[Sema] SequenceChecker: Add some comments + related small NFCs
authorBruno Ricci <riccibrun@gmail.com>
Sun, 22 Dec 2019 12:07:26 +0000 (12:07 +0000)
committerBruno Ricci <riccibrun@gmail.com>
Sun, 22 Dec 2019 12:07:26 +0000 (12:07 +0000)
commitb6eba3129291639dcd72ba31ed4b6f0b4dbe09e7
tree5b7a3ae2fce156a4ebf7ef39dcf1747ffe2e985d
parentd3f5769d5e93b30d4a8b4696381d5e4a304992fa
[Sema] SequenceChecker: Add some comments + related small NFCs

NFCs factored out of the following patches:
- Change all of the `Expr *` to `const Expr *` in SequenceChecker for
  const-correctness. SequenceChecker should not modify AST nodes.
- Add some comments.
- clang-format

Differential Revision: https://reviews.llvm.org/D57659

Reviewed By: xbolva00
clang/include/clang/Sema/Sema.h
clang/lib/Sema/SemaChecking.cpp