1 /* Parser definitions for GDB.
2 Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
3 Modified from expread.y by the Department of Computer Science at the
4 State University of New York at Buffalo.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #if !defined (PARSER_DEFS_H)
23 #define PARSER_DEFS_H 1
30 extern struct std_regs std_regs
[];
31 extern unsigned num_std_regs
;
33 struct expression
*expout
;
37 /* If this is nonzero, this block is used as the lexical context
40 struct block
*expression_context_block
;
42 /* The innermost context required by the stack and register variables
43 we've encountered so far. */
44 struct block
*innermost_block
;
46 /* The block in which the most recently discovered symbol was found. */
47 struct block
*block_found
;
49 /* Number of arguments seen so far in innermost function call. */
52 /* A string token, either a char-string or bit-string. Char-strings are
53 used, for example, for the names of symbols. */
57 /* Pointer to first byte of char-string or first bit of bit-string */
59 /* Length of string in bytes for char-string or bits for bit-string */
73 int is_a_field_of_this
;
76 /* For parsing of complicated types.
77 An array should be preceded in the list by the size of the array. */
79 {tp_end
= -1, tp_pointer
, tp_reference
, tp_array
, tp_function
};
80 /* The stack can contain either an enum type_pieces or an int. */
81 union type_stack_elt
{
82 enum type_pieces piece
;
85 union type_stack_elt
*type_stack
;
86 int type_stack_depth
, type_stack_size
;
89 write_exp_elt
PARAMS ((union exp_element
));
92 write_exp_elt_opcode
PARAMS ((enum exp_opcode
));
95 write_exp_elt_sym
PARAMS ((struct symbol
*));
98 write_exp_elt_longcst
PARAMS ((LONGEST
));
101 write_exp_elt_dblcst
PARAMS ((double));
104 write_exp_elt_type
PARAMS ((struct type
*));
107 write_exp_elt_intern
PARAMS ((struct internalvar
*));
110 write_exp_string
PARAMS ((struct stoken
));
113 write_exp_bitstring
PARAMS ((struct stoken
));
116 start_arglist
PARAMS ((void));
119 end_arglist
PARAMS ((void));
122 copy_name
PARAMS ((struct stoken
));
125 push_type
PARAMS ((enum type_pieces
));
128 push_type_int
PARAMS ((int));
130 extern enum type_pieces
131 pop_type
PARAMS ((void));
134 pop_type_int
PARAMS ((void));
136 /* During parsing of a C expression, the pointer to the next character
137 is in this variable. */
141 /* Tokens that refer to names do so with explicit pointer and length,
142 so they can share the storage that lexptr is parsing.
144 When it is necessary to pass a name to a function that expects
145 a null-terminated string, the substring is copied out
146 into a block of storage that namecopy points to.
148 namecopy is allocated once, guaranteed big enough, for each parsing. */
152 /* Current depth in parentheses within the expression. */
156 /* Nonzero means stop parsing on first comma (if not within parentheses). */
158 int comma_terminates
;
160 /* These codes indicate operator precedences for expression printing,
161 least tightly binding first. */
162 /* Adding 1 to a precedence value is done for binary operators,
163 on the operand which is more tightly bound, so that operators
164 of equal precedence within that operand will get parentheses. */
165 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
166 they are used as the "surrounding precedence" to force
167 various kinds of things to be parenthesized. */
169 { PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_LOGICAL_OR
,
170 PREC_LOGICAL_AND
, PREC_BITWISE_IOR
, PREC_BITWISE_AND
, PREC_BITWISE_XOR
,
171 PREC_EQUAL
, PREC_ORDER
, PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
172 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
};
174 /* Table mapping opcodes into strings for printing operators
175 and precedences of the operators. */
180 enum exp_opcode opcode
;
181 /* Precedence of operator. These values are used only by comparisons. */
182 enum precedence precedence
;
186 #endif /* PARSER_DEFS_H */
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