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Closed by commit rL368785: Add __has_builtin support for builtin function-like
type traits. (authored by rsmith, committed by ).
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This revision is now accepted and ready to land.
LGTM aside from some nits.
Comment at: docs/LanguageExtensions.rst:65
+
+ ``__has_builtin`` should not be used to detect support for a built-in macro;
+ use `
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Previously __has_builtin(__builtin_*) would return false for
__builtin_*s that we modeled as keywords rather than as functions
(because they ta
