decl.c (grokfndecl): Handle separately <inline> and <constexpr> error messages.

/cp
2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grokfndecl): Handle separately <inline> and <constexpr>
	error messages.

	* decl.c (grokdeclarator): Declare typedef_p and use it everywhere.

/testsuite
2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/cpp0x/constexpr-friend-2.C: New.
	* g++.dg/cpp0x/constexpr-main.C: Likewise.

From-SVN: r197097

5 files changed, 43 insertions, 17 deletions

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 6aaf1dd..3dfb31a 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,10 @@
+2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* decl.c (grokfndecl): Handle separately <inline> and <constexpr>
+	error messages.
+
+	* decl.c (grokdeclarator): Declare typedef_p and use it everywhere.
+
 2013-03-25  Jason Merrill  <jason@redhat.com>
 
 	PR c++/56699
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 2e5910c..a821328 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -7427,13 +7427,16 @@ grokfndecl (tree ctype,
 	      return NULL_TREE;
 	    }
 
+	  if (inlinep & 1)
+	    error ("%<inline%> is not allowed in declaration of friend "
+		   "template specialization %qD",
+		   decl);
+	  if (inlinep & 2)
+	    error ("%<constexpr%> is not allowed in declaration of friend "
+		   "template specialization %qD",
+		   decl);
 	  if (inlinep)
-	    {
-	      error ("%<inline%> is not allowed in declaration of friend "
-		     "template specialization %qD",
-		     decl);
-	      return NULL_TREE;
-	    }
+	    return NULL_TREE;
 	}
     }
 
@@ -7472,8 +7475,10 @@ grokfndecl (tree ctype,
     {
       if (PROCESSING_REAL_TEMPLATE_DECL_P())
 	error ("cannot declare %<::main%> to be a template");
-      if (inlinep)
+      if (inlinep & 1)
 	error ("cannot declare %<::main%> to be inline");
+      if (inlinep & 2)
+	error ("cannot declare %<::main%> to be constexpr");
       if (!publicp)
 	error ("cannot declare %<::main%> to be static");
       inlinep = 0;
@@ -8651,6 +8656,7 @@ grokdeclarator (const cp_declarator *declarator,
   bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
   bool template_type_arg = false;
   bool template_parm_flag = false;
+  bool typedef_p = decl_spec_seq_has_spec_p (declspecs, ds_typedef);
   bool constexpr_p = decl_spec_seq_has_spec_p (declspecs, ds_constexpr);
   source_location saved_loc = input_location;
   const char *errmsg;
@@ -8862,7 +8868,7 @@ grokdeclarator (const cp_declarator *declarator,
 
   if (dname && IDENTIFIER_OPNAME_P (dname))
     {
-      if (decl_spec_seq_has_spec_p (declspecs, ds_typedef))
+      if (typedef_p)
 	{
 	  error ("declaration of %qD as %<typedef%>", dname);
 	  return error_mark_node;
@@ -8900,7 +8906,7 @@ grokdeclarator (const cp_declarator *declarator,
   if (name == NULL)
     name = decl_context == PARM ? "parameter" : "type name";
 
-  if (constexpr_p && decl_spec_seq_has_spec_p (declspecs, ds_typedef))
+  if (constexpr_p && typedef_p)
     {
       error ("%<constexpr%> cannot appear in a typedef declaration");
       return error_mark_node;
@@ -9198,7 +9204,7 @@ grokdeclarator (const cp_declarator *declarator,
   /* Issue errors about use of storage classes for parameters.  */
   if (decl_context == PARM)
     {
-      if (decl_spec_seq_has_spec_p (declspecs, ds_typedef))
+      if (typedef_p)
 	{
 	  error ("typedef declaration invalid in parameter declaration");
 	  return error_mark_node;
@@ -9242,7 +9248,7 @@ grokdeclarator (const cp_declarator *declarator,
       && ((storage_class
 	   && storage_class != sc_extern
 	   && storage_class != sc_static)
-	  || decl_spec_seq_has_spec_p (declspecs, ds_typedef)))
+	  || typedef_p))
     {
       error ("multiple storage classes in declaration of %qs", name);
       thread_p = false;
@@ -9256,7 +9262,7 @@ grokdeclarator (const cp_declarator *declarator,
 	  && (storage_class == sc_register
 	      || storage_class == sc_auto))
 	;
-      else if (decl_spec_seq_has_spec_p (declspecs, ds_typedef))
+      else if (typedef_p)
 	;
       else if (decl_context == FIELD
 	       /* C++ allows static class elements.  */
@@ -9866,8 +9872,7 @@ grokdeclarator (const cp_declarator *declarator,
 	      return error_mark_node;
 	    }
 	}
-      else if (decl_spec_seq_has_spec_p (declspecs, ds_typedef)
-	       && current_class_type)
+      else if (typedef_p && current_class_type)
 	{
 	  error ("cannot declare member %<%T::%s%> within %qT",
 		 ctype, name, current_class_type);
@@ -9944,8 +9949,7 @@ grokdeclarator (const cp_declarator *declarator,
 	  error ("non-member %qs cannot be declared %<mutable%>", name);
 	  storage_class = sc_none;
 	}
-      else if (decl_context == TYPENAME
-	       || decl_spec_seq_has_spec_p (declspecs, ds_typedef))
+      else if (decl_context == TYPENAME || typedef_p)
 	{
 	  error ("non-object member %qs cannot be declared %<mutable%>", name);
 	  storage_class = sc_none;
@@ -9975,7 +9979,7 @@ grokdeclarator (const cp_declarator *declarator,
     }
 
   /* If this is declaring a typedef name, return a TYPE_DECL.  */
-  if (decl_spec_seq_has_spec_p (declspecs, ds_typedef) && decl_context != TYPENAME)
+  if (typedef_p && decl_context != TYPENAME)
     {
       tree decl;
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 46ad1ec..52a1a8d 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	* g++.dg/cpp0x/constexpr-friend-2.C: New.
+	* g++.dg/cpp0x/constexpr-main.C: Likewise.
+
 2013-03-25  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/56722
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-friend-2.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-friend-2.C
new file mode 100644
index 0000000..36799b4
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-friend-2.C
@@ -0,0 +1,7 @@
+// { dg-do compile { target c++11 } }
+
+template<typename T> void f(T);
+
+template <class T> class A {
+  friend constexpr void f<>(int);  // { dg-error "'constexpr' is not allowed" }
+};
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-main.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-main.C
new file mode 100644
index 0000000..42720ad
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-main.C
@@ -0,0 +1,3 @@
+// { dg-do compile { target c++11 } }
+
+constexpr int main ();  // { dg-error "constexpr" }