[PATCH] D116280: [clang] adds unary type trait checks as compiler built-ins

[Christopher Di Bella via Phabricator via cfe-commits]

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This is information that the compiler already has, and should be exposed
so that the library doesn't need to reimplement the exact same
functionality.

- `__is_null_pointer`
- `__is_bounded_array`
- `__is_scoped_enum`


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116280

Files:
  clang/include/clang/Basic/TokenKinds.def
  clang/lib/Parse/ParseDeclCXX.cpp
  clang/lib/Parse/ParseExpr.cpp
  clang/lib/Sema/SemaExprCXX.cpp
  clang/test/SemaCXX/type-traits.cpp

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