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[Sema] Remove a -Wrange warning from -Wall

Authored by Mordante on Jan 26 2020, 10:16 AM.



During the review of D73007 Aaron Puchert mentioned warn_for_range_variable_always_copy shouldn't be part of -Wall since some coding styles require for(const auto &bar : bars). This warning would cause false positives for these users. Based on Aaron's proposal refactored the warnings:

  • -Wrange-loop-construct warns about possibly unintended constructor calls. This is part of -Wall. It contains
    • warn_for_range_copy: loop variable A of type B creates a copy from type C
    • warn_for_range_const_reference_copy: loop variable A is initialized with a value of a different type resulting in a copy
  • -Wrange-loop-bind-reference warns about misleading use of reference types. This is not part of -Wall. It contains
    • warn_for_range_variable_always_copy: loop variable A is always a copy because the range of type B does not return a reference

Note the patch is intended to be backported to clang 11, thus the release notes aren't updated.

Diff Detail

Event Timeline

Unit tests: pass. 62197 tests passed, 0 failed and 815 were skipped.

clang-tidy: pass.

clang-format: fail. Please format your changes with clang-format by running git-clang-format HEAD^ or applying this patch.

Build artifacts: diff.json, clang-tidy.txt, clang-format.patch, CMakeCache.txt, console-log.txt, test-results.xml

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Looks right to me, but someone else should approve.

This revision is now accepted and ready to land.Jan 27 2020, 1:47 PM
This revision was automatically updated to reflect the committed changes.

Created D73834 to cherry-pick the changes to the release branch and updates the release notes.