PR c++/27102
* class.c (currently_open_class): Tidy.
* decl.c (grokdeclarator): If we encounter an erroneous
declarator, assume that we have already issued an error message
and return. Return error_mark_node instead of NULL_TREE in more
places. Issue errors about function definitions that do not have
a function declarator. Check for complete types for all function
definitions.
* cp-tree.h (cp_error_declarator): Remove.
(currently_open_class): Change return type.
* parser.c (cp_parser_id_expression): Add optional_p parameter.
(cp_parser_parse_diagnose_invalid_type_name): Adjust calls.
(cp_parser_id_expression): Likewise.
(cp_parser_unqualified_id): If the name is optional, return
NULL_TREE.
(cp_parser_postfix_dot_deref_expression): Adjust calls.
(cp_parser_type_parameter): Likewise.
(cp_parser_unqualified_id): Likewise.
(cp_parser_direct_declarator): Likewise.
(cp_parser_declarator_id): Add optional_p parameter.
(cp_parser_function_definition_from_specifiers_and_declarator):
Assume that start_function indicates failure only if it has issued
an error.
(cp_parser_omp_var_list_no_open): Adjust calls.
PR c++/27102
* g++.dg/template/crash35.C: Tweak error markers.
* g++.dg/template/crash46.C: New test.
* g++.old-deja/g++.brendan/friend4.C: Tweak error markers.
* g++.old-deja/g++.pt/incomplete1.C: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@113081 138bc75d-0d04-0410-961f-82ee72b054a4