Message ID | 20180815184502.GQ7399@redhat.com |
---|---|
State | New |
Headers | show |
Series | C++ PATCH for c++/67012, diagnose decltype(auto) f() -> int; | expand |
On Wed, Aug 15, 2018 at 02:45:02PM -0400, Marek Polacek wrote: > I think that [dcl.fct] says that a function with trailing-return-type should > have plain auto as the return type, so this test should not compile. > > Bootstrapped/regtested on x86_64-linux, ok for trunk? Looking at 86942, I think we need a fix that handles both PRs. So ignore this patch. Marek
diff --git gcc/cp/decl.c gcc/cp/decl.c index fa58bc4d2b3..05f4991c184 100644 --- gcc/cp/decl.c +++ gcc/cp/decl.c @@ -11263,7 +11263,10 @@ grokdeclarator (const cp_declarator *declarator, virtualp = false; } } - else if (!is_auto (type) && sfk != sfk_conversion) + else if ((!is_auto (type) && sfk != sfk_conversion) + || (is_auto (type) + && (TYPE_IDENTIFIER (type) + == decltype_auto_identifier))) { error ("%qs function with trailing return type has" " %qT as its type rather than plain %<auto%>", diff --git gcc/testsuite/g++.dg/cpp1y/auto-fn52.C gcc/testsuite/g++.dg/cpp1y/auto-fn52.C index e69de29bb2d..e239bc27dc2 100644 --- gcc/testsuite/g++.dg/cpp1y/auto-fn52.C +++ gcc/testsuite/g++.dg/cpp1y/auto-fn52.C @@ -0,0 +1,4 @@ +// PR c++/67012 +// { dg-do compile { target c++14 } } + +decltype(auto) f() -> int; // { dg-error "function with trailing return type has" }