aaron.ballman added inline comments.
================ Comment at: clang/include/clang/Basic/AttrDocs.td:1764 + the ``external_source_symbol`` attribute with + ``__has_attribute(external_source_symbol_with_usr)``. + ---------------- erichkeane wrote: > arphaman wrote: > > aaron.ballman wrote: > > > erichkeane wrote: > > > > I don't think we can do this. __has_attribute needs to take the actual > > > > name of the attribute. > > > +1 > > `__has_attribute(external_source_symbol)` already works but it wouldn't > > help here as it doesn't tell whether the attribute supports USR or not. Are > > you saying I should come up with a totally new attribute that accepts USR? > > That was originally why I had the `__has_feature` check. > The typical way of doing this in the standard is to have > __has_c_attribute/__has_cpp_attribute return a larger non-zero value for the > normal attribute. > > I suspect we should extend `__has_attribute` to do something similar (that > is, allowing Feature Test Macros' for it). Aaron, WDYT? > The typical way of doing this in the standard is to have > has_c_attribute/has_cpp_attribute return a larger non-zero value for the > normal attribute. Which we expose for the CXX11 and C2X spellings in Attr.td, but don't expose for the `Clang` spelling (easy enough to change). > I suspect we should extend __has_attribute to do something similar (that is, > allowing Feature Test Macros' for it). Aaron, WDYT? +1, if we don't already do that. This should be handled entirely within Attr.td and ClangAttrEmitter.cpp for a generic solution. CHANGES SINCE LAST ACTION https://reviews.llvm.org/D141324/new/ https://reviews.llvm.org/D141324 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
