On 3/24/20 11:45 AM, Marek Polacek wrote:
On Mon, Mar 23, 2020 at 10:41:28AM -0400, Jason Merrill wrote:
On 3/20/20 7:02 PM, Marek Polacek wrote:
On Fri, Mar 20, 2020 at 02:12:49PM -0400, Jason Merrill wrote:
On 3/20/20 1:06 PM, Marek Polacek wrote:
Wonderful.  I've added a bunch of tests, and some from the related DRs too.
But I had a problem with the class-or-decltype case: if we have

template<typename T> struct D : T::template B<int>::template C<int> {};

then we still require all the 'template' keywords here (as does clang).  So I'm
kind of confused, but I don't think it's a big deal right now.

This seems related enough that I'd like to fix it at the same time; why
doesn't your patch fix it?  Is it because typename_p is false?

Ah, I was mistaken.  Of course we need the template keyword here: it's a member 
of an
unknown specialization!

That's why it's needed in contexts where we don't know whether or not we're
naming a type.  But where we do know that, as in a base-specifier, it isn't
necessary.  This is exactly DR 1710: "The keyword template is optional in a
... class-or-decltype (Clause 11.7 [class.derived])...."

Duh, not sure what I was thinking.

I've implemented that in cp_parser_nested_name_specifier_opt: assume 'template'
if we've seen 'typename'.  If it turns out that this is wrong because it
triggers in contexts where it shouldn't, we'll have to introduce something like
CP_PARSER_FLAGS_TEMPLATE_OPTIONAL.

With this another problem revealed: we weren't accepting an alias template
after 'template' which DR1710 says is valid.  Fixed by the TYPE_ALIAS_P hunk
in the new check_template_keyword_in_nested_name_spec. (alias-decl1.C)

But this is still not over: I noticed that

template <typename T> struct S {
   template <typename TT>
   using U = TT;
};
template <typename T> typename S<int>::template U<T>::type foo;

is still rejected and shouldn't be.  Here 
check_template_keyword_in_nested_name_spec
gets

  <template_type_parm 0x7fffeaa42690 U type_0 VOID
     align:8 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type 
0x7fffeaa420a8
    index 0 level 1 orig_level 2
     chain <type_decl 0x7fffea90bda8 TT>>

Any suggestions how to handle this?

It should work to check for an alias whether or not the target is a TYPENAME_TYPE.

FWIW, bootstrapped/regtested on x86_64-linux.

-- >8 --
Consider

   template <typename T> class A {
     template <typename U> class B {
       void fn(typename A<T>::B<U>);
     };
   };

which is rejected with
error: 'typename A<T>::B' names 'template<class T> template<class U> class 
A<T>::B', which is not a type
whereas clang/icc/msvc accept it.

"typename A<T>::B<U>" is a typename-specifier.  Sadly, our comments
don't mention it anywhere, because the typename-specifier wasn't in C++11;
it was only added to the language in N1376.  Instead, we handle it as
an elaborated-type-specifier (not a problem thus far).   So we get to
cp_parser_nested_name_specifier_opt which has a loop that breaks if we
don't see a < or ::, but that means we can -- tentatively -- parse even
B<U> which is not a nested-name-specifier (it doesn't end with a ::).

Even though we're parsing B<U> tentatively, we issue an error in
cp_parser_class_name -> make_typename_type, but here we should not.  In
fact, we probably shouldn't have parsed "B<U>" at all.  Fixed by the
cp_parser_class_name hunk.

I think this should compile because [temp.names]/4 says: "In a qualified-id
used as the name in a typename-specifier, elaborated-type-specifier,
using-declaration, or class-or-decltype, an optional keyword template
appearing at the top level is ignored.", added in DR 1710.  Also see
DR 1812.

This issue on its own is not a significant problem or a regression.
However, in C++20, the typename here becomes optional, and so this test
is rejected in C++20, but accepted in C++17:

   template <typename T> class A {
     template <typename U> class B {
       void fn(A<T>::B<U>);
     };
   };

Here we morph A<T>::B<U> into a typename-specifier, but that happens
in cp_parser_simple_type_specifier and we never handle it as above.
To fake the template keyword I'm afraid we need to use cp_parser_template_id
with template_keyword_p=true as in the patch below.  The tricky thing
is to avoid breaking concepts.

To handle DR 1710, I made cp_parser_nested_name_specifier_opt assume that
when we're naming a type, the template keyword is present, too.  That
revealed a bug: DR 1710 also says that the template keyword can be followed
by an alias template, but we weren't prepared to handle that.  alias-decl1.C
exercise this.

        DR 1710
        PR c++/94057 - template keyword in a typename-specifier.
        * parser.c (check_template_keyword_in_nested_name_spec): New.
        (cp_parser_nested_name_specifier_opt): Implement DR1710, optional
        'template'.  Call check_template_keyword_in_nested_name_spec.
        (cp_parser_simple_type_specifier): Assume that a <
        following a qualified-id in a typename-specifier begins
        a template argument list.
        (cp_parser_class_name): Complain only if not parsing tentatively.

        * g++.dg/cpp1y/alias-decl1.C: New test.
        * g++.dg/parse/missing-template1.C: Update dg-error.
        * g++.dg/parse/template3.C: Likewise.
        * g++.dg/template/error4.C: Likewise.
        * g++.dg/template/meminit2.C: Likewise.
        * g++.dg/template/dependent-name5.C: Likewise.
        * g++.dg/template/dependent-name7.C: New test.
        * g++.dg/template/dependent-name8.C: New test.
        * g++.dg/template/dependent-name9.C: New test.
        * g++.dg/template/dependent-name10.C: New test.
        * g++.dg/template/dependent-name11.C: New test.
        * g++.dg/template/dependent-name12.C: New test.
        * g++.dg/template/dependent-name13.C: New test.
        * g++.dg/template/dr1794.C: New test.
        * g++.dg/template/dr314.C: New test.
        * g++.dg/template/dr1710.C: New test.
        * g++.dg/template/dr1710-2.C: New test.
        * g++.old-deja/g++.pt/crash38.C: Update dg-error.
---
  gcc/cp/parser.c                               | 91 ++++++++++++++++---
  gcc/testsuite/g++.dg/cpp1y/alias-decl1.C      |  9 ++
  .../g++.dg/parse/missing-template1.C          |  4 +-
  gcc/testsuite/g++.dg/parse/template3.C        |  5 +-
  .../g++.dg/template/dependent-name10.C        | 18 ++++
  .../g++.dg/template/dependent-name11.C        | 15 +++
  .../g++.dg/template/dependent-name12.C        |  7 ++
  .../g++.dg/template/dependent-name13.C        |  8 ++
  .../g++.dg/template/dependent-name5.C         |  2 -
  .../g++.dg/template/dependent-name7.C         |  9 ++
  .../g++.dg/template/dependent-name8.C         |  9 ++
  .../g++.dg/template/dependent-name9.C         |  9 ++
  gcc/testsuite/g++.dg/template/dr1710-2.C      | 10 ++
  gcc/testsuite/g++.dg/template/dr1710.C        |  9 ++
  gcc/testsuite/g++.dg/template/dr1794.C        | 14 +++
  gcc/testsuite/g++.dg/template/dr314.C         | 15 +++
  gcc/testsuite/g++.dg/template/error4.C        |  3 +-
  gcc/testsuite/g++.dg/template/meminit2.C      |  4 +-
  gcc/testsuite/g++.old-deja/g++.pt/crash38.C   |  6 +-
  19 files changed, 214 insertions(+), 33 deletions(-)
  create mode 100644 gcc/testsuite/g++.dg/cpp1y/alias-decl1.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name10.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name11.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name12.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name13.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name7.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name8.C
  create mode 100644 gcc/testsuite/g++.dg/template/dependent-name9.C
  create mode 100644 gcc/testsuite/g++.dg/template/dr1710-2.C
  create mode 100644 gcc/testsuite/g++.dg/template/dr1710.C
  create mode 100644 gcc/testsuite/g++.dg/template/dr1794.C
  create mode 100644 gcc/testsuite/g++.dg/template/dr314.C

diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index cbd5510a8fb..824fb18e83a 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -6266,6 +6266,39 @@ cp_parser_unqualified_id (cp_parser* parser,
      }
  }
+/* Check [temp.names]/5: A name prefixed by the keyword template shall
+   be a template-id or the name shall refer to a class template or an
+   alias template.  */
+
+static void
+check_template_keyword_in_nested_name_spec (tree name)
+{
+  if (CLASS_TYPE_P (name)
+      && ((CLASSTYPE_USE_TEMPLATE (name)
+          && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (name)))
+         || CLASSTYPE_IS_TEMPLATE (name)))
+    return;
+
+
+  if (TREE_CODE (name) == TYPENAME_TYPE)
+    {
+      if (TREE_CODE (TYPENAME_TYPE_FULLNAME (name)) == TEMPLATE_ID_EXPR)
+       return;
+      /* Alias templates are also OK.  */
+      else if (TYPE_ALIAS_P (name))
+       {
+         tree tinfo = TYPE_ALIAS_TEMPLATE_INFO (name);
+         if (tinfo && DECL_ALIAS_TEMPLATE_P (TI_TEMPLATE (tinfo)))
+           return;
+       }
+    }

I think you want to check all typedefs like in e.g. find_parameter_packs_r; if the name is a typedef, it's only suitable if alias_template_specialization_p.

+  permerror (input_location, TYPE_P (name)
+            ? G_("%qT is not a template")
+            : G_("%qD is not a template"),
+            name);
+}
+
  /* Parse an (optional) nested-name-specifier.
nested-name-specifier: [C++98]
@@ -6389,7 +6422,17 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
        /* Look for the optional `template' keyword, if this isn't the
         first time through the loop.  */
        if (success)
-       template_keyword_p = cp_parser_optional_template_keyword (parser);
+       {
+         template_keyword_p = cp_parser_optional_template_keyword (parser);
+         /* DR1710: "In a qualified-id used as the name in
+            a typename-specifier, elaborated-type-specifier, using-declaration,
+            or class-or-decltype, an optional keyword template appearing at
+            the top level is ignored."  */
+         if (!template_keyword_p
+             && typename_keyword_p
+             && cp_parser_nth_token_starts_template_argument_list_p (parser, 
2))
+           template_keyword_p = true;
+       }
/* Save the old scope since the name lookup we are about to do
         might destroy it.  */
@@ -6580,18 +6623,8 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
        if (TREE_CODE (new_scope) == TYPE_DECL)
        new_scope = TREE_TYPE (new_scope);
        /* Uses of "template" must be followed by actual templates.  */
-      if (template_keyword_p
-         && !(CLASS_TYPE_P (new_scope)
-              && ((CLASSTYPE_USE_TEMPLATE (new_scope)
-                   && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (new_scope)))
-                  || CLASSTYPE_IS_TEMPLATE (new_scope)))
-         && !(TREE_CODE (new_scope) == TYPENAME_TYPE
-              && (TREE_CODE (TYPENAME_TYPE_FULLNAME (new_scope))
-                  == TEMPLATE_ID_EXPR)))
-       permerror (input_location, TYPE_P (new_scope)
-                  ? G_("%qT is not a template")
-                  : G_("%qD is not a template"),
-                  new_scope);
+      if (template_keyword_p)
+       check_template_keyword_in_nested_name_spec (new_scope);
        /* If it is a class scope, try to complete it; we are about to
         be looking up names inside the class.  */
        if (TYPE_P (new_scope)
@@ -18113,6 +18146,33 @@ cp_parser_simple_type_specifier (cp_parser* parser,
                }
            }
        }
+      /* DR 1812: A < following a qualified-id in a typename-specifier
+        could safely be assumed to begin a template argument list, so
+        the template keyword should be optional.  */
+      else if (parser->scope
+              && qualified_p
+              && typename_p
+              && cp_lexer_next_token_is (parser->lexer, CPP_TEMPLATE_ID))
+       {
+         cp_parser_parse_tentatively (parser);
+
+         type = cp_parser_template_id (parser,
+                                       /*template_keyword_p=*/true,
+                                       /*check_dependency_p=*/true,
+                                       none_type,
+                                       /*is_declaration=*/false);
+         /* This is handled below, so back off.  */
+         if (type && concept_check_p (type))
+           cp_parser_simulate_error (parser);
+
+         if (!cp_parser_parse_definitely (parser))
+           type = NULL_TREE;
+         else if (TREE_CODE (type) == TEMPLATE_ID_EXPR)
+           type = make_typename_type (parser->scope, type, typename_type,
+                                      /*complain=*/tf_error);
+         else if (TREE_CODE (type) != TYPE_DECL)
+           type = NULL_TREE;
+       }
/* Otherwise, look for a type-name. */
        if (!type)
@@ -23636,8 +23696,9 @@ cp_parser_class_name (cp_parser *parser,
        && decl != error_mark_node
        && !is_overloaded_fn (decl))
      {
-      decl = make_typename_type (scope, decl, typename_type,
-                                /*complain=*/tf_error);
+      tsubst_flags_t complain = (cp_parser_parsing_tentatively (parser)
+                                ? tf_none : tf_error);
+      decl = make_typename_type (scope, decl, typename_type, complain);

Why?

        if (decl != error_mark_node)
        decl = TYPE_NAME (decl);
      }
diff --git a/gcc/testsuite/g++.dg/cpp1y/alias-decl1.C 
b/gcc/testsuite/g++.dg/cpp1y/alias-decl1.C
new file mode 100644
index 00000000000..e5397e71bd6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/alias-decl1.C
@@ -0,0 +1,9 @@
+// DR 1710 - Missing template keyword in class-or-decltype
+// { dg-do compile { target c++14 } }
+
+template <int> struct S {
+  template <int> struct A;
+  template <int N> using U = typename A<N>::foo;
+};
+template <typename T> typename S<1>::U<T::foo>::type a;
+template <typename T> typename S<1>::template U<T::foo>::type a2;
diff --git a/gcc/testsuite/g++.dg/parse/missing-template1.C 
b/gcc/testsuite/g++.dg/parse/missing-template1.C
index fcc3aa0c3ff..19c1433d09f 100644
--- a/gcc/testsuite/g++.dg/parse/missing-template1.C
+++ b/gcc/testsuite/g++.dg/parse/missing-template1.C
@@ -12,9 +12,7 @@ template <typename T> struct A
template <typename T> void foo()
  {
-    typedef typename A<T>::B<T>::X Y; // { dg-error "non-template" "non" }
-    // { dg-error "not declare" "decl" { target *-*-* } .-1 }
-    // { dg-message "note" "note" { target *-*-* } .-2 }
+    typedef typename A<T>::B<T>::X Y;
  }
void bar()
diff --git a/gcc/testsuite/g++.dg/parse/template3.C 
b/gcc/testsuite/g++.dg/parse/template3.C
index c284a5ee040..8da8a48a3c3 100644
--- a/gcc/testsuite/g++.dg/parse/template3.C
+++ b/gcc/testsuite/g++.dg/parse/template3.C
@@ -13,7 +13,4 @@ struct X : Outer<b>::template Inner<T>
  {};
template <bool b, typename T>
-struct Y : Outer<b>::Inner<T> {}; // { dg-error "used as template" "temp" }
-// { dg-error "expected" "exp" { target *-*-* } .-1 }
-// { dg-message "note" "note" { target *-*-* } .-2 }
-
+struct Y : Outer<b>::Inner<T> {};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name10.C 
b/gcc/testsuite/g++.dg/template/dependent-name10.C
new file mode 100644
index 00000000000..18e024f7e6d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name10.C
@@ -0,0 +1,18 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+// { dg-do compile { target c++11 } }
+
+template<typename T> struct A {
+  template<typename U> struct B {
+    typedef int TT;
+    typedef int TT2;
+    typedef int TT3;
+    typedef int TT4;
+  };
+};
+
+struct X : A<int>::B<int> {
+  using A<int>::template B<int>::TT;
+  using typename A<int>::template B<int>::TT2;
+  using A<int>::B<int>::TT3;
+  using typename A<int>::B<int>::TT4;
+};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name11.C 
b/gcc/testsuite/g++.dg/template/dependent-name11.C
new file mode 100644
index 00000000000..687a9bd5df5
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name11.C
@@ -0,0 +1,15 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+// { dg-do compile { target c++11 } }
+
+template<typename T> struct A {
+  template<typename U>
+  struct W { };
+};
+
+void
+g ()
+{
+  // class-key nested-name-specifier template[opt] simple-template-id
+  struct A<int>::W<int> w;
+  struct A<int>::template W<int> w2;
+}
diff --git a/gcc/testsuite/g++.dg/template/dependent-name12.C 
b/gcc/testsuite/g++.dg/template/dependent-name12.C
new file mode 100644
index 00000000000..7ee94e7457d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name12.C
@@ -0,0 +1,7 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+
+template <bool> struct A;
+template <typename, typename> struct B;
+template <typename T, typename U, typename V> struct B<T U::*, V> {
+  typename A<V::x>::type::type t;
+};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name13.C 
b/gcc/testsuite/g++.dg/template/dependent-name13.C
new file mode 100644
index 00000000000..1e971168657
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name13.C
@@ -0,0 +1,8 @@
+// DR 1710 - Missing template keyword in class-or-decltype
+
+template<typename T> struct S {
+  void fn(typename T::template B<int>::template C<int>);
+  void fn2(typename T::B<int>::template C<int>);
+  void fn3(typename T::template B<int>::C<int>);
+  void fn4(typename T::B<int>::C<int>);
+};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name5.C 
b/gcc/testsuite/g++.dg/template/dependent-name5.C
index fc78983324b..15c1acb0347 100644
--- a/gcc/testsuite/g++.dg/template/dependent-name5.C
+++ b/gcc/testsuite/g++.dg/template/dependent-name5.C
@@ -22,9 +22,7 @@ struct A
typedef N<int> type6;
    typedef A::N<int>    type7;
-// { dg-error "" "" { target c++2a } .-1 }
    typedef A<T>::N<int> type8;
-// { dg-error "" "" { target c++2a } .-1 }
    typedef A<T*>::template N<int> type9;  // { dg-error "" "" { target 
c++17_down } }
    typedef typename A<T*>::template N<int> type10;
diff --git a/gcc/testsuite/g++.dg/template/dependent-name7.C b/gcc/testsuite/g++.dg/template/dependent-name7.C
new file mode 100644
index 00000000000..3dfa42d2df0
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name7.C
@@ -0,0 +1,9 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+// { dg-do compile }
+
+template<typename T> struct A {
+  template<typename U> struct B {
+    B(A<T>::B<U>&);
+    void fn(A<T>::B<U>);
+  };
+};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name8.C 
b/gcc/testsuite/g++.dg/template/dependent-name8.C
new file mode 100644
index 00000000000..ad9e44f9b85
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name8.C
@@ -0,0 +1,9 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+// { dg-do compile }
+
+template<typename T> struct A {
+  template<typename U> struct B {
+    B(typename A<T>::B<U>&);
+    void fn(typename A<T>::B<U>);
+  };
+};
diff --git a/gcc/testsuite/g++.dg/template/dependent-name9.C 
b/gcc/testsuite/g++.dg/template/dependent-name9.C
new file mode 100644
index 00000000000..6dfdbc176c1
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dependent-name9.C
@@ -0,0 +1,9 @@
+// PR c++/94057 - template keyword in a typename-specifier.
+// { dg-do compile }
+
+template<typename T> struct A {
+  template<typename U> struct B {
+    B(typename A<T>::template B<U>&);
+    void fn(typename A<T>::template B<U>);
+  };
+};
diff --git a/gcc/testsuite/g++.dg/template/dr1710-2.C 
b/gcc/testsuite/g++.dg/template/dr1710-2.C
new file mode 100644
index 00000000000..99d49b746b2
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dr1710-2.C
@@ -0,0 +1,10 @@
+// DR 1710 - Missing template keyword in class-or-decltype
+// { dg-do compile }
+
+template<typename T> struct A {
+  template<typename U> struct B {
+  };
+};
+
+template<typename T> struct D : A<int>::B<int> {};
+template<typename T> struct D2 : A<int>::template B<int> {};
diff --git a/gcc/testsuite/g++.dg/template/dr1710.C 
b/gcc/testsuite/g++.dg/template/dr1710.C
new file mode 100644
index 00000000000..c945977971f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dr1710.C
@@ -0,0 +1,9 @@
+// DR 1710 - Missing template keyword in class-or-decltype
+// { dg-do compile }
+
+template<typename T> struct D : T::template B<int>::template C<int> {};
+template<typename T> struct D2 : T::B<int>::template C<int> {};
+template<typename T> struct D3 : T::template B<int>::C<int> {};
+template<typename T> struct D4 : T::B<int>::C<int> {};
+template<typename T> struct D5 : T::template B<int>::type::type {};
+template<typename T> struct D6 : T::B<int>::type::type {};
diff --git a/gcc/testsuite/g++.dg/template/dr1794.C 
b/gcc/testsuite/g++.dg/template/dr1794.C
new file mode 100644
index 00000000000..f629d7d0b98
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dr1794.C
@@ -0,0 +1,14 @@
+// DR 1794 - template keyword and alias templates.
+// { dg-do compile { target c++11 } }
+
+template<template<typename> class Template>
+struct Internal {
+  template<typename Arg>
+  using Bind = Template<Arg>;
+};
+
+template<template<typename> class Template, typename Arg>
+using Instantiate = Template<Arg>;
+
+template<template<typename> class Template, typename Argument>
+using Bind = Instantiate<Internal<Template>::template Bind, Argument>;
diff --git a/gcc/testsuite/g++.dg/template/dr314.C 
b/gcc/testsuite/g++.dg/template/dr314.C
new file mode 100644
index 00000000000..7c0d8ac592f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/dr314.C
@@ -0,0 +1,15 @@
+// DR 314 - template in base class specifier.
+
+template <typename T>
+struct A {
+  template <typename U>
+  struct B {};
+};
+
+template <typename T>
+struct C : public A<T>::template B<T> {
+};
+
+template <typename T>
+struct C2 : public A<int>::B<T> {
+};
diff --git a/gcc/testsuite/g++.dg/template/error4.C 
b/gcc/testsuite/g++.dg/template/error4.C
index 9d76561aa02..a5030f06c98 100644
--- a/gcc/testsuite/g++.dg/template/error4.C
+++ b/gcc/testsuite/g++.dg/template/error4.C
@@ -5,5 +5,4 @@ template<class T> struct C1
  };
template<class T, class U>
-void foo(typename C1<T>::C2<U>::Type *) { } // { dg-error "template" "error " }
-// { dg-message "note" "note" { target *-*-* } .-1 }
+void foo(typename C1<T>::C2<U>::Type *) { }
diff --git a/gcc/testsuite/g++.dg/template/meminit2.C 
b/gcc/testsuite/g++.dg/template/meminit2.C
index db6e0427fc7..6a56a806746 100644
--- a/gcc/testsuite/g++.dg/template/meminit2.C
+++ b/gcc/testsuite/g++.dg/template/meminit2.C
@@ -14,8 +14,6 @@ struct A : typename O<T>::template I<int> {   // { dg-error 
"keyword 'typename'
template <typename T>
  struct B : O<T>::template I<int> {
-  B() :    O<T>::I<int>()   // { dg-error "used as template|it is a template" }
+  B() :    O<T>::I<int>()
    {}
  };
-
-// { dg-bogus "end of input" "bogus token skipping in the parser" { xfail 
*-*-* } 17 }
diff --git a/gcc/testsuite/g++.old-deja/g++.pt/crash38.C 
b/gcc/testsuite/g++.old-deja/g++.pt/crash38.C
index 5d386132436..60cd5e3f44e 100644
--- a/gcc/testsuite/g++.old-deja/g++.pt/crash38.C
+++ b/gcc/testsuite/g++.old-deja/g++.pt/crash38.C
@@ -3,10 +3,8 @@
template <class T>
  struct S {
-  typedef typename T::Y<T>::Z X; // { dg-error "non-template" "non-template" } 
No Y in A
-// { dg-message "note" "note" { target *-*-* } .-1 }
-// { dg-error "does not declare" "not declare" { target *-*-* } .-2 }
-  X x; // { dg-error "does not name a type" } No Y in A
+  typedef typename T::Y<T>::Z X; // { dg-error "not a class template" } No Y 
in A
+  X x;
  };
struct A {

base-commit: c2211a60ff05b7a0289d3e287e72c181bb4d5d8b


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