David L. Jones f55ce36c02 Allow constexpr construction of subobjects unconditionally, not just in C++14. ... Summary: Per https://wg21.link/CWG1677, the C++11 standard did not clarify that constant initialization of an object allowed constexpr brace-or-equal initialization of subobjects: struct foo_t { union { int i; volatile int j; } u; }; __attribute__((__require_constant_initialization__)) static const foo_t x = {{0}}; Because foo_t::u has a volatile member, the initializer for x fails. However, there is really no good reason, because this: union foo_u { int i; volatile int j; }; __attribute__((__require_constant_initialization__)) static const foo_u x = {0}; does have a constant initializer. (This was triggered by musl's pthread_mutex_t type when building under C++11.) Reviewers: rsmith Subscribers: EricWF, cfe-commits Differential Revision: https://reviews.llvm.org/D28427 llvm-svn: 291480		2017-01-09 21:38:07 +00:00
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basic.start.init	Allow constexpr construction of subobjects unconditionally, not just in C++14.	2017-01-09 21:38:07 +00:00
basic.start.main	…