[PATCH] D86531: [analyzer][StdLibraryFunctionsChecker] Use Optionals throughout the summary API

[Gabor Marton via Phabricator via cfe-commits]

martong created this revision.
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By using optionals, we no longer have to check the validity of types that we
get from a lookup. This way, the definition of the summaries have a declarative
form, there are no superflous conditions in the source code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86531

Files:
  clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
  clang/test/Analysis/std-c-library-functions-POSIX-lookup.c

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