LGTM (for v8 signoff purposes). On Thu, Nov 9, 2017 at 1:38 PM, 'Mathias Bynens' via blink-dev < [email protected]> wrote:
> 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 <[email protected]> > wrote: > >> Contact emails >> >> [email protected], [email protected] >> >> 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 >> > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To view this discussion on the web visit https://groups.google.com/a/ > chromium.org/d/msgid/blink-dev/CADizRgbnTY1wLi6ZrF4_w74- > PyZSgZgUruJrP4Q6-O1i5t6aMg%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADizRgbnTY1wLi6ZrF4_w74-PyZSgZgUruJrP4Q6-O1i5t6aMg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- -- v8-users mailing list [email protected] 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
