)\w+(?<=$)/gm), ["ab", "cd", "efg"], "#9"); 34 35 assert.compareArray("foo".match(/^foo(?<=^fo+)$/), ["foo"], "#10"); 36 assert.compareArray("foooo".match(/^foooo(?<=^fo*)/), ["foooo"], "#11"); 37 assert.compareArray("foo".match(/^(f)oo(?<=^\1o+)$/), ["foo", "f"], "#12"); 38 assert.compareArray("foo".match(/^(f)oo(?<=^\1o+)$/i), ["foo", "f"], "#13"); 39 assert.compareArray("foo\u1234".match(/^(f)oo(?<=^\1o+).$/i), ["foo\u1234", "f"], "#14"); 40 assert.compareArray("abcdefdef".match(/(?<=^\w+)def/), ["def"], "#15"); 41 assert.compareArray("abcdefdef".match(/(?<=^\w+)def/g), ["def", "def"], "#16"); 42 43 reportCompare(0, 0);