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 int parser_debug
;
34 extern struct expression
*expout
;
35 extern int expout_size
;
36 extern int expout_ptr
;
38 #define parse_gdbarch (expout->gdbarch)
39 #define parse_language (expout->language_defn)
41 /* If this is nonzero, this block is used as the lexical context
44 extern struct block
*expression_context_block
;
46 /* If expression_context_block is non-zero, then this is the PC within
47 the block that we want to evaluate expressions at. When debugging
48 C or C++ code, we use this to find the exact line we're at, and
49 then look up the macro definitions active at that point. */
50 extern CORE_ADDR expression_context_pc
;
52 /* The innermost context required by the stack and register variables
53 we've encountered so far. */
54 extern struct block
*innermost_block
;
56 /* The block in which the most recently discovered symbol was found.
57 FIXME: Should be declared along with lookup_symbol in symtab.h; is not
58 related specifically to parsing. */
59 extern struct block
*block_found
;
61 /* Number of arguments seen so far in innermost function call. */
62 extern int arglist_len
;
64 /* A string token, either a char-string or bit-string. Char-strings are
65 used, for example, for the names of symbols. */
69 /* Pointer to first byte of char-string or first bit of bit-string */
71 /* Length of string in bytes for char-string or bits for bit-string */
77 /* A language-specific type field. */
79 /* Pointer to first byte of char-string or first bit of bit-string */
81 /* Length of string in bytes for char-string or bits for bit-string */
88 struct typed_stoken
*tokens
;
101 int is_a_field_of_this
;
104 struct objc_class_str
106 struct stoken stoken
;
112 /* For parsing of complicated types.
113 An array should be preceded in the list by the size of the array. */
125 /* The stack can contain either an enum type_pieces or an int. */
128 enum type_pieces piece
;
131 extern union type_stack_elt
*type_stack
;
132 extern int type_stack_depth
, type_stack_size
;
134 extern void write_exp_elt (union exp_element
);
136 extern void write_exp_elt_opcode (enum exp_opcode
);
138 extern void write_exp_elt_sym (struct symbol
*);
140 extern void write_exp_elt_longcst (LONGEST
);
142 extern void write_exp_elt_dblcst (DOUBLEST
);
144 extern void write_exp_elt_decfloatcst (gdb_byte
*);
146 extern void write_exp_elt_type (struct type
*);
148 extern void write_exp_elt_intern (struct internalvar
*);
150 extern void write_exp_string (struct stoken
);
152 void write_exp_string_vector (int type
, struct stoken_vector
*vec
);
154 extern void write_exp_bitstring (struct stoken
);
156 extern void write_exp_elt_block (struct block
*);
158 extern void write_exp_elt_objfile (struct objfile
*objfile
);
160 extern void write_exp_msymbol (struct minimal_symbol
*);
162 extern void write_dollar_variable (struct stoken str
);
164 extern void mark_struct_expression (void);
166 extern char *find_template_name_end (char *);
168 extern void start_arglist (void);
170 extern int end_arglist (void);
172 extern char *copy_name (struct stoken
);
174 extern void push_type (enum type_pieces
);
176 extern void push_type_int (int);
178 extern void push_type_address_space (char *);
180 extern enum type_pieces
pop_type (void);
182 extern int pop_type_int (void);
184 extern int length_of_subexp (struct expression
*, int);
186 extern int dump_subexp (struct expression
*, struct ui_file
*, int);
188 extern int dump_subexp_body_standard (struct expression
*,
189 struct ui_file
*, int);
191 extern void operator_length (struct expression
*, int, int *, int *);
193 extern void operator_length_standard (struct expression
*, int, int *, int *);
195 extern char *op_name_standard (enum exp_opcode
);
197 extern struct type
*follow_types (struct type
*);
199 extern void null_post_parser (struct expression
**, int);
201 /* During parsing of a C expression, the pointer to the next character
202 is in this variable. */
206 /* After a token has been recognized, this variable points to it.
207 Currently used only for error reporting. */
208 extern char *prev_lexptr
;
210 /* Tokens that refer to names do so with explicit pointer and length,
211 so they can share the storage that lexptr is parsing.
213 When it is necessary to pass a name to a function that expects
214 a null-terminated string, the substring is copied out
215 into a block of storage that namecopy points to.
217 namecopy is allocated once, guaranteed big enough, for each parsing. */
219 extern char *namecopy
;
221 /* Current depth in parentheses within the expression. */
223 extern int paren_depth
;
225 /* Nonzero means stop parsing on first comma (if not within parentheses). */
227 extern int comma_terminates
;
229 /* These codes indicate operator precedences for expression printing,
230 least tightly binding first. */
231 /* Adding 1 to a precedence value is done for binary operators,
232 on the operand which is more tightly bound, so that operators
233 of equal precedence within that operand will get parentheses. */
234 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
235 they are used as the "surrounding precedence" to force
236 various kinds of things to be parenthesized. */
239 PREC_NULL
, PREC_COMMA
, PREC_ABOVE_COMMA
, PREC_ASSIGN
, PREC_LOGICAL_OR
,
240 PREC_LOGICAL_AND
, PREC_BITWISE_IOR
, PREC_BITWISE_AND
, PREC_BITWISE_XOR
,
241 PREC_EQUAL
, PREC_ORDER
, PREC_SHIFT
, PREC_ADD
, PREC_MUL
, PREC_REPEAT
,
242 PREC_HYPER
, PREC_PREFIX
, PREC_SUFFIX
, PREC_BUILTIN_FUNCTION
245 /* Table mapping opcodes into strings for printing operators
246 and precedences of the operators. */
251 enum exp_opcode opcode
;
252 /* Precedence of operator. These values are used only by comparisons. */
253 enum precedence precedence
;
255 /* For a binary operator: 1 iff right associate.
256 For a unary operator: 1 iff postfix. */
260 /* Information needed to print, prefixify, and evaluate expressions for
263 struct exp_descriptor
265 /* Print subexpression. */
266 void (*print_subexp
) (struct expression
*, int *, struct ui_file
*,
269 /* Returns number of exp_elements needed to represent an operator and
270 the number of subexpressions it takes. */
271 void (*operator_length
) (struct expression
*, int, int*, int *);
273 /* Name of this operator for dumping purposes. */
274 char *(*op_name
) (enum exp_opcode
);
276 /* Dump the rest of this (prefix) expression after the operator
277 itself has been printed. See dump_subexp_body_standard in
279 int (*dump_subexp_body
) (struct expression
*, struct ui_file
*, int);
281 /* Evaluate an expression. */
282 struct value
*(*evaluate_exp
) (struct type
*, struct expression
*,
287 /* Default descriptor containing standard definitions of all
289 extern const struct exp_descriptor exp_descriptor_standard
;
291 /* Functions used by language-specific extended operators to (recursively)
292 print/dump subexpressions. */
294 extern void print_subexp (struct expression
*, int *, struct ui_file
*,
297 extern void print_subexp_standard (struct expression
*, int *,
298 struct ui_file
*, enum precedence
);
300 /* Function used to avoid direct calls to fprintf
301 in the code generated by the bison parser. */
303 extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf
, 2 ,3);
305 #endif /* PARSER_DEFS_H */