forked from OSchip/llvm-project
f55ce36c02
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 |
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| .. | ||
| basic | ||
| class | ||
| class.access | ||
| class.derived | ||
| concepts-ts/dcl.dcl/dcl.spec/dcl.spec.concept | ||
| conv | ||
| cpp/cpp.predefined | ||
| dcl.dcl | ||
| dcl.decl | ||
| drs | ||
| except | ||
| expr | ||
| lex | ||
| over | ||
| special | ||
| stmt.stmt | ||
| temp | ||