Commit | Line | Data |
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c906108c | 1 | /* Parser definitions for GDB. |
96cb11df | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, |
7b6bb8da | 4 | 1998, 1999, 2000, 2002, 2007, 2008, 2009, 2010, 2011 |
4c38e0a4 | 5 | Free Software Foundation, Inc. |
96cb11df | 6 | |
c906108c SS |
7 | Modified from expread.y by the Department of Computer Science at the |
8 | State University of New York at Buffalo. | |
9 | ||
c5aa993b | 10 | This file is part of GDB. |
c906108c | 11 | |
c5aa993b JM |
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 | |
a9762ec7 | 14 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 15 | (at your option) any later version. |
c906108c | 16 | |
c5aa993b JM |
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. | |
c906108c | 21 | |
c5aa993b | 22 | You should have received a copy of the GNU General Public License |
a9762ec7 | 23 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
24 | |
25 | #if !defined (PARSER_DEFS_H) | |
26 | #define PARSER_DEFS_H 1 | |
27 | ||
d16aafd8 AC |
28 | #include "doublest.h" |
29 | ||
fe898f56 DC |
30 | struct block; |
31 | ||
92981e24 TT |
32 | extern int parser_debug; |
33 | ||
c906108c SS |
34 | extern struct expression *expout; |
35 | extern int expout_size; | |
36 | extern int expout_ptr; | |
37 | ||
3e79cecf UW |
38 | #define parse_gdbarch (expout->gdbarch) |
39 | #define parse_language (expout->language_defn) | |
40 | ||
c906108c SS |
41 | /* If this is nonzero, this block is used as the lexical context |
42 | for symbol names. */ | |
43 | ||
44 | extern struct block *expression_context_block; | |
45 | ||
84f0252a JB |
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. */ | |
f7321c06 | 50 | extern CORE_ADDR expression_context_pc; |
84f0252a | 51 | |
c906108c | 52 | /* The innermost context required by the stack and register variables |
0df8b418 | 53 | we've encountered so far. */ |
c906108c SS |
54 | extern struct block *innermost_block; |
55 | ||
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; | |
60 | ||
61 | /* Number of arguments seen so far in innermost function call. */ | |
62 | extern int arglist_len; | |
63 | ||
64 | /* A string token, either a char-string or bit-string. Char-strings are | |
0df8b418 | 65 | used, for example, for the names of symbols. */ |
c906108c SS |
66 | |
67 | struct stoken | |
68 | { | |
0df8b418 | 69 | /* Pointer to first byte of char-string or first bit of bit-string. */ |
c906108c | 70 | char *ptr; |
0df8b418 | 71 | /* Length of string in bytes for char-string or bits for bit-string. */ |
c906108c SS |
72 | int length; |
73 | }; | |
74 | ||
6c7a06a3 TT |
75 | struct typed_stoken |
76 | { | |
77 | /* A language-specific type field. */ | |
78 | int type; | |
0df8b418 | 79 | /* Pointer to first byte of char-string or first bit of bit-string. */ |
6c7a06a3 | 80 | char *ptr; |
0df8b418 | 81 | /* Length of string in bytes for char-string or bits for bit-string. */ |
6c7a06a3 TT |
82 | int length; |
83 | }; | |
84 | ||
85 | struct stoken_vector | |
86 | { | |
87 | int len; | |
88 | struct typed_stoken *tokens; | |
89 | }; | |
90 | ||
c906108c SS |
91 | struct ttype |
92 | { | |
93 | struct stoken stoken; | |
94 | struct type *type; | |
95 | }; | |
96 | ||
97 | struct symtoken | |
98 | { | |
99 | struct stoken stoken; | |
100 | struct symbol *sym; | |
101 | int is_a_field_of_this; | |
102 | }; | |
103 | ||
379b85df AF |
104 | struct objc_class_str |
105 | { | |
106 | struct stoken stoken; | |
107 | struct type *type; | |
108 | int class; | |
109 | }; | |
110 | ||
111 | ||
c906108c SS |
112 | /* For parsing of complicated types. |
113 | An array should be preceded in the list by the size of the array. */ | |
114 | enum type_pieces | |
c5aa993b | 115 | { |
2e2394a0 MS |
116 | tp_end = -1, |
117 | tp_pointer, | |
118 | tp_reference, | |
119 | tp_array, | |
120 | tp_function, | |
121 | tp_const, | |
47663de5 MS |
122 | tp_volatile, |
123 | tp_space_identifier | |
c5aa993b | 124 | }; |
c906108c | 125 | /* The stack can contain either an enum type_pieces or an int. */ |
c5aa993b JM |
126 | union type_stack_elt |
127 | { | |
128 | enum type_pieces piece; | |
129 | int int_val; | |
130 | }; | |
c906108c SS |
131 | extern union type_stack_elt *type_stack; |
132 | extern int type_stack_depth, type_stack_size; | |
133 | ||
a14ed312 | 134 | extern void write_exp_elt_opcode (enum exp_opcode); |
c906108c | 135 | |
a14ed312 | 136 | extern void write_exp_elt_sym (struct symbol *); |
c906108c | 137 | |
a14ed312 | 138 | extern void write_exp_elt_longcst (LONGEST); |
c906108c | 139 | |
a14ed312 | 140 | extern void write_exp_elt_dblcst (DOUBLEST); |
c906108c | 141 | |
27bc4d80 TJB |
142 | extern void write_exp_elt_decfloatcst (gdb_byte *); |
143 | ||
a14ed312 | 144 | extern void write_exp_elt_type (struct type *); |
c906108c | 145 | |
a14ed312 | 146 | extern void write_exp_elt_intern (struct internalvar *); |
c906108c | 147 | |
a14ed312 | 148 | extern void write_exp_string (struct stoken); |
c906108c | 149 | |
6c7a06a3 TT |
150 | void write_exp_string_vector (int type, struct stoken_vector *vec); |
151 | ||
a14ed312 | 152 | extern void write_exp_bitstring (struct stoken); |
c906108c | 153 | |
a14ed312 | 154 | extern void write_exp_elt_block (struct block *); |
c906108c | 155 | |
9e35dae4 DJ |
156 | extern void write_exp_elt_objfile (struct objfile *objfile); |
157 | ||
c841afd5 | 158 | extern void write_exp_msymbol (struct minimal_symbol *); |
c906108c | 159 | |
a14ed312 | 160 | extern void write_dollar_variable (struct stoken str); |
c906108c | 161 | |
65d12d83 TT |
162 | extern void mark_struct_expression (void); |
163 | ||
a14ed312 | 164 | extern char *find_template_name_end (char *); |
c906108c | 165 | |
a14ed312 | 166 | extern void start_arglist (void); |
c906108c | 167 | |
a14ed312 | 168 | extern int end_arglist (void); |
c906108c | 169 | |
a14ed312 | 170 | extern char *copy_name (struct stoken); |
c906108c | 171 | |
a14ed312 | 172 | extern void push_type (enum type_pieces); |
c906108c | 173 | |
a14ed312 | 174 | extern void push_type_int (int); |
c906108c | 175 | |
47663de5 MS |
176 | extern void push_type_address_space (char *); |
177 | ||
a14ed312 | 178 | extern enum type_pieces pop_type (void); |
c906108c | 179 | |
a14ed312 | 180 | extern int pop_type_int (void); |
c906108c | 181 | |
a14ed312 | 182 | extern int length_of_subexp (struct expression *, int); |
c906108c | 183 | |
5f9769d1 PH |
184 | extern int dump_subexp (struct expression *, struct ui_file *, int); |
185 | ||
186 | extern int dump_subexp_body_standard (struct expression *, | |
187 | struct ui_file *, int); | |
188 | ||
554794dc | 189 | extern void operator_length (const struct expression *, int, int *, int *); |
24daaebc | 190 | |
554794dc SDJ |
191 | extern void operator_length_standard (const struct expression *, int, int *, |
192 | int *); | |
5f9769d1 | 193 | |
c0201579 JK |
194 | extern int operator_check_standard (struct expression *exp, int pos, |
195 | int (*objfile_func) | |
196 | (struct objfile *objfile, void *data), | |
197 | void *data); | |
198 | ||
5f9769d1 PH |
199 | extern char *op_name_standard (enum exp_opcode); |
200 | ||
a14ed312 | 201 | extern struct type *follow_types (struct type *); |
c906108c | 202 | |
e85c3284 PH |
203 | extern void null_post_parser (struct expression **, int); |
204 | ||
d30f5e1f DE |
205 | extern int parse_float (const char *p, int len, DOUBLEST *d, |
206 | const char **suffix); | |
207 | ||
208 | extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len, | |
209 | DOUBLEST *d, struct type **t); | |
210 | ||
c906108c SS |
211 | /* During parsing of a C expression, the pointer to the next character |
212 | is in this variable. */ | |
213 | ||
214 | extern char *lexptr; | |
215 | ||
0df8b418 | 216 | /* After a token has been recognized, this variable points to it. |
665132f9 MS |
217 | Currently used only for error reporting. */ |
218 | extern char *prev_lexptr; | |
219 | ||
c906108c SS |
220 | /* Tokens that refer to names do so with explicit pointer and length, |
221 | so they can share the storage that lexptr is parsing. | |
222 | ||
223 | When it is necessary to pass a name to a function that expects | |
224 | a null-terminated string, the substring is copied out | |
225 | into a block of storage that namecopy points to. | |
226 | ||
227 | namecopy is allocated once, guaranteed big enough, for each parsing. */ | |
228 | ||
229 | extern char *namecopy; | |
230 | ||
231 | /* Current depth in parentheses within the expression. */ | |
232 | ||
233 | extern int paren_depth; | |
234 | ||
235 | /* Nonzero means stop parsing on first comma (if not within parentheses). */ | |
236 | ||
237 | extern int comma_terminates; | |
238 | \f | |
239 | /* These codes indicate operator precedences for expression printing, | |
240 | least tightly binding first. */ | |
241 | /* Adding 1 to a precedence value is done for binary operators, | |
242 | on the operand which is more tightly bound, so that operators | |
243 | of equal precedence within that operand will get parentheses. */ | |
244 | /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator; | |
245 | they are used as the "surrounding precedence" to force | |
246 | various kinds of things to be parenthesized. */ | |
247 | enum precedence | |
c5aa993b JM |
248 | { |
249 | PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, | |
250 | PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, | |
251 | PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, | |
252 | PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION | |
253 | }; | |
c906108c SS |
254 | |
255 | /* Table mapping opcodes into strings for printing operators | |
256 | and precedences of the operators. */ | |
257 | ||
258 | struct op_print | |
c5aa993b JM |
259 | { |
260 | char *string; | |
261 | enum exp_opcode opcode; | |
262 | /* Precedence of operator. These values are used only by comparisons. */ | |
263 | enum precedence precedence; | |
264 | ||
265 | /* For a binary operator: 1 iff right associate. | |
0df8b418 | 266 | For a unary operator: 1 iff postfix. */ |
c5aa993b JM |
267 | int right_assoc; |
268 | }; | |
c906108c | 269 | |
5f9769d1 PH |
270 | /* Information needed to print, prefixify, and evaluate expressions for |
271 | a given language. */ | |
272 | ||
273 | struct exp_descriptor | |
274 | { | |
275 | /* Print subexpression. */ | |
276 | void (*print_subexp) (struct expression *, int *, struct ui_file *, | |
277 | enum precedence); | |
278 | ||
279 | /* Returns number of exp_elements needed to represent an operator and | |
280 | the number of subexpressions it takes. */ | |
554794dc | 281 | void (*operator_length) (const struct expression*, int, int*, int *); |
5f9769d1 | 282 | |
c0201579 JK |
283 | /* Call TYPE_FUNC and OBJFILE_FUNC for any TYPE and OBJFILE found being |
284 | referenced by the single operator of EXP at position POS. Operator | |
285 | parameters are located at positive (POS + number) offsets in EXP. | |
286 | The functions should never be called with NULL TYPE or NULL OBJFILE. | |
287 | Functions should get passed an arbitrary caller supplied DATA pointer. | |
288 | If any of the functions returns non-zero value then (any other) non-zero | |
289 | value should be immediately returned to the caller. Otherwise zero | |
290 | should be returned. */ | |
291 | int (*operator_check) (struct expression *exp, int pos, | |
292 | int (*objfile_func) (struct objfile *objfile, | |
293 | void *data), | |
294 | void *data); | |
295 | ||
5f9769d1 PH |
296 | /* Name of this operator for dumping purposes. */ |
297 | char *(*op_name) (enum exp_opcode); | |
298 | ||
299 | /* Dump the rest of this (prefix) expression after the operator | |
300 | itself has been printed. See dump_subexp_body_standard in | |
301 | (expprint.c). */ | |
302 | int (*dump_subexp_body) (struct expression *, struct ui_file *, int); | |
303 | ||
304 | /* Evaluate an expression. */ | |
305 | struct value *(*evaluate_exp) (struct type *, struct expression *, | |
306 | int *, enum noside); | |
307 | }; | |
308 | ||
309 | ||
310 | /* Default descriptor containing standard definitions of all | |
311 | elements. */ | |
312 | extern const struct exp_descriptor exp_descriptor_standard; | |
313 | ||
314 | /* Functions used by language-specific extended operators to (recursively) | |
315 | print/dump subexpressions. */ | |
316 | ||
317 | extern void print_subexp (struct expression *, int *, struct ui_file *, | |
318 | enum precedence); | |
319 | ||
320 | extern void print_subexp_standard (struct expression *, int *, | |
321 | struct ui_file *, enum precedence); | |
322 | ||
f461f5cf PM |
323 | /* Function used to avoid direct calls to fprintf |
324 | in the code generated by the bison parser. */ | |
325 | ||
a0b31db1 | 326 | extern void parser_fprintf (FILE *, const char *, ...) ATTRIBUTE_PRINTF (2, 3); |
f461f5cf | 327 | |
c0201579 JK |
328 | extern int exp_uses_objfile (struct expression *exp, struct objfile *objfile); |
329 | ||
c5aa993b | 330 | #endif /* PARSER_DEFS_H */ |