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-rw-r--r--gcc/cp/parser.cc137
1 files changed, 103 insertions, 34 deletions
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc
index 239e6f9..21bec72c 100644
--- a/gcc/cp/parser.cc
+++ b/gcc/cp/parser.cc
@@ -2519,7 +2519,7 @@ static cp_expr cp_parser_id_expression
static cp_expr cp_parser_unqualified_id
(cp_parser *, bool, bool, bool, bool);
static tree cp_parser_nested_name_specifier_opt
- (cp_parser *, bool, bool, bool, bool, bool = false);
+ (cp_parser *, bool, bool, bool, bool, bool = false, bool = false);
static tree cp_parser_nested_name_specifier
(cp_parser *, bool, bool, bool, bool);
static tree cp_parser_qualifying_entity
@@ -3091,8 +3091,8 @@ static cp_token *cp_parser_require_keyword
(cp_parser *, enum rid, required_token);
static bool cp_parser_token_starts_function_definition_p
(cp_token *);
-static bool cp_parser_next_token_starts_class_definition_p
- (cp_parser *);
+static bool cp_parser_nth_token_starts_class_definition_p
+ (cp_parser *, size_t);
static bool cp_parser_next_token_ends_template_argument_p
(cp_parser *);
static bool cp_parser_nth_token_starts_template_argument_list_p
@@ -7242,18 +7242,22 @@ check_template_keyword_in_nested_name_spec (tree name)
nested-name-specifier template [opt] simple-template-id ::
PARSER->SCOPE should be set appropriately before this function is
- called. TYPENAME_KEYWORD_P is TRUE if the `typename' keyword is in
- effect. TYPE_P is TRUE if we non-type bindings should be ignored
- in name lookups.
+ called. TYPENAME_KEYWORD_P is true if the `typename' keyword is in
+ effect. TYPE_P is true if we non-type bindings should be ignored
+ in name lookups. TEMPLATE_KEYWORD_P is true if the `template' keyword
+ was seen. GLOBAL_P is true if `::' has already been parsed.
+ TODO: This function doesn't handle the C++14 change to make `::'
+ a nested-name-specifier by itself. If it did, GLOBAL_P could probably
+ go.
Sets PARSER->SCOPE to the class (TYPE) or namespace
(NAMESPACE_DECL) specified by the nested-name-specifier, or leaves
it unchanged if there is no nested-name-specifier. Returns the new
scope iff there is a nested-name-specifier, or NULL_TREE otherwise.
- If CHECK_DEPENDENCY_P is FALSE, names are looked up in dependent scopes.
+ If CHECK_DEPENDENCY_P is false, names are looked up in dependent scopes.
- If IS_DECLARATION is TRUE, the nested-name-specifier is known to be
+ If IS_DECLARATION is true, the nested-name-specifier is known to be
part of a declaration and/or decl-specifier. */
static tree
@@ -7262,7 +7266,8 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
bool check_dependency_p,
bool type_p,
bool is_declaration,
- bool template_keyword_p /* = false */)
+ bool template_keyword_p /* = false */,
+ bool global_p /* = false */)
{
bool success = false;
cp_token_position start = 0;
@@ -7310,8 +7315,9 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
/* Spot cases that cannot be the beginning of a
nested-name-specifier. On the second and subsequent times
- through the loop, we look for the `template' keyword. */
- if (success && token->keyword == RID_TEMPLATE)
+ (or the first, if '::' has already been parsed) through the
+ loop, we look for the `template' keyword. */
+ if ((success || global_p) && token->keyword == RID_TEMPLATE)
;
/* A template-id can start a nested-name-specifier. */
else if (token->type == CPP_TEMPLATE_ID)
@@ -7359,8 +7365,11 @@ cp_parser_nested_name_specifier_opt (cp_parser *parser,
cp_parser_parse_tentatively (parser);
/* Look for the optional `template' keyword, if this isn't the
- first time through the loop. */
- if (success)
+ first time through the loop, or if we've already parsed '::';
+ this is then the
+ nested-name-specifier template [opt] simple-template-id ::
+ production. */
+ if (success || global_p)
{
template_keyword_p = cp_parser_optional_template_keyword (parser);
/* DR1710: "In a qualified-id used as the name in
@@ -11829,6 +11838,7 @@ cp_parser_lambda_expression (cp_parser* parser)
bool auto_is_implicit_function_template_parm_p
= parser->auto_is_implicit_function_template_parm_p;
bool saved_omp_array_section_p = parser->omp_array_section_p;
+ bool saved_in_targ = parser->in_template_argument_list_p;
parser->num_template_parameter_lists = 0;
parser->in_statement = 0;
@@ -11838,6 +11848,7 @@ cp_parser_lambda_expression (cp_parser* parser)
parser->implicit_template_scope = 0;
parser->auto_is_implicit_function_template_parm_p = false;
parser->omp_array_section_p = false;
+ parser->in_template_argument_list_p = false;
/* Inside the lambda, outside unevaluated context do not apply. */
cp_evaluated ev;
@@ -11892,6 +11903,7 @@ cp_parser_lambda_expression (cp_parser* parser)
parser->auto_is_implicit_function_template_parm_p
= auto_is_implicit_function_template_parm_p;
parser->omp_array_section_p = saved_omp_array_section_p;
+ parser->in_template_argument_list_p = saved_in_targ;
}
/* This lambda shouldn't have any proxies left at this point. */
@@ -16870,7 +16882,11 @@ cp_parser_decomposition_declaration (cp_parser *parser,
decl = error_mark_node;
}
else
- prev = decl2;
+ {
+ prev = decl2;
+ DECL_DECLARED_CONSTEXPR_P (decl2) = DECL_DECLARED_CONSTEXPR_P (decl);
+ DECL_DECLARED_CONSTINIT_P (decl2) = DECL_DECLARED_CONSTINIT_P (decl);
+ }
if (elt_pushed_scope)
pop_scope (elt_pushed_scope);
}
@@ -21163,7 +21179,9 @@ cp_parser_simple_type_specifier (cp_parser* parser,
/*typename_keyword_p=*/false,
/*check_dependency_p=*/true,
/*type_p=*/false,
- /*is_declaration=*/false)
+ /*is_declaration=*/false,
+ /*template_keyword_p=*/false,
+ global_p)
!= NULL_TREE);
/* If we have seen a nested-name-specifier, and the next token
is `template', then we are using the template-id production. */
@@ -22013,7 +22031,7 @@ cp_parser_elaborated_type_specifier (cp_parser* parser,
bool template_p =
(template_parm_lists_apply
- && (cp_parser_next_token_starts_class_definition_p (parser)
+ && (cp_parser_nth_token_starts_class_definition_p (parser, 1)
|| cp_lexer_next_token_is (parser->lexer, CPP_SEMICOLON)));
/* An unqualified name was used to reference this type, so
there were no qualifying templates. */
@@ -28050,6 +28068,64 @@ cp_parser_class_specifier (cp_parser* parser)
return type;
}
+/* Parse an (optional) class-property-specifier-seq.
+
+ class-property-specifier-seq:
+ class-property-specifier class-property-specifier-seq [opt]
+
+ class-property-specifier:
+ final
+
+ Returns a bitmask representing the class-property-specifiers. */
+
+static cp_virt_specifiers
+cp_parser_class_property_specifier_seq_opt (cp_parser *parser)
+{
+ cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
+
+ while (true)
+ {
+ cp_token *token;
+ cp_virt_specifiers virt_specifier;
+
+ /* Peek at the next token. */
+ token = cp_lexer_peek_token (parser->lexer);
+ /* See if it's a class-property-specifier. */
+ if (token->type != CPP_NAME)
+ break;
+ if (id_equal (token->u.value, "final"))
+ {
+ /* For C++98, quietly ignore final in e.g.
+ struct S final = 24; */
+ if (cxx_dialect == cxx98
+ && virt_specifiers == VIRT_SPEC_UNSPECIFIED
+ && !cp_parser_nth_token_starts_class_definition_p (parser, 2)
+ && !cp_lexer_nth_token_is (parser->lexer, 2, CPP_NAME))
+ break;
+ maybe_warn_cpp0x (CPP0X_OVERRIDE_CONTROLS);
+ virt_specifier = VIRT_SPEC_FINAL;
+ }
+ else if (id_equal (token->u.value, "__final"))
+ virt_specifier = VIRT_SPEC_FINAL;
+ else
+ break;
+
+ if (virt_specifiers & virt_specifier)
+ {
+ gcc_rich_location richloc (token->location);
+ richloc.add_fixit_remove ();
+ error_at (&richloc, "duplicate %qD specifier", token->u.value);
+ cp_lexer_purge_token (parser->lexer);
+ }
+ else
+ {
+ cp_lexer_consume_token (parser->lexer);
+ virt_specifiers |= virt_specifier;
+ }
+ }
+ return virt_specifiers;
+}
+
/* Parse a class-head.
class-head:
@@ -28240,18 +28316,16 @@ cp_parser_class_head (cp_parser* parser,
pop_deferring_access_checks ();
if (id)
- {
- cp_parser_check_for_invalid_template_id (parser, id,
- class_key,
- type_start_token->location);
- }
- virt_specifiers = cp_parser_virt_specifier_seq_opt (parser);
+ cp_parser_check_for_invalid_template_id (parser, id,
+ class_key,
+ type_start_token->location);
+ virt_specifiers = cp_parser_class_property_specifier_seq_opt (parser);
/* If it's not a `:' or a `{' then we can't really be looking at a
class-head, since a class-head only appears as part of a
class-specifier. We have to detect this situation before calling
xref_tag, since that has irreversible side-effects. */
- if (!cp_parser_next_token_starts_class_definition_p (parser))
+ if (!cp_parser_nth_token_starts_class_definition_p (parser, 1))
{
cp_parser_error (parser, "expected %<{%> or %<:%>");
type = error_mark_node;
@@ -28261,13 +28335,6 @@ cp_parser_class_head (cp_parser* parser,
/* At this point, we're going ahead with the class-specifier, even
if some other problem occurs. */
cp_parser_commit_to_tentative_parse (parser);
- if (virt_specifiers & VIRT_SPEC_OVERRIDE)
- {
- cp_parser_error (parser,
- "cannot specify %<override%> for a class");
- type = error_mark_node;
- goto out;
- }
/* Issue the error about the overly-qualified name now. */
if (qualified_p)
{
@@ -35636,15 +35703,15 @@ cp_parser_token_starts_function_definition_p (cp_token* token)
|| token->keyword == RID_RETURN);
}
-/* Returns TRUE iff the next token is the ":" or "{" beginning a class
+/* Returns TRUE iff the Nth token is the ":" or "{" beginning a class
definition. */
static bool
-cp_parser_next_token_starts_class_definition_p (cp_parser *parser)
+cp_parser_nth_token_starts_class_definition_p (cp_parser *parser, size_t n)
{
cp_token *token;
- token = cp_lexer_peek_token (parser->lexer);
+ token = cp_lexer_peek_nth_token (parser->lexer, n);
return (token->type == CPP_OPEN_BRACE
|| (token->type == CPP_COLON
&& !parser->colon_doesnt_start_class_def_p));
@@ -35924,7 +35991,9 @@ cp_parser_check_class_key (cp_parser *parser, location_t key_loc,
return;
bool seen_as_union = TREE_CODE (type) == UNION_TYPE;
- if (seen_as_union != (class_key == union_type))
+ if (class_key != typename_type
+ && TREE_CODE (type) != TYPENAME_TYPE
+ && seen_as_union != (class_key == union_type))
{
auto_diagnostic_group d;
if (permerror (input_location, "%qs tag used in naming %q#T",
generated by cgit v1.1 at 2025-07-10 23:42:43 +0000