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, 2009, 2010
5 Free Software Foundation, Inc.
7 Modified from expread.y by the Department of Computer Science at the
8 State University of New York at Buffalo.
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #if !defined (PARSER_DEFS_H)
26 #define PARSER_DEFS_H 1
32 extern struct expression
*expout
;
33 extern int expout_size
;
34 extern int expout_ptr
;
36 #define parse_gdbarch (expout->gdbarch)
37 #define parse_language (expout->language_defn)
39 /* If this is nonzero, this block is used as the lexical context
42 extern struct block
*expression_context_block
;
44 /* If expression_context_block is non-zero, then this is the PC within
45 the block that we want to evaluate expressions at. When debugging
46 C or C++ code, we use this to find the exact line we're at, and
47 then look up the macro definitions active at that point. */
48 extern CORE_ADDR expression_context_pc
;
50 /* The innermost context required by the stack and register variables
51 we've encountered so far. */
52 extern struct block
*innermost_block
;
54 /* The block in which the most recently discovered symbol was found.
55 FIXME: Should be declared along with lookup_symbol in symtab.h; is not
56 related specifically to parsing. */
57 extern struct block
*block_found
;
59 /* Number of arguments seen so far in innermost function call. */
60 extern int arglist_len
;
62 /* A string token, either a char-string or bit-string. Char-strings are
63 used, for example, for the names of symbols. */
67 /* Pointer to first byte of char-string or first bit of bit-string */
69 /* Length of string in bytes for char-string or bits for bit-string */
75 /* A language-specific type field. */
77 /* Pointer to first byte of char-string or first bit of bit-string */
79 /* Length of string in bytes for char-string or bits for bit-string */
86 struct typed_stoken
*tokens
;
99 int is_a_field_of_this
;
102 struct objc_class_str
104 struct stoken stoken
;
110 /* For parsing of complicated types.
111 An array should be preceded in the list by the size of the array. */
123 /* The stack can contain either an enum type_pieces or an int. */
126 enum type_pieces piece
;
129 extern union type_stack_elt
*type_stack
;
130 extern int type_stack_depth
, type_stack_size
;
132 extern void write_exp_elt (union exp_element
);
134 extern void write_exp_elt_opcode (enum exp_opcode
);
136 extern void write_exp_elt_sym (struct symbol
*);
138 extern void write_exp_elt_longcst (LONGEST
);
140 extern void write_exp_elt_dblcst (DOUBLEST
);
142 extern void write_exp_elt_decfloatcst (gdb_byte
*);
144 extern void write_exp_elt_type (struct type
*);
146 extern void write_exp_elt_intern (struct internalvar
*);
148 extern void write_exp_string (struct stoken
);
150 void write_exp_string_vector (int type
, struct stoken_vector
*vec
);
152 extern void write_exp_bitstring (struct stoken
);
154 extern void write_exp_elt_block (struct block
*);
156 extern void write_exp_elt_objfile (struct objfile
*objfile
);
158 extern void write_exp_msymbol (struct minimal_symbol
*);
160 extern void write_dollar_variable (struct stoken str
);
162 extern void mark_struct_expression (void);
164 extern char *find_template_name_end (char *);
166 extern void start_arglist (void);
168 extern int end_arglist (void);
170 extern char *copy_name (struct stoken
);
172 extern void push_type (enum type_pieces
);
174 extern void push_type_int (int);
176 extern void push_type_address_space (char *);
178 extern enum type_pieces
pop_type (void);
180 extern int pop_type_int (void);
182 extern int length_of_subexp (struct expression
*, int);
184 extern int dump_subexp (struct expression
*, struct ui_file
*, int);
186 extern int dump_subexp_body_standard (struct expression
*,
187 struct ui_file
*, int);
189 extern void operator_length (struct expression
*, int, int *, int *);
191 extern void operator_length_standard (struct expression
*, int, int *, int *);
193 extern char *op_name_standard (enum exp_opcode
);
195 extern struct type
*follow_types (struct type
*);
197 extern void null_post_parser (struct expression
**, int);
199 /* During parsing of a C expression, the pointer to the next character
200 is in this variable. */
204 /* After a token has been recognized, this variable points to it.
205 Currently used only for error reporting. */
206 extern char *prev_lexptr
;
208 /* Tokens that refer to names do so with explicit pointer and length,
209 so they can share the storage that lexptr is parsing.
211 When it is necessary to pass a name to a function that expects
212 a null-terminated string, the substring is copied out
213 into a block of storage that namecopy points to.
215 namecopy is allocated once, guaranteed big enough, for each parsing. */
217 extern char *namecopy
;
219 /* Current depth in parentheses within the expression. */
221 extern int paren_depth
;
223 /* Nonzero means stop parsing on first comma (if not within parentheses). */
225 extern int comma_terminates
;
227 /* These codes indicate operator precedences for expression printing,
228 least tightly binding first. */
229 /* Adding 1 to a precedence value is done for binary operators,
230 on the operand which is more tightly bound, so that operators
231 of equal precedence within that operand will get parentheses. */
232 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
233 they are used as the "surrounding precedence" to force
234 various kinds of things to be parenthesized. */
237 PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_LOGICAL_OR
,
238 PREC_LOGICAL_AND
, PREC_BITWISE_IOR
, PREC_BITWISE_AND
, PREC_BITWISE_XOR
,
239 PREC_EQUAL
, PREC_ORDER
, PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
240 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
, PREC_BUILTIN_FUNCTION
243 /* Table mapping opcodes into strings for printing operators
244 and precedences of the operators. */
249 enum exp_opcode opcode
;
250 /* Precedence of operator. These values are used only by comparisons. */
251 enum precedence precedence
;
253 /* For a binary operator: 1 iff right associate.
254 For a unary operator: 1 iff postfix. */
258 /* Information needed to print, prefixify, and evaluate expressions for
261 struct exp_descriptor
263 /* Print subexpression. */
264 void (*print_subexp
) (struct expression
*, int *, struct ui_file
*,
267 /* Returns number of exp_elements needed to represent an operator and
268 the number of subexpressions it takes. */
269 void (*operator_length
) (struct expression
*, int, int*, int *);
271 /* Name of this operator for dumping purposes. */
272 char *(*op_name
) (enum exp_opcode
);
274 /* Dump the rest of this (prefix) expression after the operator
275 itself has been printed. See dump_subexp_body_standard in
277 int (*dump_subexp_body
) (struct expression
*, struct ui_file
*, int);
279 /* Evaluate an expression. */
280 struct value
*(*evaluate_exp
) (struct type
*, struct expression
*,
285 /* Default descriptor containing standard definitions of all
287 extern const struct exp_descriptor exp_descriptor_standard
;
289 /* Functions used by language-specific extended operators to (recursively)
290 print/dump subexpressions. */
292 extern void print_subexp (struct expression
*, int *, struct ui_file
*,
295 extern void print_subexp_standard (struct expression
*, int *,
296 struct ui_file
*, enum precedence
);
298 /* Function used to avoid direct calls to fprintf
299 in the code generated by the bison parser. */
301 extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf
, 2 ,3);
303 #endif /* PARSER_DEFS_H */