en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/clang/test/SemaCXX/cxx20-using-enum.cpp#b2d0c16e [clang] p1099 using enum part 2This implements the 'using enum maybe-qualified-enum-tag ;' part of1099. It introduces a new 'UsingEnumDecl', subclassed from'BaseUsingDecl'. Much of the diff is the boilerplate needed to get thenew class set up.There is one case where we accept ill-formed, but I believe this ismerely an extended case of an existing bug, so consider itorthogonal. AFAICT in class-scope the c++20 rule is that no 2 usingdecls can bring in the same target decl ([namespace.udecl]/8). But wealready accept:struct A { enum { a }; };struct B : A { using A::a; };struct C : B { using A::a;using B::a; }; // same enumeratorthis patch permits mixtures of 'using enum Bob;' and 'using Bob::member;' in the same way.Differential Revision: https://reviews.llvm.org/D102241 List of files: /llvm-project-15.0.7/clang/test/SemaCXX/cxx20-using-enum.cpp Wed, 05 May 2021 15:55:02 +0000 Nathan Sidwell <nathan@acm.org>