| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: > |
| Behavior when error thrown while setting `lastIndex` after a "global" match |
| success |
| es6id: 21.2.5.6 |
| info: | |
| [...] |
| 5. Let global be ToBoolean(Get(rx, "global")). |
| 6. ReturnIfAbrupt(global). |
| 7. If global is false, then |
| a. Return RegExpExec(rx, S). |
| |
| 21.2.5.2.1 Runtime Semantics: RegExpExec ( R, S ) |
| |
| [...] |
| 7. Return RegExpBuiltinExec(R, S). |
| |
| 21.2.5.2.2 Runtime Semantics: RegExpBuiltinExec ( R, S ) |
| |
| [...] |
| 18. If global is true or sticky is true, |
| a. Let setStatus be Set(R, "lastIndex", e, true). |
| b. ReturnIfAbrupt(setStatus). |
| features: [Symbol.match] |
| ---*/ |
| |
| var r = /b/g; |
| var callCount = 0; |
| |
| // Because this test speicifically concerns the behavior when setting |
| // "lastIndex" following a match, care must be taken to avoid triggering a |
| // similar error when `lastIndex` is initially set to `0` earlier in the |
| // algorithm. |
| // |
| // Because the `lastIndex` property is non-configurable, this cannot be |
| // accomplished with a simple "set" accessor function. |
| // |
| // Defer disabling modification of `lastIndex` until after the "this" value's |
| // `exec` property has been accessed, ensuring that the resultant abrupt |
| // completion originates from the second property modification. |
| Object.defineProperty(r, 'exec', { |
| get: function() { |
| Object.defineProperty(r, 'lastIndex', { writable: false }); |
| } |
| }); |
| |
| assert.throws(TypeError, function() { |
| r[Symbol.match]('abc'); |
| }); |