/* YACC parser for C expressions, for GDB.
- Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2003, 2004, 2006, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Parse a C expression from text in a string,
and return the result as a struct expression pointer.
%{
#include "defs.h"
+#include "gdb_string.h"
+#include <ctype.h>
#include "expression.h"
-#include "parser-defs.h"
#include "value.h"
+#include "parser-defs.h"
#include "language.h"
#include "c-lang.h"
+#include "bfd.h" /* Required by objfiles.h. */
+#include "symfile.h" /* Required by objfiles.h. */
+#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
+#include "charset.h"
+#include "block.h"
+#include "cp-support.h"
+#include "dfp.h"
+#include "gdb_assert.h"
+#include "macroscope.h"
+
+#define parse_type builtin_type (parse_gdbarch)
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
+ as well as gratuitiously global symbol names, so we can have multiple
+ yacc generated parsers in gdb. Note that these are only the variables
+ produced by yacc. If other parser generators (bison, byacc, etc) produce
+ additional global names that conflict at link time, then those parser
+ generators need to be fixed instead of adding those names to this list. */
-/* These MUST be included in any grammar file!!!! Please choose unique names!
- Note that this are a combined list of variables that can be produced
- by any one of bison, byacc, or yacc. */
#define yymaxdepth c_maxdepth
-#define yyparse c_parse
+#define yyparse c_parse_internal
#define yylex c_lex
#define yyerror c_error
#define yylval c_lval
#define yy_yyv c_yyv
#define yyval c_val
#define yylloc c_lloc
-#define yyss c_yyss /* byacc */
-#define yyssp c_yysp /* byacc */
-#define yyvs c_yyvs /* byacc */
-#define yyvsp c_yyvsp /* byacc */
+#define yyreds c_reds /* With YYDEBUG defined */
+#define yytoks c_toks /* With YYDEBUG defined */
+#define yyname c_name /* With YYDEBUG defined */
+#define yyrule c_rule /* With YYDEBUG defined */
+#define yylhs c_yylhs
+#define yylen c_yylen
+#define yydefred c_yydefred
+#define yydgoto c_yydgoto
+#define yysindex c_yysindex
+#define yyrindex c_yyrindex
+#define yygindex c_yygindex
+#define yytable c_yytable
+#define yycheck c_yycheck
-int
-yyparse PARAMS ((void));
+#ifndef YYDEBUG
+#define YYDEBUG 1 /* Default to yydebug support */
+#endif
-int
-yylex PARAMS ((void));
+#define YYFPRINTF parser_fprintf
-void
-yyerror PARAMS ((char *));
+int yyparse (void);
+
+static int yylex (void);
-/* #define YYDEBUG 1 */
+void yyerror (char *);
%}
%union
{
LONGEST lval;
- unsigned LONGEST ulval;
struct {
LONGEST val;
struct type *type;
- } typed_val;
- double dval;
+ } typed_val_int;
+ struct {
+ DOUBLEST dval;
+ struct type *type;
+ } typed_val_float;
+ struct {
+ gdb_byte val[16];
+ struct type *type;
+ } typed_val_decfloat;
struct symbol *sym;
struct type *tval;
struct stoken sval;
+ struct typed_stoken tsval;
struct ttype tsym;
struct symtoken ssym;
int voidval;
enum exp_opcode opcode;
struct internalvar *ivar;
+ struct stoken_vector svec;
struct type **tvec;
int *ivec;
}
%{
/* YYSTYPE gets defined by %union */
-static int
-parse_number PARAMS ((char *, int, int, YYSTYPE *));
+static int parse_number (char *, int, int, YYSTYPE *);
+static struct stoken operator_stoken (const char *);
%}
-%type <voidval> exp exp1 type_exp start variable qualified_name
+%type <voidval> exp exp1 type_exp start variable qualified_name lcurly
+%type <lval> rcurly
%type <tval> type typebase
%type <tvec> nonempty_typelist
/* %type <bval> block */
%type <tval> ptype
%type <lval> array_mod
-%token <typed_val> INT
-%token <dval> FLOAT
+%token <typed_val_int> INT
+%token <typed_val_float> FLOAT
+%token <typed_val_decfloat> DECFLOAT
/* Both NAME and TYPENAME tokens represent symbols in the input,
and both convey their data as strings.
Contexts where this distinction is not important can use the
nonterminal "name", which matches either NAME or TYPENAME. */
-%token <sval> STRING
+%token <tsval> STRING
+%token <tsval> CHAR
%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
+%token <voidval> COMPLETE
%token <tsym> TYPENAME
%type <sval> name
+%type <svec> string_exp
%type <ssym> name_not_typename
%type <tsym> typename
%token <ssym> NAME_OR_INT
+%token OPERATOR
%token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
%token TEMPLATE
%token ERROR
+%token NEW DELETE
+%type <sval> operator
+%token REINTERPRET_CAST DYNAMIC_CAST STATIC_CAST CONST_CAST
/* Special type cases, put in to allow the parser to distinguish different
legal basetypes. */
-%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD
-%token <lval> LAST REGNAME
+%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
-%token <ivar> VARIABLE
+%token <sval> VARIABLE
%token <opcode> ASSIGN_MODIFY
/* C++ */
-%token THIS
+%token TRUEKEYWORD
+%token FALSEKEYWORD
+
%left ','
%left ABOVE_COMMA
%left '+' '-'
%left '*' '/' '%'
%right UNARY INCREMENT DECREMENT
-%right ARROW '.' '[' '('
+%right ARROW ARROW_STAR '.' DOT_STAR '[' '('
%token <ssym> BLOCKNAME
+%token <bval> FILENAME
%type <bval> block
%left COLONCOLON
/* Expressions, not including the comma operator. */
exp : '*' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_IND); }
+ ;
exp : '&' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_ADDR); }
+ ;
exp : '-' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_NEG); }
;
+exp : '+' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_PLUS); }
+ ;
+
exp : '!' exp %prec UNARY
{ write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
;
write_exp_elt_opcode (STRUCTOP_PTR); }
;
+exp : exp ARROW name COMPLETE
+ { mark_struct_expression ();
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_PTR); }
+ ;
+
+exp : exp ARROW COMPLETE
+ { struct stoken s;
+ mark_struct_expression ();
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ s.ptr = "";
+ s.length = 0;
+ write_exp_string (s);
+ write_exp_elt_opcode (STRUCTOP_PTR); }
+ ;
+
exp : exp ARROW qualified_name
{ /* exp->type::name becomes exp->*(&type::name) */
/* Note: this doesn't work if name is a
write_exp_elt_opcode (UNOP_ADDR);
write_exp_elt_opcode (STRUCTOP_MPTR); }
;
-exp : exp ARROW '*' exp
+
+exp : exp ARROW_STAR exp
{ write_exp_elt_opcode (STRUCTOP_MPTR); }
;
write_exp_elt_opcode (STRUCTOP_STRUCT); }
;
+exp : exp '.' name COMPLETE
+ { mark_struct_expression ();
+ write_exp_elt_opcode (STRUCTOP_STRUCT);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_STRUCT); }
+ ;
+
+exp : exp '.' COMPLETE
+ { struct stoken s;
+ mark_struct_expression ();
+ write_exp_elt_opcode (STRUCTOP_STRUCT);
+ s.ptr = "";
+ s.length = 0;
+ write_exp_string (s);
+ write_exp_elt_opcode (STRUCTOP_STRUCT); }
+ ;
+
exp : exp '.' qualified_name
{ /* exp.type::name becomes exp.*(&type::name) */
/* Note: this doesn't work if name is a
write_exp_elt_opcode (STRUCTOP_MEMBER); }
;
-exp : exp '.' '*' exp
+exp : exp DOT_STAR exp
{ write_exp_elt_opcode (STRUCTOP_MEMBER); }
;
write_exp_elt_opcode (OP_FUNCALL); }
;
+lcurly : '{'
+ { start_arglist (); }
+ ;
+
arglist :
;
{ arglist_len++; }
;
-exp : '{' type '}' exp %prec UNARY
+exp : exp '(' nonempty_typelist ')' const_or_volatile
+ { int i;
+ write_exp_elt_opcode (TYPE_INSTANCE);
+ write_exp_elt_longcst ((LONGEST) $<ivec>3[0]);
+ for (i = 0; i < $<ivec>3[0]; ++i)
+ write_exp_elt_type ($<tvec>3[i + 1]);
+ write_exp_elt_longcst((LONGEST) $<ivec>3[0]);
+ write_exp_elt_opcode (TYPE_INSTANCE);
+ free ($3);
+ }
+ ;
+
+rcurly : '}'
+ { $$ = end_arglist () - 1; }
+ ;
+exp : lcurly arglist rcurly %prec ARROW
+ { write_exp_elt_opcode (OP_ARRAY);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_longcst ((LONGEST) $3);
+ write_exp_elt_opcode (OP_ARRAY); }
+ ;
+
+exp : lcurly type rcurly exp %prec UNARY
{ write_exp_elt_opcode (UNOP_MEMVAL);
write_exp_elt_type ($2);
write_exp_elt_opcode (UNOP_MEMVAL); }
write_exp_elt_opcode (OP_LONG); }
;
+exp : CHAR
+ {
+ struct stoken_vector vec;
+ vec.len = 1;
+ vec.tokens = &$1;
+ write_exp_string_vector ($1.type, &vec);
+ }
+ ;
+
exp : NAME_OR_INT
{ YYSTYPE val;
parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
write_exp_elt_opcode (OP_LONG);
- write_exp_elt_type (val.typed_val.type);
- write_exp_elt_longcst ((LONGEST)val.typed_val.val);
+ write_exp_elt_type (val.typed_val_int.type);
+ write_exp_elt_longcst ((LONGEST)val.typed_val_int.val);
write_exp_elt_opcode (OP_LONG);
}
;
exp : FLOAT
{ write_exp_elt_opcode (OP_DOUBLE);
- write_exp_elt_type (builtin_type_double);
- write_exp_elt_dblcst ($1);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_dblcst ($1.dval);
write_exp_elt_opcode (OP_DOUBLE); }
;
-exp : variable
- ;
-
-exp : LAST
- { write_exp_elt_opcode (OP_LAST);
- write_exp_elt_longcst ((LONGEST) $1);
- write_exp_elt_opcode (OP_LAST); }
+exp : DECFLOAT
+ { write_exp_elt_opcode (OP_DECFLOAT);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_decfloatcst ($1.val);
+ write_exp_elt_opcode (OP_DECFLOAT); }
;
-exp : REGNAME
- { write_exp_elt_opcode (OP_REGISTER);
- write_exp_elt_longcst ((LONGEST) $1);
- write_exp_elt_opcode (OP_REGISTER); }
+exp : variable
;
exp : VARIABLE
- { write_exp_elt_opcode (OP_INTERNALVAR);
- write_exp_elt_intern ($1);
- write_exp_elt_opcode (OP_INTERNALVAR); }
+ {
+ write_dollar_variable ($1);
+ }
;
exp : SIZEOF '(' type ')' %prec UNARY
{ write_exp_elt_opcode (OP_LONG);
- write_exp_elt_type (builtin_type_int);
+ write_exp_elt_type (parse_type->builtin_int);
+ CHECK_TYPEDEF ($3);
write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
write_exp_elt_opcode (OP_LONG); }
;
-exp : STRING
- { write_exp_elt_opcode (OP_STRING);
- write_exp_string ($1);
- write_exp_elt_opcode (OP_STRING); }
+exp : REINTERPRET_CAST '<' type '>' '(' exp ')' %prec UNARY
+ { write_exp_elt_opcode (UNOP_REINTERPRET_CAST);
+ write_exp_elt_type ($3);
+ write_exp_elt_opcode (UNOP_REINTERPRET_CAST); }
+ ;
+
+exp : STATIC_CAST '<' type '>' '(' exp ')' %prec UNARY
+ { write_exp_elt_opcode (UNOP_CAST);
+ write_exp_elt_type ($3);
+ write_exp_elt_opcode (UNOP_CAST); }
+ ;
+
+exp : DYNAMIC_CAST '<' type '>' '(' exp ')' %prec UNARY
+ { write_exp_elt_opcode (UNOP_DYNAMIC_CAST);
+ write_exp_elt_type ($3);
+ write_exp_elt_opcode (UNOP_DYNAMIC_CAST); }
+ ;
+
+exp : CONST_CAST '<' type '>' '(' exp ')' %prec UNARY
+ { /* We could do more error checking here, but
+ it doesn't seem worthwhile. */
+ write_exp_elt_opcode (UNOP_CAST);
+ write_exp_elt_type ($3);
+ write_exp_elt_opcode (UNOP_CAST); }
+ ;
+
+string_exp:
+ STRING
+ {
+ /* We copy the string here, and not in the
+ lexer, to guarantee that we do not leak a
+ string. Note that we follow the
+ NUL-termination convention of the
+ lexer. */
+ struct typed_stoken *vec = XNEW (struct typed_stoken);
+ $$.len = 1;
+ $$.tokens = vec;
+
+ vec->type = $1.type;
+ vec->length = $1.length;
+ vec->ptr = malloc ($1.length + 1);
+ memcpy (vec->ptr, $1.ptr, $1.length + 1);
+ }
+
+ | string_exp STRING
+ {
+ /* Note that we NUL-terminate here, but just
+ for convenience. */
+ char *p;
+ ++$$.len;
+ $$.tokens = realloc ($$.tokens,
+ $$.len * sizeof (struct typed_stoken));
+
+ p = malloc ($2.length + 1);
+ memcpy (p, $2.ptr, $2.length + 1);
+
+ $$.tokens[$$.len - 1].type = $2.type;
+ $$.tokens[$$.len - 1].length = $2.length;
+ $$.tokens[$$.len - 1].ptr = p;
+ }
+ ;
+
+exp : string_exp
+ {
+ int i;
+ enum c_string_type type = C_STRING;
+
+ for (i = 0; i < $1.len; ++i)
+ {
+ switch ($1.tokens[i].type)
+ {
+ case C_STRING:
+ break;
+ case C_WIDE_STRING:
+ case C_STRING_16:
+ case C_STRING_32:
+ if (type != C_STRING
+ && type != $1.tokens[i].type)
+ error ("Undefined string concatenation.");
+ type = $1.tokens[i].type;
+ break;
+ default:
+ /* internal error */
+ internal_error (__FILE__, __LINE__,
+ "unrecognized type in string concatenation");
+ }
+ }
+
+ write_exp_string_vector (type, &$1);
+ for (i = 0; i < $1.len; ++i)
+ free ($1.tokens[i].ptr);
+ free ($1.tokens);
+ }
;
/* C++. */
-exp : THIS
- { write_exp_elt_opcode (OP_THIS);
- write_exp_elt_opcode (OP_THIS); }
+exp : TRUEKEYWORD
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (parse_type->builtin_bool);
+ write_exp_elt_longcst ((LONGEST) 1);
+ write_exp_elt_opcode (OP_LONG); }
+ ;
+
+exp : FALSEKEYWORD
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (parse_type->builtin_bool);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_opcode (OP_LONG); }
;
/* end of C++. */
block : BLOCKNAME
{
- if ($1.sym != 0)
- $$ = SYMBOL_BLOCK_VALUE ($1.sym);
+ if ($1.sym)
+ $$ = SYMBOL_BLOCK_VALUE ($1.sym);
else
- {
- struct symtab *tem =
- lookup_symtab (copy_name ($1.stoken));
- if (tem)
- $$ = BLOCKVECTOR_BLOCK
- (BLOCKVECTOR (tem), STATIC_BLOCK);
- else
- error ("No file or function \"%s\".",
- copy_name ($1.stoken));
- }
+ error ("No file or function \"%s\".",
+ copy_name ($1.stoken));
+ }
+ | FILENAME
+ {
+ $$ = $1;
}
;
block : block COLONCOLON name
{ struct symbol *tem
= lookup_symbol (copy_name ($3), $1,
- VAR_NAMESPACE, 0, NULL);
+ VAR_DOMAIN, (int *) NULL);
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
error ("No function \"%s\" in specified context.",
copy_name ($3));
variable: block COLONCOLON name
{ struct symbol *sym;
sym = lookup_symbol (copy_name ($3), $1,
- VAR_NAMESPACE, 0, NULL);
+ VAR_DOMAIN, (int *) NULL);
if (sym == 0)
error ("No symbol \"%s\" in specified context.",
copy_name ($3));
write_exp_elt_opcode (OP_VAR_VALUE);
+ /* block_found is set by lookup_symbol. */
+ write_exp_elt_block (block_found);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE); }
;
-qualified_name: typebase COLONCOLON name
+qualified_name: TYPENAME COLONCOLON name
{
- struct type *type = $1;
+ struct type *type = $1.type;
+ CHECK_TYPEDEF (type);
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
- && TYPE_CODE (type) != TYPE_CODE_UNION)
+ && TYPE_CODE (type) != TYPE_CODE_UNION
+ && TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
error ("`%s' is not defined as an aggregate type.",
TYPE_NAME (type));
write_exp_string ($3);
write_exp_elt_opcode (OP_SCOPE);
}
- | typebase COLONCOLON '~' name
+ | TYPENAME COLONCOLON '~' name
{
- struct type *type = $1;
+ struct type *type = $1.type;
struct stoken tmp_token;
+ CHECK_TYPEDEF (type);
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
- && TYPE_CODE (type) != TYPE_CODE_UNION)
+ && TYPE_CODE (type) != TYPE_CODE_UNION
+ && TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
error ("`%s' is not defined as an aggregate type.",
TYPE_NAME (type));
- if (!STREQ (type_name_no_tag (type), $4.ptr))
- error ("invalid destructor `%s::~%s'",
- type_name_no_tag (type), $4.ptr);
-
tmp_token.ptr = (char*) alloca ($4.length + 2);
tmp_token.length = $4.length + 1;
tmp_token.ptr[0] = '~';
memcpy (tmp_token.ptr+1, $4.ptr, $4.length);
tmp_token.ptr[tmp_token.length] = 0;
+
+ /* Check for valid destructor name. */
+ destructor_name_p (tmp_token.ptr, type);
write_exp_elt_opcode (OP_SCOPE);
write_exp_elt_type (type);
write_exp_string (tmp_token);
write_exp_elt_opcode (OP_SCOPE);
}
+ | TYPENAME COLONCOLON name COLONCOLON name
+ {
+ char *copy = copy_name ($3);
+ error (_("No type \"%s\" within class "
+ "or namespace \"%s\"."),
+ copy, TYPE_NAME ($1.type));
+ }
;
variable: qualified_name
- | COLONCOLON name
+ | COLONCOLON name_not_typename
{
- char *name = copy_name ($2);
+ char *name = copy_name ($2.stoken);
struct symbol *sym;
struct minimal_symbol *msymbol;
sym =
- lookup_symbol (name, 0, VAR_NAMESPACE, 0, NULL);
+ lookup_symbol (name, (const struct block *) NULL,
+ VAR_DOMAIN, (int *) NULL);
if (sym)
{
write_exp_elt_opcode (OP_VAR_VALUE);
+ write_exp_elt_block (NULL);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE);
break;
}
- msymbol = lookup_minimal_symbol (name,
- (struct objfile *) NULL);
+ msymbol = lookup_minimal_symbol (name, NULL, NULL);
if (msymbol != NULL)
- {
- write_exp_elt_opcode (OP_LONG);
- write_exp_elt_type (builtin_type_int);
- write_exp_elt_longcst ((LONGEST) SYMBOL_VALUE_ADDRESS (msymbol));
- write_exp_elt_opcode (OP_LONG);
- write_exp_elt_opcode (UNOP_MEMVAL);
- if (msymbol -> type == mst_data ||
- msymbol -> type == mst_bss)
- write_exp_elt_type (builtin_type_int);
- else if (msymbol -> type == mst_text)
- write_exp_elt_type (lookup_function_type (builtin_type_int));
- else
- write_exp_elt_type (builtin_type_char);
- write_exp_elt_opcode (UNOP_MEMVAL);
- }
+ write_exp_msymbol (msymbol);
+ else if (!have_full_symbols () && !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
else
- if (!have_full_symbols () && !have_partial_symbols ())
- error ("No symbol table is loaded. Use the \"file\" command.");
- else
- error ("No symbol \"%s\" in current context.", name);
+ error ("No symbol \"%s\" in current context.", name);
}
;
if (sym)
{
- switch (SYMBOL_CLASS (sym))
+ if (symbol_read_needs_frame (sym))
{
- case LOC_REGISTER:
- case LOC_ARG:
- case LOC_REF_ARG:
- case LOC_REGPARM:
- case LOC_LOCAL:
- case LOC_LOCAL_ARG:
- if (innermost_block == 0 ||
- contained_in (block_found,
- innermost_block))
+ if (innermost_block == 0
+ || contained_in (block_found,
+ innermost_block))
innermost_block = block_found;
- case LOC_UNDEF:
- case LOC_CONST:
- case LOC_STATIC:
- case LOC_TYPEDEF:
- case LOC_LABEL:
- case LOC_BLOCK:
- case LOC_CONST_BYTES:
-
- /* In this case the expression can
- be evaluated regardless of what
- frame we are in, so there is no
- need to check for the
- innermost_block. These cases are
- listed so that gcc -Wall will
- report types that may not have
- been considered. */
-
- break;
}
+
write_exp_elt_opcode (OP_VAR_VALUE);
+ /* We want to use the selected frame, not
+ another more inner frame which happens to
+ be in the same block. */
+ write_exp_elt_block (NULL);
write_exp_elt_sym (sym);
write_exp_elt_opcode (OP_VAR_VALUE);
}
/* C++: it hangs off of `this'. Must
not inadvertently convert from a method call
to data ref. */
- if (innermost_block == 0 ||
- contained_in (block_found, innermost_block))
+ if (innermost_block == 0
+ || contained_in (block_found,
+ innermost_block))
innermost_block = block_found;
write_exp_elt_opcode (OP_THIS);
write_exp_elt_opcode (OP_THIS);
else
{
struct minimal_symbol *msymbol;
- register char *arg = copy_name ($1.stoken);
+ char *arg = copy_name ($1.stoken);
- msymbol = lookup_minimal_symbol (arg,
- (struct objfile *) NULL);
+ msymbol =
+ lookup_minimal_symbol (arg, NULL, NULL);
if (msymbol != NULL)
- {
- write_exp_elt_opcode (OP_LONG);
- write_exp_elt_type (builtin_type_int);
- write_exp_elt_longcst ((LONGEST) SYMBOL_VALUE_ADDRESS (msymbol));
- write_exp_elt_opcode (OP_LONG);
- write_exp_elt_opcode (UNOP_MEMVAL);
- if (msymbol -> type == mst_data ||
- msymbol -> type == mst_bss)
- write_exp_elt_type (builtin_type_int);
- else if (msymbol -> type == mst_text)
- write_exp_elt_type (lookup_function_type (builtin_type_int));
- else
- write_exp_elt_type (builtin_type_char);
- write_exp_elt_opcode (UNOP_MEMVAL);
- }
+ write_exp_msymbol (msymbol);
else if (!have_full_symbols () && !have_partial_symbols ())
error ("No symbol table is loaded. Use the \"file\" command.");
else
}
;
-
-ptype : typebase
- | typebase abs_decl
- {
- /* This is where the interesting stuff happens. */
- int done = 0;
- int array_size;
- struct type *follow_type = $1;
- struct type *range_type;
-
- while (!done)
- switch (pop_type ())
- {
- case tp_end:
- done = 1;
- break;
- case tp_pointer:
- follow_type = lookup_pointer_type (follow_type);
- break;
- case tp_reference:
- follow_type = lookup_reference_type (follow_type);
- break;
- case tp_array:
- array_size = pop_type_int ();
- if (array_size != -1)
- {
- range_type =
- create_range_type ((struct type *) NULL,
- builtin_type_int, 0,
- array_size - 1);
- follow_type =
- create_array_type ((struct type *) NULL,
- follow_type, range_type);
- }
- else
- follow_type = lookup_pointer_type (follow_type);
- break;
- case tp_function:
- follow_type = lookup_function_type (follow_type);
- break;
- }
- $$ = follow_type;
+space_identifier : '@' NAME
+ { push_type_address_space (copy_name ($2.stoken));
+ push_type (tp_space_identifier);
}
;
+const_or_volatile: const_or_volatile_noopt
+ |
+ ;
+
+cv_with_space_id : const_or_volatile space_identifier const_or_volatile
+ ;
+
+const_or_volatile_or_space_identifier_noopt: cv_with_space_id
+ | const_or_volatile_noopt
+ ;
+
+const_or_volatile_or_space_identifier:
+ const_or_volatile_or_space_identifier_noopt
+ |
+ ;
+
abs_decl: '*'
{ push_type (tp_pointer); $$ = 0; }
| '*' abs_decl
push_type (tp_array);
$$ = 0;
}
+
| direct_abs_decl func_mod
{ push_type (tp_function); }
| func_mod
func_mod: '(' ')'
{ $$ = 0; }
| '(' nonempty_typelist ')'
- { free ((PTR)$2); $$ = 0; }
+ { free ($2); $$ = 0; }
;
+/* We used to try to recognize pointer to member types here, but
+ that didn't work (shift/reduce conflicts meant that these rules never
+ got executed). The problem is that
+ int (foo::bar::baz::bizzle)
+ is a function type but
+ int (foo::bar::baz::bizzle::*)
+ is a pointer to member type. Stroustrup loses again! */
+
type : ptype
- | typebase COLONCOLON '*'
- { $$ = lookup_member_type (builtin_type_int, $1); }
- | type '(' typebase COLONCOLON '*' ')'
- { $$ = lookup_member_type ($1, $3); }
- | type '(' typebase COLONCOLON '*' ')' '(' ')'
- { $$ = lookup_member_type
- (lookup_function_type ($1), $3); }
- | type '(' typebase COLONCOLON '*' ')' '(' nonempty_typelist ')'
- { $$ = lookup_member_type
- (lookup_function_type ($1), $3);
- free ((PTR)$8); }
;
typebase /* Implements (approximately): (type-qualifier)* type-specifier */
: TYPENAME
{ $$ = $1.type; }
| INT_KEYWORD
- { $$ = builtin_type_int; }
+ { $$ = parse_type->builtin_int; }
| LONG
- { $$ = builtin_type_long; }
+ { $$ = parse_type->builtin_long; }
| SHORT
- { $$ = builtin_type_short; }
+ { $$ = parse_type->builtin_short; }
| LONG INT_KEYWORD
- { $$ = builtin_type_long; }
+ { $$ = parse_type->builtin_long; }
+ | LONG SIGNED_KEYWORD INT_KEYWORD
+ { $$ = parse_type->builtin_long; }
+ | LONG SIGNED_KEYWORD
+ { $$ = parse_type->builtin_long; }
+ | SIGNED_KEYWORD LONG INT_KEYWORD
+ { $$ = parse_type->builtin_long; }
| UNSIGNED LONG INT_KEYWORD
- { $$ = builtin_type_unsigned_long; }
+ { $$ = parse_type->builtin_unsigned_long; }
+ | LONG UNSIGNED INT_KEYWORD
+ { $$ = parse_type->builtin_unsigned_long; }
+ | LONG UNSIGNED
+ { $$ = parse_type->builtin_unsigned_long; }
| LONG LONG
- { $$ = builtin_type_long_long; }
+ { $$ = parse_type->builtin_long_long; }
| LONG LONG INT_KEYWORD
- { $$ = builtin_type_long_long; }
+ { $$ = parse_type->builtin_long_long; }
+ | LONG LONG SIGNED_KEYWORD INT_KEYWORD
+ { $$ = parse_type->builtin_long_long; }
+ | LONG LONG SIGNED_KEYWORD
+ { $$ = parse_type->builtin_long_long; }
+ | SIGNED_KEYWORD LONG LONG
+ { $$ = parse_type->builtin_long_long; }
+ | SIGNED_KEYWORD LONG LONG INT_KEYWORD
+ { $$ = parse_type->builtin_long_long; }
| UNSIGNED LONG LONG
- { $$ = builtin_type_unsigned_long_long; }
+ { $$ = parse_type->builtin_unsigned_long_long; }
| UNSIGNED LONG LONG INT_KEYWORD
- { $$ = builtin_type_unsigned_long_long; }
+ { $$ = parse_type->builtin_unsigned_long_long; }
+ | LONG LONG UNSIGNED
+ { $$ = parse_type->builtin_unsigned_long_long; }
+ | LONG LONG UNSIGNED INT_KEYWORD
+ { $$ = parse_type->builtin_unsigned_long_long; }
| SHORT INT_KEYWORD
- { $$ = builtin_type_short; }
+ { $$ = parse_type->builtin_short; }
+ | SHORT SIGNED_KEYWORD INT_KEYWORD
+ { $$ = parse_type->builtin_short; }
+ | SHORT SIGNED_KEYWORD
+ { $$ = parse_type->builtin_short; }
| UNSIGNED SHORT INT_KEYWORD
- { $$ = builtin_type_unsigned_short; }
+ { $$ = parse_type->builtin_unsigned_short; }
+ | SHORT UNSIGNED
+ { $$ = parse_type->builtin_unsigned_short; }
+ | SHORT UNSIGNED INT_KEYWORD
+ { $$ = parse_type->builtin_unsigned_short; }
+ | DOUBLE_KEYWORD
+ { $$ = parse_type->builtin_double; }
+ | LONG DOUBLE_KEYWORD
+ { $$ = parse_type->builtin_long_double; }
| STRUCT name
{ $$ = lookup_struct (copy_name ($2),
expression_context_block); }
{ $$ = lookup_enum (copy_name ($2),
expression_context_block); }
| UNSIGNED typename
- { $$ = lookup_unsigned_typename (TYPE_NAME($2.type)); }
+ { $$ = lookup_unsigned_typename (parse_language,
+ parse_gdbarch,
+ TYPE_NAME($2.type)); }
| UNSIGNED
- { $$ = builtin_type_unsigned_int; }
+ { $$ = parse_type->builtin_unsigned_int; }
| SIGNED_KEYWORD typename
- { $$ = lookup_signed_typename (TYPE_NAME($2.type)); }
+ { $$ = lookup_signed_typename (parse_language,
+ parse_gdbarch,
+ TYPE_NAME($2.type)); }
| SIGNED_KEYWORD
- { $$ = builtin_type_int; }
+ { $$ = parse_type->builtin_int; }
+ /* It appears that this rule for templates is never
+ reduced; template recognition happens by lookahead
+ in the token processing code in yylex. */
| TEMPLATE name '<' type '>'
{ $$ = lookup_template_type(copy_name($2), $4,
expression_context_block);
}
- /* "const" and "volatile" are curently ignored. */
- | CONST_KEYWORD typebase { $$ = $2; }
- | VOLATILE_KEYWORD typebase { $$ = $2; }
+ | const_or_volatile_or_space_identifier_noopt typebase
+ { $$ = follow_types ($2); }
+ | typebase const_or_volatile_or_space_identifier_noopt
+ { $$ = follow_types ($1); }
;
typename: TYPENAME
{
$$.stoken.ptr = "int";
$$.stoken.length = 3;
- $$.type = builtin_type_int;
+ $$.type = parse_type->builtin_int;
}
| LONG
{
$$.stoken.ptr = "long";
$$.stoken.length = 4;
- $$.type = builtin_type_long;
+ $$.type = parse_type->builtin_long;
}
| SHORT
{
$$.stoken.ptr = "short";
$$.stoken.length = 5;
- $$.type = builtin_type_short;
+ $$.type = parse_type->builtin_short;
}
;
}
;
+ptype : typebase
+ | ptype const_or_volatile_or_space_identifier abs_decl const_or_volatile_or_space_identifier
+ { $$ = follow_types ($1); }
+ ;
+
+const_and_volatile: CONST_KEYWORD VOLATILE_KEYWORD
+ | VOLATILE_KEYWORD CONST_KEYWORD
+ ;
+
+const_or_volatile_noopt: const_and_volatile
+ { push_type (tp_const);
+ push_type (tp_volatile);
+ }
+ | CONST_KEYWORD
+ { push_type (tp_const); }
+ | VOLATILE_KEYWORD
+ { push_type (tp_volatile); }
+ ;
+
+operator: OPERATOR NEW
+ { $$ = operator_stoken (" new"); }
+ | OPERATOR DELETE
+ { $$ = operator_stoken (" delete"); }
+ | OPERATOR NEW '[' ']'
+ { $$ = operator_stoken (" new[]"); }
+ | OPERATOR DELETE '[' ']'
+ { $$ = operator_stoken (" delete[]"); }
+ | OPERATOR '+'
+ { $$ = operator_stoken ("+"); }
+ | OPERATOR '-'
+ { $$ = operator_stoken ("-"); }
+ | OPERATOR '*'
+ { $$ = operator_stoken ("*"); }
+ | OPERATOR '/'
+ { $$ = operator_stoken ("/"); }
+ | OPERATOR '%'
+ { $$ = operator_stoken ("%"); }
+ | OPERATOR '^'
+ { $$ = operator_stoken ("^"); }
+ | OPERATOR '&'
+ { $$ = operator_stoken ("&"); }
+ | OPERATOR '|'
+ { $$ = operator_stoken ("|"); }
+ | OPERATOR '~'
+ { $$ = operator_stoken ("~"); }
+ | OPERATOR '!'
+ { $$ = operator_stoken ("!"); }
+ | OPERATOR '='
+ { $$ = operator_stoken ("="); }
+ | OPERATOR '<'
+ { $$ = operator_stoken ("<"); }
+ | OPERATOR '>'
+ { $$ = operator_stoken (">"); }
+ | OPERATOR ASSIGN_MODIFY
+ { const char *op = "unknown";
+ switch ($2)
+ {
+ case BINOP_RSH:
+ op = ">>=";
+ break;
+ case BINOP_LSH:
+ op = "<<=";
+ break;
+ case BINOP_ADD:
+ op = "+=";
+ break;
+ case BINOP_SUB:
+ op = "-=";
+ break;
+ case BINOP_MUL:
+ op = "*=";
+ break;
+ case BINOP_DIV:
+ op = "/=";
+ break;
+ case BINOP_REM:
+ op = "%=";
+ break;
+ case BINOP_BITWISE_IOR:
+ op = "|=";
+ break;
+ case BINOP_BITWISE_AND:
+ op = "&=";
+ break;
+ case BINOP_BITWISE_XOR:
+ op = "^=";
+ break;
+ default:
+ break;
+ }
+
+ $$ = operator_stoken (op);
+ }
+ | OPERATOR LSH
+ { $$ = operator_stoken ("<<"); }
+ | OPERATOR RSH
+ { $$ = operator_stoken (">>"); }
+ | OPERATOR EQUAL
+ { $$ = operator_stoken ("=="); }
+ | OPERATOR NOTEQUAL
+ { $$ = operator_stoken ("!="); }
+ | OPERATOR LEQ
+ { $$ = operator_stoken ("<="); }
+ | OPERATOR GEQ
+ { $$ = operator_stoken (">="); }
+ | OPERATOR ANDAND
+ { $$ = operator_stoken ("&&"); }
+ | OPERATOR OROR
+ { $$ = operator_stoken ("||"); }
+ | OPERATOR INCREMENT
+ { $$ = operator_stoken ("++"); }
+ | OPERATOR DECREMENT
+ { $$ = operator_stoken ("--"); }
+ | OPERATOR ','
+ { $$ = operator_stoken (","); }
+ | OPERATOR ARROW_STAR
+ { $$ = operator_stoken ("->*"); }
+ | OPERATOR ARROW
+ { $$ = operator_stoken ("->"); }
+ | OPERATOR '(' ')'
+ { $$ = operator_stoken ("()"); }
+ | OPERATOR '[' ']'
+ { $$ = operator_stoken ("[]"); }
+ | OPERATOR ptype
+ { char *name;
+ long length;
+ struct ui_file *buf = mem_fileopen ();
+
+ c_print_type ($2, NULL, buf, -1, 0);
+ name = ui_file_xstrdup (buf, &length);
+ ui_file_delete (buf);
+ $$ = operator_stoken (name);
+ free (name);
+ }
+ ;
+
+
+
name : NAME { $$ = $1.stoken; }
| BLOCKNAME { $$ = $1.stoken; }
| TYPENAME { $$ = $1.stoken; }
| NAME_OR_INT { $$ = $1.stoken; }
+ | operator { $$ = $1; }
;
name_not_typename : NAME
%%
+/* Returns a stoken of the operator name given by OP (which does not
+ include the string "operator"). */
+static struct stoken
+operator_stoken (const char *op)
+{
+ static const char *operator_string = "operator";
+ struct stoken st = { NULL, 0 };
+ st.length = strlen (operator_string) + strlen (op);
+ st.ptr = malloc (st.length + 1);
+ strcpy (st.ptr, operator_string);
+ strcat (st.ptr, op);
+
+ /* The toplevel (c_parse) will free the memory allocated here. */
+ make_cleanup (free, st.ptr);
+ return st;
+};
+
/* Take care of parsing a number (anything that starts with a digit).
Set yylval and return the token type; update lexptr.
LEN is the number of characters in it. */
/*** Needs some error checking for the float case ***/
static int
-parse_number (p, len, parsed_float, putithere)
- register char *p;
- register int len;
- int parsed_float;
- YYSTYPE *putithere;
+parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere)
{
- register LONGEST n = 0;
- register LONGEST prevn = 0;
- register int i;
- register int c;
- register int base = input_radix;
+ /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
+ here, and we do kind of silly things like cast to unsigned. */
+ LONGEST n = 0;
+ LONGEST prevn = 0;
+ ULONGEST un;
+
+ int i = 0;
+ int c;
+ int base = input_radix;
int unsigned_p = 0;
+
+ /* Number of "L" suffixes encountered. */
int long_p = 0;
- LONGEST high_bit;
+
+ /* We have found a "L" or "U" suffix. */
+ int found_suffix = 0;
+
+ ULONGEST high_bit;
struct type *signed_type;
struct type *unsigned_type;
if (parsed_float)
{
/* It's a float since it contains a point or an exponent. */
- putithere->dval = atof (p);
+ char *s;
+ int num; /* number of tokens scanned by scanf */
+ char saved_char;
+
+ /* If it ends at "df", "dd" or "dl", take it as type of decimal floating
+ point. Return DECFLOAT. */
+
+ if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'f')
+ {
+ p[len - 2] = '\0';
+ putithere->typed_val_decfloat.type
+ = parse_type->builtin_decfloat;
+ decimal_from_string (putithere->typed_val_decfloat.val, 4,
+ gdbarch_byte_order (parse_gdbarch), p);
+ p[len - 2] = 'd';
+ return DECFLOAT;
+ }
+
+ if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'd')
+ {
+ p[len - 2] = '\0';
+ putithere->typed_val_decfloat.type
+ = parse_type->builtin_decdouble;
+ decimal_from_string (putithere->typed_val_decfloat.val, 8,
+ gdbarch_byte_order (parse_gdbarch), p);
+ p[len - 2] = 'd';
+ return DECFLOAT;
+ }
+
+ if (len >= 2 && p[len - 2] == 'd' && p[len - 1] == 'l')
+ {
+ p[len - 2] = '\0';
+ putithere->typed_val_decfloat.type
+ = parse_type->builtin_declong;
+ decimal_from_string (putithere->typed_val_decfloat.val, 16,
+ gdbarch_byte_order (parse_gdbarch), p);
+ p[len - 2] = 'd';
+ return DECFLOAT;
+ }
+
+ s = malloc (len);
+ saved_char = p[len];
+ p[len] = 0; /* null-terminate the token */
+ num = sscanf (p, "%" DOUBLEST_SCAN_FORMAT "%s",
+ &putithere->typed_val_float.dval, s);
+ p[len] = saved_char; /* restore the input stream */
+
+ if (num == 1)
+ putithere->typed_val_float.type =
+ parse_type->builtin_double;
+
+ if (num == 2 )
+ {
+ /* See if it has any float suffix: 'f' for float, 'l' for long
+ double. */
+ if (!strcasecmp (s, "f"))
+ putithere->typed_val_float.type =
+ parse_type->builtin_float;
+ else if (!strcasecmp (s, "l"))
+ putithere->typed_val_float.type =
+ parse_type->builtin_long_double;
+ else
+ {
+ free (s);
+ return ERROR;
+ }
+ }
+
+ free (s);
return FLOAT;
}
}
break;
+ case 'b':
+ case 'B':
+ if (len >= 3)
+ {
+ p += 2;
+ base = 2;
+ len -= 2;
+ }
+ break;
+
case 't':
case 'T':
case 'd':
if (c != 'l' && c != 'u')
n *= base;
if (c >= '0' && c <= '9')
- n += i = c - '0';
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - '0';
+ }
else
{
if (base > 10 && c >= 'a' && c <= 'f')
- n += i = c - 'a' + 10;
- else if (len == 0 && c == 'l')
- long_p = 1;
- else if (len == 0 && c == 'u')
- unsigned_p = 1;
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - 'a' + 10;
+ }
+ else if (c == 'l')
+ {
+ ++long_p;
+ found_suffix = 1;
+ }
+ else if (c == 'u')
+ {
+ unsigned_p = 1;
+ found_suffix = 1;
+ }
else
return ERROR; /* Char not a digit */
}
return ERROR; /* Invalid digit in this base */
/* Portably test for overflow (only works for nonzero values, so make
- a second check for zero). */
- if((prevn >= n) && n != 0)
- unsigned_p=1; /* Try something unsigned */
- /* If range checking enabled, portably test for unsigned overflow. */
- if(RANGE_CHECK && n!=0)
- {
- if((unsigned_p && (unsigned)prevn >= (unsigned)n))
- range_error("Overflow on numeric constant.");
- }
- prevn=n;
+ a second check for zero). FIXME: Can't we just make n and prevn
+ unsigned and avoid this? */
+ if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
+ unsigned_p = 1; /* Try something unsigned */
+
+ /* Portably test for unsigned overflow.
+ FIXME: This check is wrong; for example it doesn't find overflow
+ on 0x123456789 when LONGEST is 32 bits. */
+ if (c != 'l' && c != 'u' && n != 0)
+ {
+ if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
+ error ("Numeric constant too large.");
+ }
+ prevn = n;
}
-
- /* If the number is too big to be an int, or it's got an l suffix
- then it's a long. Work out if this has to be a long by
- shifting right and and seeing if anything remains, and the
- target int size is different to the target long size. */
- if ((TARGET_INT_BIT != TARGET_LONG_BIT && (n >> TARGET_INT_BIT)) || long_p)
- {
- high_bit = ((LONGEST)1) << (TARGET_LONG_BIT-1);
- unsigned_type = builtin_type_unsigned_long;
- signed_type = builtin_type_long;
- }
- else
- {
- high_bit = ((LONGEST)1) << (TARGET_INT_BIT-1);
- unsigned_type = builtin_type_unsigned_int;
- signed_type = builtin_type_int;
- }
+ /* An integer constant is an int, a long, or a long long. An L
+ suffix forces it to be long; an LL suffix forces it to be long
+ long. If not forced to a larger size, it gets the first type of
+ the above that it fits in. To figure out whether it fits, we
+ shift it right and see whether anything remains. Note that we
+ can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
+ operation, because many compilers will warn about such a shift
+ (which always produces a zero result). Sometimes gdbarch_int_bit
+ or gdbarch_long_bit will be that big, sometimes not. To deal with
+ the case where it is we just always shift the value more than
+ once, with fewer bits each time. */
+
+ un = (ULONGEST)n >> 2;
+ if (long_p == 0
+ && (un >> (gdbarch_int_bit (parse_gdbarch) - 2)) == 0)
+ {
+ high_bit = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch) - 1);
+
+ /* A large decimal (not hex or octal) constant (between INT_MAX
+ and UINT_MAX) is a long or unsigned long, according to ANSI,
+ never an unsigned int, but this code treats it as unsigned
+ int. This probably should be fixed. GCC gives a warning on
+ such constants. */
+
+ unsigned_type = parse_type->builtin_unsigned_int;
+ signed_type = parse_type->builtin_int;
+ }
+ else if (long_p <= 1
+ && (un >> (gdbarch_long_bit (parse_gdbarch) - 2)) == 0)
+ {
+ high_bit = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch) - 1);
+ unsigned_type = parse_type->builtin_unsigned_long;
+ signed_type = parse_type->builtin_long;
+ }
+ else
+ {
+ int shift;
+ if (sizeof (ULONGEST) * HOST_CHAR_BIT
+ < gdbarch_long_long_bit (parse_gdbarch))
+ /* A long long does not fit in a LONGEST. */
+ shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
+ else
+ shift = (gdbarch_long_long_bit (parse_gdbarch) - 1);
+ high_bit = (ULONGEST) 1 << shift;
+ unsigned_type = parse_type->builtin_unsigned_long_long;
+ signed_type = parse_type->builtin_long_long;
+ }
- putithere->typed_val.val = n;
+ putithere->typed_val_int.val = n;
/* If the high bit of the worked out type is set then this number
has to be unsigned. */
if (unsigned_p || (n & high_bit))
{
- putithere->typed_val.type = unsigned_type;
+ putithere->typed_val_int.type = unsigned_type;
}
else
{
- putithere->typed_val.type = signed_type;
+ putithere->typed_val_int.type = signed_type;
}
return INT;
}
+/* Temporary obstack used for holding strings. */
+static struct obstack tempbuf;
+static int tempbuf_init;
+
+/* Parse a C escape sequence. The initial backslash of the sequence
+ is at (*PTR)[-1]. *PTR will be updated to point to just after the
+ last character of the sequence. If OUTPUT is not NULL, the
+ translated form of the escape sequence will be written there. If
+ OUTPUT is NULL, no output is written and the call will only affect
+ *PTR. If an escape sequence is expressed in target bytes, then the
+ entire sequence will simply be copied to OUTPUT. Return 1 if any
+ character was emitted, 0 otherwise. */
+
+int
+c_parse_escape (char **ptr, struct obstack *output)
+{
+ char *tokptr = *ptr;
+ int result = 1;
+
+ /* Some escape sequences undergo character set conversion. Those we
+ translate here. */
+ switch (*tokptr)
+ {
+ /* Hex escapes do not undergo character set conversion, so keep
+ the escape sequence for later. */
+ case 'x':
+ if (output)
+ obstack_grow_str (output, "\\x");
+ ++tokptr;
+ if (!isxdigit (*tokptr))
+ error (_("\\x escape without a following hex digit"));
+ while (isxdigit (*tokptr))
+ {
+ if (output)
+ obstack_1grow (output, *tokptr);
+ ++tokptr;
+ }
+ break;
+
+ /* Octal escapes do not undergo character set conversion, so
+ keep the escape sequence for later. */
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ {
+ int i;
+ if (output)
+ obstack_grow_str (output, "\\");
+ for (i = 0;
+ i < 3 && isdigit (*tokptr) && *tokptr != '8' && *tokptr != '9';
+ ++i)
+ {
+ if (output)
+ obstack_1grow (output, *tokptr);
+ ++tokptr;
+ }
+ }
+ break;
+
+ /* We handle UCNs later. We could handle them here, but that
+ would mean a spurious error in the case where the UCN could
+ be converted to the target charset but not the host
+ charset. */
+ case 'u':
+ case 'U':
+ {
+ char c = *tokptr;
+ int i, len = c == 'U' ? 8 : 4;
+ if (output)
+ {
+ obstack_1grow (output, '\\');
+ obstack_1grow (output, *tokptr);
+ }
+ ++tokptr;
+ if (!isxdigit (*tokptr))
+ error (_("\\%c escape without a following hex digit"), c);
+ for (i = 0; i < len && isxdigit (*tokptr); ++i)
+ {
+ if (output)
+ obstack_1grow (output, *tokptr);
+ ++tokptr;
+ }
+ }
+ break;
+
+ /* We must pass backslash through so that it does not
+ cause quoting during the second expansion. */
+ case '\\':
+ if (output)
+ obstack_grow_str (output, "\\\\");
+ ++tokptr;
+ break;
+
+ /* Escapes which undergo conversion. */
+ case 'a':
+ if (output)
+ obstack_1grow (output, '\a');
+ ++tokptr;
+ break;
+ case 'b':
+ if (output)
+ obstack_1grow (output, '\b');
+ ++tokptr;
+ break;
+ case 'f':
+ if (output)
+ obstack_1grow (output, '\f');
+ ++tokptr;
+ break;
+ case 'n':
+ if (output)
+ obstack_1grow (output, '\n');
+ ++tokptr;
+ break;
+ case 'r':
+ if (output)
+ obstack_1grow (output, '\r');
+ ++tokptr;
+ break;
+ case 't':
+ if (output)
+ obstack_1grow (output, '\t');
+ ++tokptr;
+ break;
+ case 'v':
+ if (output)
+ obstack_1grow (output, '\v');
+ ++tokptr;
+ break;
+
+ /* GCC extension. */
+ case 'e':
+ if (output)
+ obstack_1grow (output, HOST_ESCAPE_CHAR);
+ ++tokptr;
+ break;
+
+ /* Backslash-newline expands to nothing at all. */
+ case '\n':
+ ++tokptr;
+ result = 0;
+ break;
+
+ /* A few escapes just expand to the character itself. */
+ case '\'':
+ case '\"':
+ case '?':
+ /* GCC extensions. */
+ case '(':
+ case '{':
+ case '[':
+ case '%':
+ /* Unrecognized escapes turn into the character itself. */
+ default:
+ if (output)
+ obstack_1grow (output, *tokptr);
+ ++tokptr;
+ break;
+ }
+ *ptr = tokptr;
+ return result;
+}
+
+/* Parse a string or character literal from TOKPTR. The string or
+ character may be wide or unicode. *OUTPTR is set to just after the
+ end of the literal in the input string. The resulting token is
+ stored in VALUE. This returns a token value, either STRING or
+ CHAR, depending on what was parsed. *HOST_CHARS is set to the
+ number of host characters in the literal. */
+static int
+parse_string_or_char (char *tokptr, char **outptr, struct typed_stoken *value,
+ int *host_chars)
+{
+ int quote, i;
+ enum c_string_type type;
+
+ /* Build the gdb internal form of the input string in tempbuf. Note
+ that the buffer is null byte terminated *only* for the
+ convenience of debugging gdb itself and printing the buffer
+ contents when the buffer contains no embedded nulls. Gdb does
+ not depend upon the buffer being null byte terminated, it uses
+ the length string instead. This allows gdb to handle C strings
+ (as well as strings in other languages) with embedded null
+ bytes */
+
+ if (!tempbuf_init)
+ tempbuf_init = 1;
+ else
+ obstack_free (&tempbuf, NULL);
+ obstack_init (&tempbuf);
+
+ /* Record the string type. */
+ if (*tokptr == 'L')
+ {
+ type = C_WIDE_STRING;
+ ++tokptr;
+ }
+ else if (*tokptr == 'u')
+ {
+ type = C_STRING_16;
+ ++tokptr;
+ }
+ else if (*tokptr == 'U')
+ {
+ type = C_STRING_32;
+ ++tokptr;
+ }
+ else
+ type = C_STRING;
+
+ /* Skip the quote. */
+ quote = *tokptr;
+ if (quote == '\'')
+ type |= C_CHAR;
+ ++tokptr;
+
+ *host_chars = 0;
+
+ while (*tokptr)
+ {
+ char c = *tokptr;
+ if (c == '\\')
+ {
+ ++tokptr;
+ *host_chars += c_parse_escape (&tokptr, &tempbuf);
+ }
+ else if (c == quote)
+ break;
+ else
+ {
+ obstack_1grow (&tempbuf, c);
+ ++tokptr;
+ /* FIXME: this does the wrong thing with multi-byte host
+ characters. We could use mbrlen here, but that would
+ make "set host-charset" a bit less useful. */
+ ++*host_chars;
+ }
+ }
+
+ if (*tokptr != quote)
+ {
+ if (quote == '"')
+ error ("Unterminated string in expression.");
+ else
+ error ("Unmatched single quote.");
+ }
+ ++tokptr;
+
+ value->type = type;
+ value->ptr = obstack_base (&tempbuf);
+ value->length = obstack_object_size (&tempbuf);
+
+ *outptr = tokptr;
+
+ return quote == '"' ? STRING : CHAR;
+}
+
struct token
{
char *operator;
int token;
enum exp_opcode opcode;
+ int cxx_only;
};
static const struct token tokentab3[] =
{
- {">>=", ASSIGN_MODIFY, BINOP_RSH},
- {"<<=", ASSIGN_MODIFY, BINOP_LSH}
+ {">>=", ASSIGN_MODIFY, BINOP_RSH, 0},
+ {"<<=", ASSIGN_MODIFY, BINOP_LSH, 0},
+ {"->*", ARROW_STAR, BINOP_END, 1}
};
static const struct token tokentab2[] =
{
- {"+=", ASSIGN_MODIFY, BINOP_ADD},
- {"-=", ASSIGN_MODIFY, BINOP_SUB},
- {"*=", ASSIGN_MODIFY, BINOP_MUL},
- {"/=", ASSIGN_MODIFY, BINOP_DIV},
- {"%=", ASSIGN_MODIFY, BINOP_REM},
- {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR},
- {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND},
- {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR},
- {"++", INCREMENT, BINOP_END},
- {"--", DECREMENT, BINOP_END},
- {"->", ARROW, BINOP_END},
- {"&&", ANDAND, BINOP_END},
- {"||", OROR, BINOP_END},
- {"::", COLONCOLON, BINOP_END},
- {"<<", LSH, BINOP_END},
- {">>", RSH, BINOP_END},
- {"==", EQUAL, BINOP_END},
- {"!=", NOTEQUAL, BINOP_END},
- {"<=", LEQ, BINOP_END},
- {">=", GEQ, BINOP_END}
+ {"+=", ASSIGN_MODIFY, BINOP_ADD, 0},
+ {"-=", ASSIGN_MODIFY, BINOP_SUB, 0},
+ {"*=", ASSIGN_MODIFY, BINOP_MUL, 0},
+ {"/=", ASSIGN_MODIFY, BINOP_DIV, 0},
+ {"%=", ASSIGN_MODIFY, BINOP_REM, 0},
+ {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 0},
+ {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND, 0},
+ {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 0},
+ {"++", INCREMENT, BINOP_END, 0},
+ {"--", DECREMENT, BINOP_END, 0},
+ {"->", ARROW, BINOP_END, 0},
+ {"&&", ANDAND, BINOP_END, 0},
+ {"||", OROR, BINOP_END, 0},
+ /* "::" is *not* only C++: gdb overrides its meaning in several
+ different ways, e.g., 'filename'::func, function::variable. */
+ {"::", COLONCOLON, BINOP_END, 0},
+ {"<<", LSH, BINOP_END, 0},
+ {">>", RSH, BINOP_END, 0},
+ {"==", EQUAL, BINOP_END, 0},
+ {"!=", NOTEQUAL, BINOP_END, 0},
+ {"<=", LEQ, BINOP_END, 0},
+ {">=", GEQ, BINOP_END, 0},
+ {".*", DOT_STAR, BINOP_END, 1}
};
+/* Identifier-like tokens. */
+static const struct token ident_tokens[] =
+ {
+ {"unsigned", UNSIGNED, OP_NULL, 0},
+ {"template", TEMPLATE, OP_NULL, 1},
+ {"volatile", VOLATILE_KEYWORD, OP_NULL, 0},
+ {"struct", STRUCT, OP_NULL, 0},
+ {"signed", SIGNED_KEYWORD, OP_NULL, 0},
+ {"sizeof", SIZEOF, OP_NULL, 0},
+ {"double", DOUBLE_KEYWORD, OP_NULL, 0},
+ {"false", FALSEKEYWORD, OP_NULL, 1},
+ {"class", CLASS, OP_NULL, 1},
+ {"union", UNION, OP_NULL, 0},
+ {"short", SHORT, OP_NULL, 0},
+ {"const", CONST_KEYWORD, OP_NULL, 0},
+ {"enum", ENUM, OP_NULL, 0},
+ {"long", LONG, OP_NULL, 0},
+ {"true", TRUEKEYWORD, OP_NULL, 1},
+ {"int", INT_KEYWORD, OP_NULL, 0},
+ {"new", NEW, OP_NULL, 1},
+ {"delete", DELETE, OP_NULL, 1},
+ {"operator", OPERATOR, OP_NULL, 1},
+
+ {"and", ANDAND, BINOP_END, 1},
+ {"and_eq", ASSIGN_MODIFY, BINOP_BITWISE_AND, 1},
+ {"bitand", '&', OP_NULL, 1},
+ {"bitor", '|', OP_NULL, 1},
+ {"compl", '~', OP_NULL, 1},
+ {"not", '!', OP_NULL, 1},
+ {"not_eq", NOTEQUAL, BINOP_END, 1},
+ {"or", OROR, BINOP_END, 1},
+ {"or_eq", ASSIGN_MODIFY, BINOP_BITWISE_IOR, 1},
+ {"xor", '^', OP_NULL, 1},
+ {"xor_eq", ASSIGN_MODIFY, BINOP_BITWISE_XOR, 1},
+
+ {"const_cast", CONST_CAST, OP_NULL, 1 },
+ {"dynamic_cast", DYNAMIC_CAST, OP_NULL, 1 },
+ {"static_cast", STATIC_CAST, OP_NULL, 1 },
+ {"reinterpret_cast", REINTERPRET_CAST, OP_NULL, 1 }
+ };
+
+/* When we find that lexptr (the global var defined in parse.c) is
+ pointing at a macro invocation, we expand the invocation, and call
+ scan_macro_expansion to save the old lexptr here and point lexptr
+ into the expanded text. When we reach the end of that, we call
+ end_macro_expansion to pop back to the value we saved here. The
+ macro expansion code promises to return only fully-expanded text,
+ so we don't need to "push" more than one level.
+
+ This is disgusting, of course. It would be cleaner to do all macro
+ expansion beforehand, and then hand that to lexptr. But we don't
+ really know where the expression ends. Remember, in a command like
+
+ (gdb) break *ADDRESS if CONDITION
+
+ we evaluate ADDRESS in the scope of the current frame, but we
+ evaluate CONDITION in the scope of the breakpoint's location. So
+ it's simply wrong to try to macro-expand the whole thing at once. */
+static char *macro_original_text;
+
+/* We save all intermediate macro expansions on this obstack for the
+ duration of a single parse. The expansion text may sometimes have
+ to live past the end of the expansion, due to yacc lookahead.
+ Rather than try to be clever about saving the data for a single
+ token, we simply keep it all and delete it after parsing has
+ completed. */
+static struct obstack expansion_obstack;
+
+static void
+scan_macro_expansion (char *expansion)
+{
+ char *copy;
+
+ /* We'd better not be trying to push the stack twice. */
+ gdb_assert (! macro_original_text);
+
+ /* Copy to the obstack, and then free the intermediate
+ expansion. */
+ copy = obstack_copy0 (&expansion_obstack, expansion, strlen (expansion));
+ xfree (expansion);
+
+ /* Save the old lexptr value, so we can return to it when we're done
+ parsing the expanded text. */
+ macro_original_text = lexptr;
+ lexptr = copy;
+}
+
+
+static int
+scanning_macro_expansion (void)
+{
+ return macro_original_text != 0;
+}
+
+
+static void
+finished_macro_expansion (void)
+{
+ /* There'd better be something to pop back to. */
+ gdb_assert (macro_original_text);
+
+ /* Pop back to the original text. */
+ lexptr = macro_original_text;
+ macro_original_text = 0;
+}
+
+
+static void
+scan_macro_cleanup (void *dummy)
+{
+ if (macro_original_text)
+ finished_macro_expansion ();
+
+ obstack_free (&expansion_obstack, NULL);
+}
+
+/* Return true iff the token represents a C++ cast operator. */
+
+static int
+is_cast_operator (const char *token, int len)
+{
+ return (! strncmp (token, "dynamic_cast", len)
+ || ! strncmp (token, "static_cast", len)
+ || ! strncmp (token, "reinterpret_cast", len)
+ || ! strncmp (token, "const_cast", len));
+}
+
+/* The scope used for macro expansion. */
+static struct macro_scope *expression_macro_scope;
+
+/* This is set if a NAME token appeared at the very end of the input
+ string, with no whitespace separating the name from the EOF. This
+ is used only when parsing to do field name completion. */
+static int saw_name_at_eof;
+
+/* This is set if the previously-returned token was a structure
+ operator -- either '.' or ARROW. This is used only when parsing to
+ do field name completion. */
+static int last_was_structop;
+
/* Read one token, getting characters through lexptr. */
-int
-yylex ()
+static int
+lex_one_token (void)
{
int c;
int namelen;
unsigned int i;
char *tokstart;
- char *tokptr;
- int tempbufindex;
- static char *tempbuf;
- static int tempbufsize;
-
+ int saw_structop = last_was_structop;
+ char *copy;
+
+ last_was_structop = 0;
+
retry:
+ /* Check if this is a macro invocation that we need to expand. */
+ if (! scanning_macro_expansion ())
+ {
+ char *expanded = macro_expand_next (&lexptr,
+ standard_macro_lookup,
+ expression_macro_scope);
+
+ if (expanded)
+ scan_macro_expansion (expanded);
+ }
+
+ prev_lexptr = lexptr;
+
tokstart = lexptr;
/* See if it is a special token of length 3. */
for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
- if (!strncmp (tokstart, tokentab3[i].operator, 3))
+ if (strncmp (tokstart, tokentab3[i].operator, 3) == 0)
{
+ if (tokentab3[i].cxx_only
+ && parse_language->la_language != language_cplus)
+ break;
+
lexptr += 3;
yylval.opcode = tokentab3[i].opcode;
return tokentab3[i].token;
/* See if it is a special token of length 2. */
for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
- if (!strncmp (tokstart, tokentab2[i].operator, 2))
+ if (strncmp (tokstart, tokentab2[i].operator, 2) == 0)
{
+ if (tokentab2[i].cxx_only
+ && parse_language->la_language != language_cplus)
+ break;
+
lexptr += 2;
yylval.opcode = tokentab2[i].opcode;
+ if (in_parse_field && tokentab2[i].token == ARROW)
+ last_was_structop = 1;
return tokentab2[i].token;
}
switch (c = *tokstart)
{
case 0:
- return 0;
+ /* If we were just scanning the result of a macro expansion,
+ then we need to resume scanning the original text.
+ If we're parsing for field name completion, and the previous
+ token allows such completion, return a COMPLETE token.
+ Otherwise, we were already scanning the original text, and
+ we're really done. */
+ if (scanning_macro_expansion ())
+ {
+ finished_macro_expansion ();
+ goto retry;
+ }
+ else if (saw_name_at_eof)
+ {
+ saw_name_at_eof = 0;
+ return COMPLETE;
+ }
+ else if (saw_structop)
+ return COMPLETE;
+ else
+ return 0;
case ' ':
case '\t':
lexptr++;
goto retry;
- case '\'':
- /* We either have a character constant ('0' or '\177' for example)
- or we have a quoted symbol reference ('foo(int,int)' in C++
- for example). */
- lexptr++;
- c = *lexptr++;
- if (c == '\\')
- c = parse_escape (&lexptr);
-
- yylval.typed_val.val = c;
- yylval.typed_val.type = builtin_type_char;
-
- c = *lexptr++;
- if (c != '\'')
- {
- namelen = skip_quoted (tokstart) - tokstart;
- if (namelen > 2)
- {
- lexptr = tokstart + namelen;
- namelen -= 2;
- tokstart++;
- goto tryname;
- }
- error ("Invalid character constant.");
- }
- return INT;
-
+ case '[':
case '(':
paren_depth++;
lexptr++;
return c;
+ case ']':
case ')':
if (paren_depth == 0)
return 0;
return c;
case ',':
- if (comma_terminates && paren_depth == 0)
+ if (comma_terminates
+ && paren_depth == 0
+ && ! scanning_macro_expansion ())
return 0;
lexptr++;
return c;
case '.':
/* Might be a floating point number. */
if (lexptr[1] < '0' || lexptr[1] > '9')
- goto symbol; /* Nope, must be a symbol. */
+ {
+ if (in_parse_field)
+ last_was_structop = 1;
+ goto symbol; /* Nope, must be a symbol. */
+ }
/* FALL THRU into number case. */
case '0':
{
/* It's a number. */
int got_dot = 0, got_e = 0, toktype;
- register char *p = tokstart;
+ char *p = tokstart;
int hex = input_radix > 10;
if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
for (;; ++p)
{
+ /* This test includes !hex because 'e' is a valid hex digit
+ and thus does not indicate a floating point number when
+ the radix is hex. */
if (!hex && !got_e && (*p == 'e' || *p == 'E'))
got_dot = got_e = 1;
- else if (!hex && !got_dot && *p == '.')
+ /* This test does not include !hex, because a '.' always indicates
+ a decimal floating point number regardless of the radix. */
+ else if (!got_dot && *p == '.')
got_dot = 1;
else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
&& (*p == '-' || *p == '+'))
case '@':
case '<':
case '>':
- case '[':
- case ']':
case '?':
case ':':
case '=':
lexptr++;
return c;
+ case 'L':
+ case 'u':
+ case 'U':
+ if (tokstart[1] != '"' && tokstart[1] != '\'')
+ break;
+ /* Fall through. */
+ case '\'':
case '"':
-
- /* Build the gdb internal form of the input string in tempbuf,
- translating any standard C escape forms seen. Note that the
- buffer is null byte terminated *only* for the convenience of
- debugging gdb itself and printing the buffer contents when
- the buffer contains no embedded nulls. Gdb does not depend
- upon the buffer being null byte terminated, it uses the length
- string instead. This allows gdb to handle C strings (as well
- as strings in other languages) with embedded null bytes */
-
- tokptr = ++tokstart;
- tempbufindex = 0;
-
- do {
- /* Grow the static temp buffer if necessary, including allocating
- the first one on demand. */
- if (tempbufindex + 1 >= tempbufsize)
- {
- tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
- }
- switch (*tokptr)
+ {
+ int host_len;
+ int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
+ &host_len);
+ if (result == CHAR)
{
- case '\0':
- case '"':
- /* Do nothing, loop will terminate. */
- break;
- case '\\':
- tokptr++;
- c = parse_escape (&tokptr);
- if (c == -1)
+ if (host_len == 0)
+ error ("Empty character constant.");
+ else if (host_len > 2 && c == '\'')
{
- continue;
+ ++tokstart;
+ namelen = lexptr - tokstart - 1;
+ goto tryname;
}
- tempbuf[tempbufindex++] = c;
- break;
- default:
- tempbuf[tempbufindex++] = *tokptr++;
- break;
+ else if (host_len > 1)
+ error ("Invalid character constant.");
}
- } while ((*tokptr != '"') && (*tokptr != '\0'));
- if (*tokptr++ != '"')
- {
- error ("Unterminated string in expression.");
- }
- tempbuf[tempbufindex] = '\0'; /* See note above */
- yylval.sval.ptr = tempbuf;
- yylval.sval.length = tempbufindex;
- lexptr = tokptr;
- return (STRING);
+ return result;
+ }
}
if (!(c == '_' || c == '$'
namelen = 0;
for (c = tokstart[namelen];
(c == '_' || c == '$' || (c >= '0' && c <= '9')
- || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
- c = tokstart[++namelen])
- ;
+ || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
+ {
+ /* Template parameter lists are part of the name.
+ FIXME: This mishandles `print $a<4&&$a>3'. */
- /* The token "if" terminates the expression and is NOT
- removed from the input stream. */
- if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
+ if (c == '<')
+ {
+ if (! is_cast_operator (tokstart, namelen))
+ {
+ /* Scan ahead to get rest of the template specification. Note
+ that we look ahead only when the '<' adjoins non-whitespace
+ characters; for comparison expressions, e.g. "a < b > c",
+ there must be spaces before the '<', etc. */
+
+ char * p = find_template_name_end (tokstart + namelen);
+ if (p)
+ namelen = p - tokstart;
+ }
+ break;
+ }
+ c = tokstart[++namelen];
+ }
+
+ /* The token "if" terminates the expression and is NOT removed from
+ the input stream. It doesn't count if it appears in the
+ expansion of a macro. */
+ if (namelen == 2
+ && tokstart[0] == 'i'
+ && tokstart[1] == 'f'
+ && ! scanning_macro_expansion ())
{
return 0;
}
- lexptr += namelen;
+ /* For the same reason (breakpoint conditions), "thread N"
+ terminates the expression. "thread" could be an identifier, but
+ an identifier is never followed by a number without intervening
+ punctuation. "task" is similar. Handle abbreviations of these,
+ similarly to breakpoint.c:find_condition_and_thread. */
+ if (namelen >= 1
+ && (strncmp (tokstart, "thread", namelen) == 0
+ || strncmp (tokstart, "task", namelen) == 0)
+ && (tokstart[namelen] == ' ' || tokstart[namelen] == '\t')
+ && ! scanning_macro_expansion ())
+ {
+ char *p = tokstart + namelen + 1;
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p >= '0' && *p <= '9')
+ return 0;
+ }
- /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
- and $$digits (equivalent to $<-digits> if you could type that).
- Make token type LAST, and put the number (the digits) in yylval. */
+ lexptr += namelen;
tryname:
+
+ yylval.sval.ptr = tokstart;
+ yylval.sval.length = namelen;
+
+ /* Catch specific keywords. */
+ copy = copy_name (yylval.sval);
+ for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
+ if (strcmp (copy, ident_tokens[i].operator) == 0)
+ {
+ if (ident_tokens[i].cxx_only
+ && parse_language->la_language != language_cplus)
+ break;
+
+ /* It is ok to always set this, even though we don't always
+ strictly need to. */
+ yylval.opcode = ident_tokens[i].opcode;
+ return ident_tokens[i].token;
+ }
+
if (*tokstart == '$')
+ return VARIABLE;
+
+ if (in_parse_field && *lexptr == '\0')
+ saw_name_at_eof = 1;
+ return NAME;
+}
+
+/* An object of this type is pushed on a FIFO by the "outer" lexer. */
+typedef struct
+{
+ int token;
+ YYSTYPE value;
+} token_and_value;
+
+DEF_VEC_O (token_and_value);
+
+/* A FIFO of tokens that have been read but not yet returned to the
+ parser. */
+static VEC (token_and_value) *token_fifo;
+
+/* Non-zero if the lexer should return tokens from the FIFO. */
+static int popping;
+
+/* Temporary storage for c_lex; this holds symbol names as they are
+ built up. */
+static struct obstack name_obstack;
+
+/* Classify a NAME token. The contents of the token are in `yylval'.
+ Updates yylval and returns the new token type. BLOCK is the block
+ in which lookups start; this can be NULL to mean the global
+ scope. */
+static int
+classify_name (struct block *block)
+{
+ struct symbol *sym;
+ char *copy;
+ int is_a_field_of_this = 0;
+
+ copy = copy_name (yylval.sval);
+
+ sym = lookup_symbol (copy, block, VAR_DOMAIN,
+ parse_language->la_language == language_cplus
+ ? &is_a_field_of_this : (int *) NULL);
+
+ if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
{
- register int negate = 0;
- c = 1;
- /* Double dollar means negate the number and add -1 as well.
- Thus $$ alone means -1. */
- if (namelen >= 2 && tokstart[1] == '$')
- {
- negate = 1;
- c = 2;
- }
- if (c == namelen)
- {
- /* Just dollars (one or two) */
- yylval.lval = - negate;
- return LAST;
- }
- /* Is the rest of the token digits? */
- for (; c < namelen; c++)
- if (!(tokstart[c] >= '0' && tokstart[c] <= '9'))
- break;
- if (c == namelen)
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return BLOCKNAME;
+ }
+ else if (!sym)
+ {
+ /* See if it's a file name. */
+ struct symtab *symtab;
+
+ symtab = lookup_symtab (copy);
+ if (symtab)
{
- yylval.lval = atoi (tokstart + 1 + negate);
- if (negate)
- yylval.lval = - yylval.lval;
- return LAST;
+ yylval.bval = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
+ return FILENAME;
}
}
- /* Handle tokens that refer to machine registers:
- $ followed by a register name. */
+ if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
+ {
+ yylval.tsym.type = SYMBOL_TYPE (sym);
+ return TYPENAME;
+ }
- if (*tokstart == '$') {
- for (c = 0; c < NUM_REGS; c++)
- if (namelen - 1 == strlen (reg_names[c])
- && !strncmp (tokstart + 1, reg_names[c], namelen - 1))
+ yylval.tsym.type
+ = language_lookup_primitive_type_by_name (parse_language,
+ parse_gdbarch, copy);
+ if (yylval.tsym.type != NULL)
+ return TYPENAME;
+
+ /* Input names that aren't symbols but ARE valid hex numbers, when
+ the input radix permits them, can be names or numbers depending
+ on the parse. Note we support radixes > 16 here. */
+ if (!sym
+ && ((copy[0] >= 'a' && copy[0] < 'a' + input_radix - 10)
+ || (copy[0] >= 'A' && copy[0] < 'A' + input_radix - 10)))
+ {
+ YYSTYPE newlval; /* Its value is ignored. */
+ int hextype = parse_number (copy, yylval.sval.length, 0, &newlval);
+ if (hextype == INT)
{
- yylval.lval = c;
- return REGNAME;
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME_OR_INT;
}
- for (c = 0; c < num_std_regs; c++)
- if (namelen - 1 == strlen (std_regs[c].name)
- && !strncmp (tokstart + 1, std_regs[c].name, namelen - 1))
- {
- yylval.lval = std_regs[c].regnum;
- return REGNAME;
- }
- }
- /* Catch specific keywords. Should be done with a data structure. */
- switch (namelen)
+ }
+
+ /* Any other kind of symbol */
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME;
+}
+
+/* Like classify_name, but used by the inner loop of the lexer, when a
+ name might have already been seen. FIRST_NAME is true if the token
+ in `yylval' is the first component of a name, false otherwise. If
+ this function returns NAME, it might not have updated `yylval'.
+ This is ok because the caller only cares about TYPENAME. */
+static int
+classify_inner_name (struct block *block, int first_name)
+{
+ struct type *type, *new_type;
+ char *copy;
+
+ if (first_name)
+ return classify_name (block);
+
+ type = check_typedef (yylval.tsym.type);
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT
+ && TYPE_CODE (type) != TYPE_CODE_UNION
+ && TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
+ /* We know the caller won't expect us to update yylval. */
+ return NAME;
+
+ copy = copy_name (yylval.tsym.stoken);
+ new_type = cp_lookup_nested_type (type, copy, block);
+
+ if (new_type == NULL)
+ /* We know the caller won't expect us to update yylval. */
+ return NAME;
+
+ yylval.tsym.type = new_type;
+ return TYPENAME;
+}
+
+/* The outer level of a two-level lexer. This calls the inner lexer
+ to return tokens. It then either returns these tokens, or
+ aggregates them into a larger token. This lets us work around a
+ problem in our parsing approach, where the parser could not
+ distinguish between qualified names and qualified types at the
+ right point.
+
+ This approach is still not ideal, because it mishandles template
+ types. See the comment in lex_one_token for an example. However,
+ this is still an improvement over the earlier approach, and will
+ suffice until we move to better parsing technology. */
+static int
+yylex (void)
+{
+ token_and_value current;
+ char *name;
+ int first_was_coloncolon, last_was_coloncolon, first_iter;
+
+ if (popping && !VEC_empty (token_and_value, token_fifo))
{
- case 8:
- if (!strncmp (tokstart, "unsigned", 8))
- return UNSIGNED;
- if (current_language->la_language == language_cplus
- && !strncmp (tokstart, "template", 8))
- return TEMPLATE;
- if (!strncmp (tokstart, "volatile", 8))
- return VOLATILE_KEYWORD;
- break;
- case 6:
- if (!strncmp (tokstart, "struct", 6))
- return STRUCT;
- if (!strncmp (tokstart, "signed", 6))
- return SIGNED_KEYWORD;
- if (!strncmp (tokstart, "sizeof", 6))
- return SIZEOF;
- break;
- case 5:
- if (current_language->la_language == language_cplus
- && !strncmp (tokstart, "class", 5))
- return CLASS;
- if (!strncmp (tokstart, "union", 5))
- return UNION;
- if (!strncmp (tokstart, "short", 5))
- return SHORT;
- if (!strncmp (tokstart, "const", 5))
- return CONST_KEYWORD;
- break;
- case 4:
- if (!strncmp (tokstart, "enum", 4))
- return ENUM;
- if (!strncmp (tokstart, "long", 4))
- return LONG;
- if (current_language->la_language == language_cplus
- && !strncmp (tokstart, "this", 4))
+ token_and_value tv = *VEC_index (token_and_value, token_fifo, 0);
+ VEC_ordered_remove (token_and_value, token_fifo, 0);
+ yylval = tv.value;
+ return tv.token;
+ }
+ popping = 0;
+
+ current.token = lex_one_token ();
+ if (current.token == NAME)
+ current.token = classify_name (expression_context_block);
+ if (parse_language->la_language != language_cplus
+ || (current.token != TYPENAME && current.token != COLONCOLON))
+ return current.token;
+
+ first_was_coloncolon = current.token == COLONCOLON;
+ last_was_coloncolon = first_was_coloncolon;
+ obstack_free (&name_obstack, obstack_base (&name_obstack));
+ if (!last_was_coloncolon)
+ obstack_grow (&name_obstack, yylval.sval.ptr, yylval.sval.length);
+ current.value = yylval;
+ first_iter = 1;
+ while (1)
+ {
+ token_and_value next;
+
+ next.token = lex_one_token ();
+ next.value = yylval;
+
+ if (next.token == NAME && last_was_coloncolon)
{
- static const char this_name[] =
- { CPLUS_MARKER, 't', 'h', 'i', 's', '\0' };
+ int classification;
+
+ classification = classify_inner_name (first_was_coloncolon
+ ? NULL
+ : expression_context_block,
+ first_iter);
+ /* We keep going until we either run out of names, or until
+ we have a qualified name which is not a type. */
+ if (classification != TYPENAME)
+ {
+ /* Push the final component and leave the loop. */
+ VEC_safe_push (token_and_value, token_fifo, &next);
+ break;
+ }
- if (lookup_symbol (this_name, expression_context_block,
- VAR_NAMESPACE, 0, NULL))
- return THIS;
+ /* Update the partial name we are constructing. */
+ if (!first_iter)
+ {
+ /* We don't want to put a leading "::" into the name. */
+ obstack_grow_str (&name_obstack, "::");
+ }
+ obstack_grow (&name_obstack, next.value.sval.ptr,
+ next.value.sval.length);
+
+ yylval.sval.ptr = obstack_base (&name_obstack);
+ yylval.sval.length = obstack_object_size (&name_obstack);
+ current.value = yylval;
+ current.token = classification;
+
+ last_was_coloncolon = 0;
+ }
+ else if (next.token == COLONCOLON && !last_was_coloncolon)
+ last_was_coloncolon = 1;
+ else
+ {
+ /* We've reached the end of the name. */
+ VEC_safe_push (token_and_value, token_fifo, &next);
+ break;
}
- break;
- case 3:
- if (!strncmp (tokstart, "int", 3))
- return INT_KEYWORD;
- break;
- default:
- break;
- }
- yylval.sval.ptr = tokstart;
- yylval.sval.length = namelen;
+ first_iter = 0;
+ }
- /* Any other names starting in $ are debugger internal variables. */
+ popping = 1;
- if (*tokstart == '$')
+ /* If we ended with a "::", insert it too. */
+ if (last_was_coloncolon)
{
- yylval.ivar = lookup_internalvar (copy_name (yylval.sval) + 1);
- return VARIABLE;
+ token_and_value cc;
+ memset (&cc, 0, sizeof (token_and_value));
+ if (first_was_coloncolon)
+ {
+ yylval = cc.value;
+ return COLONCOLON;
+ }
+ cc.token = COLONCOLON;
+ VEC_safe_insert (token_and_value, token_fifo, 0, &cc);
}
- /* Use token-type BLOCKNAME for symbols that happen to be defined as
- functions or symtabs. If this is not so, then ...
- Use token-type TYPENAME for symbols that happen to be defined
- currently as names of types; NAME for other symbols.
- The caller is not constrained to care about the distinction. */
- {
- char *tmp = copy_name (yylval.sval);
- struct symbol *sym;
- int is_a_field_of_this = 0;
- int hextype;
-
- sym = lookup_symbol (tmp, expression_context_block,
- VAR_NAMESPACE,
- current_language->la_language == language_cplus
- ? &is_a_field_of_this : NULL,
- NULL);
- if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) ||
- lookup_partial_symtab (tmp))
- {
- yylval.ssym.sym = sym;
- yylval.ssym.is_a_field_of_this = is_a_field_of_this;
- return BLOCKNAME;
- }
- if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
- {
- yylval.tsym.type = SYMBOL_TYPE (sym);
- return TYPENAME;
- }
- if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
- return TYPENAME;
-
- /* Input names that aren't symbols but ARE valid hex numbers,
- when the input radix permits them, can be names or numbers
- depending on the parse. Note we support radixes > 16 here. */
- if (!sym &&
- ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) ||
- (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
- {
- YYSTYPE newlval; /* Its value is ignored. */
- hextype = parse_number (tokstart, namelen, 0, &newlval);
- if (hextype == INT)
- {
- yylval.ssym.sym = sym;
- yylval.ssym.is_a_field_of_this = is_a_field_of_this;
- return NAME_OR_INT;
- }
- }
+ yylval = current.value;
+ yylval.sval.ptr = obstack_copy0 (&expansion_obstack,
+ yylval.sval.ptr,
+ yylval.sval.length);
+ return current.token;
+}
- /* Any other kind of symbol */
- yylval.ssym.sym = sym;
- yylval.ssym.is_a_field_of_this = is_a_field_of_this;
- return NAME;
- }
+int
+c_parse (void)
+{
+ int result;
+ struct cleanup *back_to = make_cleanup (free_current_contents,
+ &expression_macro_scope);
+
+ /* Set up the scope for macro expansion. */
+ expression_macro_scope = NULL;
+
+ if (expression_context_block)
+ expression_macro_scope
+ = sal_macro_scope (find_pc_line (expression_context_pc, 0));
+ else
+ expression_macro_scope = default_macro_scope ();
+ if (! expression_macro_scope)
+ expression_macro_scope = user_macro_scope ();
+
+ /* Initialize macro expansion code. */
+ obstack_init (&expansion_obstack);
+ gdb_assert (! macro_original_text);
+ make_cleanup (scan_macro_cleanup, 0);
+
+ make_cleanup_restore_integer (&yydebug);
+ yydebug = parser_debug;
+
+ /* Initialize some state used by the lexer. */
+ last_was_structop = 0;
+ saw_name_at_eof = 0;
+
+ VEC_free (token_and_value, token_fifo);
+ popping = 0;
+ obstack_init (&name_obstack);
+ make_cleanup_obstack_free (&name_obstack);
+
+ result = yyparse ();
+ do_cleanups (back_to);
+ return result;
}
+
void
-yyerror (msg)
- char *msg;
+yyerror (char *msg)
{
- error (msg ? msg : "Invalid syntax in expression.");
+ if (prev_lexptr)
+ lexptr = prev_lexptr;
+
+ error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);
}
projects / deliverable / binutils-gdb.git / blobdiff