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p-exp.y
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/* YACC parser for Pascal expressions, for GDB.
Copyright (C) 2000-2015 Free Software Foundation, Inc.
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 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This file is derived from c-exp.y */
/* Parse a Pascal expression from text in a string,
and return the result as a struct expression pointer.
That structure contains arithmetic operations in reverse polish,
with constants represented by operations that are followed by special data.
See expression.h for the details of the format.
What is important here is that it can be built up sequentially
during the process of parsing; the lower levels of the tree always
come first in the result.
Note that malloc's and realloc's in this file are transformed to
xmalloc and xrealloc respectively by the same sed command in the
makefile that remaps any other malloc/realloc inserted by the parser
generator. Doing this with #defines and trying to control the interaction
with include files (<malloc.h> and <stdlib.h> for example) just became
too messy, particularly when such includes can be inserted at random
times by the parser generator. */
/* Known bugs or limitations:
- pascal string operations are not supported at all.
- there are some problems with boolean types.
- Pascal type hexadecimal constants are not supported
because they conflict with the internal variables format.
Probably also lots of other problems, less well defined PM. */
%{
#include "defs.h"
#include <ctype.h>
#include "expression.h"
#include "value.h"
#include "parser-defs.h"
#include "language.h"
#include "p-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 "block.h"
#include "completer.h"
#define parse_type(ps) builtin_type (parse_gdbarch (ps))
/* 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. */
#define yymaxdepth pascal_maxdepth
#define yyparse pascal_parse_internal
#define yylex pascal_lex
#define yyerror pascal_error
#define yylval pascal_lval
#define yychar pascal_char
#define yydebug pascal_debug
#define yypact pascal_pact
#define yyr1 pascal_r1
#define yyr2 pascal_r2
#define yydef pascal_def
#define yychk pascal_chk
#define yypgo pascal_pgo
#define yyact pascal_act
#define yyexca pascal_exca
#define yyerrflag pascal_errflag
#define yynerrs pascal_nerrs
#define yyps pascal_ps
#define yypv pascal_pv
#define yys pascal_s
#define yy_yys pascal_yys
#define yystate pascal_state
#define yytmp pascal_tmp
#define yyv pascal_v
#define yy_yyv pascal_yyv
#define yyval pascal_val
#define yylloc pascal_lloc
#define yyreds pascal_reds /* With YYDEBUG defined */
#define yytoks pascal_toks /* With YYDEBUG defined */
#define yyname pascal_name /* With YYDEBUG defined */
#define yyrule pascal_rule /* With YYDEBUG defined */
#define yylhs pascal_yylhs
#define yylen pascal_yylen
#define yydefred pascal_yydefred
#define yydgoto pascal_yydgoto
#define yysindex pascal_yysindex
#define yyrindex pascal_yyrindex
#define yygindex pascal_yygindex
#define yytable pascal_yytable
#define yycheck pascal_yycheck
#define yyss pascal_yyss
#define yysslim pascal_yysslim
#define yyssp pascal_yyssp
#define yystacksize pascal_yystacksize
#define yyvs pascal_yyvs
#define yyvsp pascal_yyvsp
#ifndef YYDEBUG
#define YYDEBUG 1 /* Default to yydebug support */
#endif
#define YYFPRINTF parser_fprintf
/* The state of the parser, used internally when we are parsing the
expression. */
static struct parser_state *pstate = NULL;
int yyparse (void);
static int yylex (void);
void yyerror (char *);
static char *uptok (const char *, int);
%}
/* Although the yacc "value" of an expression is not used,
since the result is stored in the structure being created,
other node types do have values. */
%union
{
LONGEST lval;
struct {
LONGEST val;
struct type *type;
} typed_val_int;
struct {
DOUBLEST dval;
struct type *type;
} typed_val_float;
struct symbol *sym;
struct type *tval;
struct stoken sval;
struct ttype tsym;
struct symtoken ssym;
int voidval;
const struct block *bval;
enum exp_opcode opcode;
struct internalvar *ivar;
struct type **tvec;
int *ivec;
}
%{
/* YYSTYPE gets defined by %union */
static int parse_number (struct parser_state *,
const char *, int, int, YYSTYPE *);
static struct type *current_type;
static struct internalvar *intvar;
static int leftdiv_is_integer;
static void push_current_type (void);
static void pop_current_type (void);
static int search_field;
%}
%type <voidval> exp exp1 type_exp start normal_start variable qualified_name
%type <tval> type typebase
/* %type <bval> block */
/* Fancy type parsing. */
%type <tval> ptype
%token <typed_val_int> INT
%token <typed_val_float> FLOAT
/* Both NAME and TYPENAME tokens represent symbols in the input,
and both convey their data as strings.
But a TYPENAME is a string that happens to be defined as a typedef
or builtin type name (such as int or char)
and a NAME is any other symbol.
Contexts where this distinction is not important can use the
nonterminal "name", which matches either NAME or TYPENAME. */
%token <sval> STRING
%token <sval> FIELDNAME
%token <voidval> COMPLETE
%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
%token <tsym> TYPENAME
%type <sval> name
%type <ssym> name_not_typename
/* A NAME_OR_INT is a symbol which is not known in the symbol table,
but which would parse as a valid number in the current input radix.
E.g. "c" when input_radix==16. Depending on the parse, it will be
turned into a name or into a number. */
%token <ssym> NAME_OR_INT
%token STRUCT CLASS SIZEOF COLONCOLON
%token ERROR
/* Special type cases, put in to allow the parser to distinguish different
legal basetypes. */
%token <voidval> VARIABLE
/* Object pascal */
%token THIS
%token <lval> TRUEKEYWORD FALSEKEYWORD
%left ','
%left ABOVE_COMMA
%right ASSIGN
%left NOT
%left OR
%left XOR
%left ANDAND
%left '=' NOTEQUAL
%left '<' '>' LEQ GEQ
%left LSH RSH DIV MOD
%left '@'
%left '+' '-'
%left '*' '/'
%right UNARY INCREMENT DECREMENT
%right ARROW '.' '[' '('
%left '^'
%token <ssym> BLOCKNAME
%type <bval> block
%left COLONCOLON
%%
start : { current_type = NULL;
intvar = NULL;
search_field = 0;
leftdiv_is_integer = 0;
}
normal_start {}
;
normal_start :
exp1
| type_exp
;
type_exp: type
{ write_exp_elt_opcode (pstate, OP_TYPE);
write_exp_elt_type (pstate, $1);
write_exp_elt_opcode (pstate, OP_TYPE);
current_type = $1; } ;
/* Expressions, including the comma operator. */
exp1 : exp
| exp1 ',' exp
{ write_exp_elt_opcode (pstate, BINOP_COMMA); }
;
/* Expressions, not including the comma operator. */
exp : exp '^' %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_IND);
if (current_type)
current_type = TYPE_TARGET_TYPE (current_type); }
;
exp : '@' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_ADDR);
if (current_type)
current_type = TYPE_POINTER_TYPE (current_type); }
;
exp : '-' exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_NEG); }
;
exp : NOT exp %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
;
exp : INCREMENT '(' exp ')' %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
;
exp : DECREMENT '(' exp ')' %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
;
field_exp : exp '.' %prec UNARY
{ search_field = 1; }
;
exp : field_exp FIELDNAME
{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, $2);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
search_field = 0;
if (current_type)
{
while (TYPE_CODE (current_type)
== TYPE_CODE_PTR)
current_type =
TYPE_TARGET_TYPE (current_type);
current_type = lookup_struct_elt_type (
current_type, $2.ptr, 0);
}
}
;
exp : field_exp name
{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, $2);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
search_field = 0;
if (current_type)
{
while (TYPE_CODE (current_type)
== TYPE_CODE_PTR)
current_type =
TYPE_TARGET_TYPE (current_type);
current_type = lookup_struct_elt_type (
current_type, $2.ptr, 0);
}
}
;
exp : field_exp name COMPLETE
{ mark_struct_expression (pstate);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, $2);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
;
exp : field_exp COMPLETE
{ struct stoken s;
mark_struct_expression (pstate);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
s.ptr = "";
s.length = 0;
write_exp_string (pstate, s);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
;
exp : exp '['
/* We need to save the current_type value. */
{ const char *arrayname;
int arrayfieldindex;
arrayfieldindex = is_pascal_string_type (
current_type, NULL, NULL,
NULL, NULL, &arrayname);
if (arrayfieldindex)
{
struct stoken stringsval;
char *buf;
buf = alloca (strlen (arrayname) + 1);
stringsval.ptr = buf;
stringsval.length = strlen (arrayname);
strcpy (buf, arrayname);
current_type = TYPE_FIELD_TYPE (current_type,
arrayfieldindex - 1);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
write_exp_string (pstate, stringsval);
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
}
push_current_type (); }
exp1 ']'
{ pop_current_type ();
write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT);
if (current_type)
current_type = TYPE_TARGET_TYPE (current_type); }
;
exp : exp '('
/* This is to save the value of arglist_len
being accumulated by an outer function call. */
{ push_current_type ();
start_arglist (); }
arglist ')' %prec ARROW
{ write_exp_elt_opcode (pstate, OP_FUNCALL);
write_exp_elt_longcst (pstate,
(LONGEST) end_arglist ());
write_exp_elt_opcode (pstate, OP_FUNCALL);
pop_current_type ();
if (current_type)
current_type = TYPE_TARGET_TYPE (current_type);
}
;
arglist :
| exp
{ arglist_len = 1; }
| arglist ',' exp %prec ABOVE_COMMA
{ arglist_len++; }
;
exp : type '(' exp ')' %prec UNARY
{ if (current_type)
{
/* Allow automatic dereference of classes. */
if ((TYPE_CODE (current_type) == TYPE_CODE_PTR)
&& (TYPE_CODE (TYPE_TARGET_TYPE (current_type)) == TYPE_CODE_STRUCT)
&& (TYPE_CODE ($1) == TYPE_CODE_STRUCT))
write_exp_elt_opcode (pstate, UNOP_IND);
}
write_exp_elt_opcode (pstate, UNOP_CAST);
write_exp_elt_type (pstate, $1);
write_exp_elt_opcode (pstate, UNOP_CAST);
current_type = $1; }
;
exp : '(' exp1 ')'
{ }
;
/* Binary operators in order of decreasing precedence. */
exp : exp '*' exp
{ write_exp_elt_opcode (pstate, BINOP_MUL); }
;
exp : exp '/' {
if (current_type && is_integral_type (current_type))
leftdiv_is_integer = 1;
}
exp
{
if (leftdiv_is_integer && current_type
&& is_integral_type (current_type))
{
write_exp_elt_opcode (pstate, UNOP_CAST);
write_exp_elt_type (pstate,
parse_type (pstate)
->builtin_long_double);
current_type
= parse_type (pstate)->builtin_long_double;
write_exp_elt_opcode (pstate, UNOP_CAST);
leftdiv_is_integer = 0;
}
write_exp_elt_opcode (pstate, BINOP_DIV);
}
;
exp : exp DIV exp
{ write_exp_elt_opcode (pstate, BINOP_INTDIV); }
;
exp : exp MOD exp
{ write_exp_elt_opcode (pstate, BINOP_REM); }
;
exp : exp '+' exp
{ write_exp_elt_opcode (pstate, BINOP_ADD); }
;
exp : exp '-' exp
{ write_exp_elt_opcode (pstate, BINOP_SUB); }
;
exp : exp LSH exp
{ write_exp_elt_opcode (pstate, BINOP_LSH); }
;
exp : exp RSH exp
{ write_exp_elt_opcode (pstate, BINOP_RSH); }
;
exp : exp '=' exp
{ write_exp_elt_opcode (pstate, BINOP_EQUAL);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp NOTEQUAL exp
{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp LEQ exp
{ write_exp_elt_opcode (pstate, BINOP_LEQ);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp GEQ exp
{ write_exp_elt_opcode (pstate, BINOP_GEQ);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp '<' exp
{ write_exp_elt_opcode (pstate, BINOP_LESS);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp '>' exp
{ write_exp_elt_opcode (pstate, BINOP_GTR);
current_type = parse_type (pstate)->builtin_bool;
}
;
exp : exp ANDAND exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
;
exp : exp XOR exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
;
exp : exp OR exp
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
;
exp : exp ASSIGN exp
{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
;
exp : TRUEKEYWORD
{ write_exp_elt_opcode (pstate, OP_BOOL);
write_exp_elt_longcst (pstate, (LONGEST) $1);
current_type = parse_type (pstate)->builtin_bool;
write_exp_elt_opcode (pstate, OP_BOOL); }
;
exp : FALSEKEYWORD
{ write_exp_elt_opcode (pstate, OP_BOOL);
write_exp_elt_longcst (pstate, (LONGEST) $1);
current_type = parse_type (pstate)->builtin_bool;
write_exp_elt_opcode (pstate, OP_BOOL); }
;
exp : INT
{ write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate, $1.type);
current_type = $1.type;
write_exp_elt_longcst (pstate, (LONGEST)($1.val));
write_exp_elt_opcode (pstate, OP_LONG); }
;
exp : NAME_OR_INT
{ YYSTYPE val;
parse_number (pstate, $1.stoken.ptr,
$1.stoken.length, 0, &val);
write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate, val.typed_val_int.type);
current_type = val.typed_val_int.type;
write_exp_elt_longcst (pstate, (LONGEST)
val.typed_val_int.val);
write_exp_elt_opcode (pstate, OP_LONG);
}
;
exp : FLOAT
{ write_exp_elt_opcode (pstate, OP_DOUBLE);
write_exp_elt_type (pstate, $1.type);
current_type = $1.type;
write_exp_elt_dblcst (pstate, $1.dval);
write_exp_elt_opcode (pstate, OP_DOUBLE); }
;
exp : variable
;
exp : VARIABLE
/* Already written by write_dollar_variable.
Handle current_type. */
{ if (intvar) {
struct value * val, * mark;
mark = value_mark ();
val = value_of_internalvar (parse_gdbarch (pstate),
intvar);
current_type = value_type (val);
value_release_to_mark (mark);
}
}
;
exp : SIZEOF '(' type ')' %prec UNARY
{ write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate,
parse_type (pstate)->builtin_int);
current_type = parse_type (pstate)->builtin_int;
$3 = check_typedef ($3);
write_exp_elt_longcst (pstate,
(LONGEST) TYPE_LENGTH ($3));
write_exp_elt_opcode (pstate, OP_LONG); }
;
exp : SIZEOF '(' exp ')' %prec UNARY
{ write_exp_elt_opcode (pstate, UNOP_SIZEOF);
current_type = parse_type (pstate)->builtin_int; }
exp : STRING
{ /* C strings are converted into array constants with
an explicit null byte added at the end. Thus
the array upper bound is the string length.
There is no such thing in C as a completely empty
string. */
const char *sp = $1.ptr; int count = $1.length;
while (count-- > 0)
{
write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate,
parse_type (pstate)
->builtin_char);
write_exp_elt_longcst (pstate,
(LONGEST) (*sp++));
write_exp_elt_opcode (pstate, OP_LONG);
}
write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_type (pstate,
parse_type (pstate)
->builtin_char);
write_exp_elt_longcst (pstate, (LONGEST)'\0');
write_exp_elt_opcode (pstate, OP_LONG);
write_exp_elt_opcode (pstate, OP_ARRAY);
write_exp_elt_longcst (pstate, (LONGEST) 0);
write_exp_elt_longcst (pstate,
(LONGEST) ($1.length));
write_exp_elt_opcode (pstate, OP_ARRAY); }
;
/* Object pascal */
exp : THIS
{
struct value * this_val;
struct type * this_type;
write_exp_elt_opcode (pstate, OP_THIS);
write_exp_elt_opcode (pstate, OP_THIS);
/* We need type of this. */
this_val
= value_of_this_silent (parse_language (pstate));
if (this_val)
this_type = value_type (this_val);
else
this_type = NULL;
if (this_type)
{
if (TYPE_CODE (this_type) == TYPE_CODE_PTR)
{
this_type = TYPE_TARGET_TYPE (this_type);
write_exp_elt_opcode (pstate, UNOP_IND);
}
}
current_type = this_type;
}
;
/* end of object pascal. */
block : BLOCKNAME
{
if ($1.sym.symbol != 0)
$$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
else
{
struct symtab *tem =
lookup_symtab (copy_name ($1.stoken));
if (tem)
$$ = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (tem),
STATIC_BLOCK);
else
error (_("No file or function \"%s\"."),
copy_name ($1.stoken));
}
}
;
block : block COLONCOLON name
{ struct symbol *tem
= lookup_symbol (copy_name ($3), $1,
VAR_DOMAIN, NULL).symbol;
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
error (_("No function \"%s\" in specified context."),
copy_name ($3));
$$ = SYMBOL_BLOCK_VALUE (tem); }
;
variable: block COLONCOLON name
{ struct block_symbol sym;
sym = lookup_symbol (copy_name ($3), $1,
VAR_DOMAIN, NULL);
if (sym.symbol == 0)
error (_("No symbol \"%s\" in specified context."),
copy_name ($3));
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
write_exp_elt_block (pstate, sym.block);
write_exp_elt_sym (pstate, sym.symbol);
write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
;
qualified_name: typebase COLONCOLON name
{
struct type *type = $1;
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
&& TYPE_CODE (type) != TYPE_CODE_UNION)
error (_("`%s' is not defined as an aggregate type."),
TYPE_NAME (type));
write_exp_elt_opcode (pstate, OP_SCOPE);
write_exp_elt_type (pstate, type);
write_exp_string (pstate, $3);
write_exp_elt_opcode (pstate, OP_SCOPE);
}
;
variable: qualified_name
| COLONCOLON name
{
char *name = copy_name ($2);
struct symbol *sym;
struct bound_minimal_symbol msymbol;
sym =
lookup_symbol (name, (const struct block *) NULL,
VAR_DOMAIN, NULL).symbol;
if (sym)
{
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
write_exp_elt_block (pstate, NULL);
write_exp_elt_sym (pstate, sym);
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
break;
}
msymbol = lookup_bound_minimal_symbol (name);
if (msymbol.minsym != NULL)
write_exp_msymbol (pstate, msymbol);
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);
}
;
variable: name_not_typename
{ struct block_symbol sym = $1.sym;
if (sym.symbol)
{
if (symbol_read_needs_frame (sym.symbol))
{
if (innermost_block == 0
|| contained_in (sym.block,
innermost_block))
innermost_block = sym.block;
}
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
write_exp_elt_block (pstate, sym.block);
write_exp_elt_sym (pstate, sym.symbol);
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
current_type = sym.symbol->type; }
else if ($1.is_a_field_of_this)
{
struct value * this_val;
struct type * this_type;
/* Object pascal: it hangs off of `this'. Must
not inadvertently convert from a method call
to data ref. */
if (innermost_block == 0
|| contained_in (sym.block,
innermost_block))
innermost_block = sym.block;
write_exp_elt_opcode (pstate, OP_THIS);
write_exp_elt_opcode (pstate, OP_THIS);
write_exp_elt_opcode (pstate, STRUCTOP_PTR);
write_exp_string (pstate, $1.stoken);
write_exp_elt_opcode (pstate, STRUCTOP_PTR);
/* We need type of this. */
this_val
= value_of_this_silent (parse_language (pstate));
if (this_val)
this_type = value_type (this_val);
else
this_type = NULL;
if (this_type)
current_type = lookup_struct_elt_type (
this_type,
copy_name ($1.stoken), 0);
else
current_type = NULL;
}
else
{
struct bound_minimal_symbol msymbol;
char *arg = copy_name ($1.stoken);
msymbol =
lookup_bound_minimal_symbol (arg);
if (msymbol.minsym != NULL)
write_exp_msymbol (pstate, msymbol);
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."),
copy_name ($1.stoken));
}
}
;
ptype : typebase
;
/* We used to try to recognize more 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 /* Implements (approximately): (type-qualifier)* type-specifier */
: '^' typebase
{ $$ = lookup_pointer_type ($2); }
| TYPENAME
{ $$ = $1.type; }
| STRUCT name
{ $$ = lookup_struct (copy_name ($2),
expression_context_block); }
| CLASS name
{ $$ = lookup_struct (copy_name ($2),
expression_context_block); }
/* "const" and "volatile" are curently ignored. A type qualifier
after the type is handled in the ptype rule. I think these could
be too. */
;
name : NAME { $$ = $1.stoken; }
| BLOCKNAME { $$ = $1.stoken; }
| TYPENAME { $$ = $1.stoken; }
| NAME_OR_INT { $$ = $1.stoken; }
;
name_not_typename : NAME
| BLOCKNAME
/* These would be useful if name_not_typename was useful, but it is just
a fake for "variable", so these cause reduce/reduce conflicts because
the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
=exp) or just an exp. If name_not_typename was ever used in an lvalue
context where only a name could occur, this might be useful.
| NAME_OR_INT
*/
;
%%
/* 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 (struct parser_state *par_state,
const char *p, int len, int parsed_float, YYSTYPE *putithere)
{
/* 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;
/* 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)
{
if (! parse_c_float (parse_gdbarch (par_state), p, len,
&putithere->typed_val_float.dval,
&putithere->typed_val_float.type))
return ERROR;
return FLOAT;
}
/* Handle base-switching prefixes 0x, 0t, 0d, 0. */
if (p[0] == '0')
switch (p[1])
{
case 'x':
case 'X':
if (len >= 3)
{
p += 2;
base = 16;
len -= 2;
}
break;
case 't':
case 'T':
case 'd':
case 'D':
if (len >= 3)
{
p += 2;
base = 10;
len -= 2;
}
break;
default:
base = 8;
break;
}
while (len-- > 0)
{
c = *p++;
if (c >= 'A' && c <= 'Z')
c += 'a' - 'A';
if (c != 'l' && c != 'u')
n *= base;
if (c >= '0' && c <= '9')
{
if (found_suffix)
return ERROR;
n += i = c - '0';
}
else
{
if (base > 10 && c >= 'a' && c <= 'f')
{
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 */
}
if (i >= base)
return ERROR; /* Invalid digit in this base. */
/* Portably test for overflow (only works for nonzero values, so make
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."));
}