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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 extern struct expression
*expout
;
34 extern int expout_size
;
35 extern int expout_ptr
;
37 /* If this is nonzero, this block is used as the lexical context
40 extern struct block
*expression_context_block
;
42 /* The innermost context required by the stack and register variables
43 we've encountered so far. */
44 extern struct block
*innermost_block
;
46 /* The block in which the most recently discovered symbol was found.
47 FIXME: Should be declared along with lookup_symbol in symtab.h; is not
48 related specifically to parsing. */
49 extern struct block
*block_found
;
51 /* Number of arguments seen so far in innermost function call. */
52 extern int arglist_len
;
54 /* A string token, either a char-string or bit-string. Char-strings are
55 used, for example, for the names of symbols. */
59 /* Pointer to first byte of char-string or first bit of bit-string */
61 /* Length of string in bytes for char-string or bits for bit-string */
75 int is_a_field_of_this
;
78 /* For parsing of complicated types.
79 An array should be preceded in the list by the size of the array. */
81 {tp_end
= -1, tp_pointer
, tp_reference
, tp_array
, tp_function
};
82 /* The stack can contain either an enum type_pieces or an int. */
83 union type_stack_elt
{
84 enum type_pieces piece
;
87 extern union type_stack_elt
*type_stack
;
88 extern int type_stack_depth
, type_stack_size
;
90 extern void write_exp_elt
PARAMS ((union exp_element
));
92 extern void write_exp_elt_opcode
PARAMS ((enum exp_opcode
));
94 extern void write_exp_elt_sym
PARAMS ((struct symbol
*));
96 extern void write_exp_elt_longcst
PARAMS ((LONGEST
));
98 extern void write_exp_elt_dblcst
PARAMS ((DOUBLEST
));
100 extern void write_exp_elt_type
PARAMS ((struct type
*));
102 extern void write_exp_elt_intern
PARAMS ((struct internalvar
*));
104 extern void write_exp_string
PARAMS ((struct stoken
));
106 extern void write_exp_bitstring
PARAMS ((struct stoken
));
108 extern void write_exp_elt_block
PARAMS ((struct block
*));
110 extern void write_exp_msymbol
PARAMS ((struct minimal_symbol
*,
111 struct type
*, struct type
*));
113 extern void write_dollar_variable
PARAMS ((struct stoken str
));
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));
137 length_of_subexp
PARAMS ((struct expression
*, int));
139 extern struct type
*follow_types
PARAMS ((struct type
*));
141 /* During parsing of a C expression, the pointer to the next character
142 is in this variable. */
146 /* Tokens that refer to names do so with explicit pointer and length,
147 so they can share the storage that lexptr is parsing.
149 When it is necessary to pass a name to a function that expects
150 a null-terminated string, the substring is copied out
151 into a block of storage that namecopy points to.
153 namecopy is allocated once, guaranteed big enough, for each parsing. */
155 extern char *namecopy
;
157 /* Current depth in parentheses within the expression. */
159 extern int paren_depth
;
161 /* Nonzero means stop parsing on first comma (if not within parentheses). */
163 extern int comma_terminates
;
165 /* These codes indicate operator precedences for expression printing,
166 least tightly binding first. */
167 /* Adding 1 to a precedence value is done for binary operators,
168 on the operand which is more tightly bound, so that operators
169 of equal precedence within that operand will get parentheses. */
170 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
171 they are used as the "surrounding precedence" to force
172 various kinds of things to be parenthesized. */
174 { PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_LOGICAL_OR
,
175 PREC_LOGICAL_AND
, PREC_BITWISE_IOR
, PREC_BITWISE_AND
, PREC_BITWISE_XOR
,
176 PREC_EQUAL
, PREC_ORDER
, PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
177 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
, PREC_BUILTIN_FUNCTION
};
179 /* Table mapping opcodes into strings for printing operators
180 and precedences of the operators. */
185 enum exp_opcode opcode
;
186 /* Precedence of operator. These values are used only by comparisons. */
187 enum precedence precedence
;
189 /* For a binary operator: 1 iff right associate.
190 For a unary operator: 1 iff postfix. */
194 #endif /* PARSER_DEFS_H */
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