25312 2014-04-10 17:30:07 +0000 allow trailing commas on enums 2015-01-07 08:45:10 +0000 1 1 1 Unclassified WebAppsWG WebIDL unspecified PC All RESOLVED WORKSFORME P2 normal --- 1 ian cam bzbarsky contributor ian mike public-script-coord public-webapps-bugzilla oldest_to_newest 103687 0 ian 2014-04-10 17:30:07 +0000 http://heycam.github.io/webidl/#proddef-EnumValueListComma The Enum production should allow trailing commas, for ease of maintenance. 103689 1 bzbarsky 2014-04-10 17:52:59 +0000 Uh.. this already works. It was fixed in bug 17508. Here's an example. Say you have: enum Foo { "foo", } The tokenizer sees the '{', then expects an EnumValueList. EnumValueList → string EnumValueListComma The tokenizer sees the string "foo", then expects EnumValueListComma. EnumValueListComma → "," EnumValueListString | ε The tokenizer sees a ',', then expects EnumValueListString EnumValueListString → string EnumValueListComma | ε The tokenizer doesn't see a string, but EnumValueListString is allowed to be empty so we match all that, go back to our Enum production, see the expected '}', and all is good. 105079 2 ian 2014-05-05 21:13:58 +0000 Hm, dunno how I missed those | ε bits. Nevermind! 116880 3 annevk 2015-01-07 08:45:10 +0000 *** Bug 27701 has been marked as a duplicate of this bug. ***