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re PR c++/34314 (ICE on invalid code (with variadic templates): tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in template_class_depth)

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2008-01-15  Douglas Gregor  <doug.gregor@gmail.com>

       PR c++/34314
       * error.c (dump_simple_decl): Display ellipsis for template
       non-type parameter packs.
       (dump_decl): Display ellipsis for template type parameter packs.
       (dump_template_decl): Display ellipsis for template template
       parameter packs.
       * pt.c (redeclare_class_template): When redeclaring a class
       template, check for collisions between template parameters and
       template parameter packs.

2008-01-15  Douglas Gregor  <doug.gregor@gmail.com>

       PR c++/34314
       * g++.dg/cpp0x/vt-34314.C: New.
       * g++.dg/cpp0x/variadic79.C: Fix the error message to reflect
       reality (the error message was wrong previously).

From-SVN: r131546
This commit is contained in:
Douglas Gregor 2008-01-15 17:59:44 +00:00 committed by Doug Gregor
parent c095a4f848
commit a022041e4c
5 changed files with 92 additions and 8 deletions
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12
gcc/cp/ChangeLog
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@ -1,3 +1,15 @@
2008-01-15 Douglas Gregor <doug.gregor@gmail.com>
PR c++/34314
* error.c (dump_simple_decl): Display ellipsis for template
non-type parameter packs.
(dump_decl): Display ellipsis for template type parameter packs.
(dump_template_decl): Display ellipsis for template template
parameter packs.
* pt.c (redeclare_class_template): When redeclaring a class
template, check for collisions between template parameters and
template parameter packs.
2008-01-15 Douglas Gregor <doug.gregor@gmail.com>
PR c++/33964

16
gcc/cp/error.c
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@ -754,6 +754,10 @@ dump_simple_decl (tree t, tree type, int flags)
|| TREE_CODE (DECL_INITIAL (t)) != TEMPLATE_PARM_INDEX))
dump_scope (CP_DECL_CONTEXT (t), flags);
flags &= ~TFF_UNQUALIFIED_NAME;
if ((flags & TFF_DECL_SPECIFIERS)
&& DECL_TEMPLATE_PARM_P (t)
&& TEMPLATE_PARM_PARAMETER_PACK (DECL_INITIAL (t)))
pp_identifier (cxx_pp, "...");
if (DECL_NAME (t))
dump_decl (DECL_NAME (t), flags);
else
@ -778,9 +782,15 @@ dump_decl (tree t, int flags)
{
if ((flags & TFF_DECL_SPECIFIERS)
&& TREE_CODE (TREE_TYPE (t)) == TEMPLATE_TYPE_PARM)
{
/* Say `class T' not just `T'. */
pp_cxx_identifier (cxx_pp, "class");
/* Emit the `...' for a parameter pack. */
if (TEMPLATE_TYPE_PARAMETER_PACK (TREE_TYPE (t)))
pp_cxx_identifier (cxx_pp, "...");
}
dump_type (TREE_TYPE (t), flags);
break;
}
@ -1015,8 +1025,14 @@ dump_template_decl (tree t, int flags)
nreverse(orig_parms);
if (DECL_TEMPLATE_TEMPLATE_PARM_P (t))
{
/* Say `template<arg> class TT' not just `template<arg> TT'. */
pp_cxx_identifier (cxx_pp, "class");
/* If this is a parameter pack, print the ellipsis. */
if (TEMPLATE_TYPE_PARAMETER_PACK (TREE_TYPE (t)))
pp_cxx_identifier (cxx_pp, "...");
}
}
if (TREE_CODE (DECL_TEMPLATE_RESULT (t)) == TYPE_DECL)

8
gcc/cp/pt.c
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@ -4195,7 +4195,13 @@ redeclare_class_template (tree type, tree parms)
if (tmpl_parm != error_mark_node
&& (TREE_CODE (tmpl_parm) != TREE_CODE (parm)
|| (TREE_CODE (tmpl_parm) != TYPE_DECL
&& !same_type_p (TREE_TYPE (tmpl_parm), TREE_TYPE (parm)))))
&& !same_type_p (TREE_TYPE (tmpl_parm), TREE_TYPE (parm)))
|| (TREE_CODE (tmpl_parm) != PARM_DECL
&& (TEMPLATE_TYPE_PARAMETER_PACK (TREE_TYPE (tmpl_parm))
!= TEMPLATE_TYPE_PARAMETER_PACK (TREE_TYPE (parm))))
|| (TREE_CODE (tmpl_parm) == PARM_DECL
&& (TEMPLATE_PARM_PARAMETER_PACK (DECL_INITIAL (tmpl_parm))
!= TEMPLATE_PARM_PARAMETER_PACK (DECL_INITIAL (parm))))))
{
error ("template parameter %q+#D", tmpl_parm);
error ("redeclared here as %q#D", parm);

2
gcc/testsuite/g++.dg/cpp0x/variadic79.C
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@ -4,4 +4,4 @@
template<template<typename> class...> struct A;
template<template<typename...> class... B> struct A<B...> {}; // { dg-error "mismatch|'template<class ...> class B ...'" }
template<template<typename...> class... B> struct A<B...> {}; // { dg-error "mismatch|'template<class ...> class ... B ...'" }

50
gcc/testsuite/g++.dg/cpp0x/vt-34314.C Normal file
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@ -0,0 +1,50 @@
// { dg-options "-std=c++0x" }
template<typename Fun, typename... Args> // { dg-error "template parameter" }
struct call;
template<typename Fun, typename Arg0>
struct call // { dg-error "redeclared here" }
{
template<typename Sig>
struct result;
template<typename X, typename Y>
struct result<X(Y)>
{
typedef X type;
};
};
template<typename Fun, int... N> // { dg-error "template parameter" }
struct call2;
template<typename Fun, int N>
struct call2 // { dg-error "redeclared here" }
{
template<typename Sig>
struct result;
template<typename X, typename Y>
struct result<X(Y)>
{
typedef X type;
};
};
template<typename Fun, template<typename> class... TT> // { dg-error "template parameter" }
struct call3;
template<typename Fun, template<typename> class TT>
struct call3 // { dg-error "redeclared here" }
{
template<typename Sig>
struct result;
template<typename X, typename Y>
struct result<X(Y)>
{
typedef X type;
};
};