Specification is not clear about metadata before enums

[alsemenov]

The Dart Programming Language Specification version 1.9 is not clear about metadata for enums.
Chapter '13 Enums' reads:

An enumerated type, or enum, is used to represent a fixed number of constant values.
enumType:
metadata enum id ‘{’ id [‘, ’ id]* [‘, ’] ‘}’
;

Metadata is allowed. But chapter '15 Metadata' reads:

Metadata can appear before a library, part header, class, typedef, type pa-
rameter, constructor, factory, function, field, parameter, or variable declaration
and before an import, export or part directive.

Enums are not mentioned here, i.e. not allowed for enums.
So it is not clear whether metadata can appear before enum or not.

[eernstg]

No milestone now: Said correction should be performed (add enums in ch. 15), but this does not block Dart 2.

[eernstg]

Noted that this had been reported already in dart-lang/language#3773. Closing this issue as a duplicate of that one.