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On the following testcase, we emit deprecated warnings or unavailable errors even on merge declarations of those lambdas (the dg-bogus directives), while IMHO we should emit them only when something actually calls those lambdas. The following patch temporarily disables that diagnostics during maybe_add_lambda_conv_op. PR2173R1 also says that ambiguity between attribute-specifier-seq at the end of requires-clause and attribute-specifier-seq from lambda-expression should be resolved to attribute-specifier-seq for the latter. Do we need to do anything about that? I mean, can a valid requires-clause end with an attribute-specifier-seq? Say operator int [[]] is valid primary expression, but requires operator int [[]] isn't valid, nor is requires operator int, no? 2022-05-04 Jakub Jelinek <jakub@redhat.com> * lambda.cc: Include decl.h. (maybe_add_lambda_conv_op): Temporarily override deprecated_state to UNAVAILABLE_DEPRECATED_SUPPRESS. * g++.dg/cpp23/lambda-attr1.C: New test. * g++.dg/cpp23/lambda-attr2.C: New test.
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