en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/SemaCXX/enum-attr.cpp#3c268af4 Add support for attribute enum_extensibility.This commit adds support for a new attribute that will be used todistinguish between extensible and inextensible enums. There are threemain purposes of this attribute:1. Give better control over when enum-related warnings are issued.For example, in the code below, clang will not issue a -Wassign-enumwarning if the enum is marked "open":enum __attribute__((enum_extensibility(closed))) EnumClosed { B0 = 1, B1 = 10};enum __attribute__((enum_extensibility(open))) EnumOpen { C0 = 1, C1 = 10};enum EnumClosed ec = 100; // warning issuedenum EnumOpen eo = 100; // no warning2. Enable code-completion and debugging tools to offer bettersuggestions.3. Make it easier for swift's clang importer to determine which swifttype an enum should be mapped to.For more details, see the discussion I started on cfe-dev:http://lists.llvm.org/pipermail/cfe-dev/2017-February/052748.htmlrdar://problem/12764379rdar://problem/23145650Differential Revision: https://reviews.llvm.org/D30766llvm-svn: 298332 List of files: /llvm-project-15.0.7/clang/test/SemaCXX/enum-attr.cpp Tue, 21 Mar 2017 02:23:00 +0000 Akira Hatanaka <ahatanaka@apple.com>