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. */
27 extern struct std_regs std_regs
[];
28 extern unsigned num_std_regs
;
30 struct expression
*expout
;
34 extern struct type
*init_type ();
36 void write_exp_elt ();
37 void write_exp_elt_opcode ();
38 void write_exp_elt_sym ();
39 void write_exp_elt_longcst ();
40 void write_exp_elt_dblcst ();
41 void write_exp_elt_type ();
42 void write_exp_elt_intern ();
43 void write_exp_string ();
44 void start_arglist ();
46 void free_funcalls ();
49 /* If this is nonzero, this block is used as the lexical context
52 struct block
*expression_context_block
;
54 /* The innermost context required by the stack and register variables
55 we've encountered so far. */
56 struct block
*innermost_block
;
58 /* The block in which the most recently discovered symbol was found. */
59 struct block
*block_found
;
61 /* Number of arguments seen so far in innermost function call. */
64 /* Data structure for saving values of arglist_len
65 for function calls whose arguments contain other function calls. */
73 struct funcall
*funcall_chain
;
75 /* This kind of datum is used to represent the name
94 int is_a_field_of_this
;
97 /* For parsing of complicated types.
98 An array should be preceded in the list by the size of the array. */
100 {tp_end
= -1, tp_pointer
, tp_reference
, tp_array
, tp_function
};
101 /* The stack can contain either an enum type_pieces or an int. */
102 union type_stack_elt
{
103 enum type_pieces piece
;
106 union type_stack_elt
*type_stack
;
107 int type_stack_depth
, type_stack_size
;
110 void push_type_int ();
111 enum type_pieces
pop_type ();
114 /* During parsing of a C expression, the pointer to the next character
115 is in this variable. */
119 /* Tokens that refer to names do so with explicit pointer and length,
120 so they can share the storage that lexptr is parsing.
122 When it is necessary to pass a name to a function that expects
123 a null-terminated string, the substring is copied out
124 into a block of storage that namecopy points to.
126 namecopy is allocated once, guaranteed big enough, for each parsing. */
130 /* Current depth in parentheses within the expression. */
134 /* Nonzero means stop parsing on first comma (if not within parentheses). */
136 int comma_terminates
;
138 /* These codes indicate operator precedences for expression printing,
139 least tightly binding first. */
140 /* Adding 1 to a precedence value is done for binary operators,
141 on the operand which is more tightly bound, so that operators
142 of equal precedence within that operand will get parentheses. */
143 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
144 they are used as the "surrounding precedence" to force
145 various kinds of things to be parenthesized. */
147 { PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_OR
, PREC_AND
,
148 PREC_LOGIOR
, PREC_LOGAND
, PREC_LOGXOR
, PREC_EQUAL
, PREC_ORDER
,
149 PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
150 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
};
152 /* Table mapping opcodes into strings for printing operators
153 and precedences of the operators. */
158 enum exp_opcode opcode
;
159 /* Precedence of operator. These values are used only by comparisons. */
160 enum precedence precedence
;
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