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c906108c | 1 | /* Parser definitions for GDB. |
96cb11df | 2 | |
0b302171 JB |
3 | Copyright (C) 1986, 1989-2000, 2002, 2007-2012 Free Software |
4 | Foundation, Inc. | |
96cb11df | 5 | |
c906108c SS |
6 | Modified from expread.y by the Department of Computer Science at the |
7 | State University of New York at Buffalo. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
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 | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
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. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #if !defined (PARSER_DEFS_H) | |
25 | #define PARSER_DEFS_H 1 | |
26 | ||
d16aafd8 AC |
27 | #include "doublest.h" |
28 | ||
fe898f56 DC |
29 | struct block; |
30 | ||
92981e24 TT |
31 | extern int parser_debug; |
32 | ||
c906108c SS |
33 | extern struct expression *expout; |
34 | extern int expout_size; | |
35 | extern int expout_ptr; | |
36 | ||
3e79cecf UW |
37 | #define parse_gdbarch (expout->gdbarch) |
38 | #define parse_language (expout->language_defn) | |
39 | ||
c906108c SS |
40 | /* If this is nonzero, this block is used as the lexical context |
41 | for symbol names. */ | |
42 | ||
43 | extern struct block *expression_context_block; | |
44 | ||
84f0252a JB |
45 | /* If expression_context_block is non-zero, then this is the PC within |
46 | the block that we want to evaluate expressions at. When debugging | |
47 | C or C++ code, we use this to find the exact line we're at, and | |
48 | then look up the macro definitions active at that point. */ | |
f7321c06 | 49 | extern CORE_ADDR expression_context_pc; |
84f0252a | 50 | |
c906108c | 51 | /* The innermost context required by the stack and register variables |
0df8b418 | 52 | we've encountered so far. */ |
c906108c SS |
53 | extern struct block *innermost_block; |
54 | ||
55 | /* The block in which the most recently discovered symbol was found. | |
56 | FIXME: Should be declared along with lookup_symbol in symtab.h; is not | |
57 | related specifically to parsing. */ | |
58 | extern struct block *block_found; | |
59 | ||
60 | /* Number of arguments seen so far in innermost function call. */ | |
61 | extern int arglist_len; | |
62 | ||
63 | /* A string token, either a char-string or bit-string. Char-strings are | |
0df8b418 | 64 | used, for example, for the names of symbols. */ |
c906108c SS |
65 | |
66 | struct stoken | |
67 | { | |
0df8b418 | 68 | /* Pointer to first byte of char-string or first bit of bit-string. */ |
c906108c | 69 | char *ptr; |
0df8b418 | 70 | /* Length of string in bytes for char-string or bits for bit-string. */ |
c906108c SS |
71 | int length; |
72 | }; | |
73 | ||
6c7a06a3 TT |
74 | struct typed_stoken |
75 | { | |
76 | /* A language-specific type field. */ | |
77 | int type; | |
0df8b418 | 78 | /* Pointer to first byte of char-string or first bit of bit-string. */ |
6c7a06a3 | 79 | char *ptr; |
0df8b418 | 80 | /* Length of string in bytes for char-string or bits for bit-string. */ |
6c7a06a3 TT |
81 | int length; |
82 | }; | |
83 | ||
84 | struct stoken_vector | |
85 | { | |
86 | int len; | |
87 | struct typed_stoken *tokens; | |
88 | }; | |
89 | ||
c906108c SS |
90 | struct ttype |
91 | { | |
92 | struct stoken stoken; | |
93 | struct type *type; | |
94 | }; | |
95 | ||
96 | struct symtoken | |
97 | { | |
98 | struct stoken stoken; | |
99 | struct symbol *sym; | |
100 | int is_a_field_of_this; | |
101 | }; | |
102 | ||
379b85df AF |
103 | struct objc_class_str |
104 | { | |
105 | struct stoken stoken; | |
106 | struct type *type; | |
107 | int class; | |
108 | }; | |
109 | ||
110 | ||
c906108c SS |
111 | /* For parsing of complicated types. |
112 | An array should be preceded in the list by the size of the array. */ | |
113 | enum type_pieces | |
c5aa993b | 114 | { |
2e2394a0 MS |
115 | tp_end = -1, |
116 | tp_pointer, | |
117 | tp_reference, | |
118 | tp_array, | |
119 | tp_function, | |
120 | tp_const, | |
47663de5 MS |
121 | tp_volatile, |
122 | tp_space_identifier | |
c5aa993b | 123 | }; |
c906108c | 124 | /* The stack can contain either an enum type_pieces or an int. */ |
c5aa993b JM |
125 | union type_stack_elt |
126 | { | |
127 | enum type_pieces piece; | |
128 | int int_val; | |
129 | }; | |
1a7d0ce4 TT |
130 | |
131 | /* The type stack is an instance of this structure. */ | |
132 | ||
133 | struct type_stack | |
134 | { | |
135 | /* Elements on the stack. */ | |
136 | union type_stack_elt *elements; | |
137 | /* Current stack depth. */ | |
138 | int depth; | |
139 | /* Allocated size of stack. */ | |
140 | int size; | |
141 | }; | |
c906108c | 142 | |
55aa24fb SDJ |
143 | /* Helper function to initialize the expout, expout_size, expout_ptr |
144 | trio before it is used to store expression elements created during | |
145 | the parsing of an expression. INITIAL_SIZE is the initial size of | |
146 | the expout array. LANG is the language used to parse the expression. | |
147 | And GDBARCH is the gdbarch to use during parsing. */ | |
148 | ||
149 | extern void initialize_expout (int, const struct language_defn *, | |
150 | struct gdbarch *); | |
151 | ||
152 | /* Helper function that frees any unsed space in the expout array. | |
153 | It is generally used when the parser has just been parsed and | |
154 | created. */ | |
155 | ||
156 | extern void reallocate_expout (void); | |
157 | ||
158 | /* Reverse an expression from suffix form (in which it is constructed) | |
159 | to prefix form (in which we can conveniently print or execute it). | |
160 | Ordinarily this always returns -1. However, if EXPOUT_LAST_STRUCT | |
161 | is not -1 (i.e., we are trying to complete a field name), it will | |
162 | return the index of the subexpression which is the left-hand-side | |
163 | of the struct operation at EXPOUT_LAST_STRUCT. */ | |
164 | ||
165 | extern int prefixify_expression (struct expression *expr); | |
166 | ||
a14ed312 | 167 | extern void write_exp_elt_opcode (enum exp_opcode); |
c906108c | 168 | |
a14ed312 | 169 | extern void write_exp_elt_sym (struct symbol *); |
c906108c | 170 | |
a14ed312 | 171 | extern void write_exp_elt_longcst (LONGEST); |
c906108c | 172 | |
a14ed312 | 173 | extern void write_exp_elt_dblcst (DOUBLEST); |
c906108c | 174 | |
27bc4d80 TJB |
175 | extern void write_exp_elt_decfloatcst (gdb_byte *); |
176 | ||
a14ed312 | 177 | extern void write_exp_elt_type (struct type *); |
c906108c | 178 | |
a14ed312 | 179 | extern void write_exp_elt_intern (struct internalvar *); |
c906108c | 180 | |
a14ed312 | 181 | extern void write_exp_string (struct stoken); |
c906108c | 182 | |
6c7a06a3 TT |
183 | void write_exp_string_vector (int type, struct stoken_vector *vec); |
184 | ||
a14ed312 | 185 | extern void write_exp_bitstring (struct stoken); |
c906108c | 186 | |
a14ed312 | 187 | extern void write_exp_elt_block (struct block *); |
c906108c | 188 | |
9e35dae4 DJ |
189 | extern void write_exp_elt_objfile (struct objfile *objfile); |
190 | ||
c841afd5 | 191 | extern void write_exp_msymbol (struct minimal_symbol *); |
c906108c | 192 | |
a14ed312 | 193 | extern void write_dollar_variable (struct stoken str); |
c906108c | 194 | |
65d12d83 TT |
195 | extern void mark_struct_expression (void); |
196 | ||
a14ed312 | 197 | extern char *find_template_name_end (char *); |
c906108c | 198 | |
a14ed312 | 199 | extern void start_arglist (void); |
c906108c | 200 | |
a14ed312 | 201 | extern int end_arglist (void); |
c906108c | 202 | |
a14ed312 | 203 | extern char *copy_name (struct stoken); |
c906108c | 204 | |
95c391b6 TT |
205 | extern void insert_type (enum type_pieces); |
206 | ||
a14ed312 | 207 | extern void push_type (enum type_pieces); |
c906108c | 208 | |
a14ed312 | 209 | extern void push_type_int (int); |
c906108c | 210 | |
95c391b6 | 211 | extern void insert_type_address_space (char *); |
47663de5 | 212 | |
a14ed312 | 213 | extern enum type_pieces pop_type (void); |
c906108c | 214 | |
a14ed312 | 215 | extern int pop_type_int (void); |
c906108c | 216 | |
a14ed312 | 217 | extern int length_of_subexp (struct expression *, int); |
c906108c | 218 | |
5f9769d1 PH |
219 | extern int dump_subexp (struct expression *, struct ui_file *, int); |
220 | ||
221 | extern int dump_subexp_body_standard (struct expression *, | |
222 | struct ui_file *, int); | |
223 | ||
554794dc | 224 | extern void operator_length (const struct expression *, int, int *, int *); |
24daaebc | 225 | |
554794dc SDJ |
226 | extern void operator_length_standard (const struct expression *, int, int *, |
227 | int *); | |
5f9769d1 | 228 | |
c0201579 JK |
229 | extern int operator_check_standard (struct expression *exp, int pos, |
230 | int (*objfile_func) | |
231 | (struct objfile *objfile, void *data), | |
232 | void *data); | |
233 | ||
5f9769d1 PH |
234 | extern char *op_name_standard (enum exp_opcode); |
235 | ||
a14ed312 | 236 | extern struct type *follow_types (struct type *); |
c906108c | 237 | |
e85c3284 PH |
238 | extern void null_post_parser (struct expression **, int); |
239 | ||
d30f5e1f DE |
240 | extern int parse_float (const char *p, int len, DOUBLEST *d, |
241 | const char **suffix); | |
242 | ||
243 | extern int parse_c_float (struct gdbarch *gdbarch, const char *p, int len, | |
244 | DOUBLEST *d, struct type **t); | |
245 | ||
c906108c SS |
246 | /* During parsing of a C expression, the pointer to the next character |
247 | is in this variable. */ | |
248 | ||
249 | extern char *lexptr; | |
250 | ||
0df8b418 | 251 | /* After a token has been recognized, this variable points to it. |
665132f9 MS |
252 | Currently used only for error reporting. */ |
253 | extern char *prev_lexptr; | |
254 | ||
c906108c SS |
255 | /* Current depth in parentheses within the expression. */ |
256 | ||
257 | extern int paren_depth; | |
258 | ||
259 | /* Nonzero means stop parsing on first comma (if not within parentheses). */ | |
260 | ||
261 | extern int comma_terminates; | |
262 | \f | |
263 | /* These codes indicate operator precedences for expression printing, | |
264 | least tightly binding first. */ | |
265 | /* Adding 1 to a precedence value is done for binary operators, | |
266 | on the operand which is more tightly bound, so that operators | |
267 | of equal precedence within that operand will get parentheses. */ | |
268 | /* PREC_HYPER and PREC_ABOVE_COMMA are not the precedence of any operator; | |
269 | they are used as the "surrounding precedence" to force | |
270 | various kinds of things to be parenthesized. */ | |
271 | enum precedence | |
c5aa993b JM |
272 | { |
273 | PREC_NULL, PREC_COMMA, PREC_ABOVE_COMMA, PREC_ASSIGN, PREC_LOGICAL_OR, | |
274 | PREC_LOGICAL_AND, PREC_BITWISE_IOR, PREC_BITWISE_AND, PREC_BITWISE_XOR, | |
275 | PREC_EQUAL, PREC_ORDER, PREC_SHIFT, PREC_ADD, PREC_MUL, PREC_REPEAT, | |
276 | PREC_HYPER, PREC_PREFIX, PREC_SUFFIX, PREC_BUILTIN_FUNCTION | |
277 | }; | |
c906108c SS |
278 | |
279 | /* Table mapping opcodes into strings for printing operators | |
280 | and precedences of the operators. */ | |
281 | ||
282 | struct op_print | |
c5aa993b JM |
283 | { |
284 | char *string; | |
285 | enum exp_opcode opcode; | |
286 | /* Precedence of operator. These values are used only by comparisons. */ | |
287 | enum precedence precedence; | |
288 | ||
289 | /* For a binary operator: 1 iff right associate. | |
0df8b418 | 290 | For a unary operator: 1 iff postfix. */ |
c5aa993b JM |
291 | int right_assoc; |
292 | }; | |
c906108c | 293 | |
5f9769d1 PH |
294 | /* Information needed to print, prefixify, and evaluate expressions for |
295 | a given language. */ | |
296 | ||
297 | struct exp_descriptor | |
298 | { | |
299 | /* Print subexpression. */ | |
300 | void (*print_subexp) (struct expression *, int *, struct ui_file *, | |
301 | enum precedence); | |
302 | ||
303 | /* Returns number of exp_elements needed to represent an operator and | |
304 | the number of subexpressions it takes. */ | |
554794dc | 305 | void (*operator_length) (const struct expression*, int, int*, int *); |
5f9769d1 | 306 | |
c0201579 JK |
307 | /* Call TYPE_FUNC and OBJFILE_FUNC for any TYPE and OBJFILE found being |
308 | referenced by the single operator of EXP at position POS. Operator | |
309 | parameters are located at positive (POS + number) offsets in EXP. | |
310 | The functions should never be called with NULL TYPE or NULL OBJFILE. | |
311 | Functions should get passed an arbitrary caller supplied DATA pointer. | |
312 | If any of the functions returns non-zero value then (any other) non-zero | |
313 | value should be immediately returned to the caller. Otherwise zero | |
314 | should be returned. */ | |
315 | int (*operator_check) (struct expression *exp, int pos, | |
316 | int (*objfile_func) (struct objfile *objfile, | |
317 | void *data), | |
318 | void *data); | |
319 | ||
5f9769d1 PH |
320 | /* Name of this operator for dumping purposes. */ |
321 | char *(*op_name) (enum exp_opcode); | |
322 | ||
323 | /* Dump the rest of this (prefix) expression after the operator | |
324 | itself has been printed. See dump_subexp_body_standard in | |
325 | (expprint.c). */ | |
326 | int (*dump_subexp_body) (struct expression *, struct ui_file *, int); | |
327 | ||
328 | /* Evaluate an expression. */ | |
329 | struct value *(*evaluate_exp) (struct type *, struct expression *, | |
330 | int *, enum noside); | |
331 | }; | |
332 | ||
333 | ||
334 | /* Default descriptor containing standard definitions of all | |
335 | elements. */ | |
336 | extern const struct exp_descriptor exp_descriptor_standard; | |
337 | ||
338 | /* Functions used by language-specific extended operators to (recursively) | |
339 | print/dump subexpressions. */ | |
340 | ||
341 | extern void print_subexp (struct expression *, int *, struct ui_file *, | |
342 | enum precedence); | |
343 | ||
344 | extern void print_subexp_standard (struct expression *, int *, | |
345 | struct ui_file *, enum precedence); | |
346 | ||
f461f5cf PM |
347 | /* Function used to avoid direct calls to fprintf |
348 | in the code generated by the bison parser. */ | |
349 | ||
a0b31db1 | 350 | extern void parser_fprintf (FILE *, const char *, ...) ATTRIBUTE_PRINTF (2, 3); |
f461f5cf | 351 | |
c0201579 JK |
352 | extern int exp_uses_objfile (struct expression *exp, struct objfile *objfile); |
353 | ||
c5aa993b | 354 | #endif /* PARSER_DEFS_H */ |