/* YACC parser for C syntax and for Objective C. -*-c-*-
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+ 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GCC.
written by AT&T, but I have never seen it. */
ifobjc
-%expect 31 /* shift/reduce conflicts, and 1 reduce/reduce conflict. */
+%expect 32 /* shift/reduce conflicts, and 1 reduce/reduce conflict. */
end ifobjc
ifc
%expect 10 /* shift/reduce conflicts, and no reduce/reduce conflicts. */
#include "cpplib.h"
#include "intl.h"
#include "timevar.h"
-#include "c-lex.h" /* Gets YYDEBUG macro. */
+#include "c-pragma.h" /* For YYDEBUG definition, and parse_in. */
#include "c-tree.h"
-#include "c-pragma.h"
#include "flags.h"
#include "output.h"
#include "toplev.h"
#include "ggc.h"
-
+
#ifdef MULTIBYTE_CHARS
#include <locale.h>
#endif
end ifobjc
\f
%{
-/* Number of statements (loosely speaking) and compound statements
+/* Number of statements (loosely speaking) and compound statements
seen so far. */
static int stmt_count;
static int compstmt_count;
-
+
/* Input file and line number of the end of the body of last simple_if;
used by the stmt-rule immediately after simple_if returns. */
static const char *if_stmt_file;
static int if_stmt_line;
/* List of types and structure classes of the current declaration. */
-static tree current_declspecs = NULL_TREE;
-static tree prefix_attributes = NULL_TREE;
+static GTY(()) tree current_declspecs;
+static GTY(()) tree prefix_attributes;
/* List of all the attributes applying to the identifier currently being
declared; includes prefix_attributes and possibly some more attributes
just after a comma. */
-static tree all_prefix_attributes = NULL_TREE;
+static GTY(()) tree all_prefix_attributes;
/* Stack of saved values of current_declspecs, prefix_attributes and
all_prefix_attributes. */
-static tree declspec_stack;
+static GTY(()) tree declspec_stack;
/* PUSH_DECLSPEC_STACK is called from setspecs; POP_DECLSPEC_STACK
should be called from the productions making use of setspecs. */
/* For __extension__, save/restore the warning flags which are
controlled by __extension__. */
-#define SAVE_WARN_FLAGS() \
+#define SAVE_EXT_FLAGS() \
size_int (pedantic \
| (warn_pointer_arith << 1) \
- | (warn_traditional << 2))
+ | (warn_traditional << 2) \
+ | (flag_iso << 3))
-#define RESTORE_WARN_FLAGS(tval) \
+#define RESTORE_EXT_FLAGS(tval) \
do { \
int val = tree_low_cst (tval, 0); \
pedantic = val & 1; \
warn_pointer_arith = (val >> 1) & 1; \
warn_traditional = (val >> 2) & 1; \
+ flag_iso = (val >> 3) & 1; \
} while (0)
ifobjc
static int objc_pq_context = 0, objc_public_flag = 0;
/* The following flag is needed to contextualize ObjC lexical analysis.
- In some cases (e.g., 'int NSObject;'), it is undesirable to bind
- an identifier to an ObjC class, even if a class with that name
+ In some cases (e.g., 'int NSObject;'), it is undesirable to bind
+ an identifier to an ObjC class, even if a class with that name
exists. */
static int objc_need_raw_identifier;
#define OBJC_NEED_RAW_IDENTIFIER(VAL) objc_need_raw_identifier = VAL
#define OBJC_NEED_RAW_IDENTIFIER(VAL) /* nothing */
end ifc
+static bool parsing_iso_function_signature;
+
/* Tell yyparse how to print a token's value, if yydebug is set. */
#define YYPRINT(FILE,YYCHAR,YYLVAL) yyprint(FILE,YYCHAR,YYLVAL)
static int yylex PARAMS ((void));
static void init_reswords PARAMS ((void));
-/* Add GC roots for variables local to this file. */
+ /* Initialisation routine for this file. */
void
c_parse_init ()
{
init_reswords ();
-
- ggc_add_tree_root (&declspec_stack, 1);
- ggc_add_tree_root (¤t_declspecs, 1);
- ggc_add_tree_root (&prefix_attributes, 1);
- ggc_add_tree_root (&all_prefix_attributes, 1);
}
%}
;
extdef:
+ extdef_1
+ { parsing_iso_function_signature = false; } /* Reset after any external definition. */
+ ;
+
+extdef_1:
fndef
| datadef
ifobjc
else
error ("argument of `asm' is not a constant string"); }
| extension extdef
- { RESTORE_WARN_FLAGS ($1); }
+ { RESTORE_EXT_FLAGS ($1); }
;
datadef:
{ if (pedantic)
error ("ISO C forbids data definition with no type or storage class");
else
- warning ("data definition has no type or storage class");
+ warning ("data definition has no type or storage class");
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_initdecls ';'
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $7;
DECL_SOURCE_LINE (current_function_decl) = $8;
- finish_function (0, 1);
+ finish_function (0, 1);
POP_DECLSPEC_STACK; }
| declspecs_ts setspecs declarator error
{ POP_DECLSPEC_STACK; }
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $7;
DECL_SOURCE_LINE (current_function_decl) = $8;
- finish_function (0, 1);
+ finish_function (0, 1);
POP_DECLSPEC_STACK; }
| declspecs_nots setspecs notype_declarator error
{ POP_DECLSPEC_STACK; }
save_filename save_lineno compstmt_or_error
{ DECL_SOURCE_FILE (current_function_decl) = $6;
DECL_SOURCE_LINE (current_function_decl) = $7;
- finish_function (0, 1);
+ finish_function (0, 1);
POP_DECLSPEC_STACK; }
| setspecs notype_declarator error
{ POP_DECLSPEC_STACK; }
/* __extension__ turns off -pedantic for following primary. */
| extension cast_expr %prec UNARY
{ $$ = $2;
- RESTORE_WARN_FLAGS ($1); }
+ RESTORE_EXT_FLAGS ($1); }
| unop cast_expr %prec UNARY
{ $$ = build_unary_op ($1, $2, 0);
overflow_warning ($$); }
/* Refer to the address of a label as a pointer. */
| ANDAND identifier
{ $$ = finish_label_address_expr ($2); }
-/* This seems to be impossible on some machines, so let's turn it off.
- You can use __builtin_next_arg to find the anonymous stack args.
- | '&' ELLIPSIS
- { tree types = TYPE_ARG_TYPES (TREE_TYPE (current_function_decl));
- $$ = error_mark_node;
- if (TREE_VALUE (tree_last (types)) == void_type_node)
- error ("`&...' used in function with fixed number of arguments");
- else
- {
- if (pedantic)
- pedwarn ("ISO C forbids `&...'");
- $$ = tree_last (DECL_ARGUMENTS (current_function_decl));
- $$ = build_unary_op (ADDR_EXPR, $$, 0);
- } }
-*/
| sizeof unary_expr %prec UNARY
{ skip_evaluation--;
if (TREE_CODE ($2) == COMPONENT_REF
ALIGNOF { skip_evaluation++; }
;
+typeof:
+ TYPEOF { skip_evaluation++; }
+ ;
+
cast_expr:
unary_expr
| '(' typename ')' cast_expr %prec UNARY
{ $$ = fix_string_type ($$); }
| VAR_FUNC_NAME
{ $$ = fname_decl (C_RID_CODE ($$), $$); }
- | '(' typename ')' '{'
+ | '(' typename ')' '{'
{ start_init (NULL_TREE, NULL, 0);
$2 = groktypename ($2);
really_start_incremental_init ($2); }
end ifobjc
old_style_parm_decls:
+ old_style_parm_decls_1
+ {
+ parsing_iso_function_signature = false; /* Reset after decls. */
+ }
+ ;
+
+old_style_parm_decls_1:
/* empty */
+ {
+ if (warn_traditional && !in_system_header
+ && parsing_iso_function_signature)
+ warning ("traditional C rejects ISO C style function definitions");
+ parsing_iso_function_signature = false; /* Reset after warning. */
+ }
| datadecls
- | datadecls ELLIPSIS
- /* ... is used here to indicate a varargs function. */
- { c_mark_varargs ();
- if (pedantic)
- pedwarn ("ISO C does not permit use of `varargs.h'"); }
;
/* The following are analogous to lineno_decl, decls and decl
| declspecs ';'
{ shadow_tag ($1); }
| extension decl
- { RESTORE_WARN_FLAGS ($1); }
+ { RESTORE_EXT_FLAGS ($1); }
;
/* A list of declaration specifiers. These are:
| non_empty_protocolrefs
{ $$ = get_object_reference ($1); }
end ifobjc
- | TYPEOF '(' expr ')'
- { $$ = TREE_TYPE ($3); }
- | TYPEOF '(' typename ')'
- { $$ = groktypename ($3); }
+ | typeof '(' expr ')'
+ { skip_evaluation--; $$ = TREE_TYPE ($3); }
+ | typeof '(' typename ')'
+ { skip_evaluation--; $$ = groktypename ($3); }
;
/* typespec_nonreserved_attr does not exist. */
| declarator maybeasm maybe_attribute
{ tree d = start_decl ($1, current_declspecs, 0,
chainon ($3, all_prefix_attributes));
- finish_decl (d, NULL_TREE, $2);
+ finish_decl (d, NULL_TREE, $2);
}
;
| attributes
{ $$ = $1; }
;
-
+
attributes:
attribute
{ $$ = $1; }
| attribute_list ',' attrib
{ $$ = chainon ($1, $3); }
;
-
+
attrib:
/* empty */
{ $$ = NULL_TREE; }
if (pedantic)
pedwarn ("obsolete use of designated initializer with `:'"); }
initval
+ {}
| initval
;
designator:
'.' identifier
{ set_init_label ($2); }
- /* These are for labeled elements. The syntax for an array element
- initializer conflicts with the syntax for an Objective-C message,
- so don't include these productions in the Objective-C grammar. */
-ifc
| '[' expr_no_commas ELLIPSIS expr_no_commas ']'
{ set_init_index ($2, $4);
if (pedantic)
pedwarn ("ISO C forbids specifying range of elements to initialize"); }
| '[' expr_no_commas ']'
{ set_init_index ($2, NULL_TREE); }
-end ifc
;
\f
nested_function:
pop_function_context ();
YYERROR1;
}
+ parsing_iso_function_signature = false; /* Don't warn about nested functions. */
}
old_style_parm_decls
{ store_parm_decls (); }
DECL_SOURCE_FILE (decl) = $5;
DECL_SOURCE_LINE (decl) = $6;
finish_function (1, 1);
- pop_function_context ();
+ pop_function_context ();
add_decl_stmt (decl); }
;
pop_function_context ();
YYERROR1;
}
+ parsing_iso_function_signature = false; /* Don't warn about nested functions. */
}
old_style_parm_decls
{ store_parm_decls (); }
DECL_SOURCE_FILE (decl) = $5;
DECL_SOURCE_LINE (decl) = $6;
finish_function (1, 1);
- pop_function_context ();
+ pop_function_context ();
add_decl_stmt (decl); }
;
{ $$ = start_struct (RECORD_TYPE, $2);
/* Start scope of tag before parsing components. */
}
- component_decl_list '}' maybe_attribute
+ component_decl_list '}' maybe_attribute
{ $$ = finish_struct ($<ttype>4, $5, chainon ($1, $7)); }
| struct_head '{' component_decl_list '}' maybe_attribute
{ $$ = finish_struct (start_struct (RECORD_TYPE, NULL_TREE),
POP_DECLSPEC_STACK; }
| declspecs_nosc_ts setspecs save_filename save_lineno
{
- /* Support for unnamed structs or unions as members of
- structs or unions (which is [a] useful and [b] supports
+ /* Support for unnamed structs or unions as members of
+ structs or unions (which is [a] useful and [b] supports
MS P-SDK). */
if (pedantic)
pedwarn ("ISO C doesn't support unnamed structs/unions");
{ $$ = NULL_TREE; }
| extension component_decl
{ $$ = $2;
- RESTORE_WARN_FLAGS ($1); }
+ RESTORE_EXT_FLAGS ($1); }
;
components:
{ if (flag_isoc99)
{
tree scope_stmt = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
- $$ = poplevel (kept_level_p (), 0, 0);
- SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
+ $$ = poplevel (kept_level_p (), 0, 0);
+ SCOPE_STMT_BLOCK (TREE_PURPOSE (scope_stmt))
= SCOPE_STMT_BLOCK (TREE_VALUE (scope_stmt))
= $$;
}
compstmt_nostart: '}'
{ $$ = convert (void_type_node, integer_zero_node); }
| pushlevel maybe_label_decls compstmt_contents_nonempty '}' poplevel
- { $$ = poplevel (kept_level_p (), 1, 0);
- SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
+ { $$ = poplevel (kept_level_p (), 1, 0);
+ SCOPE_STMT_BLOCK (TREE_PURPOSE ($5))
= SCOPE_STMT_BLOCK (TREE_VALUE ($5))
= $$; }
;
;
compstmt: compstmt_start compstmt_nostart
- { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
+ { RECHAIN_STMTS ($1, COMPOUND_BODY ($1));
last_expr_type = NULL_TREE;
$$ = $1; }
;
IF
{ $<ttype>$ = c_begin_if_stmt (); }
'(' expr ')'
- { c_expand_start_cond (c_common_truthvalue_conversion ($4),
+ { c_expand_start_cond (c_common_truthvalue_conversion ($4),
compstmt_count,$<ttype>2);
$<itype>$ = stmt_count;
if_stmt_file = $<filename>-2;
DO
{ stmt_count++;
compstmt_count++;
- $<ttype>$
+ $<ttype>$
= add_stmt (build_stmt (DO_STMT, NULL_TREE,
NULL_TREE));
/* In the event that a parse error prevents
we later pass to c_finish_while_stmt_cond to fill
in the condition and other tidbits. */
| WHILE
- { stmt_count++;
+ { stmt_count++;
$<ttype>$ = c_begin_while_stmt (); }
'(' expr ')'
{ $4 = c_common_truthvalue_conversion ($4);
| FOR
{ $<ttype>$ = build_stmt (FOR_STMT, NULL_TREE, NULL_TREE,
NULL_TREE, NULL_TREE);
- add_stmt ($<ttype>$); }
+ add_stmt ($<ttype>$); }
'(' for_init_stmt
{ stmt_count++;
RECHAIN_STMTS ($<ttype>2, FOR_INIT_STMT ($<ttype>2)); }
xexpr ';'
- { if ($6)
+ { if ($6)
FOR_COND ($<ttype>2)
= c_common_truthvalue_conversion ($6); }
xexpr ')'
for_init_stmt:
xexpr ';'
- { add_stmt (build_stmt (EXPR_STMT, $1)); }
+ { add_stmt (build_stmt (EXPR_STMT, $1)); }
| decl
{ check_for_loop_decls (); }
;
error ("ISO C requires a named argument before `...'");
}
| parms
- { $$ = get_parm_info (1); }
+ { $$ = get_parm_info (1);
+ parsing_iso_function_signature = true;
+ }
| parms ',' ELLIPSIS
{ $$ = get_parm_info (0); }
;
| declspecs_ts setspecs notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
- chainon ($4, all_prefix_attributes));
+ chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts setspecs absdcl_maybe_attribute
{ $$ = $3;
| declspecs_ts_nosa setspecs_fp notype_declarator maybe_attribute
{ $$ = build_tree_list (build_tree_list (current_declspecs,
$3),
- chainon ($4, all_prefix_attributes));
+ chainon ($4, all_prefix_attributes));
POP_DECLSPEC_STACK; }
| declspecs_ts_nosa setspecs_fp absdcl_maybe_attribute
{ $$ = $3;
extension:
EXTENSION
- { $$ = SAVE_WARN_FLAGS();
+ { $$ = SAVE_EXT_FLAGS();
pedantic = 0;
warn_pointer_arith = 0;
- warn_traditional = 0; }
+ warn_traditional = 0;
+ flag_iso = 0; }
;
\f
ifobjc
{
objc_declare_class ($2);
}
+ ;
aliasdecl:
ALIAS identifier identifier ';'
{
objc_declare_alias ($2, $3);
}
+ ;
classdef:
INTERFACE identifier protocolrefs '{'
;
objcmessageexpr:
- '['
- { objc_receiver_context = 1; }
- receiver
- { objc_receiver_context = 0; }
- messageargs ']'
- {
- $$ = build_tree_list ($3, $5);
- }
+ '[' receiver messageargs ']'
+ { $$ = build_tree_list ($2, $3); }
;
selectorarg:
{ "__restrict__", RID_RESTRICT, 0 },
{ "__signed", RID_SIGNED, 0 },
{ "__signed__", RID_SIGNED, 0 },
+ { "__thread", RID_THREAD, 0 },
{ "__typeof", RID_TYPEOF, 0 },
{ "__typeof__", RID_TYPEOF, 0 },
{ "__unbounded", RID_UNBOUNDED, 0 },
/* RID_BOUNDED */ TYPE_QUAL,
/* RID_UNBOUNDED */ TYPE_QUAL,
/* RID_COMPLEX */ TYPESPEC,
+ /* RID_THREAD */ SCSPEC,
/* C++ */
/* RID_FRIEND */ 0,
/* RID_BYCOPY */ TYPE_QUAL,
/* RID_BYREF */ TYPE_QUAL,
/* RID_ONEWAY */ TYPE_QUAL,
-
+
/* C */
/* RID_INT */ TYPESPEC,
/* RID_CHAR */ TYPESPEC,
/* RID_REINTCAST */ 0,
/* RID_STATCAST */ 0,
- /* alternate spellings */
- /* RID_AND */ 0,
- /* RID_AND_EQ */ 0,
- /* RID_NOT */ 0,
- /* RID_NOT_EQ */ 0,
- /* RID_OR */ 0,
- /* RID_OR_EQ */ 0,
- /* RID_XOR */ 0,
- /* RID_XOR_EQ */ 0,
- /* RID_BITAND */ 0,
- /* RID_BITOR */ 0,
- /* RID_COMPL */ 0,
-
/* Objective C */
/* RID_ID */ OBJECTNAME,
/* RID_AT_ENCODE */ ENCODE,
int mask = (flag_isoc99 ? 0 : D_C89)
| (flag_no_asm ? (flag_isoc99 ? D_EXT : D_EXT|D_EXT89) : 0);
- if (c_language != clk_objective_c)
+ if (!flag_objc)
mask |= D_OBJC;
/* It is not necessary to register ridpointers as a GC root, because
yylexname ()
{
tree decl;
-
+
ifobjc
int objc_force_identifier = objc_need_raw_identifier;
OBJC_NEED_RAW_IDENTIFIER (0);
end ifobjc
-
+
if (C_IS_RESERVED_WORD (yylval.ttype))
{
enum rid rid_code = C_RID_CODE (yylval.ttype);
/* __FUNCTION__ and __PRETTY_FUNCTION__ get converted
to string constants. */
const char *name = fname_string (rid_code);
-
+
yylval.ttype = build_string (strlen (name) + 1, name);
C_ARTIFICIAL_STRING_P (yylval.ttype) = 1;
last_token = CPP_STRING; /* so yyerror won't choke */
return STRING;
}
-
+
/* Return the canonical spelling for this keyword. */
yylval.ttype = ridpointers[(int) rid_code];
return yycode;
tree objc_interface_decl = is_class_name (yylval.ttype);
/* ObjC class names are in the same namespace as variables and
typedefs, and hence are shadowed by local declarations. */
- if (objc_interface_decl
- && (global_bindings_p ()
+ if (objc_interface_decl
+ && (global_bindings_p ()
|| (!objc_force_identifier && !decl)))
{
yylval.ttype = objc_interface_decl;
|| (next_type == CPP_NAME && yylexname () == STRING));
yylval.ttype = combine_strings (strings);
-
- VARRAY_FREE (strings);
}
else
yylval.ttype = orig;
case CPP_STRING:
case CPP_WSTRING:
return yylexstring ();
-
+
/* This token is Objective-C specific. It gives the next token
special significance. */
case CPP_ATSIGN:
tree t = yyl.ttype;
fprintf (file, " [%s]", NAME(last_token));
-
+
switch (yychar)
{
case IDENTIFIER:
/* This is not the ideal place to put these, but we have to get them out
of c-lex.c because cp/lex.c has its own versions. */
-/* Return something to represent absolute declarators containing a *.
- TARGET is the absolute declarator that the * contains.
- TYPE_QUALS_ATTRS is a list of modifiers such as const or volatile
- to apply to the pointer type, represented as identifiers, possible mixed
- with attributes.
-
- We return an INDIRECT_REF whose "contents" are TARGET (inside a TREE_LIST,
- if attributes are present) and whose type is the modifier list. */
-
-tree
-make_pointer_declarator (type_quals_attrs, target)
- tree type_quals_attrs, target;
-{
- tree quals, attrs;
- tree itarget = target;
- split_specs_attrs (type_quals_attrs, &quals, &attrs);
- if (attrs != NULL_TREE)
- itarget = tree_cons (attrs, target, NULL_TREE);
- return build1 (INDIRECT_REF, quals, itarget);
-}
-
/* Free malloced parser stacks if necessary. */
void
free (malloced_yyvs);
}
}
+
+#include "gt-c-parse.h"
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