Note that since this is a V8/JS feature, this post is just an FYI to blink-dev — no signoff from Blink API owners is required.
On Thu, Nov 9, 2017 at 10:29 PM, Mathias Bynens <math...@chromium.org> wrote: > Contact emails > > yang...@chromium.org, math...@chromium.org > > Spec > > https://github.com/tc39/proposal-regexp-unicode-property-escapes (stage 3 > proposal) > > Summary > > The Unicode Standard assigns various properties and property values to > every symbol. For example, to get the set of symbols that are used > exclusively in the Greek script, search the Unicode database for symbols > whose Script property is set to Greek. > > Unicode property escapes are a new type of escape sequence available in > regular expressions that have the u flag set. They enable querying the > Unicode database for certain properties and values. > > E.g. /\p{Script=Greek}/u.test('π') === true > > Link to “Intent to Implement” blink-dev discussion > > There was none. > > Is this feature supported on all six Blink platforms (Windows, Mac, Linux, > Chrome OS, Android, and Android WebView)? > > Yes. > > Demo link > > None. The explainer in the proposal offers some examples. > > Interoperability and Compatibility Risk > > In regular expressions without the u flag, the pattern \p is an > (unnecessary) escape sequence for p. Patterns of the form \p{Letter} > might already be present in existing regular expressions without the u > flag, and therefore we cannot assign new meaning to such patterns without > breaking backwards compatibility. > > For this reason, ECMAScript 2015 made unnecessary escape sequences like \p > and \P throw an exception when the u flag is set. This enables us to > change the meaning of \p{…} and \P{…} in regular expressions with the u > flag without breaking backwards compatibility. > > > - > > Edge/Chakra: public support; tracking issue: > https://github.com/Microsoft/ChakraCore/issues/2969 > <https://github.com/Microsoft/ChakraCore/issues/2969> > - > > Firefox/SpiderMonkey: public support; tracking issue: > https://bugzilla.mozilla.org/show_bug.cgi?id=1361876 > <https://bugzilla.mozilla.org/show_bug.cgi?id=1361876> > - > > Safari/JavaScriptCore: shipped in Safari Technical Preview 42; > tracking issue: https://bugs.webkit.org/show_bug.cgi?id=172069 > - > > Web developers: positive signals > > > Is this feature fully tested? > > Yes. In addition to V8’s own tests (v8/test/mjsunit/harmony/regex > p-property-*.js), Test262 includes tests for this feature > <https://github.com/tc39/test262/tree/master/test/built-ins/RegExp/property-escapes> > . > > OWP launch tracking bug > > https://bugs.chromium.org/p/v8/issues/detail?id=4743 > > Entry on the feature dashboard <http://www.chromestatus.com/> > > https://www.chromestatus.com/features/6706900393525248 > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
