1 /* Parser definitions for GDB.
3 Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
4 1998, 1999, 2000, 2002, 2007, 2008 Free Software Foundation, Inc.
6 Modified from expread.y by the Department of Computer Science at the
7 State University of New York at Buffalo.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #if !defined (PARSER_DEFS_H)
25 #define PARSER_DEFS_H 1
31 extern struct expression
*expout
;
32 extern int expout_size
;
33 extern int expout_ptr
;
35 #define parse_gdbarch (expout->gdbarch)
36 #define parse_language (expout->language_defn)
38 /* If this is nonzero, this block is used as the lexical context
41 extern struct block
*expression_context_block
;
43 /* If expression_context_block is non-zero, then this is the PC within
44 the block that we want to evaluate expressions at. When debugging
45 C or C++ code, we use this to find the exact line we're at, and
46 then look up the macro definitions active at that point. */
47 extern CORE_ADDR expression_context_pc
;
49 /* The innermost context required by the stack and register variables
50 we've encountered so far. */
51 extern struct block
*innermost_block
;
53 /* The block in which the most recently discovered symbol was found.
54 FIXME: Should be declared along with lookup_symbol in symtab.h; is not
55 related specifically to parsing. */
56 extern struct block
*block_found
;
58 /* Number of arguments seen so far in innermost function call. */
59 extern int arglist_len
;
61 /* A string token, either a char-string or bit-string. Char-strings are
62 used, for example, for the names of symbols. */
66 /* Pointer to first byte of char-string or first bit of bit-string */
68 /* Length of string in bytes for char-string or bits for bit-string */
82 int is_a_field_of_this
;
93 /* For parsing of complicated types.
94 An array should be preceded in the list by the size of the array. */
106 /* The stack can contain either an enum type_pieces or an int. */
109 enum type_pieces piece
;
112 extern union type_stack_elt
*type_stack
;
113 extern int type_stack_depth
, type_stack_size
;
115 extern void write_exp_elt (union exp_element
);
117 extern void write_exp_elt_opcode (enum exp_opcode
);
119 extern void write_exp_elt_sym (struct symbol
*);
121 extern void write_exp_elt_longcst (LONGEST
);
123 extern void write_exp_elt_dblcst (DOUBLEST
);
125 extern void write_exp_elt_decfloatcst (gdb_byte
*);
127 extern void write_exp_elt_type (struct type
*);
129 extern void write_exp_elt_intern (struct internalvar
*);
131 extern void write_exp_string (struct stoken
);
133 extern void write_exp_bitstring (struct stoken
);
135 extern void write_exp_elt_block (struct block
*);
137 extern void write_exp_elt_objfile (struct objfile
*objfile
);
139 extern void write_exp_msymbol (struct minimal_symbol
*);
141 extern void write_dollar_variable (struct stoken str
);
143 extern void mark_struct_expression (void);
145 extern char *find_template_name_end (char *);
147 extern void start_arglist (void);
149 extern int end_arglist (void);
151 extern char *copy_name (struct stoken
);
153 extern void push_type (enum type_pieces
);
155 extern void push_type_int (int);
157 extern void push_type_address_space (char *);
159 extern enum type_pieces
pop_type (void);
161 extern int pop_type_int (void);
163 extern int length_of_subexp (struct expression
*, int);
165 extern int dump_subexp (struct expression
*, struct ui_file
*, int);
167 extern int dump_subexp_body_standard (struct expression
*,
168 struct ui_file
*, int);
170 extern void operator_length (struct expression
*, int, int *, int *);
172 extern void operator_length_standard (struct expression
*, int, int *, int *);
174 extern char *op_name_standard (enum exp_opcode
);
176 extern struct type
*follow_types (struct type
*);
178 extern void null_post_parser (struct expression
**, int);
180 /* During parsing of a C expression, the pointer to the next character
181 is in this variable. */
185 /* After a token has been recognized, this variable points to it.
186 Currently used only for error reporting. */
187 extern char *prev_lexptr
;
189 /* Tokens that refer to names do so with explicit pointer and length,
190 so they can share the storage that lexptr is parsing.
192 When it is necessary to pass a name to a function that expects
193 a null-terminated string, the substring is copied out
194 into a block of storage that namecopy points to.
196 namecopy is allocated once, guaranteed big enough, for each parsing. */
198 extern char *namecopy
;
200 /* Current depth in parentheses within the expression. */
202 extern int paren_depth
;
204 /* Nonzero means stop parsing on first comma (if not within parentheses). */
206 extern int comma_terminates
;
208 /* These codes indicate operator precedences for expression printing,
209 least tightly binding first. */
210 /* Adding 1 to a precedence value is done for binary operators,
211 on the operand which is more tightly bound, so that operators
212 of equal precedence within that operand will get parentheses. */
213 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
214 they are used as the "surrounding precedence" to force
215 various kinds of things to be parenthesized. */
218 PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_LOGICAL_OR
,
219 PREC_LOGICAL_AND
, PREC_BITWISE_IOR
, PREC_BITWISE_AND
, PREC_BITWISE_XOR
,
220 PREC_EQUAL
, PREC_ORDER
, PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
221 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
, PREC_BUILTIN_FUNCTION
224 /* Table mapping opcodes into strings for printing operators
225 and precedences of the operators. */
230 enum exp_opcode opcode
;
231 /* Precedence of operator. These values are used only by comparisons. */
232 enum precedence precedence
;
234 /* For a binary operator: 1 iff right associate.
235 For a unary operator: 1 iff postfix. */
239 /* Information needed to print, prefixify, and evaluate expressions for
242 struct exp_descriptor
244 /* Print subexpression. */
245 void (*print_subexp
) (struct expression
*, int *, struct ui_file
*,
248 /* Returns number of exp_elements needed to represent an operator and
249 the number of subexpressions it takes. */
250 void (*operator_length
) (struct expression
*, int, int*, int *);
252 /* Name of this operator for dumping purposes. */
253 char *(*op_name
) (enum exp_opcode
);
255 /* Dump the rest of this (prefix) expression after the operator
256 itself has been printed. See dump_subexp_body_standard in
258 int (*dump_subexp_body
) (struct expression
*, struct ui_file
*, int);
260 /* Evaluate an expression. */
261 struct value
*(*evaluate_exp
) (struct type
*, struct expression
*,
266 /* Default descriptor containing standard definitions of all
268 extern const struct exp_descriptor exp_descriptor_standard
;
270 /* Functions used by language-specific extended operators to (recursively)
271 print/dump subexpressions. */
273 extern void print_subexp (struct expression
*, int *, struct ui_file
*,
276 extern void print_subexp_standard (struct expression
*, int *,
277 struct ui_file
*, enum precedence
);
279 /* Function used to avoid direct calls to fprintf
280 in the code generated by the bison parser. */
282 extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf
, 2 ,3);
284 #endif /* PARSER_DEFS_H */