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Basic: Update the rule for whether to use FEATURE or EXTENSION. #153104

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Basic: Update the rule for whether to use FEATURE or EXTENSION. #153104

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7 changes: 4 additions & 3 deletions clang/include/clang/Basic/Features.def
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,10 @@
// extension will be made available.
//
// FEATURE(...) should be used to advertise support for standard language
// features, whereas EXTENSION(...) should be used for clang extensions. Note
// that many of the identifiers in this file don't follow this rule for backward
// compatibility reasons.
// features or ABI-affecting clang extensions, whereas EXTENSION(...) should be
// used for clang extensions which do not affect ABI. Note that many of the
// identifiers in this file don't follow this rule for backward compatibility
// reasons.
//
//===----------------------------------------------------------------------===//

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