function in promise_type
According to https://cplusplus.github.io/CWG/issues/2585.html, this
fixes https://github.com/llvm/llvm-project/issues/54881
Simply, the clang tried to found (do lookup and overload resolution. Is
there any better word to use than found?) allocation function in
promise_type and global scope. However, this is not consistent with the
standard. The standard behavior would be that the compiler shouldn't
lookup in global scope in case we lookup the allocation function name in
promise_type. In other words, the program is ill-formed if there is
incompatible allocation function in promise type.
Reviewed By: erichkeane
Differential Revision: https://reviews.llvm.org/D125517
Chuanqi Xu