gcc/cp/

	PR c++/51145
	* decl.c (check_elaborated_type_specifier): Gracefully handle
	error_mark_node.  Accept bound template template parameters.
	Update diagnostics for alias template specializations.  Update
	comment.
	* parser.c (cp_parser_elaborated_type_specifier): Use
	check_elaborated_type_specifier for simple-template-ids as well.

gcc/testsuite/

	PR c++/51145
	* g++.dg/cpp0x/alias-decl-14.C: New test.
	* g++.dg/cpp0x/alias-decl-2.C: Adjust for tests that were wrongly
	passing before.
	* g++.dg/cpp0x/alias-decl-10.C: Likewise and adjust for diagnostic
	change.
	* g++.dg/ext/attrib27.C: Adjust for diagnostic change.
	* g++.dg/lookup/struct1.C: Likewise.
	* g++.dg/parse/elab1.C: Likewise.
	* g++.dg/parse/elab2.C: Likewise.
	* g++.dg/parse/int-as-enum1.C: Likewise.
	* g++.dg/parse/typedef1.C: Likewise.
	* g++.dg/parse/typedef3.C: Likewise.
	* g++.dg/parse/typedef4.C: Likewise.
	* g++.dg/parse/typedef5.C: Likewise.
	* g++.dg/template/crash26.C: Likewise.
	* g++.dg/template/nontype4.C: Likewise.
	* g++.old-deja/g++.benjamin/typedef01.C: Likewise.
	* g++.old-deja/g++.brendan/line1.C: Likewise.
	* g++.old-deja/g++.other/elab1.C: Likewise.
	* g++.old-deja/g++.other/syntax4.C: Likewise.

From-SVN: r181653