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  1. 23 Jan, 2022 1 commit
    • Richard's avatar
      [clang-tidy] Add readability-duplicate-include check · d2e8fb33
      Richard authored
      Looks for duplicate includes and removes them.
      Every time an include directive is processed, check a vector of filenames
      to see if the included file has already been included.  If so, it issues
      a warning and a replacement to remove the entire line containing the
      duplicated include directive.
      When a macro is defined or undefined, the vector of filenames is cleared.
      This enables including the same file multiple times, but getting
      different expansions based on the set of active macros at the time of
      inclusion.  For example:
        #undef NDEBUG
        #include "assertion.h"
        // ...code with assertions enabled
        #define NDEBUG
        #include "assertion.h"
        // ...code with assertions disabled
      Since macros are redefined between the inclusion of assertion.h,
      they are not flagged as redundant.
      Differential Revision: