/* Parser for C and Objective-C.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Parser actions based on the old Bison parser; structure somewhat
#include "c-tree.h"
#include "flags.h"
#include "output.h"
-#include "toplev.h"
#include "ggc.h"
#include "c-family/c-common.h"
+#include "c-family/c-objc.h"
#include "vec.h"
#include "target.h"
#include "cgraph.h"
/* We found an Objective-C "pq" keyword (in, out,
inout, bycopy, byref, oneway). They need special
care because the interpretation depends on the
- context.
- */
+ context. */
if (parser->objc_pq_context)
{
token->type = CPP_KEYWORD;
you can't use 'in' as the name of the running
variable in a C for loop. We could potentially
try to add code here to disambiguate, but it
- seems a reasonable limitation.
- */
+ seems a reasonable limitation. */
token->type = CPP_KEYWORD;
token->keyword = rid_code;
break;
}
/* Else, "pq" keywords outside of the "pq" context are
not keywords, and we fall through to the code for
- normal tokens.
- */
+ normal tokens. */
}
else if (c_dialect_objc () && OBJC_IS_PATTR_KEYWORD (rid_code))
{
- /* We found an Objective-C "property attribute" keyword
- (readonly, copies, getter, setter, ivar). These are
+ /* We found an Objective-C "property attribute"
+ keyword (getter, setter, readonly, etc). These are
only valid in the property context. */
if (parser->objc_property_attr_context)
{
protected, public, try, catch, throw) without a
preceding '@' sign. Do nothing and fall through to
the code for normal tokens (in C++ we would still
- consider the CXX ones keywords, but not in C).
- */
+ consider the CXX ones keywords, but not in C). */
;
}
else
return c_parser_peek_token (parser)->keyword == keyword;
}
+/* Return a pointer to the next-but-one token from PARSER, reading it
+ in if necessary. The next token is already read in. */
+
+static c_token *
+c_parser_peek_2nd_token (c_parser *parser)
+{
+ if (parser->tokens_avail >= 2)
+ return &parser->tokens[1];
+ gcc_assert (parser->tokens_avail == 1);
+ gcc_assert (parser->tokens[0].type != CPP_EOF);
+ gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
+ c_lex_one_token (parser, &parser->tokens[1]);
+ parser->tokens_avail = 2;
+ return &parser->tokens[1];
+}
+
/* Return true if TOKEN can start a type name,
false otherwise. */
static bool
}
}
+enum c_lookahead_kind {
+ /* Always treat unknown identifiers as typenames. */
+ cla_prefer_type,
+
+ /* Could be parsing a nonabstract declarator. Only treat an identifier
+ as a typename if followed by another identifier or a star. */
+ cla_nonabstract_decl,
+
+ /* Never treat identifiers as typenames. */
+ cla_prefer_id
+};
+
/* Return true if the next token from PARSER can start a type name,
+ false otherwise. LA specifies how to do lookahead in order to
+ detect unknown type names. If unsure, pick CLA_PREFER_ID. */
+
+static inline bool
+c_parser_next_tokens_start_typename (c_parser *parser, enum c_lookahead_kind la)
+{
+ c_token *token = c_parser_peek_token (parser);
+ if (c_token_starts_typename (token))
+ return true;
+
+ /* Try a bit harder to detect an unknown typename. */
+ if (la != cla_prefer_id
+ && token->type == CPP_NAME
+ && token->id_kind == C_ID_ID
+
+ /* Do not try too hard when we could have "object in array". */
+ && !parser->objc_could_be_foreach_context
+
+ && (la == cla_prefer_type
+ || c_parser_peek_2nd_token (parser)->type == CPP_NAME
+ || c_parser_peek_2nd_token (parser)->type == CPP_MULT)
+
+ /* Only unknown identifiers. */
+ && !lookup_name (token->value))
+ return true;
+
+ return false;
+}
+
+/* Return true if TOKEN is a type qualifier, false otherwise. */
+static bool
+c_token_is_qualifier (c_token *token)
+{
+ switch (token->type)
+ {
+ case CPP_NAME:
+ switch (token->id_kind)
+ {
+ case C_ID_ADDRSPACE:
+ return true;
+ default:
+ return false;
+ }
+ case CPP_KEYWORD:
+ switch (token->keyword)
+ {
+ case RID_CONST:
+ case RID_VOLATILE:
+ case RID_RESTRICT:
+ case RID_ATTRIBUTE:
+ return true;
+ default:
+ return false;
+ }
+ case CPP_LESS:
+ return false;
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Return true if the next token from PARSER is a type qualifier,
false otherwise. */
static inline bool
-c_parser_next_token_starts_typename (c_parser *parser)
+c_parser_next_token_is_qualifier (c_parser *parser)
{
c_token *token = c_parser_peek_token (parser);
- return c_token_starts_typename (token);
+ return c_token_is_qualifier (token);
}
/* Return true if TOKEN can start declaration specifiers, false
return false;
}
-static c_token *c_parser_peek_2nd_token (c_parser *parser);
-
/* Return true if the next token from PARSER can start declaration
specifiers, false otherwise. */
static inline bool
c_parser_next_token_starts_declspecs (c_parser *parser)
{
c_token *token = c_parser_peek_token (parser);
+
+ /* In Objective-C, a classname normally starts a declspecs unless it
+ is immediately followed by a dot. In that case, it is the
+ Objective-C 2.0 "dot-syntax" for class objects, ie, calls the
+ setter/getter on the class. c_token_starts_declspecs() can't
+ differentiate between the two cases because it only checks the
+ current token, so we have a special check here. */
+ if (c_dialect_objc ()
+ && token->type == CPP_NAME
+ && token->id_kind == C_ID_CLASSNAME
+ && c_parser_peek_2nd_token (parser)->type == CPP_DOT)
+ return false;
+
return c_token_starts_declspecs (token);
}
-/* Return true if the next token from PARSER can start declaration
+/* Return true if the next tokens from PARSER can start declaration
specifiers or a static assertion, false otherwise. */
static inline bool
-c_parser_next_token_starts_declaration (c_parser *parser)
+c_parser_next_tokens_start_declaration (c_parser *parser)
{
c_token *token = c_parser_peek_token (parser);
- return c_token_starts_declaration (token);
-}
-/* Return a pointer to the next-but-one token from PARSER, reading it
- in if necessary. The next token is already read in. */
+ /* Same as above. */
+ if (c_dialect_objc ()
+ && token->type == CPP_NAME
+ && token->id_kind == C_ID_CLASSNAME
+ && c_parser_peek_2nd_token (parser)->type == CPP_DOT)
+ return false;
-static c_token *
-c_parser_peek_2nd_token (c_parser *parser)
-{
- if (parser->tokens_avail >= 2)
- return &parser->tokens[1];
- gcc_assert (parser->tokens_avail == 1);
- gcc_assert (parser->tokens[0].type != CPP_EOF);
- gcc_assert (parser->tokens[0].type != CPP_PRAGMA_EOL);
- c_lex_one_token (parser, &parser->tokens[1]);
- parser->tokens_avail = 2;
- return &parser->tokens[1];
+ /* Labels do not start declarations. */
+ if (token->type == CPP_NAME
+ && c_parser_peek_2nd_token (parser)->type == CPP_COLON)
+ return false;
+
+ if (c_token_starts_declaration (token))
+ return true;
+
+ if (c_parser_next_tokens_start_typename (parser, cla_nonabstract_decl))
+ return true;
+
+ return false;
}
/* Consume the next token from PARSER. */
static void c_parser_static_assert_declaration_no_semi (c_parser *);
static void c_parser_static_assert_declaration (c_parser *);
static void c_parser_declspecs (c_parser *, struct c_declspecs *, bool, bool,
- bool);
+ bool, enum c_lookahead_kind);
static struct c_typespec c_parser_enum_specifier (c_parser *);
static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
static tree c_parser_struct_declaration (c_parser *);
static tree c_parser_objc_method_decl (c_parser *, bool, tree *);
static tree c_parser_objc_type_name (c_parser *);
static tree c_parser_objc_protocol_refs (c_parser *);
-static void c_parser_objc_try_catch_statement (c_parser *);
+static void c_parser_objc_try_catch_finally_statement (c_parser *);
static void c_parser_objc_synchronized_statement (c_parser *);
static tree c_parser_objc_selector (c_parser *);
static tree c_parser_objc_selector_arg (c_parser *);
static tree c_parser_objc_receiver (c_parser *);
static tree c_parser_objc_message_args (c_parser *);
static tree c_parser_objc_keywordexpr (c_parser *);
-static void c_parser_objc_at_property (c_parser *) ;
+static void c_parser_objc_at_property_declaration (c_parser *);
static void c_parser_objc_at_synthesize_declaration (c_parser *);
static void c_parser_objc_at_dynamic_declaration (c_parser *);
static bool c_parser_objc_diagnose_bad_element_prefix
break;
case RID_AT_PROPERTY:
gcc_assert (c_dialect_objc ());
- c_parser_objc_at_property (parser);
+ c_parser_objc_at_property_declaration (parser);
break;
case RID_AT_SYNTHESIZE:
gcc_assert (c_dialect_objc ());
return;
}
specs = build_null_declspecs ();
- c_parser_declspecs (parser, specs, true, true, start_attr_ok);
+
+ /* Try to detect an unknown type name when we have "A B" or "A *B". */
+ if (c_parser_peek_token (parser)->type == CPP_NAME
+ && c_parser_peek_token (parser)->id_kind == C_ID_ID
+ && (c_parser_peek_2nd_token (parser)->type == CPP_NAME
+ || c_parser_peek_2nd_token (parser)->type == CPP_MULT)
+ && (!nested || !lookup_name (c_parser_peek_token (parser)->value)))
+ {
+ error_at (here, "unknown type name %qE",
+ c_parser_peek_token (parser)->value);
+
+ /* Parse declspecs normally to get a correct pointer type, but avoid
+ a further "fails to be a type name" error. Refuse nested functions
+ since it is not how the user likely wants us to recover. */
+ c_parser_peek_token (parser)->type = CPP_KEYWORD;
+ c_parser_peek_token (parser)->keyword = RID_VOID;
+ c_parser_peek_token (parser)->value = error_mark_node;
+ fndef_ok = !nested;
+ }
+
+ c_parser_declspecs (parser, specs, true, true, start_attr_ok, cla_nonabstract_decl);
if (parser->error)
{
c_parser_skip_to_end_of_block_or_statement (parser);
c_parser_consume_token (parser);
return;
}
+
+ /* Provide better error recovery. Note that a type name here is usually
+ better diagnosed as a redeclaration. */
+ if (empty_ok
+ && specs->typespec_kind == ctsk_tagdef
+ && c_parser_next_token_starts_declspecs (parser)
+ && !c_parser_next_token_is (parser, CPP_NAME))
+ {
+ c_parser_error (parser, "expected %<;%>, identifier or %<(%>");
+ parser->error = false;
+ shadow_tag_warned (specs, 1);
+ return;
+ }
else if (c_dialect_objc ())
{
/* Prefix attributes are an error on method decls. */
case RID_AT_PROPERTY:
if (specs->attrs)
{
- c_parser_error (parser,
- "attributes may not be specified before" );
+ c_parser_error (parser, "unexpected attribute");
specs->attrs = NULL;
}
break;
should diagnose if there were no declaration specifiers) or a
function definition (in which case the diagnostic for
implicit int suffices). */
- declarator = c_parser_declarator (parser, specs->type_seen_p,
+ declarator = c_parser_declarator (parser,
+ specs->typespec_kind != ctsk_none,
C_DTR_NORMAL, &dummy);
if (declarator == NULL)
{
static void
c_parser_declspecs (c_parser *parser, struct c_declspecs *specs,
- bool scspec_ok, bool typespec_ok, bool start_attr_ok)
+ bool scspec_ok, bool typespec_ok, bool start_attr_ok,
+ enum c_lookahead_kind la)
{
bool attrs_ok = start_attr_ok;
- bool seen_type = specs->type_seen_p;
+ bool seen_type = specs->typespec_kind != ctsk_none;
+
+ if (!typespec_ok)
+ gcc_assert (la == cla_prefer_id);
+
while (c_parser_next_token_is (parser, CPP_NAME)
|| c_parser_next_token_is (parser, CPP_KEYWORD)
|| (c_dialect_objc () && c_parser_next_token_is (parser, CPP_LESS)))
struct c_typespec t;
tree attrs;
location_t loc = c_parser_peek_token (parser)->location;
+
+ /* If we cannot accept a type, exit if the next token must start
+ one. Also, if we already have seen a tagged definition,
+ a typename would be an error anyway and likely the user
+ has simply forgotten a semicolon, so we exit. */
+ if ((!typespec_ok || specs->typespec_kind == ctsk_tagdef)
+ && c_parser_next_tokens_start_typename (parser, la)
+ && !c_parser_next_token_is_qualifier (parser))
+ break;
+
if (c_parser_next_token_is (parser, CPP_NAME))
{
tree value = c_parser_peek_token (parser)->value;
continue;
}
- /* This finishes the specifiers unless a type name is OK, it
- is declared as a type name and a type name hasn't yet
- been seen. */
- if (!typespec_ok || seen_type
- || (kind != C_ID_TYPENAME && kind != C_ID_CLASSNAME))
+ gcc_assert (!c_parser_next_token_is_qualifier (parser));
+
+ /* If we cannot accept a type, and the next token must start one,
+ exit. Do the same if we already have seen a tagged definition,
+ since it would be an error anyway and likely the user has simply
+ forgotten a semicolon. */
+ if (seen_type || !c_parser_next_tokens_start_typename (parser, la))
break;
+
+ /* Now at an unknown typename (C_ID_ID), a C_ID_TYPENAME or
+ a C_ID_CLASSNAME. */
c_parser_consume_token (parser);
seen_type = true;
attrs_ok = true;
- if (kind == C_ID_TYPENAME
- && (!c_dialect_objc ()
- || c_parser_next_token_is_not (parser, CPP_LESS)))
+ if (kind == C_ID_ID)
+ {
+ error ("unknown type name %qE", value);
+ t.kind = ctsk_typedef;
+ t.spec = error_mark_node;
+ }
+ else if (kind == C_ID_TYPENAME
+ && (!c_dialect_objc ()
+ || c_parser_next_token_is_not (parser, CPP_LESS)))
{
t.kind = ctsk_typedef;
/* For a typedef name, record the meaning, not the name.
In case of 'foo foo, bar;'. */
t.spec = lookup_name (value);
- t.expr = NULL_TREE;
- t.expr_const_operands = true;
}
else
{
if (c_parser_next_token_is (parser, CPP_LESS))
proto = c_parser_objc_protocol_refs (parser);
t.spec = objc_get_protocol_qualified_type (value, proto);
- t.expr = NULL_TREE;
- t.expr_const_operands = true;
}
+ t.expr = NULL_TREE;
+ t.expr_const_operands = true;
declspecs_add_type (loc, specs, t);
continue;
}
if (c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
pedwarn (c_parser_peek_token (parser)->location, 0,
"no semicolon at end of struct or union");
- else
+ else if (parser->error
+ || !c_parser_next_token_starts_declspecs (parser))
{
c_parser_error (parser, "expected %<;%>");
c_parser_skip_until_found (parser, CPP_CLOSE_BRACE, NULL);
break;
}
+
+ /* If we come here, we have already emitted an error
+ for an expected `;', identifier or `(', and we also
+ recovered already. Go on with the next field. */
}
}
postfix_attrs = c_parser_attributes (parser);
}
specs = build_null_declspecs ();
decl_loc = c_parser_peek_token (parser)->location;
- c_parser_declspecs (parser, specs, false, true, true);
+ c_parser_declspecs (parser, specs, false, true, true, cla_nonabstract_decl);
if (parser->error)
return NULL_TREE;
if (!specs->declspecs_seen_p)
return NULL_TREE;
}
finish_declspecs (specs);
- if (c_parser_next_token_is (parser, CPP_SEMICOLON))
+ if (c_parser_next_token_is (parser, CPP_SEMICOLON)
+ || c_parser_next_token_is (parser, CPP_CLOSE_BRACE))
{
tree ret;
- if (!specs->type_seen_p)
+ if (specs->typespec_kind == ctsk_none)
{
pedwarn (decl_loc, OPT_pedantic,
"ISO C forbids member declarations with no members");
}
return ret;
}
+
+ /* Provide better error recovery. Note that a type name here is valid,
+ and will be treated as a field name. */
+ if (specs->typespec_kind == ctsk_tagdef
+ && TREE_CODE (specs->type) != ENUMERAL_TYPE
+ && c_parser_next_token_starts_declspecs (parser)
+ && !c_parser_next_token_is (parser, CPP_NAME))
+ {
+ c_parser_error (parser, "expected %<;%>, identifier or %<(%>");
+ parser->error = false;
+ return NULL_TREE;
+ }
+
pending_xref_error ();
prefix_attrs = specs->attrs;
all_prefix_attrs = prefix_attrs;
if (c_parser_next_token_is (parser, CPP_COLON))
declarator = build_id_declarator (NULL_TREE);
else
- declarator = c_parser_declarator (parser, specs->type_seen_p,
+ declarator = c_parser_declarator (parser,
+ specs->typespec_kind != ctsk_none,
C_DTR_NORMAL, &dummy);
if (declarator == NULL)
{
in_typeof--;
return ret;
}
- if (c_parser_next_token_starts_typename (parser))
+ if (c_parser_next_tokens_start_typename (parser, cla_prefer_id))
{
struct c_type_name *type = c_parser_type_name (parser);
c_inhibit_evaluation_warnings--;
error_at (here, "%<typeof%> applied to a bit-field");
mark_exp_read (expr.value);
ret.spec = TREE_TYPE (expr.value);
- if (c_dialect_objc()
- && ret.spec != error_mark_node
- && lookup_attribute ("objc_volatilized", TYPE_ATTRIBUTES (ret.spec)))
- ret.spec = build_qualified_type
- (ret.spec, (TYPE_QUALS (ret.spec) & ~TYPE_QUAL_VOLATILE));
was_vm = variably_modified_type_p (ret.spec, NULL_TREE);
/* This is returned with the type so that when the type is
evaluated, this can be evaluated. */
struct c_declspecs *quals_attrs = build_null_declspecs ();
struct c_declarator *inner;
c_parser_consume_token (parser);
- c_parser_declspecs (parser, quals_attrs, false, false, true);
+ c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
inner = c_parser_declarator (parser, type_seen_p, kind, seen_id);
if (inner == NULL)
return NULL;
bool star_seen;
tree dimen;
c_parser_consume_token (parser);
- c_parser_declspecs (parser, quals_attrs, false, false, true);
+ c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
static_seen = c_parser_next_token_is_keyword (parser, RID_STATIC);
if (static_seen)
c_parser_consume_token (parser);
if (static_seen && !quals_attrs->declspecs_seen_p)
- c_parser_declspecs (parser, quals_attrs, false, false, true);
+ c_parser_declspecs (parser, quals_attrs, false, false, true, cla_prefer_id);
if (!quals_attrs->declspecs_seen_p)
quals_attrs = NULL;
/* If "static" is present, there must be an array dimension.
if (id_list_ok
&& !attrs
&& c_parser_next_token_is (parser, CPP_NAME)
- && c_parser_peek_token (parser)->id_kind == C_ID_ID)
+ && c_parser_peek_token (parser)->id_kind == C_ID_ID
+
+ /* Look ahead to detect typos in type names. */
+ && c_parser_peek_2nd_token (parser)->type != CPP_NAME
+ && c_parser_peek_2nd_token (parser)->type != CPP_MULT
+ && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_PAREN
+ && c_parser_peek_2nd_token (parser)->type != CPP_OPEN_SQUARE)
{
tree list = NULL_TREE, *nextp = &list;
while (c_parser_next_token_is (parser, CPP_NAME)
if (parser->error)
return NULL;
c_parser_set_source_position_from_token (token);
- if (token->type == CPP_NAME
- && c_parser_peek_2nd_token (parser)->type != CPP_COMMA
- && c_parser_peek_2nd_token (parser)->type != CPP_CLOSE_PAREN)
+ if (c_parser_next_tokens_start_typename (parser, cla_prefer_type))
{
error ("unknown type name %qE", token->value);
parser->error = true;
declspecs_add_attrs (specs, attrs);
attrs = NULL_TREE;
}
- c_parser_declspecs (parser, specs, true, true, true);
+ c_parser_declspecs (parser, specs, true, true, true, cla_nonabstract_decl);
finish_declspecs (specs);
pending_xref_error ();
prefix_attrs = specs->attrs;
specs->attrs = NULL_TREE;
- declarator = c_parser_declarator (parser, specs->type_seen_p,
+ declarator = c_parser_declarator (parser,
+ specs->typespec_kind != ctsk_none,
C_DTR_PARM, &dummy);
if (declarator == NULL)
{
/* Parse the attribute contents. If they start with an
identifier which is followed by a comma or close
parenthesis, then the arguments start with that
- identifier; otherwise they are an expression list. */
+ identifier; otherwise they are an expression list.
+ In objective-c the identifier may be a classname. */
if (c_parser_next_token_is (parser, CPP_NAME)
- && c_parser_peek_token (parser)->id_kind == C_ID_ID
+ && (c_parser_peek_token (parser)->id_kind == C_ID_ID
+ || (c_dialect_objc ()
+ && c_parser_peek_token (parser)->id_kind == C_ID_CLASSNAME))
&& ((c_parser_peek_2nd_token (parser)->type == CPP_COMMA)
|| (c_parser_peek_2nd_token (parser)->type
== CPP_CLOSE_PAREN)))
struct c_declarator *declarator;
struct c_type_name *ret;
bool dummy = false;
- c_parser_declspecs (parser, specs, false, true, true);
+ c_parser_declspecs (parser, specs, false, true, true, cla_prefer_type);
if (!specs->declspecs_seen_p)
{
c_parser_error (parser, "expected specifier-qualifier-list");
return NULL;
}
- pending_xref_error ();
- finish_declspecs (specs);
- declarator = c_parser_declarator (parser, specs->type_seen_p,
+ if (specs->type != error_mark_node)
+ {
+ pending_xref_error ();
+ finish_declspecs (specs);
+ }
+ declarator = c_parser_declarator (parser,
+ specs->typespec_kind != ctsk_none,
C_DTR_ABSTRACT, &dummy);
if (declarator == NULL)
return NULL;
c_parser_label (parser);
}
else if (!last_label
- && c_parser_next_token_starts_declaration (parser))
+ && c_parser_next_tokens_start_declaration (parser))
{
last_label = false;
mark_valid_location_for_stdc_pragma (false);
}
if (label)
{
- if (c_parser_next_token_starts_declaration (parser)
- && !(c_parser_next_token_is (parser, CPP_NAME)
- && c_parser_peek_2nd_token (parser)->type == CPP_COLON))
+ if (c_parser_next_tokens_start_declaration (parser))
{
error_at (c_parser_peek_token (parser)->location,
"a label can only be part of a statement and "
break;
case RID_AT_TRY:
gcc_assert (c_dialect_objc ());
- c_parser_objc_try_catch_statement (parser);
+ c_parser_objc_try_catch_finally_statement (parser);
break;
case RID_AT_SYNCHRONIZED:
gcc_assert (c_dialect_objc ());
{
tree block, cond, incr, save_break, save_cont, body;
/* The following are only used when parsing an ObjC foreach statement. */
- tree object_expression, collection_expression;
+ tree object_expression;
+ /* Silence the bogus uninitialized warning. */
+ tree collection_expression = NULL;
location_t loc = c_parser_peek_token (parser)->location;
location_t for_loc = c_parser_peek_token (parser)->location;
bool is_foreach_statement = false;
{
/* Parse the initialization declaration or expression. */
object_expression = error_mark_node;
+ parser->objc_could_be_foreach_context = c_dialect_objc ();
if (c_parser_next_token_is (parser, CPP_SEMICOLON))
{
+ parser->objc_could_be_foreach_context = false;
c_parser_consume_token (parser);
c_finish_expr_stmt (loc, NULL_TREE);
}
- else if (c_parser_next_token_starts_declaration (parser))
+ else if (c_parser_next_tokens_start_declaration (parser))
{
- parser->objc_could_be_foreach_context = true;
c_parser_declaration_or_fndef (parser, true, true, true, true, true,
&object_expression);
parser->objc_could_be_foreach_context = false;
int ext;
ext = disable_extension_diagnostics ();
c_parser_consume_token (parser);
- parser->objc_could_be_foreach_context = true;
c_parser_declaration_or_fndef (parser, true, true, true, true,
true, &object_expression);
parser->objc_could_be_foreach_context = false;
init_expr:
{
tree init_expression;
- parser->objc_could_be_foreach_context = true;
init_expression = c_parser_expression (parser).value;
parser->objc_could_be_foreach_context = false;
if (c_parser_next_token_is_keyword (parser, RID_IN))
is_foreach_statement = true;
if (! lvalue_p (init_expression))
c_parser_error (parser, "invalid iterating variable in fast enumeration");
- object_expression = c_process_expr_stmt (loc, init_expression);
-
+ object_expression = c_fully_fold (init_expression, false, NULL);
}
else
{
}
/* Parse the loop condition. In the case of a foreach
statement, there is no loop condition. */
+ gcc_assert (!parser->objc_could_be_foreach_context);
if (!is_foreach_statement)
{
if (c_parser_next_token_is (parser, CPP_SEMICOLON))
else
{
if (is_foreach_statement)
- collection_expression = c_process_expr_stmt (loc, c_parser_expression (parser).value);
+ collection_expression = c_fully_fold (c_parser_expression (parser).value,
+ false, NULL);
else
incr = c_process_expr_stmt (loc, c_parser_expression (parser).value);
}
/* If the expression begins with a parenthesized type name, it may
be either a cast or a compound literal; we need to see whether
the next character is '{' to tell the difference. If not, it is
- an unary expression. */
+ an unary expression. Full detection of unknown typenames here
+ would require a 3-token lookahead. */
if (c_parser_next_token_is (parser, CPP_OPEN_PAREN)
&& c_token_starts_typename (c_parser_peek_2nd_token (parser)))
{
@protocol ( identifier )
@encode ( type-name )
objc-string-literal
+ Classname . identifier
*/
static struct c_expr
c_parser_consume_token (parser);
break;
case CPP_NAME:
- if (c_parser_peek_token (parser)->id_kind != C_ID_ID)
+ switch (c_parser_peek_token (parser)->id_kind)
{
+ case C_ID_ID:
+ {
+ tree id = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ expr.value = build_external_ref (loc, id,
+ (c_parser_peek_token (parser)->type
+ == CPP_OPEN_PAREN),
+ &expr.original_type);
+ break;
+ }
+ case C_ID_CLASSNAME:
+ {
+ /* Here we parse the Objective-C 2.0 Class.name dot
+ syntax. */
+ tree class_name = c_parser_peek_token (parser)->value;
+ tree component;
+ c_parser_consume_token (parser);
+ gcc_assert (c_dialect_objc ());
+ if (!c_parser_require (parser, CPP_DOT, "expected %<.%>"))
+ {
+ expr.value = error_mark_node;
+ break;
+ }
+ if (c_parser_next_token_is_not (parser, CPP_NAME))
+ {
+ c_parser_error (parser, "expected identifier");
+ expr.value = error_mark_node;
+ break;
+ }
+ component = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ expr.value = objc_build_class_component_ref (class_name,
+ component);
+ break;
+ }
+ default:
c_parser_error (parser, "expected expression");
expr.value = error_mark_node;
break;
}
- {
- tree id = c_parser_peek_token (parser)->value;
- c_parser_consume_token (parser);
- expr.value = build_external_ref (loc, id,
- (c_parser_peek_token (parser)->type
- == CPP_OPEN_PAREN),
- &expr.original_type);
- }
break;
case CPP_OPEN_PAREN:
/* A parenthesized expression, statement expression or compound
}
t1 = c_parser_type_name (parser);
if (t1 == NULL)
- {
- expr.value = error_mark_node;
- break;
- }
+ parser->error = true;
if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
+ gcc_assert (parser->error);
+ if (parser->error)
{
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
expr.value = error_mark_node;
break;
}
+
{
tree type = groktypename (t1, NULL, NULL);
tree offsetof_ref;
objc-class-instance-variables[opt]
@interface identifier ( identifier ) objc-protocol-refs[opt]
objc-methodprotolist @end
+ @interface identifier ( ) objc-protocol-refs[opt]
+ objc-methodprotolist @end
@implementation identifier ( identifier )
objc-superclass:
c_parser_consume_token (parser);
if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
{
+ /* We have a category or class extension. */
tree id2;
tree proto = NULL_TREE;
c_parser_consume_token (parser);
if (c_parser_next_token_is_not (parser, CPP_NAME))
{
- c_parser_error (parser, "expected identifier");
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
- return;
+ if (iface_p && c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
+ {
+ /* We have a class extension. */
+ id2 = NULL_TREE;
+ }
+ else
+ {
+ c_parser_error (parser, "expected identifier or %<)%>");
+ c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
+ return;
+ }
+ }
+ else
+ {
+ id2 = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
}
- id2 = c_parser_peek_token (parser)->value;
- c_parser_consume_token (parser);
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
if (!iface_p)
{
break;
}
c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
- objc_declare_protocols (list);
+ objc_declare_protocols (list, attributes);
}
else
{
if (c_parser_next_token_is_keyword (parser, RID_AT_END))
return;
else if (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY))
- c_parser_objc_at_property (parser);
+ c_parser_objc_at_property_declaration (parser);
else if (c_parser_next_token_is_keyword (parser, RID_AT_OPTIONAL))
{
objc_set_method_opt (true);
else
break;
}
- if (c_parser_next_token_starts_typename (parser))
+ if (c_parser_next_tokens_start_typename (parser, cla_prefer_type))
type_name = c_parser_type_name (parser);
if (type_name)
type = groktypename (type_name, NULL, NULL);
+
+ /* If the type is unknown, and error has already been produced and
+ we need to recover from the error. In that case, use NULL_TREE
+ for the type, as if no type had been specified; this will use the
+ default type ('id') which is good for error recovery. */
+ if (type == error_mark_node)
+ type = NULL_TREE;
+
return build_tree_list (quals, type);
}
return list;
}
-/* Parse an objc-try-catch-statement.
+/* Parse an objc-try-catch-finally-statement.
- objc-try-catch-statement:
+ objc-try-catch-finally-statement:
@try compound-statement objc-catch-list[opt]
@try compound-statement objc-catch-list[opt] @finally compound-statement
objc-catch-list:
- @catch ( parameter-declaration ) compound-statement
- objc-catch-list @catch ( parameter-declaration ) compound-statement
-*/
+ @catch ( objc-catch-parameter-declaration ) compound-statement
+ objc-catch-list @catch ( objc-catch-parameter-declaration ) compound-statement
+
+ objc-catch-parameter-declaration:
+ parameter-declaration
+ '...'
+
+ where '...' is to be interpreted literally, that is, it means CPP_ELLIPSIS.
+
+ PS: This function is identical to cp_parser_objc_try_catch_finally_statement
+ for C++. Keep them in sync. */
static void
-c_parser_objc_try_catch_statement (c_parser *parser)
+c_parser_objc_try_catch_finally_statement (c_parser *parser)
{
- location_t loc;
+ location_t location;
tree stmt;
+
gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_TRY));
c_parser_consume_token (parser);
- loc = c_parser_peek_token (parser)->location;
+ location = c_parser_peek_token (parser)->location;
+ objc_maybe_warn_exceptions (location);
stmt = c_parser_compound_statement (parser);
- objc_begin_try_stmt (loc, stmt);
+ objc_begin_try_stmt (location, stmt);
+
while (c_parser_next_token_is_keyword (parser, RID_AT_CATCH))
{
struct c_parm *parm;
+ tree parameter_declaration = error_mark_node;
+ bool seen_open_paren = false;
+
c_parser_consume_token (parser);
if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
- break;
- parm = c_parser_parameter_declaration (parser, NULL_TREE);
- if (parm == NULL)
+ seen_open_paren = true;
+ if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
{
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
- break;
+ /* We have "@catch (...)" (where the '...' are literally
+ what is in the code). Skip the '...'.
+ parameter_declaration is set to NULL_TREE, and
+ objc_being_catch_clauses() knows that that means
+ '...'. */
+ c_parser_consume_token (parser);
+ parameter_declaration = NULL_TREE;
}
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
- objc_begin_catch_clause (grokparm (parm));
+ else
+ {
+ /* We have "@catch (NSException *exception)" or something
+ like that. Parse the parameter declaration. */
+ parm = c_parser_parameter_declaration (parser, NULL_TREE);
+ if (parm == NULL)
+ parameter_declaration = error_mark_node;
+ else
+ parameter_declaration = grokparm (parm);
+ }
+ if (seen_open_paren)
+ c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>");
+ else
+ {
+ /* If there was no open parenthesis, we are recovering from
+ an error, and we are trying to figure out what mistake
+ the user has made. */
+
+ /* If there is an immediate closing parenthesis, the user
+ probably forgot the opening one (ie, they typed "@catch
+ NSException *e)". Parse the closing parenthesis and keep
+ going. */
+ if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
+ c_parser_consume_token (parser);
+
+ /* If these is no immediate closing parenthesis, the user
+ probably doesn't know that parenthesis are required at
+ all (ie, they typed "@catch NSException *e"). So, just
+ forget about the closing parenthesis and keep going. */
+ }
+ objc_begin_catch_clause (parameter_declaration);
if (c_parser_require (parser, CPP_OPEN_BRACE, "expected %<{%>"))
c_parser_compound_statement_nostart (parser);
objc_finish_catch_clause ();
}
if (c_parser_next_token_is_keyword (parser, RID_AT_FINALLY))
{
- location_t finloc;
- tree finstmt;
c_parser_consume_token (parser);
- finloc = c_parser_peek_token (parser)->location;
- finstmt = c_parser_compound_statement (parser);
- objc_build_finally_clause (finloc, finstmt);
+ location = c_parser_peek_token (parser)->location;
+ stmt = c_parser_compound_statement (parser);
+ objc_build_finally_clause (location, stmt);
}
objc_finish_try_stmt ();
}
gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_SYNCHRONIZED));
c_parser_consume_token (parser);
loc = c_parser_peek_token (parser)->location;
+ objc_maybe_warn_exceptions (loc);
if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
{
expr = c_parser_expression (parser).value;
c_parser_objc_diagnose_bad_element_prefix (c_parser *parser,
struct c_declspecs *specs)
{
- if (!specs->declspecs_seen_p || specs->type_seen_p || specs->non_sc_seen_p)
+ if (!specs->declspecs_seen_p || specs->non_sc_seen_p
+ || specs->typespec_kind != ctsk_none)
{
c_parser_error (parser,
"no type or storage class may be specified here,");
return false;
}
-/* ObjC @property. */
+/* Parse an Objective-C @property declaration. The syntax is:
-/* Parse a comma-separated list of property attributes. */
+ objc-property-declaration:
+ '@property' objc-property-attributes[opt] struct-declaration ;
+
+ objc-property-attributes:
+ '(' objc-property-attribute-list ')'
+
+ objc-property-attribute-list:
+ objc-property-attribute
+ objc-property-attribute-list, objc-property-attribute
+
+ objc-property-attribute
+ 'getter' = identifier
+ 'setter' = identifier
+ 'readonly'
+ 'readwrite'
+ 'assign'
+ 'retain'
+ 'copy'
+ 'nonatomic'
+
+ For example:
+ @property NSString *name;
+ @property (readonly) id object;
+ @property (retain, nonatomic, getter=getTheName) id name;
+ @property int a, b, c;
+ PS: This function is identical to cp_parser_objc_at_propery_declaration
+ for C++. Keep them in sync. */
static void
-c_parser_objc_property_attrlist (c_parser *parser)
-{
- bool err = false;
- /* Initialize to an empty list. */
- objc_set_property_attr (c_parser_peek_token (parser)->location,
- OBJC_PATTR_INIT, NULL_TREE);
+c_parser_objc_at_property_declaration (c_parser *parser)
+{
+ /* The following variables hold the attributes of the properties as
+ parsed. They are 'false' or 'NULL_TREE' if the attribute was not
+ seen. When we see an attribute, we set them to 'true' (if they
+ are boolean properties) or to the identifier (if they have an
+ argument, ie, for getter and setter). Note that here we only
+ parse the list of attributes, check the syntax and accumulate the
+ attributes that we find. objc_add_property_declaration() will
+ then process the information. */
+ bool property_assign = false;
+ bool property_copy = false;
+ tree property_getter_ident = NULL_TREE;
+ bool property_nonatomic = false;
+ bool property_readonly = false;
+ bool property_readwrite = false;
+ bool property_retain = false;
+ tree property_setter_ident = NULL_TREE;
+
+ /* 'properties' is the list of properties that we read. Usually a
+ single one, but maybe more (eg, in "@property int a, b, c;" there
+ are three). */
+ tree properties;
+ location_t loc;
- if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
- return;
+ loc = c_parser_peek_token (parser)->location;
+ gcc_assert (c_parser_next_token_is_keyword (parser, RID_AT_PROPERTY));
- /* Eat the '(' */
- c_parser_consume_token (parser);
-
- /* Property attribute keywords are valid now. */
- parser->objc_property_attr_context = true;
- while (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN)
- && c_parser_next_token_is_not (parser, CPP_EOF)
- && !err)
+ c_parser_consume_token (parser); /* Eat '@property'. */
+
+ /* Parse the optional attribute list... */
+ if (c_parser_next_token_is (parser, CPP_OPEN_PAREN))
{
- enum rid keywd;
- location_t loc;
- if (c_parser_peek_token (parser)->type != CPP_KEYWORD)
+ /* Eat the '(' */
+ c_parser_consume_token (parser);
+
+ /* Property attribute keywords are valid now. */
+ parser->objc_property_attr_context = true;
+
+ while (true)
{
- c_parser_error (parser, "expected a property attribute");
+ bool syntax_error = false;
+ c_token *token = c_parser_peek_token (parser);
+ enum rid keyword;
+
+ if (token->type != CPP_KEYWORD)
+ {
+ if (token->type == CPP_CLOSE_PAREN)
+ c_parser_error (parser, "expected identifier");
+ else
+ {
+ c_parser_consume_token (parser);
+ c_parser_error (parser, "unknown property attribute");
+ }
+ break;
+ }
+ keyword = token->keyword;
c_parser_consume_token (parser);
- err = true;
- break;
- }
- keywd = c_parser_peek_token (parser)->keyword;
- /* Initially, make diagnostics point to the attribute. */
- loc = c_parser_peek_token (parser)->location;
- switch (keywd)
- {
- tree ident;
- objc_property_attribute_kind pkind;
- case RID_READONLY:
- objc_set_property_attr (loc, OBJC_PATTR_READONLY, NULL_TREE);
- break;
- case RID_GETTER:
- case RID_SETTER:
- case RID_IVAR:
- c_parser_consume_token (parser);
- if (c_parser_next_token_is_not (parser, CPP_EQ))
- {
- c_parser_error (parser,
- "getter/setter/ivar attribute must be followed by %<=%>");
- err = true;
- break;
- }
- c_parser_consume_token (parser); /* eat the = */
- if (c_parser_next_token_is_not (parser, CPP_NAME))
- {
- c_parser_error (parser, "expected an identifier");
- err = true;
- break;
- }
- ident = c_parser_peek_token (parser)->value;
- if (keywd == RID_SETTER)
- {
- pkind = OBJC_PATTR_SETTER;
- /* Eat the identifier, and look for the following : */
- c_parser_consume_token (parser);
- if (c_parser_next_token_is_not (parser, CPP_COLON))
- {
+ switch (keyword)
+ {
+ case RID_ASSIGN: property_assign = true; break;
+ case RID_COPY: property_copy = true; break;
+ case RID_NONATOMIC: property_nonatomic = true; break;
+ case RID_READONLY: property_readonly = true; break;
+ case RID_READWRITE: property_readwrite = true; break;
+ case RID_RETAIN: property_retain = true; break;
+
+ case RID_GETTER:
+ case RID_SETTER:
+ if (c_parser_next_token_is_not (parser, CPP_EQ))
+ {
+ if (keyword == RID_GETTER)
c_parser_error (parser,
- "setter name must be followed by %<:%>");
- err = true;
- }
- }
- else if (keywd == RID_GETTER)
- pkind = OBJC_PATTR_GETTER;
- else
- pkind = OBJC_PATTR_IVAR;
-
- objc_set_property_attr (loc, pkind, ident);
- break;
- case RID_COPIES:
- objc_set_property_attr (loc, OBJC_PATTR_COPIES, NULL_TREE);
+ "missing %<=%> (after %<getter%> attribute)");
+ else
+ c_parser_error (parser,
+ "missing %<=%> (after %<setter%> attribute)");
+ syntax_error = true;
+ break;
+ }
+ c_parser_consume_token (parser); /* eat the = */
+ if (c_parser_next_token_is_not (parser, CPP_NAME))
+ {
+ c_parser_error (parser, "expected identifier");
+ syntax_error = true;
+ break;
+ }
+ if (keyword == RID_SETTER)
+ {
+ if (property_setter_ident != NULL_TREE)
+ c_parser_error (parser, "the %<setter%> attribute may only be specified once");
+ else
+ property_setter_ident = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ if (c_parser_next_token_is_not (parser, CPP_COLON))
+ c_parser_error (parser, "setter name must terminate with %<:%>");
+ else
+ c_parser_consume_token (parser);
+ }
+ else
+ {
+ if (property_getter_ident != NULL_TREE)
+ c_parser_error (parser, "the %<getter%> attribute may only be specified once");
+ else
+ property_getter_ident = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ }
+ break;
+ default:
+ c_parser_error (parser, "unknown property attribute");
+ syntax_error = true;
+ break;
+ }
+
+ if (syntax_error)
break;
- default:
- c_parser_error (parser, "unknown property attribute");
- err = true;
+
+ if (c_parser_next_token_is (parser, CPP_COMMA))
+ c_parser_consume_token (parser);
+ else
break;
}
- /* Eat the attribute,identifier or colon that's been used. */
- c_parser_consume_token (parser);
- if (err)
- break;
-
- if (c_parser_next_token_is (parser, CPP_COMMA))
- c_parser_consume_token (parser);
- else if (c_parser_next_token_is_not (parser, CPP_CLOSE_PAREN))
- warning_at (c_parser_peek_token (parser)->location, 0,
- "property attributes should be separated by a %<,%>");
- }
- parser->objc_property_attr_context = false;
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
-}
-
-/* Parse property attributes and then the definition. */
-
-static void
-c_parser_objc_at_property (c_parser *parser)
-{
- tree props;
- /* We should only arrive here with the property keyword. */
- c_parser_require_keyword (parser, RID_AT_PROPERTY, "expected %<@property%>");
-
- /* Process the optional attribute list... */
- c_parser_objc_property_attrlist (parser) ;
- /* ... and the property var decls. */
- props = c_parser_struct_declaration (parser);
+ parser->objc_property_attr_context = false;
+ c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
+ }
+ /* ... and the property declaration(s). */
+ properties = c_parser_struct_declaration (parser);
- /* Comma-separated properties are chained together in
- reverse order; add them one by one. */
- props = nreverse (props);
+ if (properties == error_mark_node)
+ {
+ c_parser_skip_until_found (parser, CPP_SEMICOLON, NULL);
+ parser->error = false;
+ return;
+ }
- for (; props; props = TREE_CHAIN (props))
- objc_add_property_variable (copy_node (props));
+ if (properties == NULL_TREE)
+ c_parser_error (parser, "expected identifier");
+ else
+ {
+ /* Comma-separated properties are chained together in
+ reverse order; add them one by one. */
+ properties = nreverse (properties);
+
+ for (; properties; properties = TREE_CHAIN (properties))
+ objc_add_property_declaration (loc, copy_node (properties),
+ property_readonly, property_readwrite,
+ property_assign, property_retain,
+ property_copy, property_nonatomic,
+ property_getter_ident, property_setter_ident);
+ }
c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
+ parser->error = false;
}
/* Parse an Objective-C @synthesize declaration. The syntax is:
goto saw_error;
}
+ /* Arrange to pass the location of the assignment operator to
+ c_finish_omp_atomic. */
+ loc = c_parser_peek_token (parser)->location;
c_parser_consume_token (parser);
{
location_t rhs_loc = c_parser_peek_token (parser)->location;
goto pop_scopes;
/* Parse the initialization declaration or expression. */
- if (c_parser_next_token_starts_declaration (parser))
+ if (c_parser_next_tokens_start_declaration (parser))
{
if (i > 0)
VEC_safe_push (tree, gc, for_block, c_begin_compound_stmt (true));
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