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# DP: Fix PR c++/57211, don't warn about unused parameters of defaulted functions.
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2013-05-22 Paolo Carlini <paolo.carlini@oracle.com>
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* method.c (defaultable_fn_check): Avoid do_warn_unused_parameter
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warnings about defaulted functions.
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2013-05-22 Paolo Carlini <paolo.carlini@oracle.com>
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* g++.dg/cpp0x/Wunused-parm.C: New.
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--- a/src/gcc/cp/method.c
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+++ b/src/gcc/cp/method.c
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@@ -1864,13 +1864,19 @@ defaultable_fn_check (tree fn)
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- tree t = FUNCTION_FIRST_USER_PARMTYPE (fn);
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- for (; t && t != void_list_node; t = TREE_CHAIN (t))
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+ for (tree t = FUNCTION_FIRST_USER_PARMTYPE (fn);
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+ t && t != void_list_node; t = TREE_CHAIN (t))
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error ("defaulted function %q+D with default argument", fn);
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+ /* Avoid do_warn_unused_parameter warnings. */
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+ for (tree p = FUNCTION_FIRST_USER_PARM (fn); p; p = DECL_CHAIN (p))
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+ TREE_NO_WARNING (p) = 1;
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if (TYPE_BEING_DEFINED (DECL_CONTEXT (fn)))
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/* Defer checking. */;
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else if (!processing_template_decl)
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--- a/src/gcc/testsuite/g++.dg/cpp0x/Wunused-parm.C
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+++ b/src/gcc/testsuite/g++.dg/cpp0x/Wunused-parm.C
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+// { dg-options "-std=c++11 -Wunused-parameter" }
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+template <class T> T&& move(T&);
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+ A& operator=(A&& p) = default;