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c44af4eb | 1 | /* Bison parser for Rust expressions, for GDB. |
e2882c85 | 2 | Copyright (C) 2016-2018 Free Software Foundation, Inc. |
c44af4eb TT |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | /* Removing the last conflict seems difficult. */ | |
20 | %expect 1 | |
21 | ||
22 | %{ | |
23 | ||
24 | #include "defs.h" | |
25 | ||
26 | #include "block.h" | |
27 | #include "charset.h" | |
28 | #include "cp-support.h" | |
c44af4eb TT |
29 | #include "gdb_obstack.h" |
30 | #include "gdb_regex.h" | |
31 | #include "rust-lang.h" | |
32 | #include "parser-defs.h" | |
33 | #include "selftest.h" | |
34 | #include "value.h" | |
35 | #include "vec.h" | |
36 | ||
37 | #define GDB_YY_REMAP_PREFIX rust | |
38 | #include "yy-remap.h" | |
39 | ||
40 | #define RUSTSTYPE YYSTYPE | |
41 | ||
c44af4eb | 42 | struct rust_op; |
3232fabd | 43 | typedef std::vector<const struct rust_op *> rust_op_vector; |
c44af4eb TT |
44 | |
45 | /* A typed integer constant. */ | |
46 | ||
47 | struct typed_val_int | |
48 | { | |
49 | LONGEST val; | |
50 | struct type *type; | |
51 | }; | |
52 | ||
53 | /* A typed floating point constant. */ | |
54 | ||
55 | struct typed_val_float | |
56 | { | |
edd079d9 | 57 | gdb_byte val[16]; |
c44af4eb TT |
58 | struct type *type; |
59 | }; | |
60 | ||
61 | /* An identifier and an expression. This is used to represent one | |
62 | element of a struct initializer. */ | |
63 | ||
64 | struct set_field | |
65 | { | |
66 | struct stoken name; | |
67 | const struct rust_op *init; | |
68 | }; | |
69 | ||
3232fabd | 70 | typedef std::vector<set_field> rust_set_vector; |
c44af4eb TT |
71 | |
72 | static int rustyylex (void); | |
73 | static void rust_push_back (char c); | |
74 | static const char *rust_copy_name (const char *, int); | |
75 | static struct stoken rust_concat3 (const char *, const char *, const char *); | |
76 | static struct stoken make_stoken (const char *); | |
77 | static struct block_symbol rust_lookup_symbol (const char *name, | |
78 | const struct block *block, | |
79 | const domain_enum domain); | |
80 | static struct type *rust_lookup_type (const char *name, | |
81 | const struct block *block); | |
82 | static struct type *rust_type (const char *name); | |
83 | ||
84 | static const struct rust_op *crate_name (const struct rust_op *name); | |
85 | static const struct rust_op *super_name (const struct rust_op *name, | |
86 | unsigned int n_supers); | |
87 | ||
88 | static const struct rust_op *ast_operation (enum exp_opcode opcode, | |
89 | const struct rust_op *left, | |
90 | const struct rust_op *right); | |
91 | static const struct rust_op *ast_compound_assignment | |
92 | (enum exp_opcode opcode, const struct rust_op *left, | |
93 | const struct rust_op *rust_op); | |
94 | static const struct rust_op *ast_literal (struct typed_val_int val); | |
95 | static const struct rust_op *ast_dliteral (struct typed_val_float val); | |
96 | static const struct rust_op *ast_structop (const struct rust_op *left, | |
97 | const char *name, | |
98 | int completing); | |
99 | static const struct rust_op *ast_structop_anonymous | |
100 | (const struct rust_op *left, struct typed_val_int number); | |
101 | static const struct rust_op *ast_unary (enum exp_opcode opcode, | |
102 | const struct rust_op *expr); | |
103 | static const struct rust_op *ast_cast (const struct rust_op *expr, | |
104 | const struct rust_op *type); | |
105 | static const struct rust_op *ast_call_ish (enum exp_opcode opcode, | |
106 | const struct rust_op *expr, | |
3232fabd | 107 | rust_op_vector *params); |
c44af4eb | 108 | static const struct rust_op *ast_path (struct stoken name, |
3232fabd | 109 | rust_op_vector *params); |
c44af4eb TT |
110 | static const struct rust_op *ast_string (struct stoken str); |
111 | static const struct rust_op *ast_struct (const struct rust_op *name, | |
3232fabd | 112 | rust_set_vector *fields); |
c44af4eb | 113 | static const struct rust_op *ast_range (const struct rust_op *lhs, |
6873858b TT |
114 | const struct rust_op *rhs, |
115 | bool inclusive); | |
c44af4eb TT |
116 | static const struct rust_op *ast_array_type (const struct rust_op *lhs, |
117 | struct typed_val_int val); | |
118 | static const struct rust_op *ast_slice_type (const struct rust_op *type); | |
119 | static const struct rust_op *ast_reference_type (const struct rust_op *type); | |
120 | static const struct rust_op *ast_pointer_type (const struct rust_op *type, | |
121 | int is_mut); | |
122 | static const struct rust_op *ast_function_type (const struct rust_op *result, | |
3232fabd TT |
123 | rust_op_vector *params); |
124 | static const struct rust_op *ast_tuple_type (rust_op_vector *params); | |
c44af4eb | 125 | |
3232fabd | 126 | /* The current rust parser. */ |
c44af4eb | 127 | |
3232fabd TT |
128 | struct rust_parser; |
129 | static rust_parser *current_parser; | |
c44af4eb TT |
130 | |
131 | /* A regular expression for matching Rust numbers. This is split up | |
132 | since it is very long and this gives us a way to comment the | |
133 | sections. */ | |
134 | ||
135 | static const char *number_regex_text = | |
136 | /* subexpression 1: allows use of alternation, otherwise uninteresting */ | |
137 | "^(" | |
138 | /* First comes floating point. */ | |
139 | /* Recognize number after the decimal point, with optional | |
140 | exponent and optional type suffix. | |
141 | subexpression 2: allows "?", otherwise uninteresting | |
142 | subexpression 3: if present, type suffix | |
143 | */ | |
144 | "[0-9][0-9_]*\\.[0-9][0-9_]*([eE][-+]?[0-9][0-9_]*)?(f32|f64)?" | |
145 | #define FLOAT_TYPE1 3 | |
146 | "|" | |
147 | /* Recognize exponent without decimal point, with optional type | |
148 | suffix. | |
149 | subexpression 4: if present, type suffix | |
150 | */ | |
151 | #define FLOAT_TYPE2 4 | |
152 | "[0-9][0-9_]*[eE][-+]?[0-9][0-9_]*(f32|f64)?" | |
153 | "|" | |
154 | /* "23." is a valid floating point number, but "23.e5" and | |
155 | "23.f32" are not. So, handle the trailing-. case | |
156 | separately. */ | |
157 | "[0-9][0-9_]*\\." | |
158 | "|" | |
159 | /* Finally come integers. | |
160 | subexpression 5: text of integer | |
161 | subexpression 6: if present, type suffix | |
162 | subexpression 7: allows use of alternation, otherwise uninteresting | |
163 | */ | |
164 | #define INT_TEXT 5 | |
165 | #define INT_TYPE 6 | |
166 | "(0x[a-fA-F0-9_]+|0o[0-7_]+|0b[01_]+|[0-9][0-9_]*)" | |
167 | "([iu](size|8|16|32|64))?" | |
168 | ")"; | |
169 | /* The number of subexpressions to allocate space for, including the | |
170 | "0th" whole match subexpression. */ | |
171 | #define NUM_SUBEXPRESSIONS 8 | |
172 | ||
173 | /* The compiled number-matching regex. */ | |
174 | ||
175 | static regex_t number_regex; | |
176 | ||
3232fabd TT |
177 | /* Obstack for data temporarily allocated during parsing. Points to |
178 | the obstack in the rust_parser, or to a temporary obstack during | |
179 | unit testing. */ | |
180 | ||
181 | static auto_obstack *work_obstack; | |
182 | ||
183 | /* An instance of this is created before parsing, and destroyed when | |
184 | parsing is finished. */ | |
185 | ||
186 | struct rust_parser | |
187 | { | |
188 | rust_parser (struct parser_state *state) | |
189 | : rust_ast (nullptr), | |
190 | pstate (state) | |
191 | { | |
192 | gdb_assert (current_parser == nullptr); | |
193 | current_parser = this; | |
194 | work_obstack = &obstack; | |
195 | } | |
196 | ||
197 | ~rust_parser () | |
198 | { | |
199 | /* Clean up the globals we set. */ | |
200 | current_parser = nullptr; | |
201 | work_obstack = nullptr; | |
202 | } | |
203 | ||
204 | /* Create a new rust_set_vector. The storage for the new vector is | |
205 | managed by this class. */ | |
206 | rust_set_vector *new_set_vector () | |
207 | { | |
208 | rust_set_vector *result = new rust_set_vector; | |
209 | set_vectors.push_back (std::unique_ptr<rust_set_vector> (result)); | |
210 | return result; | |
211 | } | |
212 | ||
213 | /* Create a new rust_ops_vector. The storage for the new vector is | |
214 | managed by this class. */ | |
215 | rust_op_vector *new_op_vector () | |
216 | { | |
217 | rust_op_vector *result = new rust_op_vector; | |
218 | op_vectors.push_back (std::unique_ptr<rust_op_vector> (result)); | |
219 | return result; | |
220 | } | |
221 | ||
222 | /* Return the parser's language. */ | |
223 | const struct language_defn *language () const | |
224 | { | |
225 | return parse_language (pstate); | |
226 | } | |
227 | ||
228 | /* Return the parser's gdbarch. */ | |
229 | struct gdbarch *arch () const | |
230 | { | |
231 | return parse_gdbarch (pstate); | |
232 | } | |
233 | ||
234 | /* A pointer to this is installed globally. */ | |
235 | auto_obstack obstack; | |
236 | ||
237 | /* Result of parsing. Points into obstack. */ | |
238 | const struct rust_op *rust_ast; | |
239 | ||
240 | /* This keeps track of the various vectors we allocate. */ | |
241 | std::vector<std::unique_ptr<rust_set_vector>> set_vectors; | |
242 | std::vector<std::unique_ptr<rust_op_vector>> op_vectors; | |
243 | ||
244 | /* The parser state gdb gave us. */ | |
245 | struct parser_state *pstate; | |
246 | }; | |
c44af4eb TT |
247 | |
248 | %} | |
249 | ||
250 | %union | |
251 | { | |
252 | /* A typed integer constant. */ | |
253 | struct typed_val_int typed_val_int; | |
254 | ||
255 | /* A typed floating point constant. */ | |
256 | struct typed_val_float typed_val_float; | |
257 | ||
258 | /* An identifier or string. */ | |
259 | struct stoken sval; | |
260 | ||
261 | /* A token representing an opcode, like "==". */ | |
262 | enum exp_opcode opcode; | |
263 | ||
264 | /* A list of expressions; for example, the arguments to a function | |
265 | call. */ | |
3232fabd | 266 | rust_op_vector *params; |
c44af4eb TT |
267 | |
268 | /* A list of field initializers. */ | |
3232fabd | 269 | rust_set_vector *field_inits; |
c44af4eb TT |
270 | |
271 | /* A single field initializer. */ | |
272 | struct set_field one_field_init; | |
273 | ||
274 | /* An expression. */ | |
275 | const struct rust_op *op; | |
276 | ||
277 | /* A plain integer, for example used to count the number of | |
278 | "super::" prefixes on a path. */ | |
279 | unsigned int depth; | |
280 | } | |
281 | ||
282 | %{ | |
283 | ||
284 | /* Rust AST operations. We build a tree of these; then lower them | |
285 | to gdb expressions when parsing has completed. */ | |
286 | ||
287 | struct rust_op | |
288 | { | |
289 | /* The opcode. */ | |
290 | enum exp_opcode opcode; | |
291 | /* If OPCODE is OP_TYPE, then this holds information about what type | |
292 | is described by this node. */ | |
293 | enum type_code typecode; | |
294 | /* Indicates whether OPCODE actually represents a compound | |
295 | assignment. For example, if OPCODE is GTGT and this is false, | |
296 | then this rust_op represents an ordinary ">>"; but if this is | |
297 | true, then this rust_op represents ">>=". Unused in other | |
298 | cases. */ | |
299 | unsigned int compound_assignment : 1; | |
300 | /* Only used by a field expression; if set, indicates that the field | |
301 | name occurred at the end of the expression and is eligible for | |
302 | completion. */ | |
303 | unsigned int completing : 1; | |
6873858b TT |
304 | /* For OP_RANGE, indicates whether the range is inclusive or |
305 | exclusive. */ | |
306 | unsigned int inclusive : 1; | |
c44af4eb TT |
307 | /* Operands of expression. Which one is used and how depends on the |
308 | particular opcode. */ | |
309 | RUSTSTYPE left; | |
310 | RUSTSTYPE right; | |
311 | }; | |
312 | ||
313 | %} | |
314 | ||
315 | %token <sval> GDBVAR | |
316 | %token <sval> IDENT | |
317 | %token <sval> COMPLETE | |
318 | %token <typed_val_int> INTEGER | |
319 | %token <typed_val_int> DECIMAL_INTEGER | |
320 | %token <sval> STRING | |
321 | %token <sval> BYTESTRING | |
322 | %token <typed_val_float> FLOAT | |
323 | %token <opcode> COMPOUND_ASSIGN | |
324 | ||
325 | /* Keyword tokens. */ | |
326 | %token <voidval> KW_AS | |
327 | %token <voidval> KW_IF | |
328 | %token <voidval> KW_TRUE | |
329 | %token <voidval> KW_FALSE | |
330 | %token <voidval> KW_SUPER | |
331 | %token <voidval> KW_SELF | |
332 | %token <voidval> KW_MUT | |
333 | %token <voidval> KW_EXTERN | |
334 | %token <voidval> KW_CONST | |
335 | %token <voidval> KW_FN | |
cdf5a07c | 336 | %token <voidval> KW_SIZEOF |
c44af4eb TT |
337 | |
338 | /* Operator tokens. */ | |
339 | %token <voidval> DOTDOT | |
6873858b | 340 | %token <voidval> DOTDOTEQ |
c44af4eb TT |
341 | %token <voidval> OROR |
342 | %token <voidval> ANDAND | |
343 | %token <voidval> EQEQ | |
344 | %token <voidval> NOTEQ | |
345 | %token <voidval> LTEQ | |
346 | %token <voidval> GTEQ | |
347 | %token <voidval> LSH RSH | |
348 | %token <voidval> COLONCOLON | |
349 | %token <voidval> ARROW | |
350 | ||
351 | %type <op> type | |
352 | %type <op> path_for_expr | |
353 | %type <op> identifier_path_for_expr | |
354 | %type <op> path_for_type | |
355 | %type <op> identifier_path_for_type | |
356 | %type <op> just_identifiers_for_type | |
357 | ||
358 | %type <params> maybe_type_list | |
359 | %type <params> type_list | |
360 | ||
361 | %type <depth> super_path | |
362 | ||
363 | %type <op> literal | |
364 | %type <op> expr | |
365 | %type <op> field_expr | |
366 | %type <op> idx_expr | |
367 | %type <op> unop_expr | |
368 | %type <op> binop_expr | |
369 | %type <op> binop_expr_expr | |
370 | %type <op> type_cast_expr | |
371 | %type <op> assignment_expr | |
372 | %type <op> compound_assignment_expr | |
373 | %type <op> paren_expr | |
374 | %type <op> call_expr | |
375 | %type <op> path_expr | |
376 | %type <op> tuple_expr | |
377 | %type <op> unit_expr | |
378 | %type <op> struct_expr | |
379 | %type <op> array_expr | |
380 | %type <op> range_expr | |
381 | ||
382 | %type <params> expr_list | |
383 | %type <params> maybe_expr_list | |
384 | %type <params> paren_expr_list | |
385 | ||
386 | %type <field_inits> struct_expr_list | |
387 | %type <one_field_init> struct_expr_tail | |
388 | ||
389 | /* Precedence. */ | |
6873858b | 390 | %nonassoc DOTDOT DOTDOTEQ |
c44af4eb TT |
391 | %right '=' COMPOUND_ASSIGN |
392 | %left OROR | |
393 | %left ANDAND | |
394 | %nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ | |
395 | %left '|' | |
396 | %left '^' | |
397 | %left '&' | |
398 | %left LSH RSH | |
399 | %left '@' | |
400 | %left '+' '-' | |
401 | %left '*' '/' '%' | |
402 | /* These could be %precedence in Bison, but that isn't a yacc | |
403 | feature. */ | |
404 | %left KW_AS | |
405 | %left UNARY | |
406 | %left '[' '.' '(' | |
407 | ||
408 | %% | |
409 | ||
410 | start: | |
411 | expr | |
412 | { | |
413 | /* If we are completing and see a valid parse, | |
414 | rust_ast will already have been set. */ | |
3232fabd TT |
415 | if (current_parser->rust_ast == NULL) |
416 | current_parser->rust_ast = $1; | |
c44af4eb TT |
417 | } |
418 | ; | |
419 | ||
420 | /* Note that the Rust grammar includes a method_call_expr, but we | |
421 | handle this differently, to avoid a shift/reduce conflict with | |
422 | call_expr. */ | |
423 | expr: | |
424 | literal | |
425 | | path_expr | |
426 | | tuple_expr | |
427 | | unit_expr | |
428 | | struct_expr | |
429 | | field_expr | |
430 | | array_expr | |
431 | | idx_expr | |
432 | | range_expr | |
d8344f3d TT |
433 | | unop_expr /* Must precede call_expr because of ambiguity with |
434 | sizeof. */ | |
c44af4eb TT |
435 | | binop_expr |
436 | | paren_expr | |
437 | | call_expr | |
438 | ; | |
439 | ||
440 | tuple_expr: | |
441 | '(' expr ',' maybe_expr_list ')' | |
442 | { | |
3232fabd | 443 | $4->push_back ($2); |
c44af4eb TT |
444 | error (_("Tuple expressions not supported yet")); |
445 | } | |
446 | ; | |
447 | ||
448 | unit_expr: | |
449 | '(' ')' | |
450 | { | |
451 | struct typed_val_int val; | |
452 | ||
453 | val.type | |
d8344f3d TT |
454 | = (language_lookup_primitive_type |
455 | (current_parser->language (), current_parser->arch (), | |
456 | "()")); | |
c44af4eb TT |
457 | val.val = 0; |
458 | $$ = ast_literal (val); | |
459 | } | |
460 | ; | |
461 | ||
462 | /* To avoid a shift/reduce conflict with call_expr, we don't handle | |
463 | tuple struct expressions here, but instead when examining the | |
464 | AST. */ | |
465 | struct_expr: | |
466 | path_for_expr '{' struct_expr_list '}' | |
467 | { $$ = ast_struct ($1, $3); } | |
468 | ; | |
469 | ||
470 | struct_expr_tail: | |
471 | DOTDOT expr | |
472 | { | |
473 | struct set_field sf; | |
474 | ||
475 | sf.name.ptr = NULL; | |
476 | sf.name.length = 0; | |
477 | sf.init = $2; | |
478 | ||
479 | $$ = sf; | |
480 | } | |
481 | | IDENT ':' expr | |
482 | { | |
483 | struct set_field sf; | |
484 | ||
485 | sf.name = $1; | |
486 | sf.init = $3; | |
487 | $$ = sf; | |
488 | } | |
92630041 TT |
489 | | IDENT |
490 | { | |
491 | struct set_field sf; | |
492 | ||
493 | sf.name = $1; | |
494 | sf.init = ast_path ($1, NULL); | |
495 | $$ = sf; | |
496 | } | |
c44af4eb TT |
497 | ; |
498 | ||
c44af4eb | 499 | struct_expr_list: |
12df5c00 TT |
500 | /* %empty */ |
501 | { | |
3232fabd | 502 | $$ = current_parser->new_set_vector (); |
12df5c00 TT |
503 | } |
504 | | struct_expr_tail | |
c44af4eb | 505 | { |
3232fabd TT |
506 | rust_set_vector *result = current_parser->new_set_vector (); |
507 | result->push_back ($1); | |
c44af4eb TT |
508 | $$ = result; |
509 | } | |
510 | | IDENT ':' expr ',' struct_expr_list | |
511 | { | |
512 | struct set_field sf; | |
513 | ||
514 | sf.name = $1; | |
515 | sf.init = $3; | |
3232fabd | 516 | $5->push_back (sf); |
c44af4eb TT |
517 | $$ = $5; |
518 | } | |
92630041 TT |
519 | | IDENT ',' struct_expr_list |
520 | { | |
521 | struct set_field sf; | |
522 | ||
523 | sf.name = $1; | |
524 | sf.init = ast_path ($1, NULL); | |
525 | $3->push_back (sf); | |
526 | $$ = $3; | |
527 | } | |
c44af4eb TT |
528 | ; |
529 | ||
530 | array_expr: | |
531 | '[' KW_MUT expr_list ']' | |
532 | { $$ = ast_call_ish (OP_ARRAY, NULL, $3); } | |
533 | | '[' expr_list ']' | |
534 | { $$ = ast_call_ish (OP_ARRAY, NULL, $2); } | |
535 | | '[' KW_MUT expr ';' expr ']' | |
536 | { $$ = ast_operation (OP_RUST_ARRAY, $3, $5); } | |
537 | | '[' expr ';' expr ']' | |
538 | { $$ = ast_operation (OP_RUST_ARRAY, $2, $4); } | |
539 | ; | |
540 | ||
541 | range_expr: | |
542 | expr DOTDOT | |
6873858b | 543 | { $$ = ast_range ($1, NULL, false); } |
c44af4eb | 544 | | expr DOTDOT expr |
6873858b TT |
545 | { $$ = ast_range ($1, $3, false); } |
546 | | expr DOTDOTEQ expr | |
547 | { $$ = ast_range ($1, $3, true); } | |
c44af4eb | 548 | | DOTDOT expr |
6873858b TT |
549 | { $$ = ast_range (NULL, $2, false); } |
550 | | DOTDOTEQ expr | |
551 | { $$ = ast_range (NULL, $2, true); } | |
c44af4eb | 552 | | DOTDOT |
6873858b | 553 | { $$ = ast_range (NULL, NULL, false); } |
c44af4eb TT |
554 | ; |
555 | ||
556 | literal: | |
557 | INTEGER | |
558 | { $$ = ast_literal ($1); } | |
559 | | DECIMAL_INTEGER | |
560 | { $$ = ast_literal ($1); } | |
561 | | FLOAT | |
562 | { $$ = ast_dliteral ($1); } | |
563 | | STRING | |
564 | { | |
565 | const struct rust_op *str = ast_string ($1); | |
c44af4eb TT |
566 | struct set_field field; |
567 | struct typed_val_int val; | |
568 | struct stoken token; | |
569 | ||
3232fabd | 570 | rust_set_vector *fields = current_parser->new_set_vector (); |
c44af4eb TT |
571 | |
572 | /* Wrap the raw string in the &str struct. */ | |
573 | field.name.ptr = "data_ptr"; | |
574 | field.name.length = strlen (field.name.ptr); | |
575 | field.init = ast_unary (UNOP_ADDR, ast_string ($1)); | |
3232fabd | 576 | fields->push_back (field); |
c44af4eb TT |
577 | |
578 | val.type = rust_type ("usize"); | |
579 | val.val = $1.length; | |
580 | ||
581 | field.name.ptr = "length"; | |
582 | field.name.length = strlen (field.name.ptr); | |
583 | field.init = ast_literal (val); | |
3232fabd | 584 | fields->push_back (field); |
c44af4eb TT |
585 | |
586 | token.ptr = "&str"; | |
587 | token.length = strlen (token.ptr); | |
588 | $$ = ast_struct (ast_path (token, NULL), fields); | |
589 | } | |
590 | | BYTESTRING | |
591 | { $$ = ast_string ($1); } | |
592 | | KW_TRUE | |
593 | { | |
594 | struct typed_val_int val; | |
595 | ||
3232fabd TT |
596 | val.type = language_bool_type (current_parser->language (), |
597 | current_parser->arch ()); | |
c44af4eb TT |
598 | val.val = 1; |
599 | $$ = ast_literal (val); | |
600 | } | |
601 | | KW_FALSE | |
602 | { | |
603 | struct typed_val_int val; | |
604 | ||
3232fabd TT |
605 | val.type = language_bool_type (current_parser->language (), |
606 | current_parser->arch ()); | |
c44af4eb TT |
607 | val.val = 0; |
608 | $$ = ast_literal (val); | |
609 | } | |
610 | ; | |
611 | ||
612 | field_expr: | |
613 | expr '.' IDENT | |
614 | { $$ = ast_structop ($1, $3.ptr, 0); } | |
615 | | expr '.' COMPLETE | |
616 | { | |
617 | $$ = ast_structop ($1, $3.ptr, 1); | |
3232fabd | 618 | current_parser->rust_ast = $$; |
c44af4eb TT |
619 | } |
620 | | expr '.' DECIMAL_INTEGER | |
621 | { $$ = ast_structop_anonymous ($1, $3); } | |
622 | ; | |
623 | ||
624 | idx_expr: | |
625 | expr '[' expr ']' | |
626 | { $$ = ast_operation (BINOP_SUBSCRIPT, $1, $3); } | |
627 | ; | |
628 | ||
629 | unop_expr: | |
630 | '+' expr %prec UNARY | |
631 | { $$ = ast_unary (UNOP_PLUS, $2); } | |
632 | ||
633 | | '-' expr %prec UNARY | |
634 | { $$ = ast_unary (UNOP_NEG, $2); } | |
635 | ||
636 | | '!' expr %prec UNARY | |
637 | { | |
638 | /* Note that we provide a Rust-specific evaluator | |
639 | override for UNOP_COMPLEMENT, so it can do the | |
640 | right thing for both bool and integral | |
641 | values. */ | |
642 | $$ = ast_unary (UNOP_COMPLEMENT, $2); | |
643 | } | |
644 | ||
645 | | '*' expr %prec UNARY | |
646 | { $$ = ast_unary (UNOP_IND, $2); } | |
647 | ||
648 | | '&' expr %prec UNARY | |
649 | { $$ = ast_unary (UNOP_ADDR, $2); } | |
650 | ||
651 | | '&' KW_MUT expr %prec UNARY | |
652 | { $$ = ast_unary (UNOP_ADDR, $3); } | |
d8344f3d TT |
653 | | KW_SIZEOF '(' expr ')' %prec UNARY |
654 | { $$ = ast_unary (UNOP_SIZEOF, $3); } | |
c44af4eb TT |
655 | ; |
656 | ||
657 | binop_expr: | |
658 | binop_expr_expr | |
659 | | type_cast_expr | |
660 | | assignment_expr | |
661 | | compound_assignment_expr | |
662 | ; | |
663 | ||
664 | binop_expr_expr: | |
665 | expr '*' expr | |
666 | { $$ = ast_operation (BINOP_MUL, $1, $3); } | |
667 | ||
668 | | expr '@' expr | |
669 | { $$ = ast_operation (BINOP_REPEAT, $1, $3); } | |
670 | ||
671 | | expr '/' expr | |
672 | { $$ = ast_operation (BINOP_DIV, $1, $3); } | |
673 | ||
674 | | expr '%' expr | |
675 | { $$ = ast_operation (BINOP_REM, $1, $3); } | |
676 | ||
677 | | expr '<' expr | |
678 | { $$ = ast_operation (BINOP_LESS, $1, $3); } | |
679 | ||
680 | | expr '>' expr | |
681 | { $$ = ast_operation (BINOP_GTR, $1, $3); } | |
682 | ||
683 | | expr '&' expr | |
684 | { $$ = ast_operation (BINOP_BITWISE_AND, $1, $3); } | |
685 | ||
686 | | expr '|' expr | |
687 | { $$ = ast_operation (BINOP_BITWISE_IOR, $1, $3); } | |
688 | ||
689 | | expr '^' expr | |
690 | { $$ = ast_operation (BINOP_BITWISE_XOR, $1, $3); } | |
691 | ||
692 | | expr '+' expr | |
693 | { $$ = ast_operation (BINOP_ADD, $1, $3); } | |
694 | ||
695 | | expr '-' expr | |
696 | { $$ = ast_operation (BINOP_SUB, $1, $3); } | |
697 | ||
698 | | expr OROR expr | |
699 | { $$ = ast_operation (BINOP_LOGICAL_OR, $1, $3); } | |
700 | ||
701 | | expr ANDAND expr | |
702 | { $$ = ast_operation (BINOP_LOGICAL_AND, $1, $3); } | |
703 | ||
704 | | expr EQEQ expr | |
705 | { $$ = ast_operation (BINOP_EQUAL, $1, $3); } | |
706 | ||
707 | | expr NOTEQ expr | |
708 | { $$ = ast_operation (BINOP_NOTEQUAL, $1, $3); } | |
709 | ||
710 | | expr LTEQ expr | |
711 | { $$ = ast_operation (BINOP_LEQ, $1, $3); } | |
712 | ||
713 | | expr GTEQ expr | |
714 | { $$ = ast_operation (BINOP_GEQ, $1, $3); } | |
715 | ||
716 | | expr LSH expr | |
717 | { $$ = ast_operation (BINOP_LSH, $1, $3); } | |
718 | ||
719 | | expr RSH expr | |
720 | { $$ = ast_operation (BINOP_RSH, $1, $3); } | |
721 | ; | |
722 | ||
723 | type_cast_expr: | |
724 | expr KW_AS type | |
725 | { $$ = ast_cast ($1, $3); } | |
726 | ; | |
727 | ||
728 | assignment_expr: | |
729 | expr '=' expr | |
730 | { $$ = ast_operation (BINOP_ASSIGN, $1, $3); } | |
731 | ; | |
732 | ||
733 | compound_assignment_expr: | |
734 | expr COMPOUND_ASSIGN expr | |
735 | { $$ = ast_compound_assignment ($2, $1, $3); } | |
736 | ||
737 | ; | |
738 | ||
739 | paren_expr: | |
740 | '(' expr ')' | |
741 | { $$ = $2; } | |
742 | ; | |
743 | ||
744 | expr_list: | |
745 | expr | |
746 | { | |
3232fabd TT |
747 | $$ = current_parser->new_op_vector (); |
748 | $$->push_back ($1); | |
c44af4eb TT |
749 | } |
750 | | expr_list ',' expr | |
751 | { | |
3232fabd | 752 | $1->push_back ($3); |
c44af4eb TT |
753 | $$ = $1; |
754 | } | |
755 | ; | |
756 | ||
757 | maybe_expr_list: | |
758 | /* %empty */ | |
759 | { | |
760 | /* The result can't be NULL. */ | |
3232fabd | 761 | $$ = current_parser->new_op_vector (); |
c44af4eb TT |
762 | } |
763 | | expr_list | |
764 | { $$ = $1; } | |
765 | ; | |
766 | ||
767 | paren_expr_list: | |
d8344f3d | 768 | '(' maybe_expr_list ')' |
c44af4eb TT |
769 | { $$ = $2; } |
770 | ; | |
771 | ||
772 | call_expr: | |
773 | expr paren_expr_list | |
774 | { $$ = ast_call_ish (OP_FUNCALL, $1, $2); } | |
775 | ; | |
776 | ||
777 | maybe_self_path: | |
778 | /* %empty */ | |
779 | | KW_SELF COLONCOLON | |
780 | ; | |
781 | ||
782 | super_path: | |
783 | KW_SUPER COLONCOLON | |
784 | { $$ = 1; } | |
785 | | super_path KW_SUPER COLONCOLON | |
786 | { $$ = $1 + 1; } | |
787 | ; | |
788 | ||
789 | path_expr: | |
790 | path_for_expr | |
791 | { $$ = $1; } | |
792 | | GDBVAR | |
793 | { $$ = ast_path ($1, NULL); } | |
794 | | KW_SELF | |
795 | { $$ = ast_path (make_stoken ("self"), NULL); } | |
796 | ; | |
797 | ||
798 | path_for_expr: | |
799 | identifier_path_for_expr | |
800 | | KW_SELF COLONCOLON identifier_path_for_expr | |
801 | { $$ = super_name ($3, 0); } | |
802 | | maybe_self_path super_path identifier_path_for_expr | |
803 | { $$ = super_name ($3, $2); } | |
804 | | COLONCOLON identifier_path_for_expr | |
805 | { $$ = crate_name ($2); } | |
806 | | KW_EXTERN identifier_path_for_expr | |
807 | { | |
808 | /* This is a gdb extension to make it possible to | |
809 | refer to items in other crates. It just bypasses | |
810 | adding the current crate to the front of the | |
811 | name. */ | |
812 | $$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL), | |
813 | $2->right.params); | |
814 | } | |
815 | ; | |
816 | ||
817 | identifier_path_for_expr: | |
818 | IDENT | |
819 | { $$ = ast_path ($1, NULL); } | |
820 | | identifier_path_for_expr COLONCOLON IDENT | |
821 | { | |
822 | $$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::", | |
823 | $3.ptr), | |
824 | NULL); | |
825 | } | |
826 | | identifier_path_for_expr COLONCOLON '<' type_list '>' | |
827 | { $$ = ast_path ($1->left.sval, $4); } | |
828 | | identifier_path_for_expr COLONCOLON '<' type_list RSH | |
829 | { | |
830 | $$ = ast_path ($1->left.sval, $4); | |
831 | rust_push_back ('>'); | |
832 | } | |
833 | ; | |
834 | ||
835 | path_for_type: | |
836 | identifier_path_for_type | |
837 | | KW_SELF COLONCOLON identifier_path_for_type | |
838 | { $$ = super_name ($3, 0); } | |
839 | | maybe_self_path super_path identifier_path_for_type | |
840 | { $$ = super_name ($3, $2); } | |
841 | | COLONCOLON identifier_path_for_type | |
842 | { $$ = crate_name ($2); } | |
843 | | KW_EXTERN identifier_path_for_type | |
844 | { | |
845 | /* This is a gdb extension to make it possible to | |
846 | refer to items in other crates. It just bypasses | |
847 | adding the current crate to the front of the | |
848 | name. */ | |
849 | $$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL), | |
850 | $2->right.params); | |
851 | } | |
852 | ; | |
853 | ||
854 | just_identifiers_for_type: | |
855 | IDENT | |
d8344f3d | 856 | { $$ = ast_path ($1, NULL); } |
c44af4eb TT |
857 | | just_identifiers_for_type COLONCOLON IDENT |
858 | { | |
859 | $$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::", | |
860 | $3.ptr), | |
861 | NULL); | |
862 | } | |
863 | ; | |
864 | ||
865 | identifier_path_for_type: | |
866 | just_identifiers_for_type | |
867 | | just_identifiers_for_type '<' type_list '>' | |
868 | { $$ = ast_path ($1->left.sval, $3); } | |
869 | | just_identifiers_for_type '<' type_list RSH | |
870 | { | |
871 | $$ = ast_path ($1->left.sval, $3); | |
872 | rust_push_back ('>'); | |
873 | } | |
874 | ; | |
875 | ||
876 | type: | |
877 | path_for_type | |
878 | | '[' type ';' INTEGER ']' | |
879 | { $$ = ast_array_type ($2, $4); } | |
880 | | '[' type ';' DECIMAL_INTEGER ']' | |
881 | { $$ = ast_array_type ($2, $4); } | |
882 | | '&' '[' type ']' | |
883 | { $$ = ast_slice_type ($3); } | |
884 | | '&' type | |
885 | { $$ = ast_reference_type ($2); } | |
886 | | '*' KW_MUT type | |
887 | { $$ = ast_pointer_type ($3, 1); } | |
888 | | '*' KW_CONST type | |
889 | { $$ = ast_pointer_type ($3, 0); } | |
890 | | KW_FN '(' maybe_type_list ')' ARROW type | |
891 | { $$ = ast_function_type ($6, $3); } | |
892 | | '(' maybe_type_list ')' | |
893 | { $$ = ast_tuple_type ($2); } | |
894 | ; | |
895 | ||
896 | maybe_type_list: | |
897 | /* %empty */ | |
898 | { $$ = NULL; } | |
899 | | type_list | |
900 | { $$ = $1; } | |
901 | ; | |
902 | ||
903 | type_list: | |
904 | type | |
905 | { | |
3232fabd TT |
906 | rust_op_vector *result = current_parser->new_op_vector (); |
907 | result->push_back ($1); | |
c44af4eb TT |
908 | $$ = result; |
909 | } | |
910 | | type_list ',' type | |
911 | { | |
3232fabd | 912 | $1->push_back ($3); |
c44af4eb TT |
913 | $$ = $1; |
914 | } | |
915 | ; | |
916 | ||
917 | %% | |
918 | ||
919 | /* A struct of this type is used to describe a token. */ | |
920 | ||
921 | struct token_info | |
922 | { | |
923 | const char *name; | |
924 | int value; | |
925 | enum exp_opcode opcode; | |
926 | }; | |
927 | ||
928 | /* Identifier tokens. */ | |
929 | ||
930 | static const struct token_info identifier_tokens[] = | |
931 | { | |
932 | { "as", KW_AS, OP_NULL }, | |
933 | { "false", KW_FALSE, OP_NULL }, | |
934 | { "if", 0, OP_NULL }, | |
935 | { "mut", KW_MUT, OP_NULL }, | |
936 | { "const", KW_CONST, OP_NULL }, | |
937 | { "self", KW_SELF, OP_NULL }, | |
938 | { "super", KW_SUPER, OP_NULL }, | |
939 | { "true", KW_TRUE, OP_NULL }, | |
940 | { "extern", KW_EXTERN, OP_NULL }, | |
941 | { "fn", KW_FN, OP_NULL }, | |
cdf5a07c | 942 | { "sizeof", KW_SIZEOF, OP_NULL }, |
c44af4eb TT |
943 | }; |
944 | ||
945 | /* Operator tokens, sorted longest first. */ | |
946 | ||
947 | static const struct token_info operator_tokens[] = | |
948 | { | |
949 | { ">>=", COMPOUND_ASSIGN, BINOP_RSH }, | |
950 | { "<<=", COMPOUND_ASSIGN, BINOP_LSH }, | |
951 | ||
952 | { "<<", LSH, OP_NULL }, | |
953 | { ">>", RSH, OP_NULL }, | |
954 | { "&&", ANDAND, OP_NULL }, | |
955 | { "||", OROR, OP_NULL }, | |
956 | { "==", EQEQ, OP_NULL }, | |
957 | { "!=", NOTEQ, OP_NULL }, | |
958 | { "<=", LTEQ, OP_NULL }, | |
959 | { ">=", GTEQ, OP_NULL }, | |
960 | { "+=", COMPOUND_ASSIGN, BINOP_ADD }, | |
961 | { "-=", COMPOUND_ASSIGN, BINOP_SUB }, | |
962 | { "*=", COMPOUND_ASSIGN, BINOP_MUL }, | |
963 | { "/=", COMPOUND_ASSIGN, BINOP_DIV }, | |
964 | { "%=", COMPOUND_ASSIGN, BINOP_REM }, | |
965 | { "&=", COMPOUND_ASSIGN, BINOP_BITWISE_AND }, | |
966 | { "|=", COMPOUND_ASSIGN, BINOP_BITWISE_IOR }, | |
967 | { "^=", COMPOUND_ASSIGN, BINOP_BITWISE_XOR }, | |
6873858b | 968 | { "..=", DOTDOTEQ, OP_NULL }, |
c44af4eb TT |
969 | |
970 | { "::", COLONCOLON, OP_NULL }, | |
971 | { "..", DOTDOT, OP_NULL }, | |
972 | { "->", ARROW, OP_NULL } | |
973 | }; | |
974 | ||
975 | /* Helper function to copy to the name obstack. */ | |
976 | ||
977 | static const char * | |
978 | rust_copy_name (const char *name, int len) | |
979 | { | |
3232fabd | 980 | return (const char *) obstack_copy0 (work_obstack, name, len); |
c44af4eb TT |
981 | } |
982 | ||
983 | /* Helper function to make an stoken from a C string. */ | |
984 | ||
985 | static struct stoken | |
986 | make_stoken (const char *p) | |
987 | { | |
988 | struct stoken result; | |
989 | ||
990 | result.ptr = p; | |
991 | result.length = strlen (result.ptr); | |
992 | return result; | |
993 | } | |
994 | ||
995 | /* Helper function to concatenate three strings on the name | |
996 | obstack. */ | |
997 | ||
998 | static struct stoken | |
999 | rust_concat3 (const char *s1, const char *s2, const char *s3) | |
1000 | { | |
3232fabd | 1001 | return make_stoken (obconcat (work_obstack, s1, s2, s3, (char *) NULL)); |
c44af4eb TT |
1002 | } |
1003 | ||
1004 | /* Return an AST node referring to NAME, but relative to the crate's | |
1005 | name. */ | |
1006 | ||
1007 | static const struct rust_op * | |
1008 | crate_name (const struct rust_op *name) | |
1009 | { | |
03c85b11 | 1010 | std::string crate = rust_crate_for_block (expression_context_block); |
c44af4eb TT |
1011 | struct stoken result; |
1012 | ||
1013 | gdb_assert (name->opcode == OP_VAR_VALUE); | |
1014 | ||
03c85b11 | 1015 | if (crate.empty ()) |
c44af4eb | 1016 | error (_("Could not find crate for current location")); |
3232fabd | 1017 | result = make_stoken (obconcat (work_obstack, "::", crate.c_str (), "::", |
c44af4eb | 1018 | name->left.sval.ptr, (char *) NULL)); |
c44af4eb TT |
1019 | |
1020 | return ast_path (result, name->right.params); | |
1021 | } | |
1022 | ||
1023 | /* Create an AST node referring to a "super::" qualified name. IDENT | |
1024 | is the base name and N_SUPERS is how many "super::"s were | |
1025 | provided. N_SUPERS can be zero. */ | |
1026 | ||
1027 | static const struct rust_op * | |
1028 | super_name (const struct rust_op *ident, unsigned int n_supers) | |
1029 | { | |
1030 | const char *scope = block_scope (expression_context_block); | |
1031 | int offset; | |
1032 | ||
1033 | gdb_assert (ident->opcode == OP_VAR_VALUE); | |
1034 | ||
1035 | if (scope[0] == '\0') | |
1036 | error (_("Couldn't find namespace scope for self::")); | |
1037 | ||
1038 | if (n_supers > 0) | |
1039 | { | |
c44af4eb | 1040 | int len; |
8001f118 | 1041 | std::vector<int> offsets; |
78cc6c2d | 1042 | unsigned int current_len; |
c44af4eb | 1043 | |
c44af4eb | 1044 | current_len = cp_find_first_component (scope); |
c44af4eb TT |
1045 | while (scope[current_len] != '\0') |
1046 | { | |
8001f118 | 1047 | offsets.push_back (current_len); |
c44af4eb | 1048 | gdb_assert (scope[current_len] == ':'); |
c44af4eb TT |
1049 | /* The "::". */ |
1050 | current_len += 2; | |
1051 | current_len += cp_find_first_component (scope | |
1052 | + current_len); | |
1053 | } | |
1054 | ||
8001f118 | 1055 | len = offsets.size (); |
c44af4eb TT |
1056 | if (n_supers >= len) |
1057 | error (_("Too many super:: uses from '%s'"), scope); | |
1058 | ||
8001f118 | 1059 | offset = offsets[len - n_supers]; |
c44af4eb TT |
1060 | } |
1061 | else | |
1062 | offset = strlen (scope); | |
1063 | ||
3232fabd TT |
1064 | obstack_grow (work_obstack, "::", 2); |
1065 | obstack_grow (work_obstack, scope, offset); | |
1066 | obstack_grow (work_obstack, "::", 2); | |
1067 | obstack_grow0 (work_obstack, ident->left.sval.ptr, ident->left.sval.length); | |
c44af4eb | 1068 | |
3232fabd | 1069 | return ast_path (make_stoken ((const char *) obstack_finish (work_obstack)), |
c44af4eb TT |
1070 | ident->right.params); |
1071 | } | |
1072 | ||
aee1fcdf | 1073 | /* A helper that updates the innermost block as appropriate. */ |
c44af4eb TT |
1074 | |
1075 | static void | |
1076 | update_innermost_block (struct block_symbol sym) | |
1077 | { | |
aee1fcdf AB |
1078 | if (symbol_read_needs_frame (sym.symbol)) |
1079 | innermost_block.update (sym); | |
c44af4eb TT |
1080 | } |
1081 | ||
1082 | /* A helper to look up a Rust type, or fail. This only works for | |
1083 | types defined by rust_language_arch_info. */ | |
1084 | ||
1085 | static struct type * | |
1086 | rust_type (const char *name) | |
1087 | { | |
1088 | struct type *type; | |
1089 | ||
3232fabd TT |
1090 | type = language_lookup_primitive_type (current_parser->language (), |
1091 | current_parser->arch (), | |
c44af4eb TT |
1092 | name); |
1093 | if (type == NULL) | |
1094 | error (_("Could not find Rust type %s"), name); | |
1095 | return type; | |
1096 | } | |
1097 | ||
1098 | /* Lex a hex number with at least MIN digits and at most MAX | |
1099 | digits. */ | |
1100 | ||
1101 | static uint32_t | |
1102 | lex_hex (int min, int max) | |
1103 | { | |
1104 | uint32_t result = 0; | |
1105 | int len = 0; | |
1106 | /* We only want to stop at MAX if we're lexing a byte escape. */ | |
1107 | int check_max = min == max; | |
1108 | ||
1109 | while ((check_max ? len <= max : 1) | |
1110 | && ((lexptr[0] >= 'a' && lexptr[0] <= 'f') | |
1111 | || (lexptr[0] >= 'A' && lexptr[0] <= 'F') | |
1112 | || (lexptr[0] >= '0' && lexptr[0] <= '9'))) | |
1113 | { | |
1114 | result *= 16; | |
1115 | if (lexptr[0] >= 'a' && lexptr[0] <= 'f') | |
1116 | result = result + 10 + lexptr[0] - 'a'; | |
1117 | else if (lexptr[0] >= 'A' && lexptr[0] <= 'F') | |
1118 | result = result + 10 + lexptr[0] - 'A'; | |
1119 | else | |
1120 | result = result + lexptr[0] - '0'; | |
1121 | ++lexptr; | |
1122 | ++len; | |
1123 | } | |
1124 | ||
1125 | if (len < min) | |
1126 | error (_("Not enough hex digits seen")); | |
1127 | if (len > max) | |
1128 | { | |
1129 | gdb_assert (min != max); | |
1130 | error (_("Overlong hex escape")); | |
1131 | } | |
1132 | ||
1133 | return result; | |
1134 | } | |
1135 | ||
1136 | /* Lex an escape. IS_BYTE is true if we're lexing a byte escape; | |
1137 | otherwise we're lexing a character escape. */ | |
1138 | ||
1139 | static uint32_t | |
1140 | lex_escape (int is_byte) | |
1141 | { | |
1142 | uint32_t result; | |
1143 | ||
1144 | gdb_assert (lexptr[0] == '\\'); | |
1145 | ++lexptr; | |
1146 | switch (lexptr[0]) | |
1147 | { | |
1148 | case 'x': | |
1149 | ++lexptr; | |
1150 | result = lex_hex (2, 2); | |
1151 | break; | |
1152 | ||
1153 | case 'u': | |
1154 | if (is_byte) | |
1155 | error (_("Unicode escape in byte literal")); | |
1156 | ++lexptr; | |
1157 | if (lexptr[0] != '{') | |
1158 | error (_("Missing '{' in Unicode escape")); | |
1159 | ++lexptr; | |
1160 | result = lex_hex (1, 6); | |
1161 | /* Could do range checks here. */ | |
1162 | if (lexptr[0] != '}') | |
1163 | error (_("Missing '}' in Unicode escape")); | |
1164 | ++lexptr; | |
1165 | break; | |
1166 | ||
1167 | case 'n': | |
1168 | result = '\n'; | |
1169 | ++lexptr; | |
1170 | break; | |
1171 | case 'r': | |
1172 | result = '\r'; | |
1173 | ++lexptr; | |
1174 | break; | |
1175 | case 't': | |
1176 | result = '\t'; | |
1177 | ++lexptr; | |
1178 | break; | |
1179 | case '\\': | |
1180 | result = '\\'; | |
1181 | ++lexptr; | |
1182 | break; | |
1183 | case '0': | |
1184 | result = '\0'; | |
1185 | ++lexptr; | |
1186 | break; | |
1187 | case '\'': | |
1188 | result = '\''; | |
1189 | ++lexptr; | |
1190 | break; | |
1191 | case '"': | |
1192 | result = '"'; | |
1193 | ++lexptr; | |
1194 | break; | |
1195 | ||
1196 | default: | |
1197 | error (_("Invalid escape \\%c in literal"), lexptr[0]); | |
1198 | } | |
1199 | ||
1200 | return result; | |
1201 | } | |
1202 | ||
1203 | /* Lex a character constant. */ | |
1204 | ||
1205 | static int | |
1206 | lex_character (void) | |
1207 | { | |
1208 | int is_byte = 0; | |
1209 | uint32_t value; | |
1210 | ||
1211 | if (lexptr[0] == 'b') | |
1212 | { | |
1213 | is_byte = 1; | |
1214 | ++lexptr; | |
1215 | } | |
1216 | gdb_assert (lexptr[0] == '\''); | |
1217 | ++lexptr; | |
1218 | /* This should handle UTF-8 here. */ | |
1219 | if (lexptr[0] == '\\') | |
1220 | value = lex_escape (is_byte); | |
1221 | else | |
1222 | { | |
1223 | value = lexptr[0] & 0xff; | |
1224 | ++lexptr; | |
1225 | } | |
1226 | ||
1227 | if (lexptr[0] != '\'') | |
1228 | error (_("Unterminated character literal")); | |
1229 | ++lexptr; | |
1230 | ||
1231 | rustyylval.typed_val_int.val = value; | |
1232 | rustyylval.typed_val_int.type = rust_type (is_byte ? "u8" : "char"); | |
1233 | ||
1234 | return INTEGER; | |
1235 | } | |
1236 | ||
1237 | /* Return the offset of the double quote if STR looks like the start | |
1238 | of a raw string, or 0 if STR does not start a raw string. */ | |
1239 | ||
1240 | static int | |
1241 | starts_raw_string (const char *str) | |
1242 | { | |
1243 | const char *save = str; | |
1244 | ||
1245 | if (str[0] != 'r') | |
1246 | return 0; | |
1247 | ++str; | |
1248 | while (str[0] == '#') | |
1249 | ++str; | |
1250 | if (str[0] == '"') | |
1251 | return str - save; | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | /* Return true if STR looks like the end of a raw string that had N | |
1256 | hashes at the start. */ | |
1257 | ||
65c40c95 | 1258 | static bool |
c44af4eb TT |
1259 | ends_raw_string (const char *str, int n) |
1260 | { | |
1261 | int i; | |
1262 | ||
1263 | gdb_assert (str[0] == '"'); | |
1264 | for (i = 0; i < n; ++i) | |
1265 | if (str[i + 1] != '#') | |
65c40c95 TT |
1266 | return false; |
1267 | return true; | |
c44af4eb TT |
1268 | } |
1269 | ||
1270 | /* Lex a string constant. */ | |
1271 | ||
1272 | static int | |
1273 | lex_string (void) | |
1274 | { | |
1275 | int is_byte = lexptr[0] == 'b'; | |
1276 | int raw_length; | |
c44af4eb TT |
1277 | |
1278 | if (is_byte) | |
1279 | ++lexptr; | |
1280 | raw_length = starts_raw_string (lexptr); | |
1281 | lexptr += raw_length; | |
1282 | gdb_assert (lexptr[0] == '"'); | |
1283 | ++lexptr; | |
1284 | ||
1285 | while (1) | |
1286 | { | |
1287 | uint32_t value; | |
1288 | ||
1289 | if (raw_length > 0) | |
1290 | { | |
1291 | if (lexptr[0] == '"' && ends_raw_string (lexptr, raw_length - 1)) | |
1292 | { | |
1293 | /* Exit with lexptr pointing after the final "#". */ | |
1294 | lexptr += raw_length; | |
1295 | break; | |
1296 | } | |
1297 | else if (lexptr[0] == '\0') | |
1298 | error (_("Unexpected EOF in string")); | |
1299 | ||
1300 | value = lexptr[0] & 0xff; | |
1301 | if (is_byte && value > 127) | |
1302 | error (_("Non-ASCII value in raw byte string")); | |
3232fabd | 1303 | obstack_1grow (work_obstack, value); |
c44af4eb TT |
1304 | |
1305 | ++lexptr; | |
1306 | } | |
1307 | else if (lexptr[0] == '"') | |
1308 | { | |
1309 | /* Make sure to skip the quote. */ | |
1310 | ++lexptr; | |
1311 | break; | |
1312 | } | |
1313 | else if (lexptr[0] == '\\') | |
1314 | { | |
1315 | value = lex_escape (is_byte); | |
1316 | ||
1317 | if (is_byte) | |
3232fabd | 1318 | obstack_1grow (work_obstack, value); |
c44af4eb TT |
1319 | else |
1320 | convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value, | |
1321 | sizeof (value), sizeof (value), | |
3232fabd | 1322 | work_obstack, translit_none); |
c44af4eb TT |
1323 | } |
1324 | else if (lexptr[0] == '\0') | |
1325 | error (_("Unexpected EOF in string")); | |
1326 | else | |
1327 | { | |
1328 | value = lexptr[0] & 0xff; | |
1329 | if (is_byte && value > 127) | |
1330 | error (_("Non-ASCII value in byte string")); | |
3232fabd | 1331 | obstack_1grow (work_obstack, value); |
c44af4eb TT |
1332 | ++lexptr; |
1333 | } | |
1334 | } | |
1335 | ||
3232fabd TT |
1336 | rustyylval.sval.length = obstack_object_size (work_obstack); |
1337 | rustyylval.sval.ptr = (const char *) obstack_finish (work_obstack); | |
c44af4eb TT |
1338 | return is_byte ? BYTESTRING : STRING; |
1339 | } | |
1340 | ||
1341 | /* Return true if STRING starts with whitespace followed by a digit. */ | |
1342 | ||
65c40c95 | 1343 | static bool |
c44af4eb TT |
1344 | space_then_number (const char *string) |
1345 | { | |
1346 | const char *p = string; | |
1347 | ||
1348 | while (p[0] == ' ' || p[0] == '\t') | |
1349 | ++p; | |
1350 | if (p == string) | |
65c40c95 | 1351 | return false; |
c44af4eb TT |
1352 | |
1353 | return *p >= '0' && *p <= '9'; | |
1354 | } | |
1355 | ||
1356 | /* Return true if C can start an identifier. */ | |
1357 | ||
65c40c95 | 1358 | static bool |
c44af4eb TT |
1359 | rust_identifier_start_p (char c) |
1360 | { | |
1361 | return ((c >= 'a' && c <= 'z') | |
1362 | || (c >= 'A' && c <= 'Z') | |
1363 | || c == '_' | |
1364 | || c == '$'); | |
1365 | } | |
1366 | ||
1367 | /* Lex an identifier. */ | |
1368 | ||
1369 | static int | |
1370 | lex_identifier (void) | |
1371 | { | |
1372 | const char *start = lexptr; | |
1373 | unsigned int length; | |
1374 | const struct token_info *token; | |
1375 | int i; | |
1376 | int is_gdb_var = lexptr[0] == '$'; | |
1377 | ||
1378 | gdb_assert (rust_identifier_start_p (lexptr[0])); | |
1379 | ||
1380 | ++lexptr; | |
1381 | ||
1382 | /* For the time being this doesn't handle Unicode rules. Non-ASCII | |
1383 | identifiers are gated anyway. */ | |
1384 | while ((lexptr[0] >= 'a' && lexptr[0] <= 'z') | |
1385 | || (lexptr[0] >= 'A' && lexptr[0] <= 'Z') | |
1386 | || lexptr[0] == '_' | |
1387 | || (is_gdb_var && lexptr[0] == '$') | |
1388 | || (lexptr[0] >= '0' && lexptr[0] <= '9')) | |
1389 | ++lexptr; | |
1390 | ||
1391 | ||
1392 | length = lexptr - start; | |
1393 | token = NULL; | |
1394 | for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i) | |
1395 | { | |
1396 | if (length == strlen (identifier_tokens[i].name) | |
1397 | && strncmp (identifier_tokens[i].name, start, length) == 0) | |
1398 | { | |
1399 | token = &identifier_tokens[i]; | |
1400 | break; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | if (token != NULL) | |
1405 | { | |
1406 | if (token->value == 0) | |
1407 | { | |
1408 | /* Leave the terminating token alone. */ | |
1409 | lexptr = start; | |
1410 | return 0; | |
1411 | } | |
1412 | } | |
1413 | else if (token == NULL | |
1414 | && (strncmp (start, "thread", length) == 0 | |
1415 | || strncmp (start, "task", length) == 0) | |
1416 | && space_then_number (lexptr)) | |
1417 | { | |
1418 | /* "task" or "thread" followed by a number terminates the | |
1419 | parse, per gdb rules. */ | |
1420 | lexptr = start; | |
1421 | return 0; | |
1422 | } | |
1423 | ||
1424 | if (token == NULL || (parse_completion && lexptr[0] == '\0')) | |
1425 | rustyylval.sval = make_stoken (rust_copy_name (start, length)); | |
1426 | ||
1427 | if (parse_completion && lexptr[0] == '\0') | |
1428 | { | |
1429 | /* Prevent rustyylex from returning two COMPLETE tokens. */ | |
1430 | prev_lexptr = lexptr; | |
1431 | return COMPLETE; | |
1432 | } | |
1433 | ||
1434 | if (token != NULL) | |
1435 | return token->value; | |
1436 | if (is_gdb_var) | |
1437 | return GDBVAR; | |
1438 | return IDENT; | |
1439 | } | |
1440 | ||
1441 | /* Lex an operator. */ | |
1442 | ||
1443 | static int | |
1444 | lex_operator (void) | |
1445 | { | |
1446 | const struct token_info *token = NULL; | |
1447 | int i; | |
1448 | ||
1449 | for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i) | |
1450 | { | |
1451 | if (strncmp (operator_tokens[i].name, lexptr, | |
1452 | strlen (operator_tokens[i].name)) == 0) | |
1453 | { | |
1454 | lexptr += strlen (operator_tokens[i].name); | |
1455 | token = &operator_tokens[i]; | |
1456 | break; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | if (token != NULL) | |
1461 | { | |
1462 | rustyylval.opcode = token->opcode; | |
1463 | return token->value; | |
1464 | } | |
1465 | ||
1466 | return *lexptr++; | |
1467 | } | |
1468 | ||
1469 | /* Lex a number. */ | |
1470 | ||
1471 | static int | |
1472 | lex_number (void) | |
1473 | { | |
1474 | regmatch_t subexps[NUM_SUBEXPRESSIONS]; | |
1475 | int match; | |
1476 | int is_integer = 0; | |
1477 | int could_be_decimal = 1; | |
347dc102 | 1478 | int implicit_i32 = 0; |
8001f118 | 1479 | const char *type_name = NULL; |
c44af4eb TT |
1480 | struct type *type; |
1481 | int end_index; | |
1482 | int type_index = -1; | |
8001f118 | 1483 | int i; |
c44af4eb TT |
1484 | |
1485 | match = regexec (&number_regex, lexptr, ARRAY_SIZE (subexps), subexps, 0); | |
1486 | /* Failure means the regexp is broken. */ | |
1487 | gdb_assert (match == 0); | |
1488 | ||
1489 | if (subexps[INT_TEXT].rm_so != -1) | |
1490 | { | |
1491 | /* Integer part matched. */ | |
1492 | is_integer = 1; | |
1493 | end_index = subexps[INT_TEXT].rm_eo; | |
1494 | if (subexps[INT_TYPE].rm_so == -1) | |
347dc102 TT |
1495 | { |
1496 | type_name = "i32"; | |
1497 | implicit_i32 = 1; | |
1498 | } | |
c44af4eb TT |
1499 | else |
1500 | { | |
1501 | type_index = INT_TYPE; | |
1502 | could_be_decimal = 0; | |
1503 | } | |
1504 | } | |
1505 | else if (subexps[FLOAT_TYPE1].rm_so != -1) | |
1506 | { | |
1507 | /* Found floating point type suffix. */ | |
1508 | end_index = subexps[FLOAT_TYPE1].rm_so; | |
1509 | type_index = FLOAT_TYPE1; | |
1510 | } | |
1511 | else if (subexps[FLOAT_TYPE2].rm_so != -1) | |
1512 | { | |
1513 | /* Found floating point type suffix. */ | |
1514 | end_index = subexps[FLOAT_TYPE2].rm_so; | |
1515 | type_index = FLOAT_TYPE2; | |
1516 | } | |
1517 | else | |
1518 | { | |
1519 | /* Any other floating point match. */ | |
1520 | end_index = subexps[0].rm_eo; | |
1521 | type_name = "f64"; | |
1522 | } | |
1523 | ||
1524 | /* We need a special case if the final character is ".". In this | |
1525 | case we might need to parse an integer. For example, "23.f()" is | |
1526 | a request for a trait method call, not a syntax error involving | |
1527 | the floating point number "23.". */ | |
1528 | gdb_assert (subexps[0].rm_eo > 0); | |
1529 | if (lexptr[subexps[0].rm_eo - 1] == '.') | |
1530 | { | |
f1735a53 | 1531 | const char *next = skip_spaces (&lexptr[subexps[0].rm_eo]); |
c44af4eb TT |
1532 | |
1533 | if (rust_identifier_start_p (*next) || *next == '.') | |
1534 | { | |
1535 | --subexps[0].rm_eo; | |
1536 | is_integer = 1; | |
1537 | end_index = subexps[0].rm_eo; | |
1538 | type_name = "i32"; | |
1539 | could_be_decimal = 1; | |
347dc102 | 1540 | implicit_i32 = 1; |
c44af4eb TT |
1541 | } |
1542 | } | |
1543 | ||
1544 | /* Compute the type name if we haven't already. */ | |
8001f118 | 1545 | std::string type_name_holder; |
c44af4eb TT |
1546 | if (type_name == NULL) |
1547 | { | |
1548 | gdb_assert (type_index != -1); | |
8001f118 TT |
1549 | type_name_holder = std::string (lexptr + subexps[type_index].rm_so, |
1550 | (subexps[type_index].rm_eo | |
1551 | - subexps[type_index].rm_so)); | |
1552 | type_name = type_name_holder.c_str (); | |
c44af4eb TT |
1553 | } |
1554 | ||
1555 | /* Look up the type. */ | |
1556 | type = rust_type (type_name); | |
1557 | ||
1558 | /* Copy the text of the number and remove the "_"s. */ | |
8001f118 TT |
1559 | std::string number; |
1560 | for (i = 0; i < end_index && lexptr[i]; ++i) | |
c44af4eb | 1561 | { |
8001f118 | 1562 | if (lexptr[i] == '_') |
c44af4eb TT |
1563 | could_be_decimal = 0; |
1564 | else | |
8001f118 | 1565 | number.push_back (lexptr[i]); |
c44af4eb | 1566 | } |
c44af4eb TT |
1567 | |
1568 | /* Advance past the match. */ | |
1569 | lexptr += subexps[0].rm_eo; | |
1570 | ||
1571 | /* Parse the number. */ | |
1572 | if (is_integer) | |
1573 | { | |
347dc102 | 1574 | uint64_t value; |
c44af4eb | 1575 | int radix = 10; |
8001f118 TT |
1576 | int offset = 0; |
1577 | ||
c44af4eb TT |
1578 | if (number[0] == '0') |
1579 | { | |
1580 | if (number[1] == 'x') | |
1581 | radix = 16; | |
1582 | else if (number[1] == 'o') | |
1583 | radix = 8; | |
1584 | else if (number[1] == 'b') | |
1585 | radix = 2; | |
1586 | if (radix != 10) | |
1587 | { | |
8001f118 | 1588 | offset = 2; |
c44af4eb TT |
1589 | could_be_decimal = 0; |
1590 | } | |
1591 | } | |
347dc102 | 1592 | |
8001f118 | 1593 | value = strtoul (number.c_str () + offset, NULL, radix); |
347dc102 TT |
1594 | if (implicit_i32 && value >= ((uint64_t) 1) << 31) |
1595 | type = rust_type ("i64"); | |
1596 | ||
1597 | rustyylval.typed_val_int.val = value; | |
c44af4eb TT |
1598 | rustyylval.typed_val_int.type = type; |
1599 | } | |
1600 | else | |
1601 | { | |
c44af4eb | 1602 | rustyylval.typed_val_float.type = type; |
edd079d9 UW |
1603 | bool parsed = parse_float (number.c_str (), number.length (), |
1604 | rustyylval.typed_val_float.type, | |
1605 | rustyylval.typed_val_float.val); | |
1606 | gdb_assert (parsed); | |
c44af4eb TT |
1607 | } |
1608 | ||
c44af4eb TT |
1609 | return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT; |
1610 | } | |
1611 | ||
1612 | /* The lexer. */ | |
1613 | ||
1614 | static int | |
1615 | rustyylex (void) | |
1616 | { | |
1617 | /* Skip all leading whitespace. */ | |
1618 | while (lexptr[0] == ' ' || lexptr[0] == '\t' || lexptr[0] == '\r' | |
1619 | || lexptr[0] == '\n') | |
1620 | ++lexptr; | |
1621 | ||
1622 | /* If we hit EOF and we're completing, then return COMPLETE -- maybe | |
1623 | we're completing an empty string at the end of a field_expr. | |
1624 | But, we don't want to return two COMPLETE tokens in a row. */ | |
1625 | if (lexptr[0] == '\0' && lexptr == prev_lexptr) | |
1626 | return 0; | |
1627 | prev_lexptr = lexptr; | |
1628 | if (lexptr[0] == '\0') | |
1629 | { | |
1630 | if (parse_completion) | |
1631 | { | |
1632 | rustyylval.sval = make_stoken (""); | |
1633 | return COMPLETE; | |
1634 | } | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | if (lexptr[0] >= '0' && lexptr[0] <= '9') | |
1639 | return lex_number (); | |
1640 | else if (lexptr[0] == 'b' && lexptr[1] == '\'') | |
1641 | return lex_character (); | |
1642 | else if (lexptr[0] == 'b' && lexptr[1] == '"') | |
1643 | return lex_string (); | |
1644 | else if (lexptr[0] == 'b' && starts_raw_string (lexptr + 1)) | |
1645 | return lex_string (); | |
1646 | else if (starts_raw_string (lexptr)) | |
1647 | return lex_string (); | |
1648 | else if (rust_identifier_start_p (lexptr[0])) | |
1649 | return lex_identifier (); | |
1650 | else if (lexptr[0] == '"') | |
1651 | return lex_string (); | |
1652 | else if (lexptr[0] == '\'') | |
1653 | return lex_character (); | |
1654 | else if (lexptr[0] == '}' || lexptr[0] == ']') | |
1655 | { | |
1656 | /* Falls through to lex_operator. */ | |
1657 | --paren_depth; | |
1658 | } | |
1659 | else if (lexptr[0] == '(' || lexptr[0] == '{') | |
1660 | { | |
1661 | /* Falls through to lex_operator. */ | |
1662 | ++paren_depth; | |
1663 | } | |
1664 | else if (lexptr[0] == ',' && comma_terminates && paren_depth == 0) | |
1665 | return 0; | |
1666 | ||
1667 | return lex_operator (); | |
1668 | } | |
1669 | ||
1670 | /* Push back a single character to be re-lexed. */ | |
1671 | ||
1672 | static void | |
1673 | rust_push_back (char c) | |
1674 | { | |
1675 | /* Can't be called before any lexing. */ | |
1676 | gdb_assert (prev_lexptr != NULL); | |
1677 | ||
1678 | --lexptr; | |
1679 | gdb_assert (*lexptr == c); | |
1680 | } | |
1681 | ||
1682 | \f | |
1683 | ||
1684 | /* Make an arbitrary operation and fill in the fields. */ | |
1685 | ||
1686 | static const struct rust_op * | |
1687 | ast_operation (enum exp_opcode opcode, const struct rust_op *left, | |
1688 | const struct rust_op *right) | |
1689 | { | |
3232fabd | 1690 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1691 | |
1692 | result->opcode = opcode; | |
1693 | result->left.op = left; | |
1694 | result->right.op = right; | |
1695 | ||
1696 | return result; | |
1697 | } | |
1698 | ||
1699 | /* Make a compound assignment operation. */ | |
1700 | ||
1701 | static const struct rust_op * | |
1702 | ast_compound_assignment (enum exp_opcode opcode, const struct rust_op *left, | |
1703 | const struct rust_op *right) | |
1704 | { | |
3232fabd | 1705 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1706 | |
1707 | result->opcode = opcode; | |
1708 | result->compound_assignment = 1; | |
1709 | result->left.op = left; | |
1710 | result->right.op = right; | |
1711 | ||
1712 | return result; | |
1713 | } | |
1714 | ||
1715 | /* Make a typed integer literal operation. */ | |
1716 | ||
1717 | static const struct rust_op * | |
1718 | ast_literal (struct typed_val_int val) | |
1719 | { | |
3232fabd | 1720 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1721 | |
1722 | result->opcode = OP_LONG; | |
1723 | result->left.typed_val_int = val; | |
1724 | ||
1725 | return result; | |
1726 | } | |
1727 | ||
1728 | /* Make a typed floating point literal operation. */ | |
1729 | ||
1730 | static const struct rust_op * | |
1731 | ast_dliteral (struct typed_val_float val) | |
1732 | { | |
3232fabd | 1733 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb | 1734 | |
edd079d9 | 1735 | result->opcode = OP_FLOAT; |
c44af4eb TT |
1736 | result->left.typed_val_float = val; |
1737 | ||
1738 | return result; | |
1739 | } | |
1740 | ||
1741 | /* Make a unary operation. */ | |
1742 | ||
1743 | static const struct rust_op * | |
1744 | ast_unary (enum exp_opcode opcode, const struct rust_op *expr) | |
1745 | { | |
1746 | return ast_operation (opcode, expr, NULL); | |
1747 | } | |
1748 | ||
1749 | /* Make a cast operation. */ | |
1750 | ||
1751 | static const struct rust_op * | |
1752 | ast_cast (const struct rust_op *expr, const struct rust_op *type) | |
1753 | { | |
3232fabd | 1754 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1755 | |
1756 | result->opcode = UNOP_CAST; | |
1757 | result->left.op = expr; | |
1758 | result->right.op = type; | |
1759 | ||
1760 | return result; | |
1761 | } | |
1762 | ||
1763 | /* Make a call-like operation. This is nominally a function call, but | |
1764 | when lowering we may discover that it actually represents the | |
1765 | creation of a tuple struct. */ | |
1766 | ||
1767 | static const struct rust_op * | |
1768 | ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr, | |
3232fabd | 1769 | rust_op_vector *params) |
c44af4eb | 1770 | { |
3232fabd | 1771 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1772 | |
1773 | result->opcode = opcode; | |
1774 | result->left.op = expr; | |
1775 | result->right.params = params; | |
1776 | ||
1777 | return result; | |
1778 | } | |
1779 | ||
1780 | /* Make a structure creation operation. */ | |
1781 | ||
1782 | static const struct rust_op * | |
3232fabd | 1783 | ast_struct (const struct rust_op *name, rust_set_vector *fields) |
c44af4eb | 1784 | { |
3232fabd | 1785 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1786 | |
1787 | result->opcode = OP_AGGREGATE; | |
1788 | result->left.op = name; | |
1789 | result->right.field_inits = fields; | |
1790 | ||
1791 | return result; | |
1792 | } | |
1793 | ||
1794 | /* Make an identifier path. */ | |
1795 | ||
1796 | static const struct rust_op * | |
3232fabd | 1797 | ast_path (struct stoken path, rust_op_vector *params) |
c44af4eb | 1798 | { |
3232fabd | 1799 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1800 | |
1801 | result->opcode = OP_VAR_VALUE; | |
1802 | result->left.sval = path; | |
1803 | result->right.params = params; | |
1804 | ||
1805 | return result; | |
1806 | } | |
1807 | ||
1808 | /* Make a string constant operation. */ | |
1809 | ||
1810 | static const struct rust_op * | |
1811 | ast_string (struct stoken str) | |
1812 | { | |
3232fabd | 1813 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1814 | |
1815 | result->opcode = OP_STRING; | |
1816 | result->left.sval = str; | |
1817 | ||
1818 | return result; | |
1819 | } | |
1820 | ||
1821 | /* Make a field expression. */ | |
1822 | ||
1823 | static const struct rust_op * | |
1824 | ast_structop (const struct rust_op *left, const char *name, int completing) | |
1825 | { | |
3232fabd | 1826 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1827 | |
1828 | result->opcode = STRUCTOP_STRUCT; | |
1829 | result->completing = completing; | |
1830 | result->left.op = left; | |
1831 | result->right.sval = make_stoken (name); | |
1832 | ||
1833 | return result; | |
1834 | } | |
1835 | ||
1836 | /* Make an anonymous struct operation, like 'x.0'. */ | |
1837 | ||
1838 | static const struct rust_op * | |
1839 | ast_structop_anonymous (const struct rust_op *left, | |
1840 | struct typed_val_int number) | |
1841 | { | |
3232fabd | 1842 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1843 | |
1844 | result->opcode = STRUCTOP_ANONYMOUS; | |
1845 | result->left.op = left; | |
1846 | result->right.typed_val_int = number; | |
1847 | ||
1848 | return result; | |
1849 | } | |
1850 | ||
1851 | /* Make a range operation. */ | |
1852 | ||
1853 | static const struct rust_op * | |
6873858b TT |
1854 | ast_range (const struct rust_op *lhs, const struct rust_op *rhs, |
1855 | bool inclusive) | |
c44af4eb | 1856 | { |
3232fabd | 1857 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb | 1858 | |
01739a3b | 1859 | result->opcode = OP_RANGE; |
6873858b | 1860 | result->inclusive = inclusive; |
c44af4eb TT |
1861 | result->left.op = lhs; |
1862 | result->right.op = rhs; | |
1863 | ||
1864 | return result; | |
1865 | } | |
1866 | ||
1867 | /* A helper function to make a type-related AST node. */ | |
1868 | ||
1869 | static struct rust_op * | |
1870 | ast_basic_type (enum type_code typecode) | |
1871 | { | |
3232fabd | 1872 | struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op); |
c44af4eb TT |
1873 | |
1874 | result->opcode = OP_TYPE; | |
1875 | result->typecode = typecode; | |
1876 | return result; | |
1877 | } | |
1878 | ||
1879 | /* Create an AST node describing an array type. */ | |
1880 | ||
1881 | static const struct rust_op * | |
1882 | ast_array_type (const struct rust_op *lhs, struct typed_val_int val) | |
1883 | { | |
1884 | struct rust_op *result = ast_basic_type (TYPE_CODE_ARRAY); | |
1885 | ||
1886 | result->left.op = lhs; | |
1887 | result->right.typed_val_int = val; | |
1888 | return result; | |
1889 | } | |
1890 | ||
1891 | /* Create an AST node describing a reference type. */ | |
1892 | ||
1893 | static const struct rust_op * | |
1894 | ast_slice_type (const struct rust_op *type) | |
1895 | { | |
1896 | /* Use TYPE_CODE_COMPLEX just because it is handy. */ | |
1897 | struct rust_op *result = ast_basic_type (TYPE_CODE_COMPLEX); | |
1898 | ||
1899 | result->left.op = type; | |
1900 | return result; | |
1901 | } | |
1902 | ||
1903 | /* Create an AST node describing a reference type. */ | |
1904 | ||
1905 | static const struct rust_op * | |
1906 | ast_reference_type (const struct rust_op *type) | |
1907 | { | |
1908 | struct rust_op *result = ast_basic_type (TYPE_CODE_REF); | |
1909 | ||
1910 | result->left.op = type; | |
1911 | return result; | |
1912 | } | |
1913 | ||
1914 | /* Create an AST node describing a pointer type. */ | |
1915 | ||
1916 | static const struct rust_op * | |
1917 | ast_pointer_type (const struct rust_op *type, int is_mut) | |
1918 | { | |
1919 | struct rust_op *result = ast_basic_type (TYPE_CODE_PTR); | |
1920 | ||
1921 | result->left.op = type; | |
1922 | /* For the time being we ignore is_mut. */ | |
1923 | return result; | |
1924 | } | |
1925 | ||
1926 | /* Create an AST node describing a function type. */ | |
1927 | ||
1928 | static const struct rust_op * | |
3232fabd | 1929 | ast_function_type (const struct rust_op *rtype, rust_op_vector *params) |
c44af4eb TT |
1930 | { |
1931 | struct rust_op *result = ast_basic_type (TYPE_CODE_FUNC); | |
1932 | ||
1933 | result->left.op = rtype; | |
1934 | result->right.params = params; | |
1935 | return result; | |
1936 | } | |
1937 | ||
1938 | /* Create an AST node describing a tuple type. */ | |
1939 | ||
1940 | static const struct rust_op * | |
3232fabd | 1941 | ast_tuple_type (rust_op_vector *params) |
c44af4eb TT |
1942 | { |
1943 | struct rust_op *result = ast_basic_type (TYPE_CODE_STRUCT); | |
1944 | ||
1945 | result->left.params = params; | |
1946 | return result; | |
1947 | } | |
1948 | ||
1949 | /* A helper to appropriately munge NAME and BLOCK depending on the | |
1950 | presence of a leading "::". */ | |
1951 | ||
1952 | static void | |
1953 | munge_name_and_block (const char **name, const struct block **block) | |
1954 | { | |
1955 | /* If it is a global reference, skip the current block in favor of | |
1956 | the static block. */ | |
1957 | if (strncmp (*name, "::", 2) == 0) | |
1958 | { | |
1959 | *name += 2; | |
1960 | *block = block_static_block (*block); | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | /* Like lookup_symbol, but handles Rust namespace conventions, and | |
1965 | doesn't require field_of_this_result. */ | |
1966 | ||
1967 | static struct block_symbol | |
1968 | rust_lookup_symbol (const char *name, const struct block *block, | |
1969 | const domain_enum domain) | |
1970 | { | |
1971 | struct block_symbol result; | |
1972 | ||
1973 | munge_name_and_block (&name, &block); | |
1974 | ||
1975 | result = lookup_symbol (name, block, domain, NULL); | |
1976 | if (result.symbol != NULL) | |
1977 | update_innermost_block (result); | |
1978 | return result; | |
1979 | } | |
1980 | ||
1981 | /* Look up a type, following Rust namespace conventions. */ | |
1982 | ||
1983 | static struct type * | |
1984 | rust_lookup_type (const char *name, const struct block *block) | |
1985 | { | |
1986 | struct block_symbol result; | |
1987 | struct type *type; | |
1988 | ||
1989 | munge_name_and_block (&name, &block); | |
1990 | ||
1991 | result = lookup_symbol (name, block, STRUCT_DOMAIN, NULL); | |
1992 | if (result.symbol != NULL) | |
1993 | { | |
1994 | update_innermost_block (result); | |
1995 | return SYMBOL_TYPE (result.symbol); | |
1996 | } | |
1997 | ||
3232fabd | 1998 | type = lookup_typename (current_parser->language (), current_parser->arch (), |
c44af4eb TT |
1999 | name, NULL, 1); |
2000 | if (type != NULL) | |
2001 | return type; | |
2002 | ||
2003 | /* Last chance, try a built-in type. */ | |
3232fabd TT |
2004 | return language_lookup_primitive_type (current_parser->language (), |
2005 | current_parser->arch (), | |
c44af4eb TT |
2006 | name); |
2007 | } | |
2008 | ||
2009 | static struct type *convert_ast_to_type (struct parser_state *state, | |
2010 | const struct rust_op *operation); | |
2011 | static const char *convert_name (struct parser_state *state, | |
2012 | const struct rust_op *operation); | |
2013 | ||
2014 | /* Convert a vector of rust_ops representing types to a vector of | |
2015 | types. */ | |
2016 | ||
8001f118 | 2017 | static std::vector<struct type *> |
3232fabd | 2018 | convert_params_to_types (struct parser_state *state, rust_op_vector *params) |
c44af4eb | 2019 | { |
8001f118 | 2020 | std::vector<struct type *> result; |
c44af4eb | 2021 | |
1632f8ba DR |
2022 | if (params != nullptr) |
2023 | { | |
2024 | for (const rust_op *op : *params) | |
2025 | result.push_back (convert_ast_to_type (state, op)); | |
2026 | } | |
c44af4eb | 2027 | |
c44af4eb TT |
2028 | return result; |
2029 | } | |
2030 | ||
2031 | /* Convert a rust_op representing a type to a struct type *. */ | |
2032 | ||
2033 | static struct type * | |
2034 | convert_ast_to_type (struct parser_state *state, | |
2035 | const struct rust_op *operation) | |
2036 | { | |
2037 | struct type *type, *result = NULL; | |
2038 | ||
2039 | if (operation->opcode == OP_VAR_VALUE) | |
2040 | { | |
2041 | const char *varname = convert_name (state, operation); | |
2042 | ||
2043 | result = rust_lookup_type (varname, expression_context_block); | |
2044 | if (result == NULL) | |
2045 | error (_("No typed name '%s' in current context"), varname); | |
2046 | return result; | |
2047 | } | |
2048 | ||
2049 | gdb_assert (operation->opcode == OP_TYPE); | |
2050 | ||
2051 | switch (operation->typecode) | |
2052 | { | |
2053 | case TYPE_CODE_ARRAY: | |
2054 | type = convert_ast_to_type (state, operation->left.op); | |
2055 | if (operation->right.typed_val_int.val < 0) | |
2056 | error (_("Negative array length")); | |
2057 | result = lookup_array_range_type (type, 0, | |
2058 | operation->right.typed_val_int.val - 1); | |
2059 | break; | |
2060 | ||
2061 | case TYPE_CODE_COMPLEX: | |
2062 | { | |
2063 | struct type *usize = rust_type ("usize"); | |
2064 | ||
2065 | type = convert_ast_to_type (state, operation->left.op); | |
2066 | result = rust_slice_type ("&[*gdb*]", type, usize); | |
2067 | } | |
2068 | break; | |
2069 | ||
2070 | case TYPE_CODE_REF: | |
2071 | case TYPE_CODE_PTR: | |
2072 | /* For now we treat &x and *x identically. */ | |
2073 | type = convert_ast_to_type (state, operation->left.op); | |
2074 | result = lookup_pointer_type (type); | |
2075 | break; | |
2076 | ||
2077 | case TYPE_CODE_FUNC: | |
2078 | { | |
8001f118 | 2079 | std::vector<struct type *> args |
3232fabd | 2080 | (convert_params_to_types (state, operation->right.params)); |
c44af4eb TT |
2081 | struct type **argtypes = NULL; |
2082 | ||
2083 | type = convert_ast_to_type (state, operation->left.op); | |
8001f118 TT |
2084 | if (!args.empty ()) |
2085 | argtypes = args.data (); | |
c44af4eb TT |
2086 | |
2087 | result | |
8001f118 | 2088 | = lookup_function_type_with_arguments (type, args.size (), |
c44af4eb TT |
2089 | argtypes); |
2090 | result = lookup_pointer_type (result); | |
c44af4eb TT |
2091 | } |
2092 | break; | |
2093 | ||
2094 | case TYPE_CODE_STRUCT: | |
2095 | { | |
8001f118 | 2096 | std::vector<struct type *> args |
3232fabd | 2097 | (convert_params_to_types (state, operation->left.params)); |
c44af4eb | 2098 | int i; |
c44af4eb TT |
2099 | const char *name; |
2100 | ||
3232fabd | 2101 | obstack_1grow (work_obstack, '('); |
8001f118 | 2102 | for (i = 0; i < args.size (); ++i) |
c44af4eb | 2103 | { |
8001f118 | 2104 | std::string type_name = type_to_string (args[i]); |
c44af4eb TT |
2105 | |
2106 | if (i > 0) | |
3232fabd TT |
2107 | obstack_1grow (work_obstack, ','); |
2108 | obstack_grow_str (work_obstack, type_name.c_str ()); | |
c44af4eb TT |
2109 | } |
2110 | ||
3232fabd TT |
2111 | obstack_grow_str0 (work_obstack, ")"); |
2112 | name = (const char *) obstack_finish (work_obstack); | |
c44af4eb TT |
2113 | |
2114 | /* We don't allow creating new tuple types (yet), but we do | |
2115 | allow looking up existing tuple types. */ | |
2116 | result = rust_lookup_type (name, expression_context_block); | |
2117 | if (result == NULL) | |
2118 | error (_("could not find tuple type '%s'"), name); | |
c44af4eb TT |
2119 | } |
2120 | break; | |
2121 | ||
2122 | default: | |
2123 | gdb_assert_not_reached ("unhandled opcode in convert_ast_to_type"); | |
2124 | } | |
2125 | ||
2126 | gdb_assert (result != NULL); | |
2127 | return result; | |
2128 | } | |
2129 | ||
2130 | /* A helper function to turn a rust_op representing a name into a full | |
2131 | name. This applies generic arguments as needed. The returned name | |
2132 | is allocated on the work obstack. */ | |
2133 | ||
2134 | static const char * | |
2135 | convert_name (struct parser_state *state, const struct rust_op *operation) | |
2136 | { | |
c44af4eb | 2137 | int i; |
c44af4eb TT |
2138 | |
2139 | gdb_assert (operation->opcode == OP_VAR_VALUE); | |
2140 | ||
2141 | if (operation->right.params == NULL) | |
2142 | return operation->left.sval.ptr; | |
2143 | ||
8001f118 | 2144 | std::vector<struct type *> types |
3232fabd | 2145 | (convert_params_to_types (state, operation->right.params)); |
c44af4eb | 2146 | |
3232fabd TT |
2147 | obstack_grow_str (work_obstack, operation->left.sval.ptr); |
2148 | obstack_1grow (work_obstack, '<'); | |
8001f118 | 2149 | for (i = 0; i < types.size (); ++i) |
c44af4eb | 2150 | { |
8001f118 | 2151 | std::string type_name = type_to_string (types[i]); |
c44af4eb TT |
2152 | |
2153 | if (i > 0) | |
3232fabd | 2154 | obstack_1grow (work_obstack, ','); |
c44af4eb | 2155 | |
3232fabd | 2156 | obstack_grow_str (work_obstack, type_name.c_str ()); |
c44af4eb | 2157 | } |
3232fabd | 2158 | obstack_grow_str0 (work_obstack, ">"); |
c44af4eb | 2159 | |
3232fabd | 2160 | return (const char *) obstack_finish (work_obstack); |
c44af4eb TT |
2161 | } |
2162 | ||
2163 | static void convert_ast_to_expression (struct parser_state *state, | |
2164 | const struct rust_op *operation, | |
8880f2a9 TT |
2165 | const struct rust_op *top, |
2166 | bool want_type = false); | |
c44af4eb TT |
2167 | |
2168 | /* A helper function that converts a vec of rust_ops to a gdb | |
2169 | expression. */ | |
2170 | ||
2171 | static void | |
2172 | convert_params_to_expression (struct parser_state *state, | |
3232fabd | 2173 | rust_op_vector *params, |
c44af4eb TT |
2174 | const struct rust_op *top) |
2175 | { | |
3232fabd | 2176 | for (const rust_op *elem : *params) |
c44af4eb TT |
2177 | convert_ast_to_expression (state, elem, top); |
2178 | } | |
2179 | ||
2180 | /* Lower a rust_op to a gdb expression. STATE is the parser state. | |
2181 | OPERATION is the operation to lower. TOP is a pointer to the | |
2182 | top-most operation; it is used to handle the special case where the | |
2183 | top-most expression is an identifier and can be optionally lowered | |
8880f2a9 TT |
2184 | to OP_TYPE. WANT_TYPE is a flag indicating that, if the expression |
2185 | is the name of a type, then emit an OP_TYPE for it (rather than | |
2186 | erroring). If WANT_TYPE is set, then the similar TOP handling is | |
2187 | not done. */ | |
c44af4eb TT |
2188 | |
2189 | static void | |
2190 | convert_ast_to_expression (struct parser_state *state, | |
2191 | const struct rust_op *operation, | |
8880f2a9 TT |
2192 | const struct rust_op *top, |
2193 | bool want_type) | |
c44af4eb TT |
2194 | { |
2195 | switch (operation->opcode) | |
2196 | { | |
2197 | case OP_LONG: | |
2198 | write_exp_elt_opcode (state, OP_LONG); | |
2199 | write_exp_elt_type (state, operation->left.typed_val_int.type); | |
2200 | write_exp_elt_longcst (state, operation->left.typed_val_int.val); | |
2201 | write_exp_elt_opcode (state, OP_LONG); | |
2202 | break; | |
2203 | ||
edd079d9 UW |
2204 | case OP_FLOAT: |
2205 | write_exp_elt_opcode (state, OP_FLOAT); | |
c44af4eb | 2206 | write_exp_elt_type (state, operation->left.typed_val_float.type); |
edd079d9 UW |
2207 | write_exp_elt_floatcst (state, operation->left.typed_val_float.val); |
2208 | write_exp_elt_opcode (state, OP_FLOAT); | |
c44af4eb TT |
2209 | break; |
2210 | ||
2211 | case STRUCTOP_STRUCT: | |
2212 | { | |
2213 | convert_ast_to_expression (state, operation->left.op, top); | |
2214 | ||
2215 | if (operation->completing) | |
2216 | mark_struct_expression (state); | |
2217 | write_exp_elt_opcode (state, STRUCTOP_STRUCT); | |
2218 | write_exp_string (state, operation->right.sval); | |
2219 | write_exp_elt_opcode (state, STRUCTOP_STRUCT); | |
2220 | } | |
2221 | break; | |
2222 | ||
2223 | case STRUCTOP_ANONYMOUS: | |
2224 | { | |
2225 | convert_ast_to_expression (state, operation->left.op, top); | |
2226 | ||
2227 | write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS); | |
2228 | write_exp_elt_longcst (state, operation->right.typed_val_int.val); | |
2229 | write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS); | |
2230 | } | |
2231 | break; | |
2232 | ||
8880f2a9 TT |
2233 | case UNOP_SIZEOF: |
2234 | convert_ast_to_expression (state, operation->left.op, top, true); | |
2235 | write_exp_elt_opcode (state, UNOP_SIZEOF); | |
2236 | break; | |
2237 | ||
c44af4eb TT |
2238 | case UNOP_PLUS: |
2239 | case UNOP_NEG: | |
2240 | case UNOP_COMPLEMENT: | |
2241 | case UNOP_IND: | |
2242 | case UNOP_ADDR: | |
2243 | convert_ast_to_expression (state, operation->left.op, top); | |
2244 | write_exp_elt_opcode (state, operation->opcode); | |
2245 | break; | |
2246 | ||
2247 | case BINOP_SUBSCRIPT: | |
2248 | case BINOP_MUL: | |
2249 | case BINOP_REPEAT: | |
2250 | case BINOP_DIV: | |
2251 | case BINOP_REM: | |
2252 | case BINOP_LESS: | |
2253 | case BINOP_GTR: | |
2254 | case BINOP_BITWISE_AND: | |
2255 | case BINOP_BITWISE_IOR: | |
2256 | case BINOP_BITWISE_XOR: | |
2257 | case BINOP_ADD: | |
2258 | case BINOP_SUB: | |
2259 | case BINOP_LOGICAL_OR: | |
2260 | case BINOP_LOGICAL_AND: | |
2261 | case BINOP_EQUAL: | |
2262 | case BINOP_NOTEQUAL: | |
2263 | case BINOP_LEQ: | |
2264 | case BINOP_GEQ: | |
2265 | case BINOP_LSH: | |
2266 | case BINOP_RSH: | |
2267 | case BINOP_ASSIGN: | |
2268 | case OP_RUST_ARRAY: | |
2269 | convert_ast_to_expression (state, operation->left.op, top); | |
2270 | convert_ast_to_expression (state, operation->right.op, top); | |
2271 | if (operation->compound_assignment) | |
2272 | { | |
2273 | write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY); | |
2274 | write_exp_elt_opcode (state, operation->opcode); | |
2275 | write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY); | |
2276 | } | |
2277 | else | |
2278 | write_exp_elt_opcode (state, operation->opcode); | |
2279 | ||
2280 | if (operation->compound_assignment | |
2281 | || operation->opcode == BINOP_ASSIGN) | |
2282 | { | |
2283 | struct type *type; | |
2284 | ||
2285 | type = language_lookup_primitive_type (parse_language (state), | |
2286 | parse_gdbarch (state), | |
2287 | "()"); | |
2288 | ||
2289 | write_exp_elt_opcode (state, OP_LONG); | |
2290 | write_exp_elt_type (state, type); | |
2291 | write_exp_elt_longcst (state, 0); | |
2292 | write_exp_elt_opcode (state, OP_LONG); | |
2293 | ||
2294 | write_exp_elt_opcode (state, BINOP_COMMA); | |
2295 | } | |
2296 | break; | |
2297 | ||
2298 | case UNOP_CAST: | |
2299 | { | |
2300 | struct type *type = convert_ast_to_type (state, operation->right.op); | |
2301 | ||
2302 | convert_ast_to_expression (state, operation->left.op, top); | |
2303 | write_exp_elt_opcode (state, UNOP_CAST); | |
2304 | write_exp_elt_type (state, type); | |
2305 | write_exp_elt_opcode (state, UNOP_CAST); | |
2306 | } | |
2307 | break; | |
2308 | ||
2309 | case OP_FUNCALL: | |
2310 | { | |
2311 | if (operation->left.op->opcode == OP_VAR_VALUE) | |
2312 | { | |
2313 | struct type *type; | |
2314 | const char *varname = convert_name (state, operation->left.op); | |
2315 | ||
2316 | type = rust_lookup_type (varname, expression_context_block); | |
2317 | if (type != NULL) | |
2318 | { | |
2319 | /* This is actually a tuple struct expression, not a | |
2320 | call expression. */ | |
3232fabd | 2321 | rust_op_vector *params = operation->right.params; |
c44af4eb TT |
2322 | |
2323 | if (TYPE_CODE (type) != TYPE_CODE_NAMESPACE) | |
2324 | { | |
2325 | if (!rust_tuple_struct_type_p (type)) | |
2326 | error (_("Type %s is not a tuple struct"), varname); | |
2327 | ||
3232fabd | 2328 | for (int i = 0; i < params->size (); ++i) |
c44af4eb TT |
2329 | { |
2330 | char *cell = get_print_cell (); | |
2331 | ||
2332 | xsnprintf (cell, PRINT_CELL_SIZE, "__%d", i); | |
2333 | write_exp_elt_opcode (state, OP_NAME); | |
2334 | write_exp_string (state, make_stoken (cell)); | |
2335 | write_exp_elt_opcode (state, OP_NAME); | |
2336 | ||
3232fabd | 2337 | convert_ast_to_expression (state, (*params)[i], top); |
c44af4eb TT |
2338 | } |
2339 | ||
2340 | write_exp_elt_opcode (state, OP_AGGREGATE); | |
2341 | write_exp_elt_type (state, type); | |
3232fabd | 2342 | write_exp_elt_longcst (state, 2 * params->size ()); |
c44af4eb TT |
2343 | write_exp_elt_opcode (state, OP_AGGREGATE); |
2344 | break; | |
2345 | } | |
2346 | } | |
2347 | } | |
2348 | convert_ast_to_expression (state, operation->left.op, top); | |
3232fabd | 2349 | convert_params_to_expression (state, operation->right.params, top); |
c44af4eb | 2350 | write_exp_elt_opcode (state, OP_FUNCALL); |
3232fabd | 2351 | write_exp_elt_longcst (state, operation->right.params->size ()); |
c44af4eb TT |
2352 | write_exp_elt_longcst (state, OP_FUNCALL); |
2353 | } | |
2354 | break; | |
2355 | ||
2356 | case OP_ARRAY: | |
2357 | gdb_assert (operation->left.op == NULL); | |
3232fabd | 2358 | convert_params_to_expression (state, operation->right.params, top); |
c44af4eb TT |
2359 | write_exp_elt_opcode (state, OP_ARRAY); |
2360 | write_exp_elt_longcst (state, 0); | |
3232fabd | 2361 | write_exp_elt_longcst (state, operation->right.params->size () - 1); |
c44af4eb TT |
2362 | write_exp_elt_longcst (state, OP_ARRAY); |
2363 | break; | |
2364 | ||
2365 | case OP_VAR_VALUE: | |
2366 | { | |
2367 | struct block_symbol sym; | |
2368 | const char *varname; | |
2369 | ||
2370 | if (operation->left.sval.ptr[0] == '$') | |
2371 | { | |
2372 | write_dollar_variable (state, operation->left.sval); | |
2373 | break; | |
2374 | } | |
2375 | ||
2376 | varname = convert_name (state, operation); | |
2377 | sym = rust_lookup_symbol (varname, expression_context_block, | |
2378 | VAR_DOMAIN); | |
65547233 | 2379 | if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF) |
c44af4eb TT |
2380 | { |
2381 | write_exp_elt_opcode (state, OP_VAR_VALUE); | |
2382 | write_exp_elt_block (state, sym.block); | |
2383 | write_exp_elt_sym (state, sym.symbol); | |
2384 | write_exp_elt_opcode (state, OP_VAR_VALUE); | |
2385 | } | |
2386 | else | |
2387 | { | |
65547233 | 2388 | struct type *type = NULL; |
c44af4eb | 2389 | |
65547233 TT |
2390 | if (sym.symbol != NULL) |
2391 | { | |
2392 | gdb_assert (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF); | |
2393 | type = SYMBOL_TYPE (sym.symbol); | |
2394 | } | |
2395 | if (type == NULL) | |
2396 | type = rust_lookup_type (varname, expression_context_block); | |
c44af4eb TT |
2397 | if (type == NULL) |
2398 | error (_("No symbol '%s' in current context"), varname); | |
2399 | ||
8880f2a9 TT |
2400 | if (!want_type |
2401 | && TYPE_CODE (type) == TYPE_CODE_STRUCT | |
c44af4eb TT |
2402 | && TYPE_NFIELDS (type) == 0) |
2403 | { | |
2404 | /* A unit-like struct. */ | |
2405 | write_exp_elt_opcode (state, OP_AGGREGATE); | |
2406 | write_exp_elt_type (state, type); | |
2407 | write_exp_elt_longcst (state, 0); | |
2408 | write_exp_elt_opcode (state, OP_AGGREGATE); | |
2409 | } | |
8880f2a9 | 2410 | else if (want_type || operation == top) |
c44af4eb TT |
2411 | { |
2412 | write_exp_elt_opcode (state, OP_TYPE); | |
2413 | write_exp_elt_type (state, type); | |
2414 | write_exp_elt_opcode (state, OP_TYPE); | |
c44af4eb | 2415 | } |
8880f2a9 TT |
2416 | else |
2417 | error (_("Found type '%s', which can't be " | |
2418 | "evaluated in this context"), | |
2419 | varname); | |
c44af4eb TT |
2420 | } |
2421 | } | |
2422 | break; | |
2423 | ||
2424 | case OP_AGGREGATE: | |
2425 | { | |
c44af4eb | 2426 | int length; |
3232fabd | 2427 | rust_set_vector *fields = operation->right.field_inits; |
c44af4eb TT |
2428 | struct type *type; |
2429 | const char *name; | |
2430 | ||
2431 | length = 0; | |
3232fabd | 2432 | for (const set_field &init : *fields) |
c44af4eb | 2433 | { |
3232fabd | 2434 | if (init.name.ptr != NULL) |
c44af4eb TT |
2435 | { |
2436 | write_exp_elt_opcode (state, OP_NAME); | |
3232fabd | 2437 | write_exp_string (state, init.name); |
c44af4eb TT |
2438 | write_exp_elt_opcode (state, OP_NAME); |
2439 | ++length; | |
2440 | } | |
2441 | ||
3232fabd | 2442 | convert_ast_to_expression (state, init.init, top); |
c44af4eb TT |
2443 | ++length; |
2444 | ||
3232fabd | 2445 | if (init.name.ptr == NULL) |
c44af4eb TT |
2446 | { |
2447 | /* This is handled differently from Ada in our | |
2448 | evaluator. */ | |
2449 | write_exp_elt_opcode (state, OP_OTHERS); | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | name = convert_name (state, operation->left.op); | |
2454 | type = rust_lookup_type (name, expression_context_block); | |
2455 | if (type == NULL) | |
2456 | error (_("Could not find type '%s'"), operation->left.sval.ptr); | |
2457 | ||
2458 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT | |
2459 | || rust_tuple_type_p (type) | |
2460 | || rust_tuple_struct_type_p (type)) | |
2461 | error (_("Struct expression applied to non-struct type")); | |
2462 | ||
2463 | write_exp_elt_opcode (state, OP_AGGREGATE); | |
2464 | write_exp_elt_type (state, type); | |
2465 | write_exp_elt_longcst (state, length); | |
2466 | write_exp_elt_opcode (state, OP_AGGREGATE); | |
2467 | } | |
2468 | break; | |
2469 | ||
2470 | case OP_STRING: | |
2471 | { | |
2472 | write_exp_elt_opcode (state, OP_STRING); | |
2473 | write_exp_string (state, operation->left.sval); | |
2474 | write_exp_elt_opcode (state, OP_STRING); | |
2475 | } | |
2476 | break; | |
2477 | ||
01739a3b | 2478 | case OP_RANGE: |
c44af4eb | 2479 | { |
01739a3b | 2480 | enum range_type kind = BOTH_BOUND_DEFAULT; |
c44af4eb TT |
2481 | |
2482 | if (operation->left.op != NULL) | |
2483 | { | |
2484 | convert_ast_to_expression (state, operation->left.op, top); | |
2485 | kind = HIGH_BOUND_DEFAULT; | |
2486 | } | |
2487 | if (operation->right.op != NULL) | |
2488 | { | |
2489 | convert_ast_to_expression (state, operation->right.op, top); | |
2490 | if (kind == BOTH_BOUND_DEFAULT) | |
6873858b TT |
2491 | kind = (operation->inclusive |
2492 | ? LOW_BOUND_DEFAULT : LOW_BOUND_DEFAULT_EXCLUSIVE); | |
c44af4eb TT |
2493 | else |
2494 | { | |
2495 | gdb_assert (kind == HIGH_BOUND_DEFAULT); | |
6873858b TT |
2496 | kind = (operation->inclusive |
2497 | ? NONE_BOUND_DEFAULT : NONE_BOUND_DEFAULT_EXCLUSIVE); | |
c44af4eb TT |
2498 | } |
2499 | } | |
6873858b TT |
2500 | else |
2501 | { | |
2502 | /* Nothing should make an inclusive range without an upper | |
2503 | bound. */ | |
2504 | gdb_assert (!operation->inclusive); | |
2505 | } | |
2506 | ||
01739a3b | 2507 | write_exp_elt_opcode (state, OP_RANGE); |
c44af4eb | 2508 | write_exp_elt_longcst (state, kind); |
01739a3b | 2509 | write_exp_elt_opcode (state, OP_RANGE); |
c44af4eb TT |
2510 | } |
2511 | break; | |
2512 | ||
2513 | default: | |
2514 | gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression"); | |
2515 | } | |
2516 | } | |
2517 | ||
2518 | \f | |
2519 | ||
2520 | /* The parser as exposed to gdb. */ | |
2521 | ||
2522 | int | |
2523 | rust_parse (struct parser_state *state) | |
2524 | { | |
2525 | int result; | |
c44af4eb | 2526 | |
3232fabd TT |
2527 | /* This sets various globals and also clears them on |
2528 | destruction. */ | |
2529 | rust_parser parser (state); | |
8268c778 | 2530 | |
c44af4eb TT |
2531 | result = rustyyparse (); |
2532 | ||
3232fabd TT |
2533 | if (!result || (parse_completion && parser.rust_ast != NULL)) |
2534 | convert_ast_to_expression (state, parser.rust_ast, parser.rust_ast); | |
c44af4eb | 2535 | |
c44af4eb TT |
2536 | return result; |
2537 | } | |
2538 | ||
2539 | /* The parser error handler. */ | |
2540 | ||
2541 | void | |
a121b7c1 | 2542 | rustyyerror (const char *msg) |
c44af4eb TT |
2543 | { |
2544 | const char *where = prev_lexptr ? prev_lexptr : lexptr; | |
2545 | error (_("%s in expression, near `%s'."), (msg ? msg : "Error"), where); | |
2546 | } | |
2547 | ||
2548 | \f | |
2549 | ||
2550 | #if GDB_SELF_TEST | |
2551 | ||
2552 | /* Initialize the lexer for testing. */ | |
2553 | ||
2554 | static void | |
2555 | rust_lex_test_init (const char *input) | |
2556 | { | |
2557 | prev_lexptr = NULL; | |
2558 | lexptr = input; | |
2559 | paren_depth = 0; | |
2560 | } | |
2561 | ||
2562 | /* A test helper that lexes a string, expecting a single token. It | |
2563 | returns the lexer data for this token. */ | |
2564 | ||
2565 | static RUSTSTYPE | |
2566 | rust_lex_test_one (const char *input, int expected) | |
2567 | { | |
2568 | int token; | |
2569 | RUSTSTYPE result; | |
2570 | ||
2571 | rust_lex_test_init (input); | |
2572 | ||
2573 | token = rustyylex (); | |
2574 | SELF_CHECK (token == expected); | |
2575 | result = rustyylval; | |
2576 | ||
2577 | if (token) | |
2578 | { | |
2579 | token = rustyylex (); | |
2580 | SELF_CHECK (token == 0); | |
2581 | } | |
2582 | ||
2583 | return result; | |
2584 | } | |
2585 | ||
2586 | /* Test that INPUT lexes as the integer VALUE. */ | |
2587 | ||
2588 | static void | |
2589 | rust_lex_int_test (const char *input, int value, int kind) | |
2590 | { | |
2591 | RUSTSTYPE result = rust_lex_test_one (input, kind); | |
2592 | SELF_CHECK (result.typed_val_int.val == value); | |
2593 | } | |
2594 | ||
2595 | /* Test that INPUT throws an exception with text ERR. */ | |
2596 | ||
2597 | static void | |
2598 | rust_lex_exception_test (const char *input, const char *err) | |
2599 | { | |
2600 | TRY | |
2601 | { | |
2602 | /* The "kind" doesn't matter. */ | |
2603 | rust_lex_test_one (input, DECIMAL_INTEGER); | |
2604 | SELF_CHECK (0); | |
2605 | } | |
2606 | CATCH (except, RETURN_MASK_ERROR) | |
2607 | { | |
2608 | SELF_CHECK (strcmp (except.message, err) == 0); | |
2609 | } | |
2610 | END_CATCH | |
2611 | } | |
2612 | ||
2613 | /* Test that INPUT lexes as the identifier, string, or byte-string | |
2614 | VALUE. KIND holds the expected token kind. */ | |
2615 | ||
2616 | static void | |
2617 | rust_lex_stringish_test (const char *input, const char *value, int kind) | |
2618 | { | |
2619 | RUSTSTYPE result = rust_lex_test_one (input, kind); | |
2620 | SELF_CHECK (result.sval.length == strlen (value)); | |
2621 | SELF_CHECK (strncmp (result.sval.ptr, value, result.sval.length) == 0); | |
2622 | } | |
2623 | ||
2624 | /* Helper to test that a string parses as a given token sequence. */ | |
2625 | ||
2626 | static void | |
2627 | rust_lex_test_sequence (const char *input, int len, const int expected[]) | |
2628 | { | |
2629 | int i; | |
2630 | ||
2631 | lexptr = input; | |
2632 | paren_depth = 0; | |
2633 | ||
2634 | for (i = 0; i < len; ++i) | |
2635 | { | |
2636 | int token = rustyylex (); | |
2637 | ||
2638 | SELF_CHECK (token == expected[i]); | |
2639 | } | |
2640 | } | |
2641 | ||
2642 | /* Tests for an integer-parsing corner case. */ | |
2643 | ||
2644 | static void | |
2645 | rust_lex_test_trailing_dot (void) | |
2646 | { | |
2647 | const int expected1[] = { DECIMAL_INTEGER, '.', IDENT, '(', ')', 0 }; | |
2648 | const int expected2[] = { INTEGER, '.', IDENT, '(', ')', 0 }; | |
2649 | const int expected3[] = { FLOAT, EQEQ, '(', ')', 0 }; | |
2650 | const int expected4[] = { DECIMAL_INTEGER, DOTDOT, DECIMAL_INTEGER, 0 }; | |
2651 | ||
2652 | rust_lex_test_sequence ("23.g()", ARRAY_SIZE (expected1), expected1); | |
2653 | rust_lex_test_sequence ("23_0.g()", ARRAY_SIZE (expected2), expected2); | |
2654 | rust_lex_test_sequence ("23.==()", ARRAY_SIZE (expected3), expected3); | |
2655 | rust_lex_test_sequence ("23..25", ARRAY_SIZE (expected4), expected4); | |
2656 | } | |
2657 | ||
2658 | /* Tests of completion. */ | |
2659 | ||
2660 | static void | |
2661 | rust_lex_test_completion (void) | |
2662 | { | |
2663 | const int expected[] = { IDENT, '.', COMPLETE, 0 }; | |
2664 | ||
2665 | parse_completion = 1; | |
2666 | ||
2667 | rust_lex_test_sequence ("something.wha", ARRAY_SIZE (expected), expected); | |
2668 | rust_lex_test_sequence ("something.", ARRAY_SIZE (expected), expected); | |
2669 | ||
2670 | parse_completion = 0; | |
2671 | } | |
2672 | ||
2673 | /* Test pushback. */ | |
2674 | ||
2675 | static void | |
2676 | rust_lex_test_push_back (void) | |
2677 | { | |
2678 | int token; | |
2679 | ||
2680 | rust_lex_test_init (">>="); | |
2681 | ||
2682 | token = rustyylex (); | |
2683 | SELF_CHECK (token == COMPOUND_ASSIGN); | |
2684 | SELF_CHECK (rustyylval.opcode == BINOP_RSH); | |
2685 | ||
2686 | rust_push_back ('='); | |
2687 | ||
2688 | token = rustyylex (); | |
2689 | SELF_CHECK (token == '='); | |
2690 | ||
2691 | token = rustyylex (); | |
2692 | SELF_CHECK (token == 0); | |
2693 | } | |
2694 | ||
2695 | /* Unit test the lexer. */ | |
2696 | ||
2697 | static void | |
2698 | rust_lex_tests (void) | |
2699 | { | |
2700 | int i; | |
2701 | ||
3232fabd TT |
2702 | auto_obstack test_obstack; |
2703 | scoped_restore obstack_holder = make_scoped_restore (&work_obstack, | |
2704 | &test_obstack); | |
2705 | ||
edd079d9 | 2706 | // Set up dummy "parser", so that rust_type works. |
e9d9f57e | 2707 | struct parser_state ps (0, &rust_language_defn, target_gdbarch ()); |
edd079d9 | 2708 | rust_parser parser (&ps); |
c44af4eb TT |
2709 | |
2710 | rust_lex_test_one ("", 0); | |
2711 | rust_lex_test_one (" \t \n \r ", 0); | |
2712 | rust_lex_test_one ("thread 23", 0); | |
2713 | rust_lex_test_one ("task 23", 0); | |
2714 | rust_lex_test_one ("th 104", 0); | |
2715 | rust_lex_test_one ("ta 97", 0); | |
2716 | ||
2717 | rust_lex_int_test ("'z'", 'z', INTEGER); | |
2718 | rust_lex_int_test ("'\\xff'", 0xff, INTEGER); | |
2719 | rust_lex_int_test ("'\\u{1016f}'", 0x1016f, INTEGER); | |
2720 | rust_lex_int_test ("b'z'", 'z', INTEGER); | |
2721 | rust_lex_int_test ("b'\\xfe'", 0xfe, INTEGER); | |
2722 | rust_lex_int_test ("b'\\xFE'", 0xfe, INTEGER); | |
2723 | rust_lex_int_test ("b'\\xfE'", 0xfe, INTEGER); | |
2724 | ||
2725 | /* Test all escapes in both modes. */ | |
2726 | rust_lex_int_test ("'\\n'", '\n', INTEGER); | |
2727 | rust_lex_int_test ("'\\r'", '\r', INTEGER); | |
2728 | rust_lex_int_test ("'\\t'", '\t', INTEGER); | |
2729 | rust_lex_int_test ("'\\\\'", '\\', INTEGER); | |
2730 | rust_lex_int_test ("'\\0'", '\0', INTEGER); | |
2731 | rust_lex_int_test ("'\\''", '\'', INTEGER); | |
2732 | rust_lex_int_test ("'\\\"'", '"', INTEGER); | |
2733 | ||
2734 | rust_lex_int_test ("b'\\n'", '\n', INTEGER); | |
2735 | rust_lex_int_test ("b'\\r'", '\r', INTEGER); | |
2736 | rust_lex_int_test ("b'\\t'", '\t', INTEGER); | |
2737 | rust_lex_int_test ("b'\\\\'", '\\', INTEGER); | |
2738 | rust_lex_int_test ("b'\\0'", '\0', INTEGER); | |
2739 | rust_lex_int_test ("b'\\''", '\'', INTEGER); | |
2740 | rust_lex_int_test ("b'\\\"'", '"', INTEGER); | |
2741 | ||
2742 | rust_lex_exception_test ("'z", "Unterminated character literal"); | |
2743 | rust_lex_exception_test ("b'\\x0'", "Not enough hex digits seen"); | |
2744 | rust_lex_exception_test ("b'\\u{0}'", "Unicode escape in byte literal"); | |
2745 | rust_lex_exception_test ("'\\x0'", "Not enough hex digits seen"); | |
2746 | rust_lex_exception_test ("'\\u0'", "Missing '{' in Unicode escape"); | |
2747 | rust_lex_exception_test ("'\\u{0", "Missing '}' in Unicode escape"); | |
2748 | rust_lex_exception_test ("'\\u{0000007}", "Overlong hex escape"); | |
2749 | rust_lex_exception_test ("'\\u{}", "Not enough hex digits seen"); | |
2750 | rust_lex_exception_test ("'\\Q'", "Invalid escape \\Q in literal"); | |
2751 | rust_lex_exception_test ("b'\\Q'", "Invalid escape \\Q in literal"); | |
2752 | ||
2753 | rust_lex_int_test ("23", 23, DECIMAL_INTEGER); | |
2754 | rust_lex_int_test ("2_344__29", 234429, INTEGER); | |
2755 | rust_lex_int_test ("0x1f", 0x1f, INTEGER); | |
2756 | rust_lex_int_test ("23usize", 23, INTEGER); | |
2757 | rust_lex_int_test ("23i32", 23, INTEGER); | |
2758 | rust_lex_int_test ("0x1_f", 0x1f, INTEGER); | |
2759 | rust_lex_int_test ("0b1_101011__", 0x6b, INTEGER); | |
2760 | rust_lex_int_test ("0o001177i64", 639, INTEGER); | |
2761 | ||
2762 | rust_lex_test_trailing_dot (); | |
2763 | ||
2764 | rust_lex_test_one ("23.", FLOAT); | |
2765 | rust_lex_test_one ("23.99f32", FLOAT); | |
2766 | rust_lex_test_one ("23e7", FLOAT); | |
2767 | rust_lex_test_one ("23E-7", FLOAT); | |
2768 | rust_lex_test_one ("23e+7", FLOAT); | |
2769 | rust_lex_test_one ("23.99e+7f64", FLOAT); | |
2770 | rust_lex_test_one ("23.82f32", FLOAT); | |
2771 | ||
2772 | rust_lex_stringish_test ("hibob", "hibob", IDENT); | |
2773 | rust_lex_stringish_test ("hibob__93", "hibob__93", IDENT); | |
2774 | rust_lex_stringish_test ("thread", "thread", IDENT); | |
2775 | ||
2776 | rust_lex_stringish_test ("\"string\"", "string", STRING); | |
2777 | rust_lex_stringish_test ("\"str\\ting\"", "str\ting", STRING); | |
2778 | rust_lex_stringish_test ("\"str\\\"ing\"", "str\"ing", STRING); | |
2779 | rust_lex_stringish_test ("r\"str\\ing\"", "str\\ing", STRING); | |
2780 | rust_lex_stringish_test ("r#\"str\\ting\"#", "str\\ting", STRING); | |
2781 | rust_lex_stringish_test ("r###\"str\\\"ing\"###", "str\\\"ing", STRING); | |
2782 | ||
2783 | rust_lex_stringish_test ("b\"string\"", "string", BYTESTRING); | |
2784 | rust_lex_stringish_test ("b\"\x73tring\"", "string", BYTESTRING); | |
2785 | rust_lex_stringish_test ("b\"str\\\"ing\"", "str\"ing", BYTESTRING); | |
2786 | rust_lex_stringish_test ("br####\"\\x73tring\"####", "\\x73tring", | |
2787 | BYTESTRING); | |
2788 | ||
2789 | for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i) | |
2790 | rust_lex_test_one (identifier_tokens[i].name, identifier_tokens[i].value); | |
2791 | ||
2792 | for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i) | |
2793 | rust_lex_test_one (operator_tokens[i].name, operator_tokens[i].value); | |
2794 | ||
2795 | rust_lex_test_completion (); | |
2796 | rust_lex_test_push_back (); | |
c44af4eb TT |
2797 | } |
2798 | ||
2799 | #endif /* GDB_SELF_TEST */ | |
2800 | ||
2801 | void | |
2802 | _initialize_rust_exp (void) | |
2803 | { | |
2804 | int code = regcomp (&number_regex, number_regex_text, REG_EXTENDED); | |
2805 | /* If the regular expression was incorrect, it was a programming | |
2806 | error. */ | |
2807 | gdb_assert (code == 0); | |
2808 | ||
2809 | #if GDB_SELF_TEST | |
1526853e | 2810 | selftests::register_test ("rust-lex", rust_lex_tests); |
c44af4eb TT |
2811 | #endif |
2812 | } |