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c++: deleted after first declaration [PR101106]

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An explicitly deleted function must be deleted on its first declaration.  We
were diagnosing this error only with -Wpedantic, but always giving the
"previous declaration" note.  This patch removes the -Wpedantic dependency
and also makes the note depend on the previous diagnostic.

	PR c++/101106

gcc/cp/ChangeLog:

	* decl.c (duplicate_decls): Make 'deleted after first declaration'
	pedwarn on by default.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/deleted15.C: New test.
This commit is contained in:
Jason Merrill 2021-06-17 15:31:15 -04:00
parent 58e3b17f4c
commit 331e20a69b
2 changed files with 10 additions and 5 deletions
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9
gcc/cp/decl.c
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@ -2170,11 +2170,10 @@ duplicate_decls (tree newdecl, tree olddecl, bool hiding, bool was_hidden)
if (DECL_DELETED_FN (newdecl))
{
auto_diagnostic_group d;
pedwarn (newdecl_loc, OPT_Wpedantic,
"deleted definition of %qD is not first declaration",
newdecl);
inform (olddecl_loc,
"previous declaration of %qD", olddecl);
if (pedwarn (newdecl_loc, 0, "deleted definition of %qD "
"is not first declaration", newdecl))
inform (olddecl_loc,
"previous declaration of %qD", olddecl);
}
DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
}

6
gcc/testsuite/g++.dg/cpp0x/deleted15.C Normal file
View File

@ -0,0 +1,6 @@
// PR c++/101106
// { dg-do compile { target c++11 } }
// { dg-options "" }
int f();
int f() = delete; // { dg-message "not first declaration" }