1 /* Parser definitions for GDB.
3 Copyright 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2002 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 2 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, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
26 #if !defined (PARSER_DEFS_H)
27 #define PARSER_DEFS_H 1
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 /* If expression_context_block is non-zero, then this is the PC within
43 the block that we want to evaluate expressions at. When debugging
44 C or C++ code, we use this to find the exact line we're at, and
45 then look up the macro definitions active at that point. */
46 extern CORE_ADDR expression_context_pc;
48 /* The innermost context required by the stack and register variables
49 we've encountered so far. */
50 extern struct block *innermost_block;
52 /* The block in which the most recently discovered symbol was found.
53 FIXME: Should be declared along with lookup_symbol in symtab.h; is not
54 related specifically to parsing. */
55 extern struct block *block_found;
57 /* Number of arguments seen so far in innermost function call. */
58 extern int arglist_len;
60 /* A string token, either a char-string or bit-string. Char-strings are
61 used, for example, for the names of symbols. */
65 /* Pointer to first byte of char-string or first bit of bit-string */
67 /* Length of string in bytes for char-string or bits for bit-string */
81 int is_a_field_of_this;
92 /* For parsing of complicated types.
93 An array should be preceded in the list by the size of the array. */
105 /* The stack can contain either an enum type_pieces or an int. */
108 enum type_pieces piece;
111 extern union type_stack_elt *type_stack;
112 extern int type_stack_depth, type_stack_size;
114 extern void write_exp_elt (union exp_element);
116 extern void write_exp_elt_opcode (enum exp_opcode);
118 extern void write_exp_elt_sym (struct symbol *);
120 extern void write_exp_elt_longcst (LONGEST);
122 extern void write_exp_elt_dblcst (DOUBLEST);
124 extern void write_exp_elt_type (struct type *);
126 extern void write_exp_elt_intern (struct internalvar *);
128 extern void write_exp_string (struct stoken);
130 extern void write_exp_bitstring (struct stoken);
132 extern void write_exp_elt_block (struct block *);
134 extern void write_exp_msymbol (struct minimal_symbol *,
135 struct type *, struct type *);
137 extern void write_dollar_variable (struct stoken str);
139 extern struct symbol *parse_nested_classes_for_hpacc (char *, int, char **,
142 extern char *find_template_name_end (char *);
144 extern void start_arglist (void);
146 extern int end_arglist (void);
148 extern char *copy_name (struct stoken);
150 extern void push_type (enum type_pieces);
152 extern void push_type_int (int);
154 extern void push_type_address_space (char *);
156 extern enum type_pieces pop_type (void);
158 extern int pop_type_int (void);
160 extern int length_of_subexp (struct expression *, int);
162 extern int dump_subexp (struct expression *, struct ui_file *, int);
164 extern int dump_subexp_body_standard (struct expression *,
165 struct ui_file *, int);
167 extern void operator_length (struct expression *, int, int *, int *);
169 extern void operator_length_standard (struct expression *, int, int *, int *);
171 extern char *op_name_standard (enum exp_opcode);
173 extern struct type *follow_types (struct type *);
175 extern void null_post_parser (struct expression **, int);
177 /* During parsing of a C expression, the pointer to the next character
178 is in this variable. */
182 /* After a token has been recognized, this variable points to it.
183 Currently used only for error reporting. */
184 extern char *prev_lexptr;
186 /* Tokens that refer to names do so with explicit pointer and length,
187 so they can share the storage that lexptr is parsing.
189 When it is necessary to pass a name to a function that expects
190 a null-terminated string, the substring is copied out
191 into a block of storage that namecopy points to.
193 namecopy is allocated once, guaranteed big enough, for each parsing. */
195 extern char *namecopy;
197 /* Current depth in parentheses within the expression. */
199 extern int paren_depth;
201 /* Nonzero means stop parsing on first comma (if not within parentheses). */
203 extern int comma_terminates;
205 /* These codes indicate operator precedences for expression printing,
206 least tightly binding first. */
207 /* Adding 1 to a precedence value is done for binary operators,
208 on the operand which is more tightly bound, so that operators
209 of equal precedence within that operand will get parentheses. */
210 /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator;
211 they are used as the "surrounding precedence" to force
212 various kinds of things to be parenthesized. */
215 PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR,
216 PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR,
217 PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT,
218 PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION
221 /* Table mapping opcodes into strings for printing operators
222 and precedences of the operators. */
227 enum exp_opcode opcode;
228 /* Precedence of operator. These values are used only by comparisons. */
229 enum precedence precedence;
231 /* For a binary operator: 1 iff right associate.
232 For a unary operator: 1 iff postfix. */
236 /* Information needed to print, prefixify, and evaluate expressions for
239 struct exp_descriptor
241 /* Print subexpression. */
242 void (*print_subexp) (struct expression *, int *, struct ui_file *,
245 /* Returns number of exp_elements needed to represent an operator and
246 the number of subexpressions it takes. */
247 void (*operator_length) (struct expression*, int, int*, int *);
249 /* Name of this operator for dumping purposes. */
250 char *(*op_name) (enum exp_opcode);
252 /* Dump the rest of this (prefix) expression after the operator
253 itself has been printed. See dump_subexp_body_standard in
255 int (*dump_subexp_body) (struct expression *, struct ui_file *, int);
257 /* Evaluate an expression. */
258 struct value *(*evaluate_exp) (struct type *, struct expression *,
263 /* Default descriptor containing standard definitions of all
265 extern const struct exp_descriptor exp_descriptor_standard;
267 /* Functions used by language-specific extended operators to (recursively)
268 print/dump subexpressions. */
270 extern void print_subexp (struct expression *, int *, struct ui_file *,
273 extern void print_subexp_standard (struct expression *, int *,
274 struct ui_file *, enum precedence);
276 /* Function used to avoid direct calls to fprintf
277 in the code generated by the bison parser. */
279 extern void parser_fprintf (FILE *, const char *, ...) ATTR_FORMAT (printf, 2 ,3);
281 #endif /* PARSER_DEFS_H */