Yitzhak Mandelbaum 7e63a0d479 [clang-tidy] New check for safe usage of std::optional and like types.
This check verifies the safety of access to `std::optional` and related
types (including `absl::optional`). It is based on a corresponding Clang
Dataflow Analysis, which does most of the work. This check merely runs it and
converts its findings into diagnostics.

Differential Revision: https://reviews.llvm.org/D121120
2022-05-06 18:50:36 +00:00
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