Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

fixes #471 #745

Merged
merged 4 commits into from
Jan 10, 2020
Merged

fixes #471 #745

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
7948175
checks if RegExp[Symbol.replace] substitutes undefined capture groups
Jan 9, 2020
3bfe93c
use wellKnownSymbol util to get symbol key for replace method
Jan 9, 2020
e0a3d42
fixes REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE conditional logic
Jan 9, 2020
c7429d1
caches Symbol.replace as constant, uses regexp literal, swaps default…
Jan 10, 2020
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
20 changes: 18 additions & 2 deletions packages/core-js/internals/fix-regexp-well-known-symbol-logic.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,15 @@ var REPLACE_KEEPS_$0 = (function () {
return 'a'.replace(/./, '$0') === '$0';
})();

var REPLACE = wellKnownSymbol('replace');
// Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
if (/./[REPLACE]) {
return /./[REPLACE]('a', '$0') === '';
}
return false;
})();

// Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
// Weex JS has frozen built-in prototypes, so use try / catch wrapper
var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {
Expand Down Expand Up @@ -75,7 +84,11 @@ module.exports = function (KEY, length, exec, sham) {
if (
!DELEGATES_TO_SYMBOL ||
!DELEGATES_TO_EXEC ||
(KEY === 'replace' && !(REPLACE_SUPPORTS_NAMED_GROUPS && REPLACE_KEEPS_$0)) ||
(KEY === 'replace' && !(
REPLACE_SUPPORTS_NAMED_GROUPS &&
REPLACE_KEEPS_$0 &&
REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
Copy link
Owner

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Other criteria mean that the implementation is correct, but REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE that it's buggy, so seem it should be !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE.

)) ||
(KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)
) {
var nativeRegExpMethod = /./[SYMBOL];
Expand All @@ -90,7 +103,10 @@ module.exports = function (KEY, length, exec, sham) {
return { done: true, value: nativeMethod.call(str, regexp, arg2) };
}
return { done: false };
}, { REPLACE_KEEPS_$0: REPLACE_KEEPS_$0 });
}, {
REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,
REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
});
var stringMethod = methods[0];
var regexMethod = methods[1];

Expand Down
5 changes: 4 additions & 1 deletion packages/core-js/modules/es.string.replace.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,10 @@ fixRegExpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, ma
// `RegExp.prototype[@@replace]` method
// https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
function (regexp, replaceValue) {
if (reason.REPLACE_KEEPS_$0 || (typeof replaceValue === 'string' && replaceValue.indexOf('$0') === -1)) {
if (
!reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE &&
(reason.REPLACE_KEEPS_$0 || (typeof replaceValue === 'string' && replaceValue.indexOf('$0') === -1))
) {
var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);
if (res.done) return res.value;
}
Expand Down