LGTM1 - looks like a useful addition already supported in a number of
other RegExp engines.
On 3/27/24 11:38 AM, 'Shu-yu Guo' via blink-dev wrote:
Contact emails
s...@chromium.org, pth...@chromium.org
Explainer
None
Specification
https://tc39.es/proposal-regexp-modifiers
Summary
RegExp modifiers adds the ability to locally modify the 'i', 'm', and
's' flags inside a pattern. To enable a flag for a subexpression, use
`(?X:subexpr)` where X is one of 'i', 'm', or 's'. To disable a flag
for a subexpression, use `(-X:subexpr)`. For example, for the
case-insensitivity 'i' flag: ``` const re1 = /^[a-z](?-i:[a-z])$/i;
re1.test("ab"); // true re1.test("Ab"); // true re1.test("aB"); //
false const re2 = /^(?i:[a-z])[a-z]$/; re2.test("ab"); // true
re2.test("Ab"); // true re2.test("aB"); // false ```
Blink component
Blink>JavaScript>Regexp
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EJavaScript%3ERegexp>
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
No interoperability risk. This is a Stage 3 TC39 proposal.
/Gecko/: Positive TC39 Stage 3
/WebKit/: Positive TC39 Stage 3
/Web developers/: No signals
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
None
Debuggability
No special needs. JS RegExps already debuggable.
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
Yes
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
In test262: https://github.com/tc39/test262/pull/3960
Flag name on chrome://flags
--js-regexp-modifiers
Finch feature name
JavaScriptRegExpModifiers
Requires code in //chrome?
False
Estimated milestones
DevTrial on desktop 122
DevTrial on Android 122
Anticipated spec changes
Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github
issues in the project for the feature specification) whose resolution
may introduce web compat/interop risk (e.g., changing to naming or
structure of the API in a non-backward-compatible way).
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5100254548721664
This intent message was generated by Chrome Platform Status
<https://chromestatus.com/>.
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