decl.c (grokfndecl): If ::main is found not to return int, correct it after issuing...

decl.c (grokfndecl): If ::main is found not to return int, correct it after issuing a diagnostic.

gcc/cp:
	* decl.c (grokfndecl): If ::main is found not to return int,
	correct it after issuing a diagnostic.
	(grokdeclarator): If the incoming type was error_mark_node, do
	not complain about declaring something with no type.
	(start_function): Change check for ::main not returning int to
	an assertion, as grokfndecl now catches this when the user did it.
	* init.c (perform_member_init, sort_mem_initializers)
	(emit_mem_initializers): Make most diagnostics be issued on
	the line of current_function_decl, not whatever the current
	input line is.
	* parser.c (cp_lexer_peek_token_emit_debug_info): Surround
	definition and declaration with #ifdef ENABLE_CHECKING.
	Avoid unnecessary use of fprintf.
	(cp_lexer_print_token, cp_lexer_debug_stream): Adjust stub
	definitions to avoid warnings.
	(cp_lexer_new_main): Add assertion that first token is not a
	padding token.
	(cp_lexer_new_from_token_array): Fold into ...
	(cp_lexer_new_from_tokens): ... here.  Add assertion that
	first token is not a padding token.
	(cp_lexer_set_source_position_from_token): Move nearer to callers.
	Remove unused lexer argument.
	(cp_lexer_peek_token): Just print debugging report (if enabled)
	and return lexer->next_token.
	(cp_lexer_skip_purged_tokens): Delete.
	(cp_lexer_next_token_is, cp_lexer_next_token_is_not): Make
	inline, simplify bodies.
	(cp_lexer_peek_nth_token): Add debugging report a la
	cp_lexer_peek_token.
	(cp_lexer_consume_token): Correct commentary.  Advance over
	purged tokens here.  Set current source position here, from
	token to be returned.  Avoid unnecessary use of fprintf.
	(cp_lexer_purge_token): Advance next_token pointer over this and
	subsequent purged tokens.
	(cp_parser_error): Adjust source position to that of the
	peeked token.
	(cp_parser_push_lexer_for_tokens, cp_parser_pop_lexer): New functions.
	(cp_parser_string_literal): Remove some excessive cleverness.
	(cp_parser_enum_specifier): Call start_enum before consuming
	the opening brace.
	(cp_parser_member_declaration): Make the "extra semicolon"
	diagnostic consistently-worded with the other place this is
	diagnosed.  Explicitly set the diagnostic location to the
	location of the offending semicolon.
	(cp_parser_enclosed_template_argument_list): Use %</%> quoting
	in diagnostics.  Do not use cp_parser_require.  Set location
	of diagnostics about improper use of '>>' to location of
	offending token.
	(cp_parser_late_parsing_for_member):
	Use cp_parser_push_lexer_for_tokens and cp_parser_pop_lexer.
	(cp_parser_late_parsing_default_args): Likewise.  Manually
	move some logic outside the loop.

gcc/testsuite:
	* g++.dg/ext/complit1.C
	* g++.dg/other/error2.C
	* g++.dg/other/nontype-1.C
	* g++.dg/parse/crash11.C
	* g++.dg/parse/crash12.C
	* g++.dg/parse/error15.C
	* g++.dg/parse/error4.C
	* g++.dg/parse/tmpl-outside1.C
	* g++.dg/parse/too-many-tmpl-args1.C
	* g++.dg/template/dependent-expr3.C
	* g++.dg/template/error10.C
	* g++.dg/template/instantiate1.C
	* g++.dg/template/vtable2.C
	* g++.dg/warn/Wshadow-1.C
	* g++.dg/warn/weak1.C
	* g++.old-deja/g++.brendan/crash16.C
	* g++.old-deja/g++.brendan/crash18.C
	* g++.old-deja/g++.brendan/crash48.C
	* g++.old-deja/g++.brendan/crash49.C
	* g++.old-deja/g++.brendan/crash55.C
	* g++.old-deja/g++.brendan/crash56.C
	* g++.old-deja/g++.brendan/crash8.C
	* g++.old-deja/g++.brendan/enum11.C
	* g++.old-deja/g++.brendan/enum8.C
	* g++.old-deja/g++.brendan/enum9.C
	* g++.old-deja/g++.brendan/friend3.C
	* g++.old-deja/g++.brendan/misc14.C
	* g++.old-deja/g++.bugs/900402_02.C
	* g++.old-deja/g++.bugs/900404_03.C
	* g++.old-deja/g++.bugs/900404_04.C
	* g++.old-deja/g++.bugs/900428_03.C
	* g++.old-deja/g++.jason/crash4.C
	* g++.old-deja/g++.jason/overload21.C
	* g++.old-deja/g++.jason/redecl1.C
	* g++.old-deja/g++.jason/report.C
	* g++.old-deja/g++.jason/rfg10.C
	* g++.old-deja/g++.jason/template30.C
	* g++.old-deja/g++.law/arm12.C
	* g++.old-deja/g++.law/ctors5.C
	* g++.old-deja/g++.law/cvt20.C
	* g++.old-deja/g++.law/init10.C
	* g++.old-deja/g++.law/init8.C
	* g++.old-deja/g++.law/visibility17.C
	* g++.old-deja/g++.law/visibility7.C
	* g++.old-deja/g++.mike/net8.C
	* g++.old-deja/g++.mike/p646.C
	* g++.old-deja/g++.mike/p700.C
	* g++.old-deja/g++.mike/p701.C
	* g++.old-deja/g++.mike/p811.C
	* g++.old-deja/g++.ns/template13.C
	* g++.old-deja/g++.other/array3.C
	* g++.old-deja/g++.other/crash25.C
	* g++.old-deja/g++.other/dtor3.C
	* g++.old-deja/g++.other/dtor4.C
	* g++.old-deja/g++.other/main1.C
	* g++.old-deja/g++.other/warn7.C
	* g++.old-deja/g++.pt/crash11.C
	* g++.old-deja/g++.pt/crash36.C
	* g++.old-deja/g++.pt/spec22.C
	* g++.old-deja/g++.pt/spec9.C
	* g++.old-deja/g++.pt/ttp52.C
	* g++.old-deja/g++.robertl/eb103.C
	* g++.old-deja/g++.robertl/eb121.C
	* g++.old-deja/g++.robertl/eb22.C
	* g++.old-deja/g++.robertl/eb8.C:
	Update locations and/or regexps of dg-error markers.
	Remove markers for some bogus messages that are no longer issued.

libstdc++-v3:
	* testsuite/20_util/memory/auto_ptr/assign_neg.cc
	* testsuite/23_containers/map/operators/1_neg.cc
	* testsuite/23_containers/set/operators/1_neg.cc:
	Update locations and/or regexps of dg-error markers.

From-SVN: r87985