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re PR c++/16002 (Strange error message with new parser)

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PR c++/16002
	* parser.c (cp_parser_simple_declaration): Commit to tentative
	parses after seeing a decl-specifier.
	(cp_parser_simple_declaration): Eliminate spurious message.
	(cp_parser_init_declarator): Adjust error message.

	PR c++/16029
	* lex.c (unqualified_name_lookup_error): Mark the dummy
	declaration as used.

	PR c++/16002
	* g++.dg/template/error18.C: New test.

	PR c++/16029
	* g++.dg/warn/Wunused-8.C: New test.

From-SVN: r87633
This commit is contained in:
Mark Mitchell 2004-09-17 07:01:11 +00:00 committed by Mark Mitchell
parent 275a418708
commit 996c2b5248
6 changed files with 51 additions and 2 deletions
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10
gcc/cp/ChangeLog
View File

@ -1,5 +1,15 @@
2004-09-16 Mark Mitchell <mark@codesourcery.com>
PR c++/16002
* parser.c (cp_parser_simple_declaration): Commit to tentative
parses after seeing a decl-specifier.
(cp_parser_simple_declaration): Eliminate spurious message.
(cp_parser_init_declarator): Adjust error message.
PR c++/16029
* lex.c (unqualified_name_lookup_error): Mark the dummy
declaration as used.
PR c++/17501
* parser.c (cp_parser_nested_name_specifier): Do not resolve
typename types if the user explicitly said "typename".

3
gcc/cp/lex.c
View File

@ -572,6 +572,9 @@ unqualified_name_lookup_error (tree name)
decl = build_decl (VAR_DECL, name, error_mark_node);
DECL_CONTEXT (decl) = current_function_decl;
push_local_binding (name, decl, 0);
/* Mark the variable as used so that we do not get warnings
about it being unused later. */
TREE_USED (decl) = 1;
}
}

16
gcc/cp/parser.c
View File

@ -7026,6 +7026,13 @@ cp_parser_simple_declaration (cp_parser* parser,
/* Give up. */
goto done;
}
/* If we have seen at least one decl-specifier, and the next token
is not a parenthesis, then we must be looking at a declaration.
(After "int (" we might be looking at a functional cast.) */
if (decl_specifiers.any_specifiers_p
&& cp_lexer_next_token_is_not (parser->lexer, CPP_OPEN_PAREN))
cp_parser_commit_to_tentative_parse (parser);
/* Keep going until we hit the `;' at the end of the simple
declaration. */
@ -7079,7 +7086,12 @@ cp_parser_simple_declaration (cp_parser* parser,
/* Anything else is an error. */
else
{
cp_parser_error (parser, "expected `,' or `;'");
/* If we have already issued an error message we don't need
to issue another one. */
if (decl != error_mark_node
|| (cp_parser_parsing_tentatively (parser)
&& !cp_parser_committed_to_tentative_parse (parser)))
cp_parser_error (parser, "expected `,' or `;'");
/* Skip tokens until we reach the end of the statement. */
cp_parser_skip_to_end_of_statement (parser);
/* If the next token is now a `;', consume it. */
@ -10641,7 +10653,7 @@ cp_parser_init_declarator (cp_parser* parser,
&& token->type != CPP_COMMA
&& token->type != CPP_SEMICOLON)
{
cp_parser_error (parser, "expected init-declarator");
cp_parser_error (parser, "expected initializer");
return error_mark_node;
}

8
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,11 @@
2004-09-17 Mark Mitchell <mark@codesourcery.com>
PR c++/16002
* g++.dg/template/error18.C: New test.
PR c++/16029
* g++.dg/warn/Wunused-8.C: New test.
2004-09-17 Steven Bosscher <stevenb@suse.de>
PR tree-optimization/17513

7
gcc/testsuite/g++.dg/parse/error18.C Normal file
View File

@ -0,0 +1,7 @@
// PR c++/16002
void f()
{
double Q *= 5.0; // { dg-error "initializer" }
}

9
gcc/testsuite/g++.dg/warn/Wunused-8.C Normal file
View File

@ -0,0 +1,9 @@
// PR c++/16029
// { dg-options "-Wunused" }
int main ()
{
// We should not see an "unused" warning about "whatever" on the
// next line.
return whatever (); // { dg-error "declared" }
}