| // Copyright (C) 2017 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-assertion |
| description: Back references |
| info: | |
| The production Assertion :: (?<=Disjunction) evaluates as follows: |
| 1. Evaluate Disjunction with -1 as its direction argument to obtain a Matcher m. |
| 2. Return an internal Matcher closure that takes two arguments, a State x and a Continuation |
| c, and performs the following steps: |
| a. Let d be a Continuation that always returns its State argument as a successful MatchResult. |
| b. Call m(x, d) and let r be its result. |
| c. If r is failure, return failure. |
| d. Let y be r's State. |
| e. Let cap be y's captures List. |
| f. Let xe be x's endIndex. |
| g. Let z be the State (xe, cap). |
| h. Call c(z) and return its result. |
| features: [regexp-lookbehind] |
| includes: [compareArray.js] |
| ---*/ |
| |
| assert.compareArray("abb".match(/(.)(?<=(\1\1))/), ["b", "b", "bb"], "#1"); |
| assert.compareArray("abB".match(/(.)(?<=(\1\1))/i), ["B", "B", "bB"], "#2"); |
| assert.compareArray("aabAaBa".match(/((\w)\w)(?<=\1\2\1)/i), ["aB", "aB", "a"], "#3"); |
| assert.compareArray("aabAaBa".match(/(\w(\w))(?<=\1\2\1)/i), ["Ba", "Ba", "a"], "#4"); |
| assert.compareArray("abaBbAa".match(/(?=(\w))(?<=(\1))./i), ["b", "b", "B"], "#5"); |
| assert.compareArray(" 'foo' ".match(/(?<=(.))(\w+)(?=\1)/), ["foo", "'", "foo"], "#6"); |
| assert.compareArray(" \"foo\" ".match(/(?<=(.))(\w+)(?=\1)/), ["foo", "\"", "foo"], "#7"); |
| assert.compareArray("abbb".match(/(.)(?<=\1\1\1)/), ["b", "b"], "#8"); |
| assert.compareArray("fababab".match(/(..)(?<=\1\1\1)/), ["ab", "ab"], "#9"); |
| |
| assert.sameValue(" .foo\" ".match(/(?<=(.))(\w+)(?=\1)/), null, "#10"); |
| assert.sameValue("ab".match(/(.)(?<=\1\1\1)/), null, "#11"); |
| assert.sameValue("abb".match(/(.)(?<=\1\1\1)/), null, "#12"); |
| assert.sameValue("ab".match(/(..)(?<=\1\1\1)/), null, "#13"); |
| assert.sameValue("abb".match(/(..)(?<=\1\1\1)/), null, "#14"); |
| assert.sameValue("aabb".match(/(..)(?<=\1\1\1)/), null, "#15"); |
| assert.sameValue("abab".match(/(..)(?<=\1\1\1)/), null, "#16"); |
| assert.sameValue("fabxbab".match(/(..)(?<=\1\1\1)/), null, "#17"); |
| assert.sameValue("faxabab".match(/(..)(?<=\1\1\1)/), null, "#18"); |
| |