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1798 lines
46 KiB
Plaintext
1798 lines
46 KiB
Plaintext
/* YACC parser for C expressions, for GDB.
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Copyright (C) 1986, 1989, 1990, 1991, 1993, 1994, 2002, 2006, 2007, 2008,
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2009, 2010 Free Software Foundation, Inc.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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/* Parse a C expression from text in a string, and return the result
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as a struct expression pointer. That structure contains arithmetic
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operations in reverse polish, with constants represented by
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operations that are followed by special data. See expression.h for
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the details of the format. What is important here is that it can
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be built up sequentially during the process of parsing; the lower
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levels of the tree always 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
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parser generator. Doing this with #defines and trying to control
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the interaction with include files (<malloc.h> and <stdlib.h> for
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example) just became too messy, particularly when such includes can
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be inserted at random times by the parser generator. */
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%{
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#include "defs.h"
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#include "gdb_string.h"
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#include <ctype.h>
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#include "expression.h"
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#include "objc-lang.h" /* For objc language constructs. */
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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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#include "top.h"
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#include "completer.h" /* For skip_quoted(). */
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#include "block.h"
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#define parse_type builtin_type (parse_gdbarch)
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/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
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etc), as well as gratuitiously global symbol names, so we can have
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multiple yacc generated parsers in gdb. Note that these are only
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the variables produced by yacc. If other parser generators (bison,
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byacc, etc) produce additional global names that conflict at link
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time, then those parser generators need to be fixed instead of
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adding those names to this list. */
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#define yymaxdepth objc_maxdepth
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#define yyparse objc_parse
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#define yylex objc_lex
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#define yyerror objc_error
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#define yylval objc_lval
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#define yychar objc_char
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#define yydebug objc_debug
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#define yypact objc_pact
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#define yyr1 objc_r1
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#define yyr2 objc_r2
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#define yydef objc_def
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#define yychk objc_chk
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#define yypgo objc_pgo
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#define yyact objc_act
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#define yyexca objc_exca
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#define yyerrflag objc_errflag
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#define yynerrs objc_nerrs
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#define yyps objc_ps
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#define yypv objc_pv
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#define yys objc_s
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#define yy_yys objc_yys
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#define yystate objc_state
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#define yytmp objc_tmp
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#define yyv objc_v
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#define yy_yyv objc_yyv
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#define yyval objc_val
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#define yylloc objc_lloc
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#define yyreds objc_reds /* With YYDEBUG defined */
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#define yytoks objc_toks /* With YYDEBUG defined */
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#define yyname objc_name /* With YYDEBUG defined */
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#define yyrule objc_rule /* With YYDEBUG defined */
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#define yylhs objc_yylhs
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#define yylen objc_yylen
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#define yydefred objc_yydefred
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#define yydgoto objc_yydgoto
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#define yysindex objc_yysindex
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#define yyrindex objc_yyrindex
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#define yygindex objc_yygindex
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#define yytable objc_yytable
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#define yycheck objc_yycheck
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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 (void);
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static int
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yylex (void);
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void
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yyerror (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_int;
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struct {
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DOUBLEST dval;
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struct type *type;
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} typed_val_float;
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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 objc_class_str class;
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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 (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> INT
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%token <typed_val_float> FLOAT
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/* Both NAME and TYPENAME tokens represent symbols in the input, and
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both convey their data as strings. But a TYPENAME is a string that
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happens to be defined as a typedef or builtin type name (such as
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int or char) and a NAME is any other symbol. Contexts where this
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distinction is not important can use the nonterminal "name", which
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matches either NAME or TYPENAME. */
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%token <sval> STRING
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%token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
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%token <sval> SELECTOR /* ObjC "@selector" pseudo-operator */
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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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%token <class> CLASSNAME /* ObjC Class name */
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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
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different legal basetypes. */
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%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
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%token <voidval> VARIABLE
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%token <opcode> ASSIGN_MODIFY
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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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;
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exp : '&' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_ADDR); }
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;
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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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/*
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* The rules below parse ObjC message calls of the form:
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* '[' target selector {':' argument}* ']'
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*/
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exp : '[' TYPENAME
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{
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CORE_ADDR class;
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class = lookup_objc_class (parse_gdbarch,
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copy_name ($2.stoken));
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if (class == 0)
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error ("%s is not an ObjC Class",
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copy_name ($2.stoken));
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write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type (parse_type->builtin_int);
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write_exp_elt_longcst ((LONGEST) class);
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write_exp_elt_opcode (OP_LONG);
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start_msglist();
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}
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msglist ']'
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{ write_exp_elt_opcode (OP_OBJC_MSGCALL);
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end_msglist();
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write_exp_elt_opcode (OP_OBJC_MSGCALL);
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}
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;
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exp : '[' CLASSNAME
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{
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write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type (parse_type->builtin_int);
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write_exp_elt_longcst ((LONGEST) $2.class);
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write_exp_elt_opcode (OP_LONG);
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start_msglist();
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}
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msglist ']'
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{ write_exp_elt_opcode (OP_OBJC_MSGCALL);
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end_msglist();
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write_exp_elt_opcode (OP_OBJC_MSGCALL);
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}
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;
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exp : '[' exp
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{ start_msglist(); }
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msglist ']'
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{ write_exp_elt_opcode (OP_OBJC_MSGCALL);
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end_msglist();
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write_exp_elt_opcode (OP_OBJC_MSGCALL);
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}
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;
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msglist : name
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{ add_msglist(&$1, 0); }
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| msgarglist
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;
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msgarglist : msgarg
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| msgarglist msgarg
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;
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msgarg : name ':' exp
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{ add_msglist(&$1, 1); }
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| ':' exp /* Unnamed arg. */
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{ add_msglist(0, 1); }
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| ',' exp /* Variable number of args. */
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{ add_msglist(0, 0); }
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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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exp : exp '+' exp
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||
{ write_exp_elt_opcode (BINOP_ADD); }
|
||
;
|
||
|
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exp : exp '-' exp
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{ write_exp_elt_opcode (BINOP_SUB); }
|
||
;
|
||
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exp : exp LSH exp
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||
{ write_exp_elt_opcode (BINOP_LSH); }
|
||
;
|
||
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exp : exp RSH exp
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||
{ write_exp_elt_opcode (BINOP_RSH); }
|
||
;
|
||
|
||
exp : exp EQUAL exp
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||
{ write_exp_elt_opcode (BINOP_EQUAL); }
|
||
;
|
||
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||
exp : exp NOTEQUAL exp
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||
{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
|
||
;
|
||
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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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||
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||
exp : exp GEQ exp
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||
{ write_exp_elt_opcode (BINOP_GEQ); }
|
||
;
|
||
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exp : exp '<' exp
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{ write_exp_elt_opcode (BINOP_LESS); }
|
||
;
|
||
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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
|
||
{ write_exp_elt_opcode (BINOP_BITWISE_XOR); }
|
||
;
|
||
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||
exp : exp '|' exp
|
||
{ write_exp_elt_opcode (BINOP_BITWISE_IOR); }
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||
;
|
||
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||
exp : exp ANDAND exp
|
||
{ write_exp_elt_opcode (BINOP_LOGICAL_AND); }
|
||
;
|
||
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||
exp : exp OROR exp
|
||
{ write_exp_elt_opcode (BINOP_LOGICAL_OR); }
|
||
;
|
||
|
||
exp : exp '?' exp ':' exp %prec '?'
|
||
{ write_exp_elt_opcode (TERNOP_COND); }
|
||
;
|
||
|
||
exp : exp '=' exp
|
||
{ write_exp_elt_opcode (BINOP_ASSIGN); }
|
||
;
|
||
|
||
exp : exp ASSIGN_MODIFY exp
|
||
{ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode ($2);
|
||
write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
|
||
;
|
||
|
||
exp : INT
|
||
{ write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type ($1.type);
|
||
write_exp_elt_longcst ((LONGEST)($1.val));
|
||
write_exp_elt_opcode (OP_LONG); }
|
||
;
|
||
|
||
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_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 ($1.type);
|
||
write_exp_elt_dblcst ($1.dval);
|
||
write_exp_elt_opcode (OP_DOUBLE); }
|
||
;
|
||
|
||
exp : variable
|
||
;
|
||
|
||
exp : VARIABLE
|
||
/* Already written by write_dollar_variable. */
|
||
;
|
||
|
||
exp : SELECTOR
|
||
{
|
||
write_exp_elt_opcode (OP_OBJC_SELECTOR);
|
||
write_exp_string ($1);
|
||
write_exp_elt_opcode (OP_OBJC_SELECTOR); }
|
||
;
|
||
|
||
exp : SIZEOF '(' type ')' %prec UNARY
|
||
{ write_exp_elt_opcode (OP_LONG);
|
||
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
|
||
{ /* 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 (parse_type->builtin_char);
|
||
write_exp_elt_longcst ((LONGEST)(*sp++));
|
||
write_exp_elt_opcode (OP_LONG);
|
||
}
|
||
write_exp_elt_opcode (OP_LONG);
|
||
write_exp_elt_type (parse_type->builtin_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); }
|
||
;
|
||
|
||
exp : NSSTRING /* ObjC NextStep NSString constant
|
||
* of the form '@' '"' string '"'.
|
||
*/
|
||
{ write_exp_elt_opcode (OP_OBJC_NSSTRING);
|
||
write_exp_string ($1);
|
||
write_exp_elt_opcode (OP_OBJC_NSSTRING); }
|
||
;
|
||
|
||
block : BLOCKNAME
|
||
{
|
||
if ($1.sym != 0)
|
||
$$ = SYMBOL_BLOCK_VALUE ($1.sym);
|
||
else
|
||
{
|
||
struct symtab *tem =
|
||
lookup_symtab (copy_name ($1.stoken));
|
||
if (tem)
|
||
$$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), STATIC_BLOCK);
|
||
else
|
||
error ("No file or function \"%s\".",
|
||
copy_name ($1.stoken));
|
||
}
|
||
}
|
||
;
|
||
|
||
block : block COLONCOLON name
|
||
{ struct symbol *tem
|
||
= lookup_symbol (copy_name ($3), $1,
|
||
VAR_DOMAIN, (int *) NULL);
|
||
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
|
||
error ("No function \"%s\" in specified context.",
|
||
copy_name ($3));
|
||
$$ = SYMBOL_BLOCK_VALUE (tem); }
|
||
;
|
||
|
||
variable: block COLONCOLON name
|
||
{ struct symbol *sym;
|
||
sym = lookup_symbol (copy_name ($3), $1,
|
||
VAR_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
|
||
{
|
||
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 (strcmp (type_name_no_tag (type), $4.ptr) != 0)
|
||
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_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, NULL, NULL);
|
||
if (msymbol != NULL)
|
||
write_exp_msymbol (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 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++/ObjC: it hangs off of `this'/'self'.
|
||
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_OBJC_SELF);
|
||
write_exp_elt_opcode (OP_OBJC_SELF);
|
||
write_exp_elt_opcode (STRUCTOP_PTR);
|
||
write_exp_string ($1.stoken);
|
||
write_exp_elt_opcode (STRUCTOP_PTR);
|
||
}
|
||
else
|
||
{
|
||
struct minimal_symbol *msymbol;
|
||
char *arg = copy_name ($1.stoken);
|
||
|
||
msymbol =
|
||
lookup_minimal_symbol (arg, NULL, NULL);
|
||
if (msymbol != NULL)
|
||
write_exp_msymbol (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
|
||
/* "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 ($2); $$ = 0; }
|
||
;
|
||
|
||
/* We used to try to recognize more pointer to member types here, but
|
||
that didn't work (shift/reduce conflicts meant that these rules
|
||
never got executed). The problem is that
|
||
int (foo::bar::baz::bizzle)
|
||
is a function type but
|
||
int (foo::bar::baz::bizzle::*)
|
||
is a pointer to member type. Stroustrup loses again! */
|
||
|
||
type : ptype
|
||
;
|
||
|
||
typebase /* Implements (approximately): (type-qualifier)* type-specifier. */
|
||
: TYPENAME
|
||
{ $$ = $1.type; }
|
||
| CLASSNAME
|
||
{
|
||
if ($1.type == NULL)
|
||
error ("No symbol \"%s\" in current context.",
|
||
copy_name($1.stoken));
|
||
else
|
||
$$ = $1.type;
|
||
}
|
||
| INT_KEYWORD
|
||
{ $$ = parse_type->builtin_int; }
|
||
| LONG
|
||
{ $$ = parse_type->builtin_long; }
|
||
| SHORT
|
||
{ $$ = parse_type->builtin_short; }
|
||
| LONG INT_KEYWORD
|
||
{ $$ = parse_type->builtin_long; }
|
||
| UNSIGNED LONG INT_KEYWORD
|
||
{ $$ = parse_type->builtin_unsigned_long; }
|
||
| LONG LONG
|
||
{ $$ = parse_type->builtin_long_long; }
|
||
| LONG LONG INT_KEYWORD
|
||
{ $$ = parse_type->builtin_long_long; }
|
||
| UNSIGNED LONG LONG
|
||
{ $$ = parse_type->builtin_unsigned_long_long; }
|
||
| UNSIGNED LONG LONG INT_KEYWORD
|
||
{ $$ = parse_type->builtin_unsigned_long_long; }
|
||
| SHORT INT_KEYWORD
|
||
{ $$ = parse_type->builtin_short; }
|
||
| UNSIGNED SHORT INT_KEYWORD
|
||
{ $$ = parse_type->builtin_unsigned_short; }
|
||
| DOUBLE_KEYWORD
|
||
{ $$ = parse_type->builtin_double; }
|
||
| LONG DOUBLE_KEYWORD
|
||
{ $$ = parse_type->builtin_long_double; }
|
||
| STRUCT name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| CLASS name
|
||
{ $$ = 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
|
||
{ $$ = lookup_unsigned_typename (parse_language,
|
||
parse_gdbarch,
|
||
TYPE_NAME($2.type)); }
|
||
| UNSIGNED
|
||
{ $$ = parse_type->builtin_unsigned_int; }
|
||
| SIGNED_KEYWORD typename
|
||
{ $$ = lookup_signed_typename (parse_language,
|
||
parse_gdbarch,
|
||
TYPE_NAME($2.type)); }
|
||
| SIGNED_KEYWORD
|
||
{ $$ = parse_type->builtin_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 = parse_type->builtin_int;
|
||
}
|
||
| LONG
|
||
{
|
||
$$.stoken.ptr = "long";
|
||
$$.stoken.length = 4;
|
||
$$.type = parse_type->builtin_long;
|
||
}
|
||
| SHORT
|
||
{
|
||
$$.stoken.ptr = "short";
|
||
$$.stoken.length = 5;
|
||
$$.type = parse_type->builtin_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 { $$ = $1.stoken; }
|
||
| CLASSNAME { $$ = $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)
|
||
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;
|
||
unsigned LONGEST 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;
|
||
|
||
unsigned LONGEST high_bit;
|
||
struct type *signed_type;
|
||
struct type *unsigned_type;
|
||
|
||
if (parsed_float)
|
||
{
|
||
char c;
|
||
|
||
/* It's a float since it contains a point or an exponent. */
|
||
|
||
sscanf (p, "%" DOUBLEST_SCAN_FORMAT "%c",
|
||
&putithere->typed_val_float.dval, &c);
|
||
|
||
/* See if it has `f' or `l' suffix (float or long double). */
|
||
|
||
c = tolower (p[len - 1]);
|
||
|
||
if (c == 'f')
|
||
putithere->typed_val_float.type = parse_type->builtin_float;
|
||
else if (c == 'l')
|
||
putithere->typed_val_float.type = parse_type->builtin_long_double;
|
||
else if (isdigit (c) || c == '.')
|
||
putithere->typed_val_float.type = parse_type->builtin_double;
|
||
else
|
||
return ERROR;
|
||
|
||
return FLOAT;
|
||
}
|
||
|
||
/* Handle base-switching prefixes 0x, 0t, 0d, and 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 && (unsigned LONGEST) prevn >= (unsigned LONGEST) n))
|
||
error ("Numeric constant too large.");
|
||
}
|
||
prevn = n;
|
||
}
|
||
|
||
/* 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_int 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 = (unsigned LONGEST)n >> 2;
|
||
if (long_p == 0
|
||
&& (un >> (gdbarch_int_bit (parse_gdbarch) - 2)) == 0)
|
||
{
|
||
high_bit = ((unsigned LONGEST)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 = ((unsigned LONGEST)1) << (gdbarch_long_bit (parse_gdbarch) - 1);
|
||
unsigned_type = parse_type->builtin_unsigned_long;
|
||
signed_type = parse_type->builtin_long;
|
||
}
|
||
else
|
||
{
|
||
high_bit = (((unsigned LONGEST)1)
|
||
<< (gdbarch_long_long_bit (parse_gdbarch) - 32 - 1)
|
||
<< 16
|
||
<< 16);
|
||
if (high_bit == 0)
|
||
/* A long long does not fit in a LONGEST. */
|
||
high_bit =
|
||
(unsigned LONGEST)1 << (sizeof (LONGEST) * HOST_CHAR_BIT - 1);
|
||
unsigned_type = parse_type->builtin_unsigned_long_long;
|
||
signed_type = parse_type->builtin_long_long;
|
||
}
|
||
|
||
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_int.type = unsigned_type;
|
||
}
|
||
else
|
||
{
|
||
putithere->typed_val_int.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, tokchr;
|
||
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 (strncmp (tokstart, tokentab3[i].operator, 3) == 0)
|
||
{
|
||
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) == 0)
|
||
{
|
||
lexptr += 2;
|
||
yylval.opcode = tokentab2[i].opcode;
|
||
return tokentab2[i].token;
|
||
}
|
||
|
||
c = 0;
|
||
switch (tokchr = *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);
|
||
else if (c == '\'')
|
||
error ("Empty character constant.");
|
||
|
||
yylval.typed_val_int.val = c;
|
||
yylval.typed_val_int.type = parse_type->builtin_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 '(';
|
||
|
||
case ')':
|
||
if (paren_depth == 0)
|
||
return 0;
|
||
paren_depth--;
|
||
lexptr++;
|
||
return ')';
|
||
|
||
case ',':
|
||
if (comma_terminates && paren_depth == 0)
|
||
return 0;
|
||
lexptr++;
|
||
return ',';
|
||
|
||
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 = FLOAT;
|
||
/* Initialize toktype to anything other than ERROR. */
|
||
char *p = tokstart;
|
||
int hex = input_radix > 10;
|
||
int local_radix = input_radix;
|
||
if (tokchr == '0' && (p[1] == 'x' || p[1] == 'X'))
|
||
{
|
||
p += 2;
|
||
hex = 1;
|
||
local_radix = 16;
|
||
}
|
||
else if (tokchr == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
|
||
{
|
||
p += 2;
|
||
hex = 0;
|
||
local_radix = 10;
|
||
}
|
||
|
||
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 && (*p == 'e' || *p == 'E'))
|
||
if (got_e)
|
||
toktype = ERROR; /* Only one 'e' in a float. */
|
||
else
|
||
got_e = 1;
|
||
/* This test does not include !hex, because a '.' always
|
||
indicates a decimal floating point number regardless of
|
||
the radix. */
|
||
else if (*p == '.')
|
||
if (got_dot)
|
||
toktype = ERROR; /* Only one '.' in a float. */
|
||
else
|
||
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;
|
||
/* Always take decimal digits; parse_number handles radix
|
||
error. */
|
||
else if (*p >= '0' && *p <= '9')
|
||
continue;
|
||
/* We will take letters only if hex is true, and only up
|
||
to what the input radix would permit. FSF was content
|
||
to rely on parse_number to validate; but it leaks. */
|
||
else if (*p >= 'a' && *p <= 'z')
|
||
{
|
||
if (!hex || *p >= ('a' + local_radix - 10))
|
||
toktype = ERROR;
|
||
}
|
||
else if (*p >= 'A' && *p <= 'Z')
|
||
{
|
||
if (!hex || *p >= ('A' + local_radix - 10))
|
||
toktype = ERROR;
|
||
}
|
||
else break;
|
||
}
|
||
if (toktype != ERROR)
|
||
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 '!':
|
||
#if 0
|
||
case '@': /* Moved out below. */
|
||
#endif
|
||
case '<':
|
||
case '>':
|
||
case '[':
|
||
case ']':
|
||
case '?':
|
||
case ':':
|
||
case '=':
|
||
case '{':
|
||
case '}':
|
||
symbol:
|
||
lexptr++;
|
||
return tokchr;
|
||
|
||
case '@':
|
||
if (strncmp(tokstart, "@selector", 9) == 0)
|
||
{
|
||
tokptr = strchr(tokstart, '(');
|
||
if (tokptr == NULL)
|
||
{
|
||
error ("Missing '(' in @selector(...)");
|
||
}
|
||
tempbufindex = 0;
|
||
tokptr++; /* Skip the '('. */
|
||
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);
|
||
}
|
||
tempbuf[tempbufindex++] = *tokptr++;
|
||
} while ((*tokptr != ')') && (*tokptr != '\0'));
|
||
if (*tokptr++ != ')')
|
||
{
|
||
error ("Missing ')' in @selector(...)");
|
||
}
|
||
tempbuf[tempbufindex] = '\0';
|
||
yylval.sval.ptr = tempbuf;
|
||
yylval.sval.length = tempbufindex;
|
||
lexptr = tokptr;
|
||
return SELECTOR;
|
||
}
|
||
if (tokstart[1] != '"')
|
||
{
|
||
lexptr++;
|
||
return tokchr;
|
||
}
|
||
/* ObjC NextStep NSString constant: fall thru and parse like
|
||
STRING. */
|
||
tokstart++;
|
||
|
||
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 (tokchr == '@' ? NSSTRING : STRING);
|
||
}
|
||
|
||
if (!(tokchr == '_' || tokchr == '$' ||
|
||
(tokchr >= 'a' && tokchr <= 'z') || (tokchr >= 'A' && tokchr <= '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 == '$' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
|
||
{
|
||
if (c == '<')
|
||
{
|
||
int i = namelen;
|
||
while (tokstart[++i] && tokstart[i] != '>');
|
||
if (tokstart[i] == '>')
|
||
namelen = i;
|
||
}
|
||
c = tokstart[++namelen];
|
||
}
|
||
|
||
/* The token "if" terminates the expression and is NOT
|
||
removed from the input stream. */
|
||
if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
lexptr += namelen;
|
||
|
||
tryname:
|
||
|
||
/* Catch specific keywords. Should be done with a data structure. */
|
||
switch (namelen)
|
||
{
|
||
case 8:
|
||
if (strncmp (tokstart, "unsigned", 8) == 0)
|
||
return UNSIGNED;
|
||
if (parse_language->la_language == language_cplus
|
||
&& strncmp (tokstart, "template", 8) == 0)
|
||
return TEMPLATE;
|
||
if (strncmp (tokstart, "volatile", 8) == 0)
|
||
return VOLATILE_KEYWORD;
|
||
break;
|
||
case 6:
|
||
if (strncmp (tokstart, "struct", 6) == 0)
|
||
return STRUCT;
|
||
if (strncmp (tokstart, "signed", 6) == 0)
|
||
return SIGNED_KEYWORD;
|
||
if (strncmp (tokstart, "sizeof", 6) == 0)
|
||
return SIZEOF;
|
||
if (strncmp (tokstart, "double", 6) == 0)
|
||
return DOUBLE_KEYWORD;
|
||
break;
|
||
case 5:
|
||
if ((parse_language->la_language == language_cplus)
|
||
&& strncmp (tokstart, "class", 5) == 0)
|
||
return CLASS;
|
||
if (strncmp (tokstart, "union", 5) == 0)
|
||
return UNION;
|
||
if (strncmp (tokstart, "short", 5) == 0)
|
||
return SHORT;
|
||
if (strncmp (tokstart, "const", 5) == 0)
|
||
return CONST_KEYWORD;
|
||
break;
|
||
case 4:
|
||
if (strncmp (tokstart, "enum", 4) == 0)
|
||
return ENUM;
|
||
if (strncmp (tokstart, "long", 4) == 0)
|
||
return LONG;
|
||
break;
|
||
case 3:
|
||
if (strncmp (tokstart, "int", 3) == 0)
|
||
return INT_KEYWORD;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
if (*tokstart == '$')
|
||
{
|
||
write_dollar_variable (yylval.sval);
|
||
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, *need_this;
|
||
int hextype;
|
||
|
||
if (parse_language->la_language == language_cplus ||
|
||
parse_language->la_language == language_objc)
|
||
need_this = &is_a_field_of_this;
|
||
else
|
||
need_this = (int *) NULL;
|
||
|
||
sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_DOMAIN,
|
||
need_this);
|
||
/* 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 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)
|
||
{
|
||
#if 1
|
||
/* Despite the following flaw, we need to keep this code
|
||
enabled. Because we can get called from
|
||
check_stub_method, if we don't handle nested types then
|
||
it screws many operations in any program which uses
|
||
nested types. */
|
||
/* In "A::x", if x is a member function of A and there
|
||
happens to be a type (nested or not, since the stabs
|
||
don't make that distinction) named x, then this code
|
||
incorrectly thinks we are dealing with nested types
|
||
rather than a member function. */
|
||
|
||
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 *ncopy = alloca (strlen (tmp) +
|
||
strlen (namestart) + 3);
|
||
char *tmp1;
|
||
|
||
tmp1 = ncopy;
|
||
memcpy (tmp1, tmp, strlen (tmp));
|
||
tmp1 += strlen (tmp);
|
||
memcpy (tmp1, "::", 2);
|
||
tmp1 += 2;
|
||
memcpy (tmp1, namestart, p - namestart);
|
||
tmp1[p - namestart] = '\0';
|
||
cur_sym = lookup_symbol (ncopy,
|
||
expression_context_block,
|
||
VAR_DOMAIN, (int *) 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);
|
||
#else /* not 0 */
|
||
yylval.tsym.type = SYMBOL_TYPE (sym);
|
||
#endif /* not 0 */
|
||
return TYPENAME;
|
||
}
|
||
yylval.tsym.type
|
||
= language_lookup_primitive_type_by_name (parse_language,
|
||
parse_gdbarch, tmp);
|
||
if (yylval.tsym.type != NULL)
|
||
return TYPENAME;
|
||
|
||
/* See if it's an ObjC classname. */
|
||
if (!sym)
|
||
{
|
||
CORE_ADDR Class = lookup_objc_class (parse_gdbarch, tmp);
|
||
if (Class)
|
||
{
|
||
yylval.class.class = Class;
|
||
if ((sym = lookup_struct_typedef (tmp,
|
||
expression_context_block,
|
||
1)))
|
||
yylval.class.type = SYMBOL_TYPE (sym);
|
||
return CLASSNAME;
|
||
}
|
||
}
|
||
|
||
/* 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;
|
||
{
|
||
if (*lexptr == '\0')
|
||
error("A %s near end of expression.", (msg ? msg : "error"));
|
||
else
|
||
error ("A %s in expression, near `%s'.", (msg ? msg : "error"),
|
||
lexptr);
|
||
}
|