[PATCH] D103319: [analyzer] Use Optional as a return type of StoreManager::castRegion

[Denys Petrov via Phabricator via cfe-commits]

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Make StoreManager::castRegion function usage safier. Replace `const MemRegion *` with `Optional<const MemRegion *>`. Simplified one of related test cases due to suggestions in D101635 <https://reviews.llvm.org/D101635>.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D103319

Files:
  clang/include/clang/StaticAnalyzer/Core/PathSensitive/Store.h
  clang/lib/StaticAnalyzer/Core/SValBuilder.cpp
  clang/lib/StaticAnalyzer/Core/Store.cpp

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