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c.opt (Winherited-variadic-ctor): New.

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c-family/
	* c.opt (Winherited-variadic-ctor): New.
cp/
	* class.c (one_inherited_ctor): Warn about variadic inherited ctor.

From-SVN: r192811
This commit is contained in:
Jason Merrill 2012-10-25 11:53:31 -04:00 committed by Jason Merrill
parent dc6a6f6156
commit 4514a96b2a
6 changed files with 27 additions and 2 deletions
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4
gcc/c-family/ChangeLog
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@ -1,3 +1,7 @@
2012-10-25 Jason Merrill <jason@redhat.com>
* c.opt (Winherited-variadic-ctor): New.
2012-10-25 Marc Glisse <marc.glisse@inria.fr>
PR c++/54427

4
gcc/c-family/c.opt
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@ -426,6 +426,10 @@ Warn when a declaration does not specify a type
Wimport
C ObjC C++ ObjC++ Undocumented Ignore
Winherited-variadic-ctor
C++ ObjC++ Var(warn_inh_var_ctor) Init(1) Warning
Warn about C++11 inheriting constructors when the base has a variadic constructor
Wint-to-pointer-cast
C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
Warn when there is a cast to a pointer from an integer of a different size

4
gcc/cp/ChangeLog
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@ -1,3 +1,7 @@
2012-10-25 Jason Merrill <jason@redhat.com>
* class.c (one_inherited_ctor): Warn about variadic inherited ctor.
2012-10-25 Marc Glisse <marc.glisse@inria.fr>
PR c++/54427

6
gcc/cp/class.c
View File

@ -2807,6 +2807,12 @@ one_inherited_ctor (tree ctor, tree t)
new_parms[i++] = TREE_VALUE (parms);
}
one_inheriting_sig (t, ctor, new_parms, i);
if (parms == NULL_TREE)
{
warning (OPT_Winherited_variadic_ctor,
"the ellipsis in %qD is not inherited", ctor);
inform (DECL_SOURCE_LOCATION (ctor), "%qD declared here", ctor);
}
}
/* Create default constructors, assignment operators, and so forth for

7
gcc/doc/invoke.texi
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@ -4632,6 +4632,13 @@ cases where multiple declaration is valid and changes nothing.
@opindex Wno-nested-externs
Warn if an @code{extern} declaration is encountered within a function.
@item -Wno-inherited-variadic-ctor
@opindex Winherited-variadic-ctor
@opindex Wno-inherited-variadic-ctor
Suppress warnings about use of C++11 inheriting constructors when the
base class inherited from has a C variadic constructor; the warning is
on by default because the ellipsis is not inherited.
@item -Winline
@opindex Winline
@opindex Wno-inline

4
gcc/testsuite/g++.dg/cpp0x/inh-ctor11.C
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@ -2,12 +2,12 @@
struct A
{
A(int, ...);
A(int, ...); // { dg-message "declared here" }
};
struct B: A
{
using A::A;
using A::A; // { dg-warning "ellipsis" }
};
B b1(42);