Author: faisalv Date: Mon Jan 9 05:47:51 2017 New Revision: 291439 URL: http://llvm.org/viewvc/llvm-project?rev=291439&view=rev Log: [cxx1z-constexpr-lambda] [NFC] Add a FIXME to reinstate certain restrictions on constexpr lambdas from appearing within function-signatures (CWG1607)
For further background, see Richard's comments: http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20170109/181998.html A patch to fix this is being worked on. Thanks! Modified: cfe/trunk/lib/Sema/SemaExpr.cpp Modified: cfe/trunk/lib/Sema/SemaExpr.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExpr.cpp?rev=291439&r1=291438&r2=291439&view=diff ============================================================================== --- cfe/trunk/lib/Sema/SemaExpr.cpp (original) +++ cfe/trunk/lib/Sema/SemaExpr.cpp Mon Jan 9 05:47:51 2017 @@ -13118,7 +13118,13 @@ void Sema::PopExpressionEvaluationContex // evaluate [...] a lambda-expression. D = diag::err_lambda_in_constant_expression; } + // C++1z allows lambda expressions as core constant expressions. + // FIXME: In C++1z, reinstate the restrictions on lambda expressions (CWG + // 1607) from appearing within template-arguments and array-bounds that + // are part of function-signatures. Be mindful that P0315 (Lambdas in + // unevaluated contexts) might lift some of these restrictions in a + // future version. if (Rec.Context != ConstantEvaluated || !getLangOpts().CPlusPlus1z) for (const auto *L : Rec.Lambdas) Diag(L->getLocStart(), D); _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
