This patch mechanically replaces None with std::nullopt where the
compiler would warn if None were deprecated. The intent is to reduce
the amount of manual work required in migrating from Optional to
std::optional.
This is part of an effort to migrate from llvm::Optional to
std::optional:
https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
Based on include-cleaner's version, but:
- remove assert that can fail for input `/\<newline>* */`
- assert was also checking the wrong condition: that the prefix *differed* from
either `//` or from `/*`. Avoid use of strncmp where we can.
- add a comment that the brittleness of the text matching is intentional
Differential Revision: https://reviews.llvm.org/D138780
We plan to reuse it in the include-cleaner library, this patch moves
this functionality from clangd to libtooling, so that this piece of code can be
shared among all clang tools.
Differential Revision: https://reviews.llvm.org/D137697
Kazu Hirata