[PATCH] D144285: [Clang] Implement CWG2518 - static_assert(false)

[Corentin Jabot via Phabricator via cfe-commits]

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This allows `static_assert(false)` to not be ill-formed
in template definitions.

This change is applied as a DR in all C++ modes.

Of notes, a couple of tests were relying of the eager nature
of static_assert

- test/SemaTemplate/instantiation-dependence.cpp
- test/SemaTemplate/instantiate-var-template.cpp

I don't know if the changes to `static_assert`
still allow that sort of tests to be expressed.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D144285

Files:
  clang/docs/ReleaseNotes.rst
  clang/lib/Sema/SemaDeclCXX.cpp
  clang/test/CXX/drs/dr25xx.cpp
  clang/test/SemaCXX/access-base-class.cpp
  clang/test/SemaCXX/coroutines-exp-namespace.cpp
  clang/test/SemaCXX/coroutines.cpp
  clang/test/SemaCXX/static-assert.cpp
  clang/test/SemaTemplate/instantiate-var-template.cpp
  clang/test/SemaTemplate/instantiation-dependence.cpp
  clang/www/cxx_dr_status.html

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