re PR c++/38543 ([C++0x] Cannot specialize variadic template function)
PR c++/38543 * pt.c (determine_specialization): Instead of comparing the number of parms, check that tsubst gives the right answer. From-SVN: r186522
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@ -1,5 +1,9 @@
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2012-04-16 Jason Merrill <jason@redhat.com>
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PR c++/38543
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* pt.c (determine_specialization): Instead of comparing the number
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of parms, check that tsubst gives the right answer.
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PR c++/52008
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* pt.c (process_partial_specialization): Complain about a partial
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specialization with fewer args than primary template parms.
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19
gcc/cp/pt.c
19
gcc/cp/pt.c
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@ -1839,6 +1839,7 @@ determine_specialization (tree template_id,
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{
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tree decl_arg_types;
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tree fn_arg_types;
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tree insttype;
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/* In case of explicit specialization, we need to check if
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the number of template headers appearing in the specialization
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@ -1900,15 +1901,6 @@ determine_specialization (tree template_id,
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fn_arg_types
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= skip_artificial_parms_for (fn, fn_arg_types);
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/* Check that the number of function parameters matches.
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For example,
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template <class T> void f(int i = 0);
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template <> void f<int>();
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The specialization f<int> is invalid but is not caught
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by get_bindings below. */
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if (list_length (fn_arg_types) != list_length (decl_arg_types))
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continue;
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/* Function templates cannot be specializations; there are
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no partial specializations of functions. Therefore, if
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the type of DECL does not match FN, there is no
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@ -1929,6 +1921,15 @@ determine_specialization (tree template_id,
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specialize TMPL will produce DECL. */
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continue;
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/* Make sure that the deduced arguments actually work. */
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insttype = tsubst (TREE_TYPE (fn), targs, tf_none, NULL_TREE);
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if (insttype == error_mark_node)
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continue;
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fn_arg_types
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= skip_artificial_parms_for (fn, TYPE_ARG_TYPES (insttype));
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if (!compparms (fn_arg_types, decl_arg_types))
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continue;
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/* Save this template, and the arguments deduced. */
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templates = tree_cons (targs, fn, templates);
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}
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@ -1,5 +1,8 @@
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2012-04-16 Jason Merrill <jason@redhat.com>
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PR c++/38543
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* g++.dg/cpp0x/variadic131.C: New.
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PR c++/52008
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* g++.dg/cpp0x/variadic130.C: New.
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@ -0,0 +1,11 @@
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// PR c++/38543
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// { dg-do compile { target c++11 } }
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template< typename ... T > void foo( T ... args );
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template<> void foo( ){}
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template<> void foo(int,double){}
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int main()
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{
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foo( 0, 0.0 );
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return 55;
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}
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