1637 lines
42 KiB
Plaintext
1637 lines
42 KiB
Plaintext
/* YACC parser for D expressions, for GDB.
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Copyright (C) 2014 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 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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/* This file is derived from c-exp.y, jv-exp.y. */
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/* Parse a D 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 <ctype.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 "d-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 "charset.h"
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#include "block.h"
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#define parse_type(ps) builtin_type (parse_gdbarch (ps))
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#define parse_d_type(ps) builtin_d_type (parse_gdbarch (ps))
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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 d_maxdepth
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#define yyparse d_parse_internal
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#define yylex d_lex
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#define yyerror d_error
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#define yylval d_lval
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#define yychar d_char
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#define yydebug d_debug
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#define yypact d_pact
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#define yyr1 d_r1
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#define yyr2 d_r2
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#define yydef d_def
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#define yychk d_chk
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#define yypgo d_pgo
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#define yyact d_act
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#define yyexca d_exca
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#define yyerrflag d_errflag
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#define yynerrs d_nerrs
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#define yyps d_ps
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#define yypv d_pv
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#define yys d_s
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#define yy_yys d_yys
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#define yystate d_state
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#define yytmp d_tmp
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#define yyv d_v
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#define yy_yyv d_yyv
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#define yyval d_val
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#define yylloc d_lloc
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#define yyreds d_reds /* With YYDEBUG defined */
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#define yytoks d_toks /* With YYDEBUG defined */
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#define yyname d_name /* With YYDEBUG defined */
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#define yyrule d_rule /* With YYDEBUG defined */
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#define yylhs d_yylhs
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#define yylen d_yylen
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#define yydefre d_yydefred
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#define yydgoto d_yydgoto
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#define yysindex d_yysindex
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#define yyrindex d_yyrindex
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#define yygindex d_yygindex
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#define yytable d_yytable
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#define yycheck d_yycheck
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#define yyss d_yyss
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#define yysslim d_yysslim
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#define yyssp d_yyssp
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#define yystacksize d_yystacksize
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#define yyvs d_yyvs
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#define yyvsp d_yyvsp
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#ifndef YYDEBUG
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#define YYDEBUG 1 /* Default to yydebug support */
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#endif
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#define YYFPRINTF parser_fprintf
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/* The state of the parser, used internally when we are parsing the
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expression. */
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static struct parser_state *pstate = NULL;
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int yyparse (void);
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static int yylex (void);
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void 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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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 typed_stoken tsval;
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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 ival;
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struct block *bval;
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enum exp_opcode opcode;
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struct stoken_vector svec;
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}
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%{
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/* YYSTYPE gets defined by %union */
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static int parse_number (struct parser_state *, const char *,
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int, int, YYSTYPE *);
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static void push_expression_name (struct parser_state *, struct stoken);
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%}
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%token <sval> IDENTIFIER
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%token <tsym> TYPENAME
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%token <voidval> COMPLETE
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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 <sval> NAME_OR_INT
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%token <typed_val_int> INTEGER_LITERAL
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%token <typed_val_float> FLOAT_LITERAL
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%token <tsval> CHARACTER_LITERAL
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%token <tsval> STRING_LITERAL
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%type <svec> StringExp
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%type <tval> BasicType TypeExp
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%type <sval> IdentifierExp
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%type <ival> ArrayLiteral
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%token ENTRY
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%token ERROR
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/* Keywords that have a constant value. */
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%token TRUE_KEYWORD FALSE_KEYWORD NULL_KEYWORD
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/* Class 'super' accessor. */
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%token SUPER_KEYWORD
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/* Properties. */
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%token CAST_KEYWORD SIZEOF_KEYWORD
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%token TYPEOF_KEYWORD TYPEID_KEYWORD
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%token INIT_KEYWORD
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/* Comparison keywords. */
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/* Type storage classes. */
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%token IMMUTABLE_KEYWORD CONST_KEYWORD SHARED_KEYWORD
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/* Non-scalar type keywords. */
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%token STRUCT_KEYWORD UNION_KEYWORD
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%token CLASS_KEYWORD INTERFACE_KEYWORD
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%token ENUM_KEYWORD TEMPLATE_KEYWORD
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%token DELEGATE_KEYWORD FUNCTION_KEYWORD
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%token <sval> DOLLAR_VARIABLE
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%token <opcode> ASSIGN_MODIFY
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%left ','
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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 '<' '>' LEQ GEQ
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%right LSH RSH
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%left '+' '-'
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%left '*' '/' '%'
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%right HATHAT
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%left IDENTITY NOTIDENTITY
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%right INCREMENT DECREMENT
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%right '.' '[' '('
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%token DOTDOT
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%%
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start :
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Expression
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| TypeExp
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;
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/* Expressions, including the comma operator. */
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Expression:
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CommaExpression
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;
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CommaExpression:
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AssignExpression
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| AssignExpression ',' CommaExpression
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{ write_exp_elt_opcode (pstate, BINOP_COMMA); }
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;
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AssignExpression:
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ConditionalExpression
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| ConditionalExpression '=' AssignExpression
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{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
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| ConditionalExpression ASSIGN_MODIFY AssignExpression
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{ write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
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write_exp_elt_opcode (pstate, $2);
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write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); }
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;
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ConditionalExpression:
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OrOrExpression
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| OrOrExpression '?' Expression ':' ConditionalExpression
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{ write_exp_elt_opcode (pstate, TERNOP_COND); }
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;
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OrOrExpression:
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AndAndExpression
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| OrOrExpression OROR AndAndExpression
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
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;
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AndAndExpression:
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OrExpression
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| AndAndExpression ANDAND OrExpression
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
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;
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OrExpression:
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XorExpression
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| OrExpression '|' XorExpression
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
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;
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XorExpression:
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AndExpression
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| XorExpression '^' AndExpression
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
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;
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AndExpression:
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CmpExpression
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| AndExpression '&' CmpExpression
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
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;
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CmpExpression:
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ShiftExpression
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| EqualExpression
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| IdentityExpression
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| RelExpression
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;
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EqualExpression:
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ShiftExpression EQUAL ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_EQUAL); }
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| ShiftExpression NOTEQUAL ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
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;
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IdentityExpression:
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ShiftExpression IDENTITY ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_EQUAL); }
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| ShiftExpression NOTIDENTITY ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
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;
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RelExpression:
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ShiftExpression '<' ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_LESS); }
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| ShiftExpression LEQ ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_LEQ); }
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| ShiftExpression '>' ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_GTR); }
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| ShiftExpression GEQ ShiftExpression
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{ write_exp_elt_opcode (pstate, BINOP_GEQ); }
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;
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ShiftExpression:
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AddExpression
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| ShiftExpression LSH AddExpression
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{ write_exp_elt_opcode (pstate, BINOP_LSH); }
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| ShiftExpression RSH AddExpression
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{ write_exp_elt_opcode (pstate, BINOP_RSH); }
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;
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AddExpression:
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MulExpression
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| AddExpression '+' MulExpression
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{ write_exp_elt_opcode (pstate, BINOP_ADD); }
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| AddExpression '-' MulExpression
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{ write_exp_elt_opcode (pstate, BINOP_SUB); }
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| AddExpression '~' MulExpression
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{ write_exp_elt_opcode (pstate, BINOP_CONCAT); }
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;
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MulExpression:
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UnaryExpression
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| MulExpression '*' UnaryExpression
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{ write_exp_elt_opcode (pstate, BINOP_MUL); }
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| MulExpression '/' UnaryExpression
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{ write_exp_elt_opcode (pstate, BINOP_DIV); }
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| MulExpression '%' UnaryExpression
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{ write_exp_elt_opcode (pstate, BINOP_REM); }
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UnaryExpression:
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'&' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_ADDR); }
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| INCREMENT UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
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| DECREMENT UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
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| '*' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_IND); }
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| '-' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_NEG); }
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| '+' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_PLUS); }
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| '!' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
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| '~' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
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| CastExpression
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| PowExpression
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;
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CastExpression:
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CAST_KEYWORD '(' TypeExp ')' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate, $3);
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write_exp_elt_opcode (pstate, UNOP_CAST); }
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/* C style cast is illegal D, but is still recognised in
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the grammar, so we keep this around for convenience. */
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| '(' TypeExp ')' UnaryExpression
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{ write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate, $2);
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write_exp_elt_opcode (pstate, UNOP_CAST); }
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;
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PowExpression:
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PostfixExpression
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| PostfixExpression HATHAT UnaryExpression
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{ write_exp_elt_opcode (pstate, BINOP_EXP); }
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;
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PostfixExpression:
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PrimaryExpression
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| PostfixExpression INCREMENT
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{ write_exp_elt_opcode (pstate, UNOP_POSTINCREMENT); }
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| PostfixExpression DECREMENT
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{ write_exp_elt_opcode (pstate, UNOP_POSTDECREMENT); }
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| CallExpression
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| IndexExpression
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| SliceExpression
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;
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ArgumentList:
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AssignExpression
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{ arglist_len = 1; }
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| ArgumentList ',' AssignExpression
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{ arglist_len++; }
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;
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ArgumentList_opt:
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/* EMPTY */
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{ arglist_len = 0; }
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| ArgumentList
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;
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CallExpression:
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PostfixExpression '('
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{ start_arglist (); }
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ArgumentList_opt ')'
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{ write_exp_elt_opcode (pstate, OP_FUNCALL);
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write_exp_elt_longcst (pstate, (LONGEST) end_arglist ());
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write_exp_elt_opcode (pstate, OP_FUNCALL); }
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;
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IndexExpression:
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PostfixExpression '[' ArgumentList ']'
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{ if (arglist_len > 0)
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{
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write_exp_elt_opcode (pstate, MULTI_SUBSCRIPT);
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write_exp_elt_longcst (pstate, (LONGEST) arglist_len);
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write_exp_elt_opcode (pstate, MULTI_SUBSCRIPT);
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}
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else
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write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT);
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}
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;
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SliceExpression:
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PostfixExpression '[' ']'
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{ /* Do nothing. */ }
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| PostfixExpression '[' AssignExpression DOTDOT AssignExpression ']'
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{ write_exp_elt_opcode (pstate, TERNOP_SLICE); }
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;
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PrimaryExpression:
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'(' Expression ')'
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{ /* Do nothing. */ }
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| IdentifierExp
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{ push_expression_name (pstate, $1); }
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| IdentifierExp '.' COMPLETE
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{ struct stoken s;
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s.ptr = "";
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s.length = 0;
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push_expression_name (pstate, $1);
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mark_struct_expression (pstate);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, s);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
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| IdentifierExp '.' IDENTIFIER COMPLETE
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{ push_expression_name (pstate, $1);
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mark_struct_expression (pstate);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, $3);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
|
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| DOLLAR_VARIABLE
|
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{ write_dollar_variable (pstate, $1); }
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||
| NAME_OR_INT
|
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{ YYSTYPE val;
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||
parse_number (pstate, $1.ptr, $1.length, 0, &val);
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write_exp_elt_opcode (pstate, OP_LONG);
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write_exp_elt_type (pstate, val.typed_val_int.type);
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write_exp_elt_longcst (pstate,
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(LONGEST) val.typed_val_int.val);
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write_exp_elt_opcode (pstate, OP_LONG); }
|
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| NULL_KEYWORD
|
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{ struct type *type = parse_d_type (pstate)->builtin_void;
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type = lookup_pointer_type (type);
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write_exp_elt_opcode (pstate, OP_LONG);
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write_exp_elt_type (pstate, type);
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write_exp_elt_longcst (pstate, (LONGEST) 0);
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write_exp_elt_opcode (pstate, OP_LONG); }
|
||
| TRUE_KEYWORD
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{ write_exp_elt_opcode (pstate, OP_BOOL);
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write_exp_elt_longcst (pstate, (LONGEST) 1);
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write_exp_elt_opcode (pstate, OP_BOOL); }
|
||
| FALSE_KEYWORD
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||
{ write_exp_elt_opcode (pstate, OP_BOOL);
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write_exp_elt_longcst (pstate, (LONGEST) 0);
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write_exp_elt_opcode (pstate, OP_BOOL); }
|
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| INTEGER_LITERAL
|
||
{ write_exp_elt_opcode (pstate, OP_LONG);
|
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write_exp_elt_type (pstate, $1.type);
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write_exp_elt_longcst (pstate, (LONGEST)($1.val));
|
||
write_exp_elt_opcode (pstate, OP_LONG); }
|
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| FLOAT_LITERAL
|
||
{ write_exp_elt_opcode (pstate, OP_DOUBLE);
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write_exp_elt_type (pstate, $1.type);
|
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write_exp_elt_dblcst (pstate, $1.dval);
|
||
write_exp_elt_opcode (pstate, OP_DOUBLE); }
|
||
| CHARACTER_LITERAL
|
||
{ struct stoken_vector vec;
|
||
vec.len = 1;
|
||
vec.tokens = &$1;
|
||
write_exp_string_vector (pstate, $1.type, &vec); }
|
||
| StringExp
|
||
{ int i;
|
||
write_exp_string_vector (pstate, 0, &$1);
|
||
for (i = 0; i < $1.len; ++i)
|
||
free ($1.tokens[i].ptr);
|
||
free ($1.tokens); }
|
||
| ArrayLiteral
|
||
{ write_exp_elt_opcode (pstate, OP_ARRAY);
|
||
write_exp_elt_longcst (pstate, (LONGEST) 0);
|
||
write_exp_elt_longcst (pstate, (LONGEST) $1 - 1);
|
||
write_exp_elt_opcode (pstate, OP_ARRAY); }
|
||
;
|
||
|
||
ArrayLiteral:
|
||
'[' ArgumentList_opt ']'
|
||
{ $$ = arglist_len; }
|
||
;
|
||
|
||
IdentifierExp:
|
||
IDENTIFIER
|
||
| IdentifierExp '.' IDENTIFIER
|
||
{ $$.length = $1.length + $3.length + 1;
|
||
if ($1.ptr + $1.length + 1 == $3.ptr
|
||
&& $1.ptr[$1.length] == '.')
|
||
$$.ptr = $1.ptr; /* Optimization. */
|
||
else
|
||
{
|
||
char *buf = malloc ($$.length + 1);
|
||
make_cleanup (free, buf);
|
||
sprintf (buf, "%.*s.%.*s",
|
||
$1.length, $1.ptr, $3.length, $3.ptr);
|
||
$$.ptr = buf;
|
||
}
|
||
}
|
||
;
|
||
|
||
StringExp:
|
||
STRING_LITERAL
|
||
{ /* We copy the string here, and not in the
|
||
lexer, to guarantee that we do not leak a
|
||
string. Note that we follow the
|
||
NUL-termination convention of the
|
||
lexer. */
|
||
struct typed_stoken *vec = XNEW (struct typed_stoken);
|
||
$$.len = 1;
|
||
$$.tokens = vec;
|
||
|
||
vec->type = $1.type;
|
||
vec->length = $1.length;
|
||
vec->ptr = malloc ($1.length + 1);
|
||
memcpy (vec->ptr, $1.ptr, $1.length + 1);
|
||
}
|
||
| StringExp STRING_LITERAL
|
||
{ /* Note that we NUL-terminate here, but just
|
||
for convenience. */
|
||
char *p;
|
||
++$$.len;
|
||
$$.tokens = realloc ($$.tokens,
|
||
$$.len * sizeof (struct typed_stoken));
|
||
|
||
p = malloc ($2.length + 1);
|
||
memcpy (p, $2.ptr, $2.length + 1);
|
||
|
||
$$.tokens[$$.len - 1].type = $2.type;
|
||
$$.tokens[$$.len - 1].length = $2.length;
|
||
$$.tokens[$$.len - 1].ptr = p;
|
||
}
|
||
;
|
||
|
||
TypeExp:
|
||
BasicType
|
||
{ write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate, $1);
|
||
write_exp_elt_opcode (pstate, OP_TYPE); }
|
||
| BasicType BasicType2
|
||
{ $$ = follow_types ($1);
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate, $$);
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
}
|
||
;
|
||
|
||
BasicType2:
|
||
'*'
|
||
{ push_type (tp_pointer); }
|
||
| '*' BasicType2
|
||
{ push_type (tp_pointer); }
|
||
| '[' INTEGER_LITERAL ']'
|
||
{ push_type_int ($2.val);
|
||
push_type (tp_array); }
|
||
| '[' INTEGER_LITERAL ']' BasicType2
|
||
{ push_type_int ($2.val);
|
||
push_type (tp_array); }
|
||
;
|
||
|
||
BasicType:
|
||
TYPENAME
|
||
{ $$ = $1.type; }
|
||
| CLASS_KEYWORD IdentifierExp
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| CLASS_KEYWORD COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
|
||
$$ = NULL; }
|
||
| CLASS_KEYWORD IdentifierExp COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr, $2.length);
|
||
$$ = NULL; }
|
||
| STRUCT_KEYWORD IdentifierExp
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| STRUCT_KEYWORD COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_STRUCT, "", 0);
|
||
$$ = NULL; }
|
||
| STRUCT_KEYWORD IdentifierExp COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_STRUCT, $2.ptr, $2.length);
|
||
$$ = NULL; }
|
||
| UNION_KEYWORD IdentifierExp
|
||
{ $$ = lookup_union (copy_name ($2),
|
||
expression_context_block); }
|
||
| UNION_KEYWORD COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_UNION, "", 0);
|
||
$$ = NULL; }
|
||
| UNION_KEYWORD IdentifierExp COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_UNION, $2.ptr, $2.length);
|
||
$$ = NULL; }
|
||
| ENUM_KEYWORD IdentifierExp
|
||
{ $$ = lookup_enum (copy_name ($2),
|
||
expression_context_block); }
|
||
| ENUM_KEYWORD COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_ENUM, "", 0);
|
||
$$ = NULL; }
|
||
| ENUM_KEYWORD IdentifierExp COMPLETE
|
||
{ mark_completion_tag (TYPE_CODE_ENUM, $2.ptr, $2.length);
|
||
$$ = NULL; }
|
||
;
|
||
|
||
%%
|
||
|
||
/* Take care of parsing a number (anything that starts with a digit).
|
||
Set yylval and return the token type; update lexptr.
|
||
LEN is the number of characters in it. */
|
||
|
||
/*** Needs some error checking for the float case ***/
|
||
|
||
static int
|
||
parse_number (struct parser_state *ps, const char *p,
|
||
int len, int parsed_float, YYSTYPE *putithere)
|
||
{
|
||
ULONGEST n = 0;
|
||
ULONGEST prevn = 0;
|
||
ULONGEST un;
|
||
|
||
int i = 0;
|
||
int c;
|
||
int base = input_radix;
|
||
int unsigned_p = 0;
|
||
int long_p = 0;
|
||
|
||
/* We have found a "L" or "U" suffix. */
|
||
int found_suffix = 0;
|
||
|
||
ULONGEST high_bit;
|
||
struct type *signed_type;
|
||
struct type *unsigned_type;
|
||
|
||
if (parsed_float)
|
||
{
|
||
const struct builtin_d_type *builtin_d_types;
|
||
const char *suffix;
|
||
int suffix_len;
|
||
char *s, *sp;
|
||
|
||
/* Strip out all embedded '_' before passing to parse_float. */
|
||
s = (char *) alloca (len + 1);
|
||
sp = s;
|
||
while (len-- > 0)
|
||
{
|
||
if (*p != '_')
|
||
*sp++ = *p;
|
||
p++;
|
||
}
|
||
*sp = '\0';
|
||
len = strlen (s);
|
||
|
||
if (! parse_float (s, len, &putithere->typed_val_float.dval, &suffix))
|
||
return ERROR;
|
||
|
||
suffix_len = s + len - suffix;
|
||
|
||
if (suffix_len == 0)
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_double;
|
||
}
|
||
else if (suffix_len == 1)
|
||
{
|
||
/* Check suffix for `f', `l', or `i' (float, real, or idouble). */
|
||
if (tolower (*suffix) == 'f')
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_float;
|
||
}
|
||
else if (tolower (*suffix) == 'l')
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_real;
|
||
}
|
||
else if (tolower (*suffix) == 'i')
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_idouble;
|
||
}
|
||
else
|
||
return ERROR;
|
||
}
|
||
else if (suffix_len == 2)
|
||
{
|
||
/* Check suffix for `fi' or `li' (ifloat or ireal). */
|
||
if (tolower (suffix[0]) == 'f' && tolower (suffix[1] == 'i'))
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_ifloat;
|
||
}
|
||
else if (tolower (suffix[0]) == 'l' && tolower (suffix[1] == 'i'))
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_d_type (ps)->builtin_ireal;
|
||
}
|
||
else
|
||
return ERROR;
|
||
}
|
||
else
|
||
return ERROR;
|
||
|
||
return FLOAT_LITERAL;
|
||
}
|
||
|
||
/* Handle base-switching prefixes 0x, 0b, 0 */
|
||
if (p[0] == '0')
|
||
switch (p[1])
|
||
{
|
||
case 'x':
|
||
case 'X':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 16;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
case 'b':
|
||
case 'B':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 2;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
base = 8;
|
||
break;
|
||
}
|
||
|
||
while (len-- > 0)
|
||
{
|
||
c = *p++;
|
||
if (c == '_')
|
||
continue; /* Ignore embedded '_'. */
|
||
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 == 0)
|
||
{
|
||
long_p = 1;
|
||
found_suffix = 1;
|
||
}
|
||
else if (c == 'u' && unsigned_p == 0)
|
||
{
|
||
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 integer overflow. */
|
||
if (c != 'l' && c != 'u')
|
||
{
|
||
ULONGEST n2 = prevn * base;
|
||
if ((n2 / base != prevn) || (n2 + i < prevn))
|
||
error (_("Numeric constant too large."));
|
||
}
|
||
prevn = n;
|
||
}
|
||
|
||
/* An integer constant is an int or a long. An L suffix forces it to
|
||
be long, and a U suffix forces it to be unsigned. 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). To deal with the case
|
||
where it is we just always shift the value more than once, with fewer
|
||
bits each time. */
|
||
un = (ULONGEST) n >> 2;
|
||
if (long_p == 0 && (un >> 30) == 0)
|
||
{
|
||
high_bit = ((ULONGEST) 1) << 31;
|
||
signed_type = parse_d_type (ps)->builtin_int;
|
||
/* For decimal notation, keep the sign of the worked out type. */
|
||
if (base == 10 && !unsigned_p)
|
||
unsigned_type = parse_d_type (ps)->builtin_long;
|
||
else
|
||
unsigned_type = parse_d_type (ps)->builtin_uint;
|
||
}
|
||
else
|
||
{
|
||
int shift;
|
||
if (sizeof (ULONGEST) * HOST_CHAR_BIT < 64)
|
||
/* A long long does not fit in a LONGEST. */
|
||
shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
|
||
else
|
||
shift = 63;
|
||
high_bit = (ULONGEST) 1 << shift;
|
||
signed_type = parse_d_type (ps)->builtin_long;
|
||
unsigned_type = parse_d_type (ps)->builtin_ulong;
|
||
}
|
||
|
||
putithere->typed_val_int.val = n;
|
||
|
||
/* If the high bit of the worked out type is set then this number
|
||
has to be unsigned_type. */
|
||
if (unsigned_p || (n & high_bit))
|
||
putithere->typed_val_int.type = unsigned_type;
|
||
else
|
||
putithere->typed_val_int.type = signed_type;
|
||
|
||
return INTEGER_LITERAL;
|
||
}
|
||
|
||
/* Temporary obstack used for holding strings. */
|
||
static struct obstack tempbuf;
|
||
static int tempbuf_init;
|
||
|
||
/* Parse a string or character literal from TOKPTR. The string or
|
||
character may be wide or unicode. *OUTPTR is set to just after the
|
||
end of the literal in the input string. The resulting token is
|
||
stored in VALUE. This returns a token value, either STRING or
|
||
CHAR, depending on what was parsed. *HOST_CHARS is set to the
|
||
number of host characters in the literal. */
|
||
|
||
static int
|
||
parse_string_or_char (const char *tokptr, const char **outptr,
|
||
struct typed_stoken *value, int *host_chars)
|
||
{
|
||
int quote;
|
||
|
||
/* Build the gdb internal form of the input string in tempbuf. Note
|
||
that the buffer is null byte terminated *only* for the
|
||
convenience of debugging gdb itself and printing the buffer
|
||
contents when the buffer contains no embedded nulls. Gdb does
|
||
not depend upon the buffer being null byte terminated, it uses
|
||
the length string instead. This allows gdb to handle C strings
|
||
(as well as strings in other languages) with embedded null
|
||
bytes */
|
||
|
||
if (!tempbuf_init)
|
||
tempbuf_init = 1;
|
||
else
|
||
obstack_free (&tempbuf, NULL);
|
||
obstack_init (&tempbuf);
|
||
|
||
/* Skip the quote. */
|
||
quote = *tokptr;
|
||
++tokptr;
|
||
|
||
*host_chars = 0;
|
||
|
||
while (*tokptr)
|
||
{
|
||
char c = *tokptr;
|
||
if (c == '\\')
|
||
{
|
||
++tokptr;
|
||
*host_chars += c_parse_escape (&tokptr, &tempbuf);
|
||
}
|
||
else if (c == quote)
|
||
break;
|
||
else
|
||
{
|
||
obstack_1grow (&tempbuf, c);
|
||
++tokptr;
|
||
/* FIXME: this does the wrong thing with multi-byte host
|
||
characters. We could use mbrlen here, but that would
|
||
make "set host-charset" a bit less useful. */
|
||
++*host_chars;
|
||
}
|
||
}
|
||
|
||
if (*tokptr != quote)
|
||
{
|
||
if (quote == '"' || quote == '`')
|
||
error (_("Unterminated string in expression."));
|
||
else
|
||
error (_("Unmatched single quote."));
|
||
}
|
||
++tokptr;
|
||
|
||
/* FIXME: should instead use own language string_type enum
|
||
and handle D-specific string suffixes here. */
|
||
if (quote == '\'')
|
||
value->type = C_CHAR;
|
||
else
|
||
value->type = C_STRING;
|
||
|
||
value->ptr = obstack_base (&tempbuf);
|
||
value->length = obstack_object_size (&tempbuf);
|
||
|
||
*outptr = tokptr;
|
||
|
||
return quote == '\'' ? CHARACTER_LITERAL : STRING_LITERAL;
|
||
}
|
||
|
||
struct token
|
||
{
|
||
char *operator;
|
||
int token;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
static const struct token tokentab3[] =
|
||
{
|
||
{"^^=", ASSIGN_MODIFY, BINOP_EXP},
|
||
{"<<=", ASSIGN_MODIFY, BINOP_LSH},
|
||
{">>=", ASSIGN_MODIFY, BINOP_RSH},
|
||
};
|
||
|
||
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},
|
||
{"&&", ANDAND, BINOP_END},
|
||
{"||", OROR, BINOP_END},
|
||
{"^^", HATHAT, BINOP_END},
|
||
{"<<", LSH, BINOP_END},
|
||
{">>", RSH, BINOP_END},
|
||
{"==", EQUAL, BINOP_END},
|
||
{"!=", NOTEQUAL, BINOP_END},
|
||
{"<=", LEQ, BINOP_END},
|
||
{">=", GEQ, BINOP_END},
|
||
{"..", DOTDOT, BINOP_END},
|
||
};
|
||
|
||
/* Identifier-like tokens. */
|
||
static const struct token ident_tokens[] =
|
||
{
|
||
{"is", IDENTITY, BINOP_END},
|
||
{"!is", NOTIDENTITY, BINOP_END},
|
||
|
||
{"cast", CAST_KEYWORD, OP_NULL},
|
||
{"const", CONST_KEYWORD, OP_NULL},
|
||
{"immutable", IMMUTABLE_KEYWORD, OP_NULL},
|
||
{"shared", SHARED_KEYWORD, OP_NULL},
|
||
{"super", SUPER_KEYWORD, OP_NULL},
|
||
|
||
{"null", NULL_KEYWORD, OP_NULL},
|
||
{"true", TRUE_KEYWORD, OP_NULL},
|
||
{"false", FALSE_KEYWORD, OP_NULL},
|
||
|
||
{"init", INIT_KEYWORD, OP_NULL},
|
||
{"sizeof", SIZEOF_KEYWORD, OP_NULL},
|
||
{"typeof", TYPEOF_KEYWORD, OP_NULL},
|
||
{"typeid", TYPEID_KEYWORD, OP_NULL},
|
||
|
||
{"delegate", DELEGATE_KEYWORD, OP_NULL},
|
||
{"function", FUNCTION_KEYWORD, OP_NULL},
|
||
{"struct", STRUCT_KEYWORD, OP_NULL},
|
||
{"union", UNION_KEYWORD, OP_NULL},
|
||
{"class", CLASS_KEYWORD, OP_NULL},
|
||
{"interface", INTERFACE_KEYWORD, OP_NULL},
|
||
{"enum", ENUM_KEYWORD, OP_NULL},
|
||
{"template", TEMPLATE_KEYWORD, OP_NULL},
|
||
};
|
||
|
||
/* If NAME is a type name in this scope, return it. */
|
||
|
||
static struct type *
|
||
d_type_from_name (struct stoken name)
|
||
{
|
||
struct symbol *sym;
|
||
char *copy = copy_name (name);
|
||
|
||
sym = lookup_symbol (copy, expression_context_block,
|
||
STRUCT_DOMAIN, NULL);
|
||
if (sym != NULL)
|
||
return SYMBOL_TYPE (sym);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* If NAME is a module name in this scope, return it. */
|
||
|
||
static struct type *
|
||
d_module_from_name (struct stoken name)
|
||
{
|
||
struct symbol *sym;
|
||
char *copy = copy_name (name);
|
||
|
||
sym = lookup_symbol (copy, expression_context_block,
|
||
MODULE_DOMAIN, NULL);
|
||
if (sym != NULL)
|
||
return SYMBOL_TYPE (sym);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* If NAME is a valid variable name in this scope, push it and return 1.
|
||
Otherwise, return 0. */
|
||
|
||
static int
|
||
push_variable (struct parser_state *ps, struct stoken name)
|
||
{
|
||
char *copy = copy_name (name);
|
||
struct field_of_this_result is_a_field_of_this;
|
||
struct symbol *sym;
|
||
sym = lookup_symbol (copy, expression_context_block, VAR_DOMAIN,
|
||
&is_a_field_of_this);
|
||
if (sym && SYMBOL_CLASS (sym) != LOC_TYPEDEF)
|
||
{
|
||
if (symbol_read_needs_frame (sym))
|
||
{
|
||
if (innermost_block == 0 ||
|
||
contained_in (block_found, innermost_block))
|
||
innermost_block = block_found;
|
||
}
|
||
|
||
write_exp_elt_opcode (ps, 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 (ps, NULL);
|
||
write_exp_elt_sym (ps, sym);
|
||
write_exp_elt_opcode (ps, OP_VAR_VALUE);
|
||
return 1;
|
||
}
|
||
if (is_a_field_of_this.type != NULL)
|
||
{
|
||
/* 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 (ps, OP_THIS);
|
||
write_exp_elt_opcode (ps, OP_THIS);
|
||
write_exp_elt_opcode (ps, STRUCTOP_PTR);
|
||
write_exp_string (ps, name);
|
||
write_exp_elt_opcode (ps, STRUCTOP_PTR);
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Assuming a reference expression has been pushed, emit the
|
||
STRUCTOP_PTR ops to access the field named NAME. If NAME is a
|
||
qualified name (has '.'), generate a field access for each part. */
|
||
|
||
static void
|
||
push_fieldnames (struct parser_state *ps, struct stoken name)
|
||
{
|
||
int i;
|
||
struct stoken token;
|
||
token.ptr = name.ptr;
|
||
for (i = 0; ; i++)
|
||
{
|
||
if (i == name.length || name.ptr[i] == '.')
|
||
{
|
||
/* token.ptr is start of current field name. */
|
||
token.length = &name.ptr[i] - token.ptr;
|
||
write_exp_elt_opcode (ps, STRUCTOP_PTR);
|
||
write_exp_string (ps, token);
|
||
write_exp_elt_opcode (ps, STRUCTOP_PTR);
|
||
token.ptr += token.length + 1;
|
||
}
|
||
if (i >= name.length)
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Helper routine for push_expression_name. Handle a TYPE symbol,
|
||
where DOT_INDEX is the index of the first '.' if NAME is part of
|
||
a qualified type. */
|
||
|
||
static void
|
||
push_type_name (struct parser_state *ps, struct type *type,
|
||
struct stoken name, int dot_index)
|
||
{
|
||
if (dot_index == name.length)
|
||
{
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
write_exp_elt_type (ps, type);
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
}
|
||
else
|
||
{
|
||
struct stoken token;
|
||
|
||
token.ptr = name.ptr;
|
||
token.length = dot_index;
|
||
|
||
dot_index = 0;
|
||
|
||
while (dot_index < name.length && name.ptr[dot_index] != '.')
|
||
dot_index++;
|
||
token.ptr = name.ptr;
|
||
token.length = dot_index;
|
||
|
||
write_exp_elt_opcode (ps, OP_SCOPE);
|
||
write_exp_elt_type (ps, type);
|
||
write_exp_string (ps, token);
|
||
write_exp_elt_opcode (ps, OP_SCOPE);
|
||
|
||
if (dot_index < name.length)
|
||
{
|
||
dot_index++;
|
||
name.ptr += dot_index;
|
||
name.length -= dot_index;
|
||
push_fieldnames (ps, name);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Helper routine for push_expression_name. Like push_type_name,
|
||
but used when TYPE is a module. Returns 1 on pushing the symbol. */
|
||
|
||
static int
|
||
push_module_name (struct parser_state *ps, struct type *module,
|
||
struct stoken name, int dot_index)
|
||
{
|
||
if (dot_index == name.length)
|
||
{
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
write_exp_elt_type (ps, module);
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
return 1;
|
||
}
|
||
else
|
||
{
|
||
struct symbol *sym;
|
||
char *copy;
|
||
|
||
copy = copy_name (name);
|
||
sym = lookup_symbol_in_static_block (copy, expression_context_block,
|
||
VAR_DOMAIN);
|
||
if (sym != NULL)
|
||
sym = lookup_global_symbol (copy, expression_context_block,
|
||
VAR_DOMAIN);
|
||
|
||
if (sym != NULL)
|
||
{
|
||
if (SYMBOL_CLASS (sym) != LOC_TYPEDEF)
|
||
{
|
||
write_exp_elt_opcode (ps, OP_VAR_VALUE);
|
||
write_exp_elt_block (ps, NULL);
|
||
write_exp_elt_sym (ps, sym);
|
||
write_exp_elt_opcode (ps, OP_VAR_VALUE);
|
||
}
|
||
else
|
||
{
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
write_exp_elt_type (ps, SYMBOL_TYPE (sym));
|
||
write_exp_elt_opcode (ps, OP_TYPE);
|
||
}
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Handle NAME in an expression (or LHS), which could be a
|
||
variable, type, or module. */
|
||
|
||
static void
|
||
push_expression_name (struct parser_state *ps, struct stoken name)
|
||
{
|
||
struct stoken token;
|
||
struct type *typ;
|
||
struct bound_minimal_symbol msymbol;
|
||
char *copy;
|
||
int doti;
|
||
|
||
/* Handle VAR, which could be local or global. */
|
||
if (push_variable (ps, name) != 0)
|
||
return;
|
||
|
||
/* Handle MODULE. */
|
||
typ = d_module_from_name (name);
|
||
if (typ != NULL)
|
||
{
|
||
if (push_module_name (ps, typ, name, name.length) != 0)
|
||
return;
|
||
}
|
||
|
||
/* Handle TYPE. */
|
||
typ = d_type_from_name (name);
|
||
if (typ != NULL)
|
||
{
|
||
push_type_name (ps, typ, name, name.length);
|
||
return;
|
||
}
|
||
|
||
/* Handle VAR.FIELD1..FIELDN. */
|
||
for (doti = 0; doti < name.length; doti++)
|
||
{
|
||
if (name.ptr[doti] == '.')
|
||
{
|
||
token.ptr = name.ptr;
|
||
token.length = doti;
|
||
|
||
if (push_variable (ps, token) != 0)
|
||
{
|
||
token.ptr = name.ptr + doti + 1;
|
||
token.length = name.length - doti - 1;
|
||
push_fieldnames (ps, token);
|
||
return;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Continue looking if we found a '.' in the name. */
|
||
if (doti < name.length)
|
||
{
|
||
token.ptr = name.ptr;
|
||
for (;;)
|
||
{
|
||
token.length = doti;
|
||
|
||
/* Handle PACKAGE.MODULE. */
|
||
typ = d_module_from_name (token);
|
||
if (typ != NULL)
|
||
{
|
||
if (push_module_name (ps, typ, name, doti) != 0)
|
||
return;
|
||
}
|
||
/* Handle TYPE.FIELD1..FIELDN. */
|
||
typ = d_type_from_name (token);
|
||
if (typ != NULL)
|
||
{
|
||
push_type_name (ps, typ, name, doti);
|
||
return;
|
||
}
|
||
|
||
if (doti >= name.length)
|
||
break;
|
||
doti++; /* Skip '.' */
|
||
while (doti < name.length && name.ptr[doti] != '.')
|
||
doti++;
|
||
}
|
||
}
|
||
|
||
/* Lookup foreign name in global static symbols. */
|
||
copy = copy_name (name);
|
||
msymbol = lookup_bound_minimal_symbol (copy);
|
||
if (msymbol.minsym != NULL)
|
||
write_exp_msymbol (ps, 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);
|
||
}
|
||
|
||
/* This is set if a NAME token appeared at the very end of the input
|
||
string, with no whitespace separating the name from the EOF. This
|
||
is used only when parsing to do field name completion. */
|
||
static int saw_name_at_eof;
|
||
|
||
/* This is set if the previously-returned token was a structure operator.
|
||
This is used only when parsing to do field name completion. */
|
||
static int last_was_structop;
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int i;
|
||
const char *tokstart;
|
||
int saw_structop = last_was_structop;
|
||
char *copy;
|
||
|
||
last_was_structop = 0;
|
||
|
||
retry:
|
||
|
||
prev_lexptr = lexptr;
|
||
|
||
tokstart = lexptr;
|
||
/* See if it is a special token of length 3. */
|
||
for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
|
||
if (strncmp (tokstart, tokentab3[i].operator, 3) == 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;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
/* If we're parsing for field name completion, and the previous
|
||
token allows such completion, return a COMPLETE token.
|
||
Otherwise, we were already scanning the original text, and
|
||
we're really done. */
|
||
if (saw_name_at_eof)
|
||
{
|
||
saw_name_at_eof = 0;
|
||
return COMPLETE;
|
||
}
|
||
else if (saw_structop)
|
||
return COMPLETE;
|
||
else
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
lexptr++;
|
||
goto retry;
|
||
|
||
case '[':
|
||
case '(':
|
||
paren_depth++;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ']':
|
||
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')
|
||
{
|
||
if (parse_completion)
|
||
last_was_structop = 1;
|
||
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;
|
||
const char *p = tokstart;
|
||
int hex = input_radix > 10;
|
||
|
||
if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
|
||
{
|
||
p += 2;
|
||
hex = 1;
|
||
}
|
||
|
||
for (;; ++p)
|
||
{
|
||
/* Hex exponents start with 'p', 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 && tolower (p[0]) == 'e')
|
||
|| (hex && !got_e && tolower (p[0] == 'p')))
|
||
got_dot = got_e = 1;
|
||
/* A '.' always indicates a decimal floating point number
|
||
regardless of the radix. If we have a '..' then its the
|
||
end of the number and the beginning of a slice. */
|
||
else if (!got_dot && (p[0] == '.' && p[1] != '.'))
|
||
got_dot = 1;
|
||
/* This is the sign of the exponent, not the end of the number. */
|
||
else if (got_e && (tolower (p[-1]) == 'e' || tolower (p[-1]) == 'p')
|
||
&& (*p == '-' || *p == '+'))
|
||
continue;
|
||
/* We will take any letters or digits, ignoring any embedded '_'.
|
||
parse_number will complain if past the radix, or if L or U are
|
||
not final. */
|
||
else if ((*p < '0' || *p > '9') && (*p != '_') &&
|
||
((*p < 'a' || *p > 'z') && (*p < 'A' || *p > 'Z')))
|
||
break;
|
||
}
|
||
|
||
toktype = parse_number (pstate, 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 '@':
|
||
{
|
||
const char *p = &tokstart[1];
|
||
size_t len = strlen ("entry");
|
||
|
||
while (isspace (*p))
|
||
p++;
|
||
if (strncmp (p, "entry", len) == 0 && !isalnum (p[len])
|
||
&& p[len] != '_')
|
||
{
|
||
lexptr = &p[len];
|
||
return ENTRY;
|
||
}
|
||
}
|
||
/* FALLTHRU */
|
||
case '+':
|
||
case '-':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '|':
|
||
case '&':
|
||
case '^':
|
||
case '~':
|
||
case '!':
|
||
case '<':
|
||
case '>':
|
||
case '?':
|
||
case ':':
|
||
case '=':
|
||
case '{':
|
||
case '}':
|
||
symbol:
|
||
lexptr++;
|
||
return c;
|
||
|
||
case '\'':
|
||
case '"':
|
||
case '`':
|
||
{
|
||
int host_len;
|
||
int result = parse_string_or_char (tokstart, &lexptr, &yylval.tsval,
|
||
&host_len);
|
||
if (result == CHARACTER_LITERAL)
|
||
{
|
||
if (host_len == 0)
|
||
error (_("Empty character constant."));
|
||
else if (host_len > 2 && c == '\'')
|
||
{
|
||
++tokstart;
|
||
namelen = lexptr - tokstart - 1;
|
||
goto tryname;
|
||
}
|
||
else if (host_len > 1)
|
||
error (_("Invalid character constant."));
|
||
}
|
||
return result;
|
||
}
|
||
}
|
||
|
||
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;
|
||
|
||
/* For the same reason (breakpoint conditions), "thread N"
|
||
terminates the expression. "thread" could be an identifier, but
|
||
an identifier is never followed by a number without intervening
|
||
punctuation. "task" is similar. Handle abbreviations of these,
|
||
similarly to breakpoint.c:find_condition_and_thread. */
|
||
if (namelen >= 1
|
||
&& (strncmp (tokstart, "thread", namelen) == 0
|
||
|| strncmp (tokstart, "task", namelen) == 0)
|
||
&& (tokstart[namelen] == ' ' || tokstart[namelen] == '\t'))
|
||
{
|
||
const char *p = tokstart + namelen + 1;
|
||
|
||
while (*p == ' ' || *p == '\t')
|
||
p++;
|
||
if (*p >= '0' && *p <= '9')
|
||
return 0;
|
||
}
|
||
|
||
lexptr += namelen;
|
||
|
||
tryname:
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
/* Catch specific keywords. */
|
||
copy = copy_name (yylval.sval);
|
||
for (i = 0; i < sizeof ident_tokens / sizeof ident_tokens[0]; i++)
|
||
if (strcmp (copy, ident_tokens[i].operator) == 0)
|
||
{
|
||
/* It is ok to always set this, even though we don't always
|
||
strictly need to. */
|
||
yylval.opcode = ident_tokens[i].opcode;
|
||
return ident_tokens[i].token;
|
||
}
|
||
|
||
if (*tokstart == '$')
|
||
return DOLLAR_VARIABLE;
|
||
|
||
yylval.tsym.type
|
||
= language_lookup_primitive_type_by_name (parse_language (pstate),
|
||
parse_gdbarch (pstate), copy);
|
||
if (yylval.tsym.type != NULL)
|
||
return TYPENAME;
|
||
|
||
/* Input names that aren't symbols but ARE valid hex numbers,
|
||
when the input radix permits them, can be names or numbers
|
||
depending on the parse. Note we support radixes > 16 here. */
|
||
if ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
|
||
|| (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))
|
||
{
|
||
YYSTYPE newlval; /* Its value is ignored. */
|
||
int hextype = parse_number (pstate, tokstart, namelen, 0, &newlval);
|
||
if (hextype == INTEGER_LITERAL)
|
||
return NAME_OR_INT;
|
||
}
|
||
|
||
if (parse_completion && *lexptr == '\0')
|
||
saw_name_at_eof = 1;
|
||
|
||
return IDENTIFIER;
|
||
}
|
||
|
||
int
|
||
d_parse (struct parser_state *par_state)
|
||
{
|
||
int result;
|
||
struct cleanup *back_to;
|
||
|
||
/* Setting up the parser state. */
|
||
gdb_assert (par_state != NULL);
|
||
pstate = par_state;
|
||
|
||
back_to = make_cleanup (null_cleanup, NULL);
|
||
|
||
make_cleanup_restore_integer (&yydebug);
|
||
make_cleanup_clear_parser_state (&pstate);
|
||
yydebug = parser_debug;
|
||
|
||
/* Initialize some state used by the lexer. */
|
||
last_was_structop = 0;
|
||
saw_name_at_eof = 0;
|
||
|
||
result = yyparse ();
|
||
do_cleanups (back_to);
|
||
return result;
|
||
}
|
||
|
||
void
|
||
yyerror (char *msg)
|
||
{
|
||
if (prev_lexptr)
|
||
lexptr = prev_lexptr;
|
||
|
||
error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);
|
||
}
|
||
|