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1579 lines
40 KiB
Plaintext
1579 lines
40 KiB
Plaintext
/* YACC parser for C expressions, for GDB.
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Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Parse a C expression from text in a string,
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and return the result as a struct expression pointer.
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That structure contains arithmetic operations in reverse polish,
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with constants represented by operations that are followed by special data.
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See expression.h for the details of the format.
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What is important here is that it can be built up sequentially
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during the process of parsing; the lower levels of the tree always
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come first in the result.
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Note that malloc's and realloc's in this file are transformed to
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xmalloc and xrealloc respectively by the same sed command in the
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makefile that remaps any other malloc/realloc inserted by the parser
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generator. Doing this with #defines and trying to control the interaction
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with include files (<malloc.h> and <stdlib.h> for example) just became
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too messy, particularly when such includes can be inserted at random
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times by the parser generator. */
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%{
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#include "defs.h"
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#include "expression.h"
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#include "value.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "c-lang.h"
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#include "bfd.h" /* Required by objfiles.h. */
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#include "symfile.h" /* Required by objfiles.h. */
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#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
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/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
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as well as gratuitiously global symbol names, so we can have multiple
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yacc generated parsers in gdb. Note that these are only the variables
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produced by yacc. If other parser generators (bison, byacc, etc) produce
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additional global names that conflict at link time, then those parser
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generators need to be fixed instead of adding those names to this list. */
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#define yymaxdepth c_maxdepth
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#define yyparse c_parse
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#define yylex c_lex
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#define yyerror c_error
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#define yylval c_lval
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#define yychar c_char
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#define yydebug c_debug
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#define yypact c_pact
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#define yyr1 c_r1
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#define yyr2 c_r2
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#define yydef c_def
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#define yychk c_chk
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#define yypgo c_pgo
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#define yyact c_act
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#define yyexca c_exca
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#define yyerrflag c_errflag
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#define yynerrs c_nerrs
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#define yyps c_ps
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#define yypv c_pv
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#define yys c_s
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#define yy_yys c_yys
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#define yystate c_state
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#define yytmp c_tmp
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#define yyv c_v
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#define yy_yyv c_yyv
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#define yyval c_val
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#define yylloc c_lloc
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#define yyreds c_reds /* With YYDEBUG defined */
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#define yytoks c_toks /* With YYDEBUG defined */
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#ifndef YYDEBUG
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#define YYDEBUG 0 /* Default to no yydebug support */
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#endif
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int
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yyparse PARAMS ((void));
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static int
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yylex PARAMS ((void));
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void
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yyerror PARAMS ((char *));
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%}
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/* Although the yacc "value" of an expression is not used,
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since the result is stored in the structure being created,
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other node types do have values. */
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%union
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{
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LONGEST lval;
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struct {
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LONGEST val;
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struct type *type;
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} typed_val;
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double dval;
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struct symbol *sym;
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struct type *tval;
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struct stoken sval;
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struct ttype tsym;
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struct symtoken ssym;
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int voidval;
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struct block *bval;
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enum exp_opcode opcode;
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struct internalvar *ivar;
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struct type **tvec;
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int *ivec;
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}
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%{
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/* YYSTYPE gets defined by %union */
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static int
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parse_number PARAMS ((char *, int, int, YYSTYPE *));
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%}
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%type <voidval> exp exp1 type_exp start variable qualified_name lcurly
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%type <lval> rcurly
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%type <tval> type typebase
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%type <tvec> nonempty_typelist
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/* %type <bval> block */
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/* Fancy type parsing. */
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%type <voidval> func_mod direct_abs_decl abs_decl
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%type <tval> ptype
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%type <lval> array_mod
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%token <typed_val> INT
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%token <dval> FLOAT
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/* Both NAME and TYPENAME tokens represent symbols in the input,
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and both convey their data as strings.
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But a TYPENAME is a string that happens to be defined as a typedef
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or builtin type name (such as int or char)
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and a NAME is any other symbol.
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Contexts where this distinction is not important can use the
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nonterminal "name", which matches either NAME or TYPENAME. */
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%token <sval> STRING
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%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
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%token <tsym> TYPENAME
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%type <sval> name
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%type <ssym> name_not_typename
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%type <tsym> typename
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/* A NAME_OR_INT is a symbol which is not known in the symbol table,
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but which would parse as a valid number in the current input radix.
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E.g. "c" when input_radix==16. Depending on the parse, it will be
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turned into a name or into a number. */
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%token <ssym> NAME_OR_INT
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%token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
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%token TEMPLATE
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%token ERROR
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/* Special type cases, put in to allow the parser to distinguish different
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legal basetypes. */
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%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD
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%token <lval> LAST REGNAME
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%token <ivar> VARIABLE
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%token <opcode> ASSIGN_MODIFY
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/* C++ */
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%token THIS
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%left ','
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%left ABOVE_COMMA
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%right '=' ASSIGN_MODIFY
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%right '?'
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%left OROR
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%left ANDAND
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%left '|'
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%left '^'
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%left '&'
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%left EQUAL NOTEQUAL
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%left '<' '>' LEQ GEQ
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%left LSH RSH
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%left '@'
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%left '+' '-'
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%left '*' '/' '%'
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%right UNARY INCREMENT DECREMENT
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%right ARROW '.' '[' '('
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%token <ssym> BLOCKNAME
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%type <bval> block
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%left COLONCOLON
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%%
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start : exp1
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| type_exp
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;
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type_exp: type
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{ write_exp_elt_opcode(OP_TYPE);
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write_exp_elt_type($1);
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write_exp_elt_opcode(OP_TYPE);}
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;
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/* Expressions, including the comma operator. */
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exp1 : exp
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| exp1 ',' exp
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{ write_exp_elt_opcode (BINOP_COMMA); }
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;
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/* Expressions, not including the comma operator. */
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exp : '*' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_IND); }
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exp : '&' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_ADDR); }
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exp : '-' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_NEG); }
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;
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exp : '!' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
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;
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exp : '~' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_COMPLEMENT); }
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;
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exp : INCREMENT exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_PREINCREMENT); }
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;
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exp : DECREMENT exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_PREDECREMENT); }
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;
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exp : exp INCREMENT %prec UNARY
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{ write_exp_elt_opcode (UNOP_POSTINCREMENT); }
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;
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exp : exp DECREMENT %prec UNARY
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{ write_exp_elt_opcode (UNOP_POSTDECREMENT); }
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;
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exp : SIZEOF exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_SIZEOF); }
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;
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exp : exp ARROW name
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{ write_exp_elt_opcode (STRUCTOP_PTR);
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write_exp_string ($3);
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write_exp_elt_opcode (STRUCTOP_PTR); }
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;
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exp : exp ARROW qualified_name
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{ /* exp->type::name becomes exp->*(&type::name) */
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/* Note: this doesn't work if name is a
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static member! FIXME */
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write_exp_elt_opcode (UNOP_ADDR);
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write_exp_elt_opcode (STRUCTOP_MPTR); }
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;
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exp : exp ARROW '*' exp
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{ write_exp_elt_opcode (STRUCTOP_MPTR); }
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;
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exp : exp '.' name
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{ write_exp_elt_opcode (STRUCTOP_STRUCT);
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write_exp_string ($3);
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write_exp_elt_opcode (STRUCTOP_STRUCT); }
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;
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exp : exp '.' qualified_name
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{ /* exp.type::name becomes exp.*(&type::name) */
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/* Note: this doesn't work if name is a
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static member! FIXME */
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write_exp_elt_opcode (UNOP_ADDR);
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write_exp_elt_opcode (STRUCTOP_MEMBER); }
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;
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exp : exp '.' '*' exp
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{ write_exp_elt_opcode (STRUCTOP_MEMBER); }
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;
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exp : exp '[' exp1 ']'
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{ write_exp_elt_opcode (BINOP_SUBSCRIPT); }
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;
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exp : exp '('
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/* This is to save the value of arglist_len
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being accumulated by an outer function call. */
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{ start_arglist (); }
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arglist ')' %prec ARROW
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{ write_exp_elt_opcode (OP_FUNCALL);
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write_exp_elt_longcst ((LONGEST) end_arglist ());
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write_exp_elt_opcode (OP_FUNCALL); }
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;
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lcurly : '{'
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{ start_arglist (); }
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;
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arglist :
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;
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arglist : exp
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{ arglist_len = 1; }
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;
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arglist : arglist ',' exp %prec ABOVE_COMMA
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{ arglist_len++; }
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;
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rcurly : '}'
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{ $$ = end_arglist () - 1; }
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;
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exp : lcurly arglist rcurly %prec ARROW
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{ write_exp_elt_opcode (OP_ARRAY);
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write_exp_elt_longcst ((LONGEST) 0);
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write_exp_elt_longcst ((LONGEST) $3);
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write_exp_elt_opcode (OP_ARRAY); }
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;
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exp : lcurly type rcurly exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_MEMVAL);
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write_exp_elt_type ($2);
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write_exp_elt_opcode (UNOP_MEMVAL); }
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;
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exp : '(' type ')' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_CAST);
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write_exp_elt_type ($2);
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write_exp_elt_opcode (UNOP_CAST); }
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;
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exp : '(' exp1 ')'
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{ }
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;
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/* Binary operators in order of decreasing precedence. */
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exp : exp '@' exp
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{ write_exp_elt_opcode (BINOP_REPEAT); }
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;
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exp : exp '*' exp
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{ write_exp_elt_opcode (BINOP_MUL); }
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;
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exp : exp '/' exp
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{ write_exp_elt_opcode (BINOP_DIV); }
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;
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exp : exp '%' exp
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{ write_exp_elt_opcode (BINOP_REM); }
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;
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exp : exp '+' exp
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{ write_exp_elt_opcode (BINOP_ADD); }
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;
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exp : exp '-' exp
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{ write_exp_elt_opcode (BINOP_SUB); }
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;
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exp : exp LSH exp
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{ write_exp_elt_opcode (BINOP_LSH); }
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;
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exp : exp RSH exp
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{ write_exp_elt_opcode (BINOP_RSH); }
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;
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exp : exp EQUAL exp
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{ write_exp_elt_opcode (BINOP_EQUAL); }
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;
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exp : exp NOTEQUAL exp
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{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
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;
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exp : exp LEQ exp
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{ write_exp_elt_opcode (BINOP_LEQ); }
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;
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exp : exp GEQ exp
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{ write_exp_elt_opcode (BINOP_GEQ); }
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;
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exp : exp '<' exp
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{ write_exp_elt_opcode (BINOP_LESS); }
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;
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exp : exp '>' exp
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{ write_exp_elt_opcode (BINOP_GTR); }
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;
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exp : exp '&' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_AND); }
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;
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exp : exp '^' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_XOR); }
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;
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exp : exp '|' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_IOR); }
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;
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exp : exp ANDAND exp
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{ write_exp_elt_opcode (BINOP_LOGICAL_AND); }
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;
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exp : exp OROR exp
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{ write_exp_elt_opcode (BINOP_LOGICAL_OR); }
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;
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exp : exp '?' exp ':' exp %prec '?'
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{ write_exp_elt_opcode (TERNOP_COND); }
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;
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exp : exp '=' exp
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{ write_exp_elt_opcode (BINOP_ASSIGN); }
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;
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exp : exp ASSIGN_MODIFY exp
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{ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
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write_exp_elt_opcode ($2);
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write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
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||
;
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exp : INT
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{ write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type ($1.type);
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write_exp_elt_longcst ((LONGEST)($1.val));
|
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write_exp_elt_opcode (OP_LONG); }
|
||
;
|
||
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||
exp : NAME_OR_INT
|
||
{ YYSTYPE val;
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parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
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write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (val.typed_val.type);
|
||
write_exp_elt_longcst ((LONGEST)val.typed_val.val);
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||
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_opcode (OP_DOUBLE); }
|
||
;
|
||
|
||
exp : variable
|
||
;
|
||
|
||
exp : LAST
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||
{ write_exp_elt_opcode (OP_LAST);
|
||
write_exp_elt_longcst ((LONGEST) $1);
|
||
write_exp_elt_opcode (OP_LAST); }
|
||
;
|
||
|
||
exp : REGNAME
|
||
{ write_exp_elt_opcode (OP_REGISTER);
|
||
write_exp_elt_longcst ((LONGEST) $1);
|
||
write_exp_elt_opcode (OP_REGISTER); }
|
||
;
|
||
|
||
exp : VARIABLE
|
||
{ write_exp_elt_opcode (OP_INTERNALVAR);
|
||
write_exp_elt_intern ($1);
|
||
write_exp_elt_opcode (OP_INTERNALVAR); }
|
||
;
|
||
|
||
exp : SIZEOF '(' type ')' %prec UNARY
|
||
{ write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type_int);
|
||
write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
|
||
write_exp_elt_opcode (OP_LONG); }
|
||
;
|
||
|
||
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. */
|
||
char *sp = $1.ptr; int count = $1.length;
|
||
while (count-- > 0)
|
||
{
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type_char);
|
||
write_exp_elt_longcst ((LONGEST)(*sp++));
|
||
write_exp_elt_opcode (OP_LONG);
|
||
}
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (builtin_type_char);
|
||
write_exp_elt_longcst ((LONGEST)'\0');
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_opcode (OP_ARRAY);
|
||
write_exp_elt_longcst ((LONGEST) 0);
|
||
write_exp_elt_longcst ((LONGEST) ($1.length));
|
||
write_exp_elt_opcode (OP_ARRAY); }
|
||
;
|
||
|
||
/* C++. */
|
||
exp : THIS
|
||
{ write_exp_elt_opcode (OP_THIS);
|
||
write_exp_elt_opcode (OP_THIS); }
|
||
;
|
||
|
||
/* end of C++. */
|
||
|
||
block : BLOCKNAME
|
||
{
|
||
if ($1.sym != 0)
|
||
$$ = SYMBOL_BLOCK_VALUE ($1.sym);
|
||
else
|
||
{
|
||
struct symtab *tem =
|
||
lookup_symtab (copy_name ($1.stoken));
|
||
if (tem)
|
||
$$ = BLOCKVECTOR_BLOCK
|
||
(BLOCKVECTOR (tem), STATIC_BLOCK);
|
||
else
|
||
error ("No file or function \"%s\".",
|
||
copy_name ($1.stoken));
|
||
}
|
||
}
|
||
;
|
||
|
||
block : block COLONCOLON name
|
||
{ struct symbol *tem
|
||
= lookup_symbol (copy_name ($3), $1,
|
||
VAR_NAMESPACE, (int *) NULL,
|
||
(struct symtab **) NULL);
|
||
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
|
||
error ("No function \"%s\" in specified context.",
|
||
copy_name ($3));
|
||
$$ = SYMBOL_BLOCK_VALUE (tem); }
|
||
;
|
||
|
||
variable: block COLONCOLON name
|
||
{ struct symbol *sym;
|
||
sym = lookup_symbol (copy_name ($3), $1,
|
||
VAR_NAMESPACE, (int *) NULL,
|
||
(struct symtab **) 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
|
||
{
|
||
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 (OP_SCOPE);
|
||
write_exp_elt_type (type);
|
||
write_exp_string ($3);
|
||
write_exp_elt_opcode (OP_SCOPE);
|
||
}
|
||
| typebase COLONCOLON '~' name
|
||
{
|
||
struct type *type = $1;
|
||
struct stoken tmp_token;
|
||
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));
|
||
|
||
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;
|
||
write_exp_elt_opcode (OP_SCOPE);
|
||
write_exp_elt_type (type);
|
||
write_exp_string (tmp_token);
|
||
write_exp_elt_opcode (OP_SCOPE);
|
||
}
|
||
;
|
||
|
||
variable: qualified_name
|
||
| COLONCOLON name
|
||
{
|
||
char *name = copy_name ($2);
|
||
struct symbol *sym;
|
||
struct minimal_symbol *msymbol;
|
||
|
||
sym =
|
||
lookup_symbol (name, (const struct block *) NULL,
|
||
VAR_NAMESPACE, (int *) NULL,
|
||
(struct symtab **) 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);
|
||
if (msymbol != NULL)
|
||
{
|
||
write_exp_msymbol (msymbol,
|
||
lookup_function_type (builtin_type_int),
|
||
builtin_type_int);
|
||
}
|
||
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 symbol *sym = $1.sym;
|
||
|
||
if (sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym))
|
||
{
|
||
if (innermost_block == 0 ||
|
||
contained_in (block_found,
|
||
innermost_block))
|
||
innermost_block = block_found;
|
||
}
|
||
|
||
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);
|
||
}
|
||
else if ($1.is_a_field_of_this)
|
||
{
|
||
/* 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))
|
||
innermost_block = block_found;
|
||
write_exp_elt_opcode (OP_THIS);
|
||
write_exp_elt_opcode (OP_THIS);
|
||
write_exp_elt_opcode (STRUCTOP_PTR);
|
||
write_exp_string ($1.stoken);
|
||
write_exp_elt_opcode (STRUCTOP_PTR);
|
||
}
|
||
else
|
||
{
|
||
struct minimal_symbol *msymbol;
|
||
register char *arg = copy_name ($1.stoken);
|
||
|
||
msymbol = lookup_minimal_symbol (arg,
|
||
(struct objfile *) NULL);
|
||
if (msymbol != NULL)
|
||
{
|
||
write_exp_msymbol (msymbol,
|
||
lookup_function_type (builtin_type_int),
|
||
builtin_type_int);
|
||
}
|
||
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
|
||
/* "const" and "volatile" are curently ignored. A type qualifier
|
||
before the type is currently handled in the typebase rule.
|
||
The reason for recognizing these here (shift/reduce conflicts)
|
||
might be obsolete now that some pointer to member rules have
|
||
been deleted. */
|
||
| typebase CONST_KEYWORD
|
||
| typebase VOLATILE_KEYWORD
|
||
| typebase abs_decl
|
||
{ $$ = follow_types ($1); }
|
||
| typebase CONST_KEYWORD abs_decl
|
||
{ $$ = follow_types ($1); }
|
||
| typebase VOLATILE_KEYWORD abs_decl
|
||
{ $$ = follow_types ($1); }
|
||
;
|
||
|
||
abs_decl: '*'
|
||
{ push_type (tp_pointer); $$ = 0; }
|
||
| '*' abs_decl
|
||
{ push_type (tp_pointer); $$ = $2; }
|
||
| '&'
|
||
{ push_type (tp_reference); $$ = 0; }
|
||
| '&' abs_decl
|
||
{ push_type (tp_reference); $$ = $2; }
|
||
| direct_abs_decl
|
||
;
|
||
|
||
direct_abs_decl: '(' abs_decl ')'
|
||
{ $$ = $2; }
|
||
| direct_abs_decl array_mod
|
||
{
|
||
push_type_int ($2);
|
||
push_type (tp_array);
|
||
}
|
||
| array_mod
|
||
{
|
||
push_type_int ($1);
|
||
push_type (tp_array);
|
||
$$ = 0;
|
||
}
|
||
|
||
| direct_abs_decl func_mod
|
||
{ push_type (tp_function); }
|
||
| func_mod
|
||
{ push_type (tp_function); }
|
||
;
|
||
|
||
array_mod: '[' ']'
|
||
{ $$ = -1; }
|
||
| '[' INT ']'
|
||
{ $$ = $2.val; }
|
||
;
|
||
|
||
func_mod: '(' ')'
|
||
{ $$ = 0; }
|
||
| '(' nonempty_typelist ')'
|
||
{ free ((PTR)$2); $$ = 0; }
|
||
;
|
||
|
||
/* We used to try to recognize more pointer to member types here, but
|
||
that didn't work (shift/reduce conflicts meant that these rules never
|
||
got executed). The problem is that
|
||
int (foo::bar::baz::bizzle)
|
||
is a function type but
|
||
int (foo::bar::baz::bizzle::*)
|
||
is a pointer to member type. Stroustrup loses again! */
|
||
|
||
type : ptype
|
||
| typebase COLONCOLON '*'
|
||
{ $$ = lookup_member_type (builtin_type_int, $1); }
|
||
;
|
||
|
||
typebase /* Implements (approximately): (type-qualifier)* type-specifier */
|
||
: TYPENAME
|
||
{ $$ = $1.type; }
|
||
| INT_KEYWORD
|
||
{ $$ = builtin_type_int; }
|
||
| LONG
|
||
{ $$ = builtin_type_long; }
|
||
| SHORT
|
||
{ $$ = builtin_type_short; }
|
||
| LONG INT_KEYWORD
|
||
{ $$ = builtin_type_long; }
|
||
| UNSIGNED LONG INT_KEYWORD
|
||
{ $$ = builtin_type_unsigned_long; }
|
||
| LONG LONG
|
||
{ $$ = builtin_type_long_long; }
|
||
| LONG LONG INT_KEYWORD
|
||
{ $$ = builtin_type_long_long; }
|
||
| UNSIGNED LONG LONG
|
||
{ $$ = builtin_type_unsigned_long_long; }
|
||
| UNSIGNED LONG LONG INT_KEYWORD
|
||
{ $$ = builtin_type_unsigned_long_long; }
|
||
| SHORT INT_KEYWORD
|
||
{ $$ = builtin_type_short; }
|
||
| UNSIGNED SHORT INT_KEYWORD
|
||
{ $$ = builtin_type_unsigned_short; }
|
||
| STRUCT name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| CLASS name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| UNION name
|
||
{ $$ = lookup_union (copy_name ($2),
|
||
expression_context_block); }
|
||
| ENUM name
|
||
{ $$ = lookup_enum (copy_name ($2),
|
||
expression_context_block); }
|
||
| UNSIGNED typename
|
||
{ $$ = lookup_unsigned_typename (TYPE_NAME($2.type)); }
|
||
| UNSIGNED
|
||
{ $$ = builtin_type_unsigned_int; }
|
||
| SIGNED_KEYWORD typename
|
||
{ $$ = lookup_signed_typename (TYPE_NAME($2.type)); }
|
||
| SIGNED_KEYWORD
|
||
{ $$ = builtin_type_int; }
|
||
| TEMPLATE name '<' type '>'
|
||
{ $$ = lookup_template_type(copy_name($2), $4,
|
||
expression_context_block);
|
||
}
|
||
/* "const" and "volatile" are curently ignored. A type qualifier
|
||
after the type is handled in the ptype rule. I think these could
|
||
be too. */
|
||
| CONST_KEYWORD typebase { $$ = $2; }
|
||
| VOLATILE_KEYWORD typebase { $$ = $2; }
|
||
;
|
||
|
||
typename: TYPENAME
|
||
| INT_KEYWORD
|
||
{
|
||
$$.stoken.ptr = "int";
|
||
$$.stoken.length = 3;
|
||
$$.type = builtin_type_int;
|
||
}
|
||
| LONG
|
||
{
|
||
$$.stoken.ptr = "long";
|
||
$$.stoken.length = 4;
|
||
$$.type = builtin_type_long;
|
||
}
|
||
| SHORT
|
||
{
|
||
$$.stoken.ptr = "short";
|
||
$$.stoken.length = 5;
|
||
$$.type = builtin_type_short;
|
||
}
|
||
;
|
||
|
||
nonempty_typelist
|
||
: type
|
||
{ $$ = (struct type **) malloc (sizeof (struct type *) * 2);
|
||
$<ivec>$[0] = 1; /* Number of types in vector */
|
||
$$[1] = $1;
|
||
}
|
||
| nonempty_typelist ',' type
|
||
{ int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
|
||
$$ = (struct type **) realloc ((char *) $1, len);
|
||
$$[$<ivec>$[0]] = $3;
|
||
}
|
||
;
|
||
|
||
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 (p, len, parsed_float, putithere)
|
||
register char *p;
|
||
register int len;
|
||
int parsed_float;
|
||
YYSTYPE *putithere;
|
||
{
|
||
register LONGEST n = 0;
|
||
register LONGEST prevn = 0;
|
||
register int i = 0;
|
||
register int c;
|
||
register int base = input_radix;
|
||
int unsigned_p = 0;
|
||
int long_p = 0;
|
||
unsigned LONGEST 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);
|
||
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')
|
||
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;
|
||
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). */
|
||
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;
|
||
}
|
||
|
||
/* 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.
|
||
|
||
In the expression below, we could have tested
|
||
(n >> TARGET_INT_BIT)
|
||
to see if it was zero,
|
||
but too many compilers warn about that, when ints and longs
|
||
are the same size. So we shift it twice, with fewer bits
|
||
each time, for the same result. */
|
||
|
||
if ( (TARGET_INT_BIT != TARGET_LONG_BIT
|
||
&& ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
|
||
|| long_p)
|
||
{
|
||
high_bit = ((unsigned LONGEST)1) << (TARGET_LONG_BIT-1);
|
||
unsigned_type = builtin_type_unsigned_long;
|
||
signed_type = builtin_type_long;
|
||
}
|
||
else
|
||
{
|
||
high_bit = ((unsigned LONGEST)1) << (TARGET_INT_BIT-1);
|
||
unsigned_type = builtin_type_unsigned_int;
|
||
signed_type = builtin_type_int;
|
||
}
|
||
|
||
putithere->typed_val.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;
|
||
}
|
||
else
|
||
{
|
||
putithere->typed_val.type = signed_type;
|
||
}
|
||
|
||
return INT;
|
||
}
|
||
|
||
struct token
|
||
{
|
||
char *operator;
|
||
int token;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
static const struct token tokentab3[] =
|
||
{
|
||
{">>=", ASSIGN_MODIFY, BINOP_RSH},
|
||
{"<<=", ASSIGN_MODIFY, BINOP_LSH}
|
||
};
|
||
|
||
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}
|
||
};
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
yylex ()
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int i;
|
||
char *tokstart;
|
||
char *tokptr;
|
||
int tempbufindex;
|
||
static char *tempbuf;
|
||
static int tempbufsize;
|
||
|
||
retry:
|
||
|
||
tokstart = lexptr;
|
||
/* See if it is a special token of length 3. */
|
||
for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
|
||
if (STREQN (tokstart, tokentab3[i].operator, 3))
|
||
{
|
||
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 (STREQN (tokstart, tokentab2[i].operator, 2))
|
||
{
|
||
lexptr += 2;
|
||
yylval.opcode = tokentab2[i].opcode;
|
||
return tokentab2[i].token;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
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;
|
||
if (lexptr[-1] != '\'')
|
||
error ("Unmatched single quote.");
|
||
namelen -= 2;
|
||
tokstart++;
|
||
goto tryname;
|
||
}
|
||
error ("Invalid character constant.");
|
||
}
|
||
return INT;
|
||
|
||
case '(':
|
||
paren_depth++;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ')':
|
||
if (paren_depth == 0)
|
||
return 0;
|
||
paren_depth--;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ',':
|
||
if (comma_terminates && paren_depth == 0)
|
||
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. */
|
||
/* FALL THRU into number case. */
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
{
|
||
/* It's a number. */
|
||
int got_dot = 0, got_e = 0, toktype;
|
||
register char *p = tokstart;
|
||
int hex = input_radix > 10;
|
||
|
||
if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
|
||
{
|
||
p += 2;
|
||
hex = 1;
|
||
}
|
||
else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
|
||
{
|
||
p += 2;
|
||
hex = 0;
|
||
}
|
||
|
||
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;
|
||
/* 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 == '+'))
|
||
/* This is the sign of the exponent, not the end of the
|
||
number. */
|
||
continue;
|
||
/* We will take any letters or digits. parse_number will
|
||
complain if past the radix, or if L or U are not final. */
|
||
else if ((*p < '0' || *p > '9')
|
||
&& ((*p < 'a' || *p > 'z')
|
||
&& (*p < 'A' || *p > 'Z')))
|
||
break;
|
||
}
|
||
toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval);
|
||
if (toktype == ERROR)
|
||
{
|
||
char *err_copy = (char *) alloca (p - tokstart + 1);
|
||
|
||
memcpy (err_copy, tokstart, p - tokstart);
|
||
err_copy[p - tokstart] = 0;
|
||
error ("Invalid number \"%s\".", err_copy);
|
||
}
|
||
lexptr = p;
|
||
return toktype;
|
||
}
|
||
|
||
case '+':
|
||
case '-':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '|':
|
||
case '&':
|
||
case '^':
|
||
case '~':
|
||
case '!':
|
||
case '@':
|
||
case '<':
|
||
case '>':
|
||
case '[':
|
||
case ']':
|
||
case '?':
|
||
case ':':
|
||
case '=':
|
||
case '{':
|
||
case '}':
|
||
symbol:
|
||
lexptr++;
|
||
return c;
|
||
|
||
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)
|
||
{
|
||
case '\0':
|
||
case '"':
|
||
/* Do nothing, loop will terminate. */
|
||
break;
|
||
case '\\':
|
||
tokptr++;
|
||
c = parse_escape (&tokptr);
|
||
if (c == -1)
|
||
{
|
||
continue;
|
||
}
|
||
tempbuf[tempbufindex++] = c;
|
||
break;
|
||
default:
|
||
tempbuf[tempbufindex++] = *tokptr++;
|
||
break;
|
||
}
|
||
} 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);
|
||
}
|
||
|
||
if (!(c == '_' || c == '$'
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
|
||
/* We must have come across a bad character (e.g. ';'). */
|
||
error ("Invalid character '%c' in expression.", c);
|
||
|
||
/* It's a name. See how long it is. */
|
||
namelen = 0;
|
||
for (c = tokstart[namelen];
|
||
(c == '_' || c == '$' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
|
||
c = tokstart[++namelen])
|
||
;
|
||
|
||
/* The token "if" terminates the expression and is NOT
|
||
removed from the input stream. */
|
||
if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
lexptr += namelen;
|
||
|
||
/* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
|
||
and $$digits (equivalent to $<-digits> if you could type that).
|
||
Make token type LAST, and put the number (the digits) in yylval. */
|
||
|
||
tryname:
|
||
if (*tokstart == '$')
|
||
{
|
||
register int negate = 0;
|
||
c = 1;
|
||
/* Double dollar means negate the number and add -1 as well.
|
||
Thus $$ 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.lval = atoi (tokstart + 1 + negate);
|
||
if (negate)
|
||
yylval.lval = - yylval.lval;
|
||
return LAST;
|
||
}
|
||
}
|
||
|
||
/* Handle tokens that refer to machine registers:
|
||
$ followed by a register name. */
|
||
|
||
if (*tokstart == '$') {
|
||
for (c = 0; c < NUM_REGS; c++)
|
||
if (namelen - 1 == strlen (reg_names[c])
|
||
&& STREQN (tokstart + 1, reg_names[c], namelen - 1))
|
||
{
|
||
yylval.lval = c;
|
||
return REGNAME;
|
||
}
|
||
for (c = 0; c < num_std_regs; c++)
|
||
if (namelen - 1 == strlen (std_regs[c].name)
|
||
&& STREQN (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)
|
||
{
|
||
case 8:
|
||
if (STREQN (tokstart, "unsigned", 8))
|
||
return UNSIGNED;
|
||
if (current_language->la_language == language_cplus
|
||
&& STREQN (tokstart, "template", 8))
|
||
return TEMPLATE;
|
||
if (STREQN (tokstart, "volatile", 8))
|
||
return VOLATILE_KEYWORD;
|
||
break;
|
||
case 6:
|
||
if (STREQN (tokstart, "struct", 6))
|
||
return STRUCT;
|
||
if (STREQN (tokstart, "signed", 6))
|
||
return SIGNED_KEYWORD;
|
||
if (STREQN (tokstart, "sizeof", 6))
|
||
return SIZEOF;
|
||
break;
|
||
case 5:
|
||
if (current_language->la_language == language_cplus
|
||
&& STREQN (tokstart, "class", 5))
|
||
return CLASS;
|
||
if (STREQN (tokstart, "union", 5))
|
||
return UNION;
|
||
if (STREQN (tokstart, "short", 5))
|
||
return SHORT;
|
||
if (STREQN (tokstart, "const", 5))
|
||
return CONST_KEYWORD;
|
||
break;
|
||
case 4:
|
||
if (STREQN (tokstart, "enum", 4))
|
||
return ENUM;
|
||
if (STREQN (tokstart, "long", 4))
|
||
return LONG;
|
||
if (current_language->la_language == language_cplus
|
||
&& STREQN (tokstart, "this", 4))
|
||
{
|
||
static const char this_name[] =
|
||
{ CPLUS_MARKER, 't', 'h', 'i', 's', '\0' };
|
||
|
||
if (lookup_symbol (this_name, expression_context_block,
|
||
VAR_NAMESPACE, (int *) NULL,
|
||
(struct symtab **) NULL))
|
||
return THIS;
|
||
}
|
||
break;
|
||
case 3:
|
||
if (STREQN (tokstart, "int", 3))
|
||
return INT_KEYWORD;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
/* Any other names starting in $ are debugger internal variables. */
|
||
|
||
if (*tokstart == '$')
|
||
{
|
||
yylval.ivar = lookup_internalvar (copy_name (yylval.sval) + 1);
|
||
return VARIABLE;
|
||
}
|
||
|
||
/* 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 : (int *) NULL,
|
||
(struct symtab **) NULL);
|
||
/* Call lookup_symtab, not lookup_partial_symtab, in case there are
|
||
no psymtabs (coff, xcoff, or some future change to blow away the
|
||
psymtabs once once symbols are read). */
|
||
if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) ||
|
||
lookup_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)
|
||
{
|
||
char *p;
|
||
char *namestart;
|
||
struct symbol *best_sym;
|
||
|
||
/* Look ahead to detect nested types. This probably should be
|
||
done in the grammar, but trying seemed to introduce a lot
|
||
of shift/reduce and reduce/reduce conflicts. It's possible
|
||
that it could be done, though. Or perhaps a non-grammar, but
|
||
less ad hoc, approach would work well. */
|
||
|
||
/* Since we do not currently have any way of distinguishing
|
||
a nested type from a non-nested one (the stabs don't tell
|
||
us whether a type is nested), we just ignore the
|
||
containing type. */
|
||
|
||
p = lexptr;
|
||
best_sym = sym;
|
||
while (1)
|
||
{
|
||
/* Skip whitespace. */
|
||
while (*p == ' ' || *p == '\t' || *p == '\n')
|
||
++p;
|
||
if (*p == ':' && p[1] == ':')
|
||
{
|
||
/* Skip the `::'. */
|
||
p += 2;
|
||
/* Skip whitespace. */
|
||
while (*p == ' ' || *p == '\t' || *p == '\n')
|
||
++p;
|
||
namestart = p;
|
||
while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
|
||
|| (*p >= 'a' && *p <= 'z')
|
||
|| (*p >= 'A' && *p <= 'Z'))
|
||
++p;
|
||
if (p != namestart)
|
||
{
|
||
struct symbol *cur_sym;
|
||
/* As big as the whole rest of the expression, which is
|
||
at least big enough. */
|
||
char *tmp = alloca (strlen (namestart));
|
||
|
||
memcpy (tmp, namestart, p - namestart);
|
||
tmp[p - namestart] = '\0';
|
||
cur_sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_NAMESPACE, (int *) NULL,
|
||
(struct symtab **) NULL);
|
||
if (cur_sym)
|
||
{
|
||
if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
|
||
{
|
||
best_sym = cur_sym;
|
||
lexptr = p;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
|
||
yylval.tsym.type = SYMBOL_TYPE (best_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;
|
||
}
|
||
}
|
||
|
||
/* Any other kind of symbol */
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
return NAME;
|
||
}
|
||
}
|
||
|
||
void
|
||
yyerror (msg)
|
||
char *msg;
|
||
{
|
||
error (msg ? msg : "Invalid syntax in expression.");
|
||
}
|