| // Copyright 2018 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Named groups can be used in conjunction with lookbehind |
| esid: prod-GroupSpecifier |
| features: [regexp-named-groups, regexp-lookbehind] |
| includes: [compareArray.js] |
| ---*/ |
| |
| // Unicode mode |
| assert.compareArray(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/u)); |
| assert.sameValue("c", "abcdef".match(/(?<=(?<a>\w){3})f/u).groups.a); |
| assert.sameValue("b", "abcdef".match(/(?<=(?<a>\w){4})f/u).groups.a); |
| assert.sameValue("a", "abcdef".match(/(?<=(?<a>\w)+)f/u).groups.a); |
| assert.sameValue(null, "abcdef".match(/(?<=(?<a>\w){6})f/u)); |
| |
| assert.compareArray(["f", ""], "abcdef".match(/((?<=\w{3}))f/u)); |
| assert.compareArray(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/u)); |
| |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/u)); |
| assert.sameValue(null, "abcdef".match(/(?<!(?<a>\D){3})f/u)); |
| |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/u)); |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/u)); |
| |
| // Non-Unicode mode |
| assert.compareArray(["f", "c"], "abcdef".match(/(?<=(?<a>\w){3})f/)); |
| assert.sameValue("c", "abcdef".match(/(?<=(?<a>\w){3})f/).groups.a); |
| assert.sameValue("b", "abcdef".match(/(?<=(?<a>\w){4})f/).groups.a); |
| assert.sameValue("a", "abcdef".match(/(?<=(?<a>\w)+)f/).groups.a); |
| assert.sameValue(null, "abcdef".match(/(?<=(?<a>\w){6})f/)); |
| |
| assert.compareArray(["f", ""], "abcdef".match(/((?<=\w{3}))f/)); |
| assert.compareArray(["f", ""], "abcdef".match(/(?<a>(?<=\w{3}))f/)); |
| |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\d){3})f/)); |
| assert.sameValue(null, "abcdef".match(/(?<!(?<a>\D){3})f/)); |
| |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<!(?<a>\D){3})f|f/)); |
| assert.compareArray(["f", undefined], "abcdef".match(/(?<a>(?<!\D{3}))f|f/)); |
| |
| // Even within a lookbehind, properties are created in left to right order |
| assert.compareArray(["fst", "snd"], Object.getOwnPropertyNames( |
| /(?<=(?<fst>.)|(?<snd>.))/u.exec("abcd").groups)); |