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[clang] adds copy-assignable type-trait builtins
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Authored by cjdb on Oct 4 2022, 10:34 PM.

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Reviewers
aaron.ballman
Group Reviewers
Restricted Project
Summary
  • __is_copy_assignable
  • __is_nothrow_copy_assignable
  • __is_trivially_copy_assignable

This is information that the compiler already has, and should be exposed
so that the library doesn't need to reimplement the exact same
functionality.

Similarly to __is_copy_construcitble, etc., these traits can't be
implemented using __is_assignable, etc., because we can't form
references to void, and references are a fundamental part of copy
assignment.

Depends on D135238.

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cjdb created this revision.Oct 4 2022, 10:34 PM
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cjdb added a reviewer: Restricted Project.Oct 4 2022, 10:35 PM
cjdb updated this revision to Diff 465286.Oct 4 2022, 11:25 PM
cjdb edited the summary of this revision. (Show Details)

corrects commit message

erichkeane added a subscriber: Restricted Project.Oct 6 2022, 6:22 AM
erichkeane added a subscriber: erichkeane.

Same comment as the previous patch on triviality.