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c44af4eb TT |
1 | /* Rust language support routines for GDB, the GNU debugger. |
2 | ||
3666a048 | 3 | Copyright (C) 2016-2021 Free Software Foundation, Inc. |
c44af4eb TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | ||
22 | #include <ctype.h> | |
23 | ||
24 | #include "block.h" | |
25 | #include "c-lang.h" | |
26 | #include "charset.h" | |
27 | #include "cp-support.h" | |
8b302db8 | 28 | #include "demangle.h" |
c44af4eb TT |
29 | #include "gdbarch.h" |
30 | #include "infcall.h" | |
31 | #include "objfiles.h" | |
71a3c369 | 32 | #include "psymtab.h" |
c44af4eb | 33 | #include "rust-lang.h" |
a33ccfc7 | 34 | #include "typeprint.h" |
c44af4eb TT |
35 | #include "valprint.h" |
36 | #include "varobj.h" | |
a33ccfc7 | 37 | #include <algorithm> |
ab8b80a8 TT |
38 | #include <string> |
39 | #include <vector> | |
7f6aba03 | 40 | #include "cli/cli-style.h" |
af30c400 | 41 | #include "parser-defs.h" |
6fab4359 | 42 | #include "rust-exp.h" |
c44af4eb | 43 | |
c9317f21 | 44 | /* See rust-lang.h. */ |
c44af4eb | 45 | |
c9317f21 TT |
46 | const char * |
47 | rust_last_path_segment (const char *path) | |
c44af4eb TT |
48 | { |
49 | const char *result = strrchr (path, ':'); | |
50 | ||
51 | if (result == NULL) | |
c9317f21 | 52 | return path; |
c44af4eb TT |
53 | return result + 1; |
54 | } | |
55 | ||
03c85b11 | 56 | /* See rust-lang.h. */ |
c44af4eb | 57 | |
03c85b11 | 58 | std::string |
c44af4eb TT |
59 | rust_crate_for_block (const struct block *block) |
60 | { | |
61 | const char *scope = block_scope (block); | |
62 | ||
63 | if (scope[0] == '\0') | |
03c85b11 | 64 | return std::string (); |
c44af4eb | 65 | |
03c85b11 | 66 | return std::string (scope, cp_find_first_component (scope)); |
c44af4eb TT |
67 | } |
68 | ||
c9317f21 TT |
69 | /* Return true if TYPE, which must be a struct type, represents a Rust |
70 | enum. */ | |
c44af4eb | 71 | |
b96645f1 | 72 | static bool |
9c6a1327 | 73 | rust_enum_p (struct type *type) |
b96645f1 | 74 | { |
9c6a1327 TT |
75 | /* is_dynamic_type will return true if any field has a dynamic |
76 | attribute -- but we only want to check the top level. */ | |
77 | return TYPE_HAS_VARIANT_PARTS (type); | |
b96645f1 MG |
78 | } |
79 | ||
9c6a1327 TT |
80 | /* Return true if TYPE, which must be an already-resolved enum type, |
81 | has no variants. */ | |
098b2108 TT |
82 | |
83 | static bool | |
84 | rust_empty_enum_p (const struct type *type) | |
85 | { | |
1f704f76 | 86 | return type->num_fields () == 0; |
098b2108 TT |
87 | } |
88 | ||
9c6a1327 TT |
89 | /* Given an already-resolved enum type and contents, find which |
90 | variant is active. */ | |
c44af4eb | 91 | |
9c6a1327 TT |
92 | static int |
93 | rust_enum_variant (struct type *type) | |
c44af4eb | 94 | { |
9c6a1327 | 95 | /* The active variant is simply the first non-artificial field. */ |
1f704f76 | 96 | for (int i = 0; i < type->num_fields (); ++i) |
9c6a1327 TT |
97 | if (!TYPE_FIELD_ARTIFICIAL (type, i)) |
98 | return i; | |
c44af4eb | 99 | |
9c6a1327 TT |
100 | /* Perhaps we could get here by trying to print an Ada variant |
101 | record in Rust mode. Unlikely, but an error is safer than an | |
102 | assert. */ | |
103 | error (_("Could not find active enum variant")); | |
c44af4eb TT |
104 | } |
105 | ||
106 | /* See rust-lang.h. */ | |
107 | ||
65c40c95 | 108 | bool |
c44af4eb TT |
109 | rust_tuple_type_p (struct type *type) |
110 | { | |
111 | /* The current implementation is a bit of a hack, but there's | |
112 | nothing else in the debuginfo to distinguish a tuple from a | |
113 | struct. */ | |
78134374 | 114 | return (type->code () == TYPE_CODE_STRUCT |
7d93a1e0 SM |
115 | && type->name () != NULL |
116 | && type->name ()[0] == '('); | |
c44af4eb TT |
117 | } |
118 | ||
c44af4eb | 119 | /* Return true if all non-static fields of a structlike type are in a |
c9317f21 | 120 | sequence like __0, __1, __2. */ |
c44af4eb | 121 | |
65c40c95 | 122 | static bool |
c9317f21 | 123 | rust_underscore_fields (struct type *type) |
c44af4eb TT |
124 | { |
125 | int i, field_number; | |
126 | ||
127 | field_number = 0; | |
128 | ||
78134374 | 129 | if (type->code () != TYPE_CODE_STRUCT) |
65c40c95 | 130 | return false; |
1f704f76 | 131 | for (i = 0; i < type->num_fields (); ++i) |
c44af4eb | 132 | { |
ceacbf6e | 133 | if (!field_is_static (&type->field (i))) |
c44af4eb | 134 | { |
c9317f21 | 135 | char buf[20]; |
c44af4eb | 136 | |
c9317f21 TT |
137 | xsnprintf (buf, sizeof (buf), "__%d", field_number); |
138 | if (strcmp (buf, TYPE_FIELD_NAME (type, i)) != 0) | |
139 | return false; | |
140 | field_number++; | |
c44af4eb TT |
141 | } |
142 | } | |
65c40c95 | 143 | return true; |
c44af4eb TT |
144 | } |
145 | ||
146 | /* See rust-lang.h. */ | |
147 | ||
65c40c95 | 148 | bool |
c44af4eb TT |
149 | rust_tuple_struct_type_p (struct type *type) |
150 | { | |
12df5c00 TT |
151 | /* This is just an approximation until DWARF can represent Rust more |
152 | precisely. We exclude zero-length structs because they may not | |
153 | be tuple structs, and there's no way to tell. */ | |
1f704f76 | 154 | return type->num_fields () > 0 && rust_underscore_fields (type); |
c44af4eb TT |
155 | } |
156 | ||
157 | /* Return true if TYPE is a slice type, otherwise false. */ | |
158 | ||
65c40c95 | 159 | static bool |
c44af4eb TT |
160 | rust_slice_type_p (struct type *type) |
161 | { | |
78134374 | 162 | return (type->code () == TYPE_CODE_STRUCT |
7d93a1e0 SM |
163 | && type->name () != NULL |
164 | && (strncmp (type->name (), "&[", 2) == 0 | |
165 | || strcmp (type->name (), "&str") == 0)); | |
c44af4eb TT |
166 | } |
167 | ||
168 | /* Return true if TYPE is a range type, otherwise false. */ | |
169 | ||
65c40c95 | 170 | static bool |
c44af4eb TT |
171 | rust_range_type_p (struct type *type) |
172 | { | |
173 | int i; | |
174 | ||
78134374 | 175 | if (type->code () != TYPE_CODE_STRUCT |
1f704f76 | 176 | || type->num_fields () > 2 |
7d93a1e0 SM |
177 | || type->name () == NULL |
178 | || strstr (type->name (), "::Range") == NULL) | |
65c40c95 | 179 | return false; |
c44af4eb | 180 | |
1f704f76 | 181 | if (type->num_fields () == 0) |
65c40c95 | 182 | return true; |
c44af4eb TT |
183 | |
184 | i = 0; | |
185 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
186 | { | |
1f704f76 | 187 | if (type->num_fields () == 1) |
65c40c95 | 188 | return true; |
c44af4eb TT |
189 | i = 1; |
190 | } | |
1f704f76 | 191 | else if (type->num_fields () == 2) |
c44af4eb TT |
192 | { |
193 | /* First field had to be "start". */ | |
65c40c95 | 194 | return false; |
c44af4eb TT |
195 | } |
196 | ||
197 | return strcmp (TYPE_FIELD_NAME (type, i), "end") == 0; | |
198 | } | |
199 | ||
6873858b TT |
200 | /* Return true if TYPE is an inclusive range type, otherwise false. |
201 | This is only valid for types which are already known to be range | |
202 | types. */ | |
203 | ||
204 | static bool | |
205 | rust_inclusive_range_type_p (struct type *type) | |
206 | { | |
7d93a1e0 SM |
207 | return (strstr (type->name (), "::RangeInclusive") != NULL |
208 | || strstr (type->name (), "::RangeToInclusive") != NULL); | |
6873858b TT |
209 | } |
210 | ||
c44af4eb TT |
211 | /* Return true if TYPE seems to be the type "u8", otherwise false. */ |
212 | ||
65c40c95 | 213 | static bool |
c44af4eb TT |
214 | rust_u8_type_p (struct type *type) |
215 | { | |
78134374 | 216 | return (type->code () == TYPE_CODE_INT |
c6d940a9 | 217 | && type->is_unsigned () |
c44af4eb TT |
218 | && TYPE_LENGTH (type) == 1); |
219 | } | |
220 | ||
221 | /* Return true if TYPE is a Rust character type. */ | |
222 | ||
65c40c95 | 223 | static bool |
c44af4eb TT |
224 | rust_chartype_p (struct type *type) |
225 | { | |
78134374 | 226 | return (type->code () == TYPE_CODE_CHAR |
c44af4eb | 227 | && TYPE_LENGTH (type) == 4 |
c6d940a9 | 228 | && type->is_unsigned ()); |
c44af4eb TT |
229 | } |
230 | ||
71a3c369 TT |
231 | /* If VALUE represents a trait object pointer, return the underlying |
232 | pointer with the correct (i.e., runtime) type. Otherwise, return | |
233 | NULL. */ | |
234 | ||
235 | static struct value * | |
236 | rust_get_trait_object_pointer (struct value *value) | |
237 | { | |
238 | struct type *type = check_typedef (value_type (value)); | |
239 | ||
1f704f76 | 240 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) |
71a3c369 TT |
241 | return NULL; |
242 | ||
243 | /* Try to be a bit resilient if the ABI changes. */ | |
244 | int vtable_field = 0; | |
245 | for (int i = 0; i < 2; ++i) | |
246 | { | |
247 | if (strcmp (TYPE_FIELD_NAME (type, i), "vtable") == 0) | |
248 | vtable_field = i; | |
249 | else if (strcmp (TYPE_FIELD_NAME (type, i), "pointer") != 0) | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | CORE_ADDR vtable = value_as_address (value_field (value, vtable_field)); | |
254 | struct symbol *symbol = find_symbol_at_address (vtable); | |
cf724bc9 | 255 | if (symbol == NULL || symbol->subclass != SYMBOL_RUST_VTABLE) |
71a3c369 TT |
256 | return NULL; |
257 | ||
258 | struct rust_vtable_symbol *vtable_sym | |
259 | = static_cast<struct rust_vtable_symbol *> (symbol); | |
260 | struct type *pointer_type = lookup_pointer_type (vtable_sym->concrete_type); | |
261 | return value_cast (pointer_type, value_field (value, 1 - vtable_field)); | |
262 | } | |
263 | ||
c44af4eb TT |
264 | \f |
265 | ||
1c485265 | 266 | /* See language.h. */ |
c44af4eb | 267 | |
1c485265 AB |
268 | void |
269 | rust_language::printstr (struct ui_file *stream, struct type *type, | |
270 | const gdb_byte *string, unsigned int length, | |
271 | const char *user_encoding, int force_ellipses, | |
272 | const struct value_print_options *options) const | |
c44af4eb TT |
273 | { |
274 | /* Rust always uses UTF-8, but let the caller override this if need | |
275 | be. */ | |
276 | const char *encoding = user_encoding; | |
277 | if (user_encoding == NULL || !*user_encoding) | |
278 | { | |
279 | /* In Rust strings, characters are "u8". */ | |
280 | if (rust_u8_type_p (type)) | |
281 | encoding = "UTF-8"; | |
282 | else | |
283 | { | |
284 | /* This is probably some C string, so let's let C deal with | |
285 | it. */ | |
286 | c_printstr (stream, type, string, length, user_encoding, | |
287 | force_ellipses, options); | |
288 | return; | |
289 | } | |
290 | } | |
291 | ||
292 | /* This is not ideal as it doesn't use our character printer. */ | |
293 | generic_printstr (stream, type, string, length, encoding, force_ellipses, | |
294 | '"', 0, options); | |
295 | } | |
296 | ||
297 | \f | |
298 | ||
45320ffa TT |
299 | /* Helper function to print a string slice. */ |
300 | ||
301 | static void | |
302 | rust_val_print_str (struct ui_file *stream, struct value *val, | |
303 | const struct value_print_options *options) | |
304 | { | |
305 | struct value *base = value_struct_elt (&val, NULL, "data_ptr", NULL, | |
306 | "slice"); | |
307 | struct value *len = value_struct_elt (&val, NULL, "length", NULL, "slice"); | |
308 | ||
309 | val_print_string (TYPE_TARGET_TYPE (value_type (base)), "UTF-8", | |
310 | value_as_address (base), value_as_long (len), stream, | |
311 | options); | |
312 | } | |
313 | ||
1c485265 | 314 | /* See rust-lang.h. */ |
b96645f1 | 315 | |
1c485265 AB |
316 | void |
317 | rust_language::val_print_struct | |
318 | (struct value *val, struct ui_file *stream, int recurse, | |
319 | const struct value_print_options *options) const | |
b96645f1 MG |
320 | { |
321 | int i; | |
322 | int first_field; | |
5f56f7cb | 323 | struct type *type = check_typedef (value_type (val)); |
45320ffa | 324 | |
7d93a1e0 | 325 | if (rust_slice_type_p (type) && strcmp (type->name (), "&str") == 0) |
45320ffa | 326 | { |
80062eb9 AB |
327 | /* If what we are printing here is actually a string within a |
328 | structure then VAL will be the original parent value, while TYPE | |
329 | will be the type of the structure representing the string we want | |
330 | to print. | |
331 | However, RUST_VAL_PRINT_STR looks up the fields of the string | |
332 | inside VAL, assuming that VAL is the string. | |
333 | So, recreate VAL as a value representing just the string. */ | |
5f56f7cb | 334 | val = value_at_lazy (type, value_address (val)); |
45320ffa TT |
335 | rust_val_print_str (stream, val, options); |
336 | return; | |
337 | } | |
338 | ||
65c40c95 TT |
339 | bool is_tuple = rust_tuple_type_p (type); |
340 | bool is_tuple_struct = !is_tuple && rust_tuple_struct_type_p (type); | |
b96645f1 MG |
341 | struct value_print_options opts; |
342 | ||
343 | if (!is_tuple) | |
344 | { | |
7d93a1e0 | 345 | if (type->name () != NULL) |
dda83cd7 | 346 | fprintf_filtered (stream, "%s", type->name ()); |
b96645f1 | 347 | |
1f704f76 | 348 | if (type->num_fields () == 0) |
dda83cd7 | 349 | return; |
b96645f1 | 350 | |
7d93a1e0 | 351 | if (type->name () != NULL) |
dda83cd7 | 352 | fputs_filtered (" ", stream); |
b96645f1 MG |
353 | } |
354 | ||
355 | if (is_tuple || is_tuple_struct) | |
356 | fputs_filtered ("(", stream); | |
357 | else | |
358 | fputs_filtered ("{", stream); | |
359 | ||
360 | opts = *options; | |
361 | opts.deref_ref = 0; | |
362 | ||
363 | first_field = 1; | |
1f704f76 | 364 | for (i = 0; i < type->num_fields (); ++i) |
b96645f1 | 365 | { |
ceacbf6e | 366 | if (field_is_static (&type->field (i))) |
dda83cd7 | 367 | continue; |
b96645f1 MG |
368 | |
369 | if (!first_field) | |
dda83cd7 | 370 | fputs_filtered (",", stream); |
b96645f1 MG |
371 | |
372 | if (options->prettyformat) | |
dda83cd7 | 373 | { |
b50f188d TT |
374 | fputs_filtered ("\n", stream); |
375 | print_spaces_filtered (2 + 2 * recurse, stream); | |
dda83cd7 | 376 | } |
b96645f1 | 377 | else if (!first_field) |
dda83cd7 | 378 | fputs_filtered (" ", stream); |
b96645f1 MG |
379 | |
380 | first_field = 0; | |
381 | ||
382 | if (!is_tuple && !is_tuple_struct) | |
dda83cd7 | 383 | { |
3f0cbb04 TT |
384 | fputs_styled (TYPE_FIELD_NAME (type, i), |
385 | variable_name_style.style (), stream); | |
b50f188d | 386 | fputs_filtered (": ", stream); |
dda83cd7 | 387 | } |
b96645f1 | 388 | |
887e7158 TT |
389 | common_val_print (value_field (val, i), stream, recurse + 1, &opts, |
390 | this); | |
b96645f1 MG |
391 | } |
392 | ||
393 | if (options->prettyformat) | |
394 | { | |
395 | fputs_filtered ("\n", stream); | |
396 | print_spaces_filtered (2 * recurse, stream); | |
397 | } | |
398 | ||
399 | if (is_tuple || is_tuple_struct) | |
400 | fputs_filtered (")", stream); | |
401 | else | |
402 | fputs_filtered ("}", stream); | |
403 | } | |
404 | ||
1c485265 | 405 | /* See rust-lang.h. */ |
c9317f21 | 406 | |
1c485265 AB |
407 | void |
408 | rust_language::print_enum (struct value *val, struct ui_file *stream, | |
409 | int recurse, | |
410 | const struct value_print_options *options) const | |
c9317f21 TT |
411 | { |
412 | struct value_print_options opts = *options; | |
5f56f7cb | 413 | struct type *type = check_typedef (value_type (val)); |
c9317f21 TT |
414 | |
415 | opts.deref_ref = 0; | |
416 | ||
9c6a1327 TT |
417 | gdb_assert (rust_enum_p (type)); |
418 | gdb::array_view<const gdb_byte> view (value_contents_for_printing (val), | |
419 | TYPE_LENGTH (value_type (val))); | |
420 | type = resolve_dynamic_type (type, view, value_address (val)); | |
421 | ||
098b2108 TT |
422 | if (rust_empty_enum_p (type)) |
423 | { | |
424 | /* Print the enum type name here to be more clear. */ | |
7f6aba03 | 425 | fprintf_filtered (stream, _("%s {%p[<No data fields>%p]}"), |
7d93a1e0 | 426 | type->name (), |
7f6aba03 | 427 | metadata_style.style ().ptr (), nullptr); |
098b2108 TT |
428 | return; |
429 | } | |
430 | ||
9c6a1327 TT |
431 | int variant_fieldno = rust_enum_variant (type); |
432 | val = value_field (val, variant_fieldno); | |
940da03e | 433 | struct type *variant_type = type->field (variant_fieldno).type (); |
c9317f21 | 434 | |
1f704f76 | 435 | int nfields = variant_type->num_fields (); |
c9317f21 TT |
436 | |
437 | bool is_tuple = rust_tuple_struct_type_p (variant_type); | |
438 | ||
7d93a1e0 | 439 | fprintf_filtered (stream, "%s", variant_type->name ()); |
c9317f21 TT |
440 | if (nfields == 0) |
441 | { | |
442 | /* In case of a nullary variant like 'None', just output | |
443 | the name. */ | |
444 | return; | |
445 | } | |
446 | ||
447 | /* In case of a non-nullary variant, we output 'Foo(x,y,z)'. */ | |
448 | if (is_tuple) | |
449 | fprintf_filtered (stream, "("); | |
450 | else | |
451 | { | |
452 | /* struct variant. */ | |
453 | fprintf_filtered (stream, "{"); | |
454 | } | |
455 | ||
456 | bool first_field = true; | |
1f704f76 | 457 | for (int j = 0; j < variant_type->num_fields (); j++) |
c9317f21 TT |
458 | { |
459 | if (!first_field) | |
460 | fputs_filtered (", ", stream); | |
461 | first_field = false; | |
462 | ||
463 | if (!is_tuple) | |
3f0cbb04 TT |
464 | fprintf_filtered (stream, "%ps: ", |
465 | styled_string (variable_name_style.style (), | |
466 | TYPE_FIELD_NAME (variant_type, j))); | |
c9317f21 | 467 | |
887e7158 TT |
468 | common_val_print (value_field (val, j), stream, recurse + 1, &opts, |
469 | this); | |
c9317f21 TT |
470 | } |
471 | ||
472 | if (is_tuple) | |
473 | fputs_filtered (")", stream); | |
474 | else | |
475 | fputs_filtered ("}", stream); | |
476 | } | |
477 | ||
c44af4eb TT |
478 | static const struct generic_val_print_decorations rust_decorations = |
479 | { | |
480 | /* Complex isn't used in Rust, but we provide C-ish values just in | |
481 | case. */ | |
482 | "", | |
483 | " + ", | |
484 | " * I", | |
485 | "true", | |
486 | "false", | |
921d8f54 | 487 | "()", |
c44af4eb TT |
488 | "[", |
489 | "]" | |
490 | }; | |
491 | ||
1c485265 AB |
492 | /* See language.h. */ |
493 | ||
494 | void | |
495 | rust_language::value_print_inner | |
496 | (struct value *val, struct ui_file *stream, int recurse, | |
497 | const struct value_print_options *options) const | |
5f56f7cb TT |
498 | { |
499 | struct value_print_options opts = *options; | |
500 | opts.deref_ref = 1; | |
501 | ||
502 | if (opts.prettyformat == Val_prettyformat_default) | |
503 | opts.prettyformat = (opts.prettyformat_structs | |
504 | ? Val_prettyformat : Val_no_prettyformat); | |
505 | ||
506 | struct type *type = check_typedef (value_type (val)); | |
78134374 | 507 | switch (type->code ()) |
c44af4eb TT |
508 | { |
509 | case TYPE_CODE_PTR: | |
510 | { | |
511 | LONGEST low_bound, high_bound; | |
512 | ||
78134374 | 513 | if (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ARRAY |
c44af4eb TT |
514 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) |
515 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
5f56f7cb TT |
516 | &high_bound)) |
517 | { | |
518 | /* We have a pointer to a byte string, so just print | |
519 | that. */ | |
520 | struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type)); | |
521 | CORE_ADDR addr = value_as_address (val); | |
8ee511af | 522 | struct gdbarch *arch = type->arch (); |
c44af4eb | 523 | |
5f56f7cb TT |
524 | if (opts.addressprint) |
525 | { | |
526 | fputs_filtered (paddress (arch, addr), stream); | |
527 | fputs_filtered (" ", stream); | |
528 | } | |
c44af4eb | 529 | |
5f56f7cb TT |
530 | fputs_filtered ("b", stream); |
531 | val_print_string (TYPE_TARGET_TYPE (elttype), "ASCII", addr, | |
532 | high_bound - low_bound + 1, stream, | |
533 | &opts); | |
534 | break; | |
535 | } | |
c44af4eb | 536 | } |
5f56f7cb | 537 | goto generic_print; |
c44af4eb | 538 | |
c44af4eb TT |
539 | case TYPE_CODE_INT: |
540 | /* Recognize the unit type. */ | |
c6d940a9 | 541 | if (type->is_unsigned () && TYPE_LENGTH (type) == 0 |
7d93a1e0 | 542 | && type->name () != NULL && strcmp (type->name (), "()") == 0) |
c44af4eb TT |
543 | { |
544 | fputs_filtered ("()", stream); | |
545 | break; | |
546 | } | |
547 | goto generic_print; | |
548 | ||
549 | case TYPE_CODE_STRING: | |
550 | { | |
c44af4eb TT |
551 | LONGEST low_bound, high_bound; |
552 | ||
553 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
554 | error (_("Could not determine the array bounds")); | |
555 | ||
556 | /* If we see a plain TYPE_CODE_STRING, then we're printing a | |
557 | byte string, hence the choice of "ASCII" as the | |
558 | encoding. */ | |
559 | fputs_filtered ("b", stream); | |
1c485265 AB |
560 | printstr (stream, TYPE_TARGET_TYPE (type), |
561 | value_contents_for_printing (val), | |
562 | high_bound - low_bound + 1, "ASCII", 0, &opts); | |
c44af4eb TT |
563 | } |
564 | break; | |
565 | ||
566 | case TYPE_CODE_ARRAY: | |
567 | { | |
568 | LONGEST low_bound, high_bound; | |
569 | ||
570 | if (get_array_bounds (type, &low_bound, &high_bound) | |
571 | && high_bound - low_bound + 1 == 0) | |
572 | fputs_filtered ("[]", stream); | |
573 | else | |
574 | goto generic_print; | |
575 | } | |
576 | break; | |
577 | ||
578 | case TYPE_CODE_UNION: | |
c9317f21 TT |
579 | /* Untagged unions are printed as if they are structs. Since |
580 | the field bit positions overlap in the debuginfo, the code | |
581 | for printing a union is same as that for a struct, the only | |
582 | difference is that the input type will have overlapping | |
583 | fields. */ | |
5f56f7cb | 584 | val_print_struct (val, stream, recurse, &opts); |
c44af4eb TT |
585 | break; |
586 | ||
587 | case TYPE_CODE_STRUCT: | |
c9317f21 | 588 | if (rust_enum_p (type)) |
1c485265 | 589 | print_enum (val, stream, recurse, &opts); |
c9317f21 | 590 | else |
5f56f7cb | 591 | val_print_struct (val, stream, recurse, &opts); |
b96645f1 | 592 | break; |
c44af4eb | 593 | |
b96645f1 MG |
594 | default: |
595 | generic_print: | |
596 | /* Nothing special yet. */ | |
5f56f7cb | 597 | generic_value_print (val, stream, recurse, &opts, &rust_decorations); |
b96645f1 MG |
598 | } |
599 | } | |
c44af4eb | 600 | |
b96645f1 | 601 | \f |
c44af4eb | 602 | |
b96645f1 | 603 | static void |
c9317f21 TT |
604 | rust_internal_print_type (struct type *type, const char *varstring, |
605 | struct ui_file *stream, int show, int level, | |
606 | const struct type_print_options *flags, | |
a33ccfc7 | 607 | bool for_rust_enum, print_offset_data *podata); |
b96645f1 MG |
608 | |
609 | /* Print a struct or union typedef. */ | |
610 | static void | |
611 | rust_print_struct_def (struct type *type, const char *varstring, | |
b50f188d | 612 | struct ui_file *stream, int show, int level, |
c9317f21 | 613 | const struct type_print_options *flags, |
a33ccfc7 | 614 | bool for_rust_enum, print_offset_data *podata) |
b96645f1 | 615 | { |
b50f188d TT |
616 | /* Print a tuple type simply. */ |
617 | if (rust_tuple_type_p (type)) | |
618 | { | |
7d93a1e0 | 619 | fputs_filtered (type->name (), stream); |
b50f188d TT |
620 | return; |
621 | } | |
c44af4eb | 622 | |
b50f188d TT |
623 | /* If we see a base class, delegate to C. */ |
624 | if (TYPE_N_BASECLASSES (type) > 0) | |
625 | c_print_type (type, varstring, stream, show, level, flags); | |
c44af4eb | 626 | |
a33ccfc7 TT |
627 | if (flags->print_offsets) |
628 | { | |
629 | /* Temporarily bump the level so that the output lines up | |
630 | correctly. */ | |
631 | level += 2; | |
632 | } | |
633 | ||
c9317f21 TT |
634 | /* Compute properties of TYPE here because, in the enum case, the |
635 | rest of the code ends up looking only at the variant part. */ | |
7d93a1e0 | 636 | const char *tagname = type->name (); |
c9317f21 TT |
637 | bool is_tuple_struct = rust_tuple_struct_type_p (type); |
638 | bool is_tuple = rust_tuple_type_p (type); | |
639 | bool is_enum = rust_enum_p (type); | |
b96645f1 | 640 | |
c9317f21 TT |
641 | if (for_rust_enum) |
642 | { | |
643 | /* Already printing an outer enum, so nothing to print here. */ | |
644 | } | |
645 | else | |
646 | { | |
647 | /* This code path is also used by unions and enums. */ | |
648 | if (is_enum) | |
649 | { | |
650 | fputs_filtered ("enum ", stream); | |
24e99c6c | 651 | dynamic_prop *prop = type->dyn_prop (DYN_PROP_VARIANT_PARTS); |
8c2e4e06 SM |
652 | if (prop != nullptr && prop->kind () == PROP_TYPE) |
653 | type = prop->original_type (); | |
c9317f21 | 654 | } |
78134374 | 655 | else if (type->code () == TYPE_CODE_STRUCT) |
c9317f21 TT |
656 | fputs_filtered ("struct ", stream); |
657 | else | |
658 | fputs_filtered ("union ", stream); | |
b96645f1 | 659 | |
c9317f21 TT |
660 | if (tagname != NULL) |
661 | fputs_filtered (tagname, stream); | |
662 | } | |
b96645f1 | 663 | |
1f704f76 | 664 | if (type->num_fields () == 0 && !is_tuple) |
b50f188d | 665 | return; |
a33ccfc7 | 666 | if (for_rust_enum && !flags->print_offsets) |
c9317f21 TT |
667 | fputs_filtered (is_tuple_struct ? "(" : "{", stream); |
668 | else | |
669 | fputs_filtered (is_tuple_struct ? " (\n" : " {\n", stream); | |
c44af4eb | 670 | |
a33ccfc7 TT |
671 | /* When printing offsets, we rearrange the fields into storage |
672 | order. This lets us show holes more clearly. We work using | |
673 | field indices here because it simplifies calls to | |
674 | print_offset_data::update below. */ | |
675 | std::vector<int> fields; | |
1f704f76 | 676 | for (int i = 0; i < type->num_fields (); ++i) |
b50f188d | 677 | { |
ceacbf6e | 678 | if (field_is_static (&type->field (i))) |
b50f188d | 679 | continue; |
9c6a1327 | 680 | if (is_enum && TYPE_FIELD_ARTIFICIAL (type, i)) |
a33ccfc7 TT |
681 | continue; |
682 | fields.push_back (i); | |
683 | } | |
684 | if (flags->print_offsets) | |
685 | std::sort (fields.begin (), fields.end (), | |
686 | [&] (int a, int b) | |
687 | { | |
688 | return (TYPE_FIELD_BITPOS (type, a) | |
689 | < TYPE_FIELD_BITPOS (type, b)); | |
690 | }); | |
691 | ||
692 | for (int i : fields) | |
693 | { | |
694 | QUIT; | |
695 | ||
ceacbf6e | 696 | gdb_assert (!field_is_static (&type->field (i))); |
9c6a1327 | 697 | gdb_assert (! (is_enum && TYPE_FIELD_ARTIFICIAL (type, i))); |
a33ccfc7 TT |
698 | |
699 | if (flags->print_offsets) | |
700 | podata->update (type, i, stream); | |
b50f188d TT |
701 | |
702 | /* We'd like to print "pub" here as needed, but rustc | |
703 | doesn't emit the debuginfo, and our types don't have | |
704 | cplus_struct_type attached. */ | |
705 | ||
706 | /* For a tuple struct we print the type but nothing | |
707 | else. */ | |
a33ccfc7 | 708 | if (!for_rust_enum || flags->print_offsets) |
c9317f21 TT |
709 | print_spaces_filtered (level + 2, stream); |
710 | if (is_enum) | |
3f0cbb04 TT |
711 | fputs_styled (TYPE_FIELD_NAME (type, i), variable_name_style.style (), |
712 | stream); | |
c9317f21 | 713 | else if (!is_tuple_struct) |
3f0cbb04 TT |
714 | fprintf_filtered (stream, "%ps: ", |
715 | styled_string (variable_name_style.style (), | |
716 | TYPE_FIELD_NAME (type, i))); | |
b50f188d | 717 | |
940da03e | 718 | rust_internal_print_type (type->field (i).type (), NULL, |
53d7df28 | 719 | stream, (is_enum ? show : show - 1), |
a33ccfc7 TT |
720 | level + 2, flags, is_enum, podata); |
721 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 | 722 | fputs_filtered (",\n", stream); |
a33ccfc7 TT |
723 | /* Note that this check of "I" is ok because we only sorted the |
724 | fields by offset when print_offsets was set, so we won't take | |
725 | this branch in that case. */ | |
1f704f76 | 726 | else if (i + 1 < type->num_fields ()) |
c9317f21 | 727 | fputs_filtered (", ", stream); |
b50f188d | 728 | } |
c44af4eb | 729 | |
a33ccfc7 TT |
730 | if (flags->print_offsets) |
731 | { | |
732 | /* Undo the temporary level increase we did above. */ | |
733 | level -= 2; | |
734 | podata->finish (type, level, stream); | |
735 | print_spaces_filtered (print_offset_data::indentation, stream); | |
736 | if (level == 0) | |
737 | print_spaces_filtered (2, stream); | |
738 | } | |
739 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 TT |
740 | print_spaces_filtered (level, stream); |
741 | fputs_filtered (is_tuple_struct ? ")" : "}", stream); | |
c44af4eb TT |
742 | } |
743 | ||
c44af4eb TT |
744 | /* la_print_type implementation for Rust. */ |
745 | ||
746 | static void | |
c9317f21 TT |
747 | rust_internal_print_type (struct type *type, const char *varstring, |
748 | struct ui_file *stream, int show, int level, | |
749 | const struct type_print_options *flags, | |
a33ccfc7 | 750 | bool for_rust_enum, print_offset_data *podata) |
c44af4eb | 751 | { |
c44af4eb TT |
752 | QUIT; |
753 | if (show <= 0 | |
7d93a1e0 | 754 | && type->name () != NULL) |
c44af4eb | 755 | { |
921d8f54 | 756 | /* Rust calls the unit type "void" in its debuginfo, |
dda83cd7 | 757 | but we don't want to print it as that. */ |
78134374 | 758 | if (type->code () == TYPE_CODE_VOID) |
dda83cd7 | 759 | fputs_filtered ("()", stream); |
921d8f54 | 760 | else |
dda83cd7 | 761 | fputs_filtered (type->name (), stream); |
c44af4eb TT |
762 | return; |
763 | } | |
764 | ||
765 | type = check_typedef (type); | |
78134374 | 766 | switch (type->code ()) |
c44af4eb | 767 | { |
921d8f54 | 768 | case TYPE_CODE_VOID: |
c9317f21 TT |
769 | /* If we have an enum, we've already printed the type's |
770 | unqualified name, and there is nothing else to print | |
771 | here. */ | |
772 | if (!for_rust_enum) | |
773 | fputs_filtered ("()", stream); | |
921d8f54 MG |
774 | break; |
775 | ||
c44af4eb TT |
776 | case TYPE_CODE_FUNC: |
777 | /* Delegate varargs to the C printer. */ | |
a409645d | 778 | if (type->has_varargs ()) |
c44af4eb TT |
779 | goto c_printer; |
780 | ||
781 | fputs_filtered ("fn ", stream); | |
782 | if (varstring != NULL) | |
783 | fputs_filtered (varstring, stream); | |
784 | fputs_filtered ("(", stream); | |
1f704f76 | 785 | for (int i = 0; i < type->num_fields (); ++i) |
c44af4eb TT |
786 | { |
787 | QUIT; | |
788 | if (i > 0) | |
789 | fputs_filtered (", ", stream); | |
940da03e | 790 | rust_internal_print_type (type->field (i).type (), "", stream, |
a33ccfc7 | 791 | -1, 0, flags, false, podata); |
c44af4eb | 792 | } |
921d8f54 MG |
793 | fputs_filtered (")", stream); |
794 | /* If it returns unit, we can omit the return type. */ | |
78134374 | 795 | if (TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID) |
dda83cd7 SM |
796 | { |
797 | fputs_filtered (" -> ", stream); | |
798 | rust_internal_print_type (TYPE_TARGET_TYPE (type), "", stream, | |
a33ccfc7 | 799 | -1, 0, flags, false, podata); |
dda83cd7 | 800 | } |
c44af4eb TT |
801 | break; |
802 | ||
803 | case TYPE_CODE_ARRAY: | |
804 | { | |
805 | LONGEST low_bound, high_bound; | |
806 | ||
807 | fputs_filtered ("[", stream); | |
c9317f21 | 808 | rust_internal_print_type (TYPE_TARGET_TYPE (type), NULL, |
a33ccfc7 TT |
809 | stream, show - 1, level, flags, false, |
810 | podata); | |
c44af4eb | 811 | |
cf88be68 SM |
812 | if (type->bounds ()->high.kind () == PROP_LOCEXPR |
813 | || type->bounds ()->high.kind () == PROP_LOCLIST) | |
e6cf65f2 | 814 | fprintf_filtered (stream, "; variable length"); |
c44af4eb | 815 | else if (get_array_bounds (type, &low_bound, &high_bound)) |
e6cf65f2 | 816 | fprintf_filtered (stream, "; %s", |
c44af4eb TT |
817 | plongest (high_bound - low_bound + 1)); |
818 | fputs_filtered ("]", stream); | |
819 | } | |
820 | break; | |
821 | ||
c9317f21 | 822 | case TYPE_CODE_UNION: |
c44af4eb | 823 | case TYPE_CODE_STRUCT: |
c9317f21 | 824 | rust_print_struct_def (type, varstring, stream, show, level, flags, |
a33ccfc7 | 825 | for_rust_enum, podata); |
c44af4eb TT |
826 | break; |
827 | ||
828 | case TYPE_CODE_ENUM: | |
829 | { | |
b926417a | 830 | int len = 0; |
c44af4eb TT |
831 | |
832 | fputs_filtered ("enum ", stream); | |
7d93a1e0 | 833 | if (type->name () != NULL) |
c44af4eb | 834 | { |
7d93a1e0 | 835 | fputs_filtered (type->name (), stream); |
c44af4eb | 836 | fputs_filtered (" ", stream); |
7d93a1e0 | 837 | len = strlen (type->name ()); |
c44af4eb TT |
838 | } |
839 | fputs_filtered ("{\n", stream); | |
840 | ||
1f704f76 | 841 | for (int i = 0; i < type->num_fields (); ++i) |
c44af4eb TT |
842 | { |
843 | const char *name = TYPE_FIELD_NAME (type, i); | |
844 | ||
845 | QUIT; | |
846 | ||
847 | if (len > 0 | |
7d93a1e0 | 848 | && strncmp (name, type->name (), len) == 0 |
c44af4eb TT |
849 | && name[len] == ':' |
850 | && name[len + 1] == ':') | |
851 | name += len + 2; | |
32f47895 TT |
852 | fprintf_filtered (stream, "%*s%ps,\n", |
853 | level + 2, "", | |
854 | styled_string (variable_name_style.style (), | |
855 | name)); | |
c44af4eb TT |
856 | } |
857 | ||
858 | fputs_filtered ("}", stream); | |
859 | } | |
73fc52c4 TT |
860 | break; |
861 | ||
862 | case TYPE_CODE_PTR: | |
863 | { | |
7d93a1e0 SM |
864 | if (type->name () != nullptr) |
865 | fputs_filtered (type->name (), stream); | |
73fc52c4 TT |
866 | else |
867 | { | |
868 | /* We currently can't distinguish between pointers and | |
869 | references. */ | |
870 | fputs_filtered ("*mut ", stream); | |
871 | type_print (TYPE_TARGET_TYPE (type), "", stream, 0); | |
872 | } | |
873 | } | |
c44af4eb TT |
874 | break; |
875 | ||
c44af4eb TT |
876 | default: |
877 | c_printer: | |
878 | c_print_type (type, varstring, stream, show, level, flags); | |
879 | } | |
880 | } | |
881 | ||
882 | \f | |
883 | ||
c44af4eb TT |
884 | /* Like arch_composite_type, but uses TYPE to decide how to allocate |
885 | -- either on an obstack or on a gdbarch. */ | |
886 | ||
887 | static struct type * | |
888 | rust_composite_type (struct type *original, | |
889 | const char *name, | |
890 | const char *field1, struct type *type1, | |
891 | const char *field2, struct type *type2) | |
892 | { | |
893 | struct type *result = alloc_type_copy (original); | |
894 | int i, nfields, bitpos; | |
895 | ||
896 | nfields = 0; | |
897 | if (field1 != NULL) | |
898 | ++nfields; | |
899 | if (field2 != NULL) | |
900 | ++nfields; | |
901 | ||
67607e24 | 902 | result->set_code (TYPE_CODE_STRUCT); |
d0e39ea2 | 903 | result->set_name (name); |
c44af4eb | 904 | |
5e33d5f4 | 905 | result->set_num_fields (nfields); |
3cabb6b0 SM |
906 | result->set_fields |
907 | ((struct field *) TYPE_ZALLOC (result, nfields * sizeof (struct field))); | |
c44af4eb TT |
908 | |
909 | i = 0; | |
910 | bitpos = 0; | |
911 | if (field1 != NULL) | |
912 | { | |
ceacbf6e | 913 | struct field *field = &result->field (i); |
c44af4eb TT |
914 | |
915 | SET_FIELD_BITPOS (*field, bitpos); | |
916 | bitpos += TYPE_LENGTH (type1) * TARGET_CHAR_BIT; | |
917 | ||
918 | FIELD_NAME (*field) = field1; | |
5d14b6e5 | 919 | field->set_type (type1); |
c44af4eb TT |
920 | ++i; |
921 | } | |
922 | if (field2 != NULL) | |
923 | { | |
ceacbf6e | 924 | struct field *field = &result->field (i); |
2fff16dd | 925 | unsigned align = type_align (type2); |
c44af4eb TT |
926 | |
927 | if (align != 0) | |
928 | { | |
929 | int delta; | |
930 | ||
931 | align *= TARGET_CHAR_BIT; | |
932 | delta = bitpos % align; | |
933 | if (delta != 0) | |
934 | bitpos += align - delta; | |
935 | } | |
936 | SET_FIELD_BITPOS (*field, bitpos); | |
937 | ||
938 | FIELD_NAME (*field) = field2; | |
5d14b6e5 | 939 | field->set_type (type2); |
c44af4eb TT |
940 | ++i; |
941 | } | |
942 | ||
943 | if (i > 0) | |
944 | TYPE_LENGTH (result) | |
945 | = (TYPE_FIELD_BITPOS (result, i - 1) / TARGET_CHAR_BIT + | |
940da03e | 946 | TYPE_LENGTH (result->field (i - 1).type ())); |
c44af4eb TT |
947 | return result; |
948 | } | |
949 | ||
950 | /* See rust-lang.h. */ | |
951 | ||
952 | struct type * | |
953 | rust_slice_type (const char *name, struct type *elt_type, | |
954 | struct type *usize_type) | |
955 | { | |
956 | struct type *type; | |
957 | ||
958 | elt_type = lookup_pointer_type (elt_type); | |
959 | type = rust_composite_type (elt_type, name, | |
960 | "data_ptr", elt_type, | |
961 | "length", usize_type); | |
962 | ||
963 | return type; | |
964 | } | |
965 | ||
c44af4eb TT |
966 | \f |
967 | ||
01739a3b | 968 | /* A helper for rust_evaluate_subexp that handles OP_RANGE. */ |
c44af4eb | 969 | |
9db6b6dd | 970 | struct value * |
d148f803 TT |
971 | rust_range (struct type *expect_type, struct expression *exp, |
972 | enum noside noside, enum range_flag kind, | |
973 | struct value *low, struct value *high) | |
c44af4eb | 974 | { |
c44af4eb TT |
975 | struct value *addrval, *result; |
976 | CORE_ADDR addr; | |
977 | struct type *range_type; | |
978 | struct type *index_type; | |
979 | struct type *temp_type; | |
980 | const char *name; | |
981 | ||
2f1b18db | 982 | bool inclusive = !(kind & RANGE_HIGH_BOUND_EXCLUSIVE); |
c44af4eb | 983 | |
c44af4eb TT |
984 | if (low == NULL) |
985 | { | |
986 | if (high == NULL) | |
987 | { | |
988 | index_type = NULL; | |
989 | name = "std::ops::RangeFull"; | |
990 | } | |
991 | else | |
992 | { | |
993 | index_type = value_type (high); | |
6873858b TT |
994 | name = (inclusive |
995 | ? "std::ops::RangeToInclusive" : "std::ops::RangeTo"); | |
c44af4eb TT |
996 | } |
997 | } | |
998 | else | |
999 | { | |
1000 | if (high == NULL) | |
1001 | { | |
1002 | index_type = value_type (low); | |
1003 | name = "std::ops::RangeFrom"; | |
1004 | } | |
1005 | else | |
1006 | { | |
1007 | if (!types_equal (value_type (low), value_type (high))) | |
1008 | error (_("Range expression with different types")); | |
1009 | index_type = value_type (low); | |
6873858b | 1010 | name = inclusive ? "std::ops::RangeInclusive" : "std::ops::Range"; |
c44af4eb TT |
1011 | } |
1012 | } | |
1013 | ||
1014 | /* If we don't have an index type, just allocate this on the | |
1015 | arch. Here any type will do. */ | |
1016 | temp_type = (index_type == NULL | |
1017 | ? language_bool_type (exp->language_defn, exp->gdbarch) | |
1018 | : index_type); | |
1019 | /* It would be nicer to cache the range type. */ | |
1020 | range_type = rust_composite_type (temp_type, name, | |
1021 | low == NULL ? NULL : "start", index_type, | |
1022 | high == NULL ? NULL : "end", index_type); | |
1023 | ||
1024 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1025 | return value_zero (range_type, lval_memory); | |
1026 | ||
1027 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (range_type)); | |
1028 | addr = value_as_long (addrval); | |
1029 | result = value_at_lazy (range_type, addr); | |
1030 | ||
1031 | if (low != NULL) | |
1032 | { | |
1033 | struct value *start = value_struct_elt (&result, NULL, "start", NULL, | |
1034 | "range"); | |
1035 | ||
1036 | value_assign (start, low); | |
1037 | } | |
1038 | ||
1039 | if (high != NULL) | |
1040 | { | |
1041 | struct value *end = value_struct_elt (&result, NULL, "end", NULL, | |
1042 | "range"); | |
1043 | ||
1044 | value_assign (end, high); | |
1045 | } | |
1046 | ||
1047 | result = value_at_lazy (range_type, addr); | |
1048 | return result; | |
1049 | } | |
1050 | ||
1051 | /* A helper function to compute the range and kind given a range | |
1052 | value. TYPE is the type of the range value. RANGE is the range | |
1053 | value. LOW, HIGH, and KIND are out parameters. The LOW and HIGH | |
1054 | parameters might be filled in, or might not be, depending on the | |
1055 | kind of range this is. KIND will always be set to the appropriate | |
1056 | value describing the kind of range, and this can be used to | |
1057 | determine whether LOW or HIGH are valid. */ | |
1058 | ||
1059 | static void | |
1060 | rust_compute_range (struct type *type, struct value *range, | |
1061 | LONGEST *low, LONGEST *high, | |
f2d8e4c5 | 1062 | range_flags *kind) |
c44af4eb TT |
1063 | { |
1064 | int i; | |
1065 | ||
1066 | *low = 0; | |
1067 | *high = 0; | |
2f1b18db | 1068 | *kind = RANGE_LOW_BOUND_DEFAULT | RANGE_HIGH_BOUND_DEFAULT; |
c44af4eb | 1069 | |
1f704f76 | 1070 | if (type->num_fields () == 0) |
c44af4eb TT |
1071 | return; |
1072 | ||
1073 | i = 0; | |
1074 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
1075 | { | |
2f1b18db | 1076 | *kind = RANGE_HIGH_BOUND_DEFAULT; |
c44af4eb TT |
1077 | *low = value_as_long (value_field (range, 0)); |
1078 | ++i; | |
1079 | } | |
1f704f76 | 1080 | if (type->num_fields () > i |
c44af4eb TT |
1081 | && strcmp (TYPE_FIELD_NAME (type, i), "end") == 0) |
1082 | { | |
2f1b18db AB |
1083 | *kind = (*kind == (RANGE_LOW_BOUND_DEFAULT | RANGE_HIGH_BOUND_DEFAULT) |
1084 | ? RANGE_LOW_BOUND_DEFAULT : RANGE_STANDARD); | |
c44af4eb | 1085 | *high = value_as_long (value_field (range, i)); |
6873858b TT |
1086 | |
1087 | if (rust_inclusive_range_type_p (type)) | |
1088 | ++*high; | |
c44af4eb TT |
1089 | } |
1090 | } | |
1091 | ||
1092 | /* A helper for rust_evaluate_subexp that handles BINOP_SUBSCRIPT. */ | |
1093 | ||
6ce1ad67 | 1094 | struct value * |
984af2cb TT |
1095 | rust_subscript (struct type *expect_type, struct expression *exp, |
1096 | enum noside noside, bool for_addr, | |
1097 | struct value *lhs, struct value *rhs) | |
c44af4eb | 1098 | { |
984af2cb | 1099 | struct value *result; |
c44af4eb | 1100 | struct type *rhstype; |
45f4ed92 | 1101 | LONGEST low, high_bound; |
c44af4eb | 1102 | /* Initialized to appease the compiler. */ |
f2d8e4c5 | 1103 | range_flags kind = RANGE_LOW_BOUND_DEFAULT | RANGE_HIGH_BOUND_DEFAULT; |
45f4ed92 | 1104 | LONGEST high = 0; |
c44af4eb TT |
1105 | int want_slice = 0; |
1106 | ||
c44af4eb TT |
1107 | rhstype = check_typedef (value_type (rhs)); |
1108 | if (rust_range_type_p (rhstype)) | |
1109 | { | |
1110 | if (!for_addr) | |
1111 | error (_("Can't take slice of array without '&'")); | |
1112 | rust_compute_range (rhstype, rhs, &low, &high, &kind); | |
1113 | want_slice = 1; | |
1114 | } | |
1115 | else | |
1116 | low = value_as_long (rhs); | |
1117 | ||
b3e3859b | 1118 | struct type *type = check_typedef (value_type (lhs)); |
c44af4eb TT |
1119 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1120 | { | |
b3e3859b | 1121 | struct type *base_type = nullptr; |
78134374 | 1122 | if (type->code () == TYPE_CODE_ARRAY) |
b3e3859b TT |
1123 | base_type = TYPE_TARGET_TYPE (type); |
1124 | else if (rust_slice_type_p (type)) | |
1125 | { | |
1f704f76 | 1126 | for (int i = 0; i < type->num_fields (); ++i) |
b3e3859b TT |
1127 | { |
1128 | if (strcmp (TYPE_FIELD_NAME (type, i), "data_ptr") == 0) | |
1129 | { | |
940da03e | 1130 | base_type = TYPE_TARGET_TYPE (type->field (i).type ()); |
b3e3859b TT |
1131 | break; |
1132 | } | |
1133 | } | |
1134 | if (base_type == nullptr) | |
1135 | error (_("Could not find 'data_ptr' in slice type")); | |
1136 | } | |
78134374 | 1137 | else if (type->code () == TYPE_CODE_PTR) |
b3e3859b TT |
1138 | base_type = TYPE_TARGET_TYPE (type); |
1139 | else | |
1140 | error (_("Cannot subscript non-array type")); | |
1141 | ||
1142 | struct type *new_type; | |
1143 | if (want_slice) | |
1144 | { | |
1145 | if (rust_slice_type_p (type)) | |
1146 | new_type = type; | |
1147 | else | |
1148 | { | |
1149 | struct type *usize | |
1150 | = language_lookup_primitive_type (exp->language_defn, | |
1151 | exp->gdbarch, | |
1152 | "usize"); | |
1153 | new_type = rust_slice_type ("&[*gdb*]", base_type, usize); | |
1154 | } | |
1155 | } | |
1156 | else | |
1157 | new_type = base_type; | |
c44af4eb | 1158 | |
b3e3859b | 1159 | return value_zero (new_type, VALUE_LVAL (lhs)); |
c44af4eb TT |
1160 | } |
1161 | else | |
1162 | { | |
1163 | LONGEST low_bound; | |
1164 | struct value *base; | |
c44af4eb | 1165 | |
78134374 | 1166 | if (type->code () == TYPE_CODE_ARRAY) |
c44af4eb TT |
1167 | { |
1168 | base = lhs; | |
1169 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
1170 | error (_("Can't compute array bounds")); | |
1171 | if (low_bound != 0) | |
1172 | error (_("Found array with non-zero lower bound")); | |
1173 | ++high_bound; | |
1174 | } | |
1175 | else if (rust_slice_type_p (type)) | |
1176 | { | |
1177 | struct value *len; | |
1178 | ||
1179 | base = value_struct_elt (&lhs, NULL, "data_ptr", NULL, "slice"); | |
1180 | len = value_struct_elt (&lhs, NULL, "length", NULL, "slice"); | |
1181 | low_bound = 0; | |
1182 | high_bound = value_as_long (len); | |
1183 | } | |
78134374 | 1184 | else if (type->code () == TYPE_CODE_PTR) |
42d94011 MG |
1185 | { |
1186 | base = lhs; | |
1187 | low_bound = 0; | |
1188 | high_bound = LONGEST_MAX; | |
1189 | } | |
c44af4eb TT |
1190 | else |
1191 | error (_("Cannot subscript non-array type")); | |
1192 | ||
2f1b18db | 1193 | if (want_slice && (kind & RANGE_LOW_BOUND_DEFAULT)) |
c44af4eb TT |
1194 | low = low_bound; |
1195 | if (low < 0) | |
1196 | error (_("Index less than zero")); | |
1197 | if (low > high_bound) | |
1198 | error (_("Index greater than length")); | |
1199 | ||
1200 | result = value_subscript (base, low); | |
1201 | } | |
1202 | ||
1203 | if (for_addr) | |
1204 | { | |
1205 | if (want_slice) | |
1206 | { | |
1207 | struct type *usize, *slice; | |
1208 | CORE_ADDR addr; | |
1209 | struct value *addrval, *tem; | |
1210 | ||
2f1b18db | 1211 | if (kind & RANGE_HIGH_BOUND_DEFAULT) |
c44af4eb TT |
1212 | high = high_bound; |
1213 | if (high < 0) | |
1214 | error (_("High index less than zero")); | |
1215 | if (low > high) | |
1216 | error (_("Low index greater than high index")); | |
1217 | if (high > high_bound) | |
1218 | error (_("High index greater than length")); | |
1219 | ||
1220 | usize = language_lookup_primitive_type (exp->language_defn, | |
1221 | exp->gdbarch, | |
1222 | "usize"); | |
45320ffa TT |
1223 | const char *new_name = ((type != nullptr |
1224 | && rust_slice_type_p (type)) | |
7d93a1e0 | 1225 | ? type->name () : "&[*gdb*]"); |
45320ffa TT |
1226 | |
1227 | slice = rust_slice_type (new_name, value_type (result), usize); | |
c44af4eb TT |
1228 | |
1229 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (slice)); | |
1230 | addr = value_as_long (addrval); | |
1231 | tem = value_at_lazy (slice, addr); | |
1232 | ||
1233 | value_assign (value_field (tem, 0), value_addr (result)); | |
1234 | value_assign (value_field (tem, 1), | |
1235 | value_from_longest (usize, high - low)); | |
1236 | ||
1237 | result = value_at_lazy (slice, addr); | |
1238 | } | |
1239 | else | |
1240 | result = value_addr (result); | |
1241 | } | |
1242 | ||
1243 | return result; | |
1244 | } | |
1245 | ||
d123f9e4 TT |
1246 | /* A helper function for UNOP_IND. */ |
1247 | ||
11dd3dce | 1248 | struct value * |
d123f9e4 TT |
1249 | eval_op_rust_ind (struct type *expect_type, struct expression *exp, |
1250 | enum noside noside, | |
11dd3dce | 1251 | enum exp_opcode opcode, |
d123f9e4 TT |
1252 | struct value *value) |
1253 | { | |
1254 | gdb_assert (noside == EVAL_NORMAL); | |
1255 | struct value *trait_ptr = rust_get_trait_object_pointer (value); | |
1256 | if (trait_ptr != NULL) | |
1257 | value = trait_ptr; | |
1258 | ||
1259 | return value_ind (value); | |
1260 | } | |
1261 | ||
6fa9831f TT |
1262 | /* A helper function for UNOP_COMPLEMENT. */ |
1263 | ||
6fab4359 | 1264 | struct value * |
6fa9831f TT |
1265 | eval_op_rust_complement (struct type *expect_type, struct expression *exp, |
1266 | enum noside noside, | |
6fab4359 | 1267 | enum exp_opcode opcode, |
6fa9831f TT |
1268 | struct value *value) |
1269 | { | |
6fa9831f TT |
1270 | if (value_type (value)->code () == TYPE_CODE_BOOL) |
1271 | return value_from_longest (value_type (value), value_logical_not (value)); | |
1272 | return value_complement (value); | |
1273 | } | |
1274 | ||
05104233 TT |
1275 | /* A helper function for OP_ARRAY. */ |
1276 | ||
6fab4359 | 1277 | struct value * |
05104233 TT |
1278 | eval_op_rust_array (struct type *expect_type, struct expression *exp, |
1279 | enum noside noside, | |
6fab4359 | 1280 | enum exp_opcode opcode, |
05104233 TT |
1281 | struct value *elt, struct value *ncopies) |
1282 | { | |
1283 | int copies = value_as_long (ncopies); | |
1284 | if (copies < 0) | |
1285 | error (_("Array with negative number of elements")); | |
1286 | ||
1287 | if (noside == EVAL_NORMAL) | |
1288 | { | |
1289 | int i; | |
1290 | std::vector<struct value *> eltvec (copies); | |
1291 | ||
1292 | for (i = 0; i < copies; ++i) | |
1293 | eltvec[i] = elt; | |
1294 | return value_array (0, copies - 1, eltvec.data ()); | |
1295 | } | |
1296 | else | |
1297 | { | |
1298 | struct type *arraytype | |
1299 | = lookup_array_range_type (value_type (elt), 0, copies - 1); | |
1300 | return allocate_value (arraytype); | |
1301 | } | |
1302 | } | |
1303 | ||
575cae23 TT |
1304 | /* A helper function for STRUCTOP_ANONYMOUS. */ |
1305 | ||
e4407a20 | 1306 | struct value * |
575cae23 TT |
1307 | eval_op_rust_struct_anon (struct type *expect_type, struct expression *exp, |
1308 | enum noside noside, | |
1309 | int field_number, struct value *lhs) | |
1310 | { | |
1311 | struct type *type = value_type (lhs); | |
1312 | ||
1313 | if (type->code () == TYPE_CODE_STRUCT) | |
1314 | { | |
1315 | struct type *outer_type = NULL; | |
1316 | ||
1317 | if (rust_enum_p (type)) | |
1318 | { | |
1319 | gdb::array_view<const gdb_byte> view (value_contents (lhs), | |
1320 | TYPE_LENGTH (type)); | |
1321 | type = resolve_dynamic_type (type, view, value_address (lhs)); | |
1322 | ||
1323 | if (rust_empty_enum_p (type)) | |
1324 | error (_("Cannot access field %d of empty enum %s"), | |
1325 | field_number, type->name ()); | |
1326 | ||
1327 | int fieldno = rust_enum_variant (type); | |
1328 | lhs = value_primitive_field (lhs, 0, fieldno, type); | |
1329 | outer_type = type; | |
1330 | type = value_type (lhs); | |
1331 | } | |
1332 | ||
1333 | /* Tuples and tuple structs */ | |
1334 | int nfields = type->num_fields (); | |
1335 | ||
1336 | if (field_number >= nfields || field_number < 0) | |
1337 | { | |
1338 | if (outer_type != NULL) | |
1339 | error(_("Cannot access field %d of variant %s::%s, " | |
1340 | "there are only %d fields"), | |
1341 | field_number, outer_type->name (), | |
1342 | rust_last_path_segment (type->name ()), | |
1343 | nfields); | |
1344 | else | |
1345 | error(_("Cannot access field %d of %s, " | |
1346 | "there are only %d fields"), | |
1347 | field_number, type->name (), nfields); | |
1348 | } | |
1349 | ||
1350 | /* Tuples are tuple structs too. */ | |
1351 | if (!rust_tuple_struct_type_p (type)) | |
1352 | { | |
1353 | if (outer_type != NULL) | |
1354 | error(_("Variant %s::%s is not a tuple variant"), | |
1355 | outer_type->name (), | |
1356 | rust_last_path_segment (type->name ())); | |
1357 | else | |
1358 | error(_("Attempting to access anonymous field %d " | |
1359 | "of %s, which is not a tuple, tuple struct, or " | |
1360 | "tuple-like variant"), | |
1361 | field_number, type->name ()); | |
1362 | } | |
1363 | ||
1364 | return value_primitive_field (lhs, 0, field_number, type); | |
1365 | } | |
1366 | else | |
1367 | error(_("Anonymous field access is only allowed on tuples, \ | |
1368 | tuple structs, and tuple-like enum variants")); | |
1369 | } | |
1370 | ||
1fa41fc7 TT |
1371 | /* A helper function for STRUCTOP_STRUCT. */ |
1372 | ||
e4407a20 | 1373 | struct value * |
1fa41fc7 TT |
1374 | eval_op_rust_structop (struct type *expect_type, struct expression *exp, |
1375 | enum noside noside, | |
1376 | struct value *lhs, const char *field_name) | |
1377 | { | |
1378 | struct value *result; | |
1379 | struct type *type = value_type (lhs); | |
1380 | if (type->code () == TYPE_CODE_STRUCT && rust_enum_p (type)) | |
1381 | { | |
1382 | gdb::array_view<const gdb_byte> view (value_contents (lhs), | |
1383 | TYPE_LENGTH (type)); | |
1384 | type = resolve_dynamic_type (type, view, value_address (lhs)); | |
1385 | ||
1386 | if (rust_empty_enum_p (type)) | |
1387 | error (_("Cannot access field %s of empty enum %s"), | |
1388 | field_name, type->name ()); | |
1389 | ||
1390 | int fieldno = rust_enum_variant (type); | |
1391 | lhs = value_primitive_field (lhs, 0, fieldno, type); | |
1392 | ||
1393 | struct type *outer_type = type; | |
1394 | type = value_type (lhs); | |
1395 | if (rust_tuple_type_p (type) || rust_tuple_struct_type_p (type)) | |
1396 | error (_("Attempting to access named field %s of tuple " | |
1397 | "variant %s::%s, which has only anonymous fields"), | |
1398 | field_name, outer_type->name (), | |
1399 | rust_last_path_segment (type->name ())); | |
1400 | ||
1401 | try | |
1402 | { | |
1403 | result = value_struct_elt (&lhs, NULL, field_name, | |
1404 | NULL, "structure"); | |
1405 | } | |
1406 | catch (const gdb_exception_error &except) | |
1407 | { | |
1408 | error (_("Could not find field %s of struct variant %s::%s"), | |
1409 | field_name, outer_type->name (), | |
1410 | rust_last_path_segment (type->name ())); | |
1411 | } | |
1412 | } | |
1413 | else | |
1414 | result = value_struct_elt (&lhs, NULL, field_name, NULL, "structure"); | |
1415 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1416 | result = value_zero (value_type (result), VALUE_LVAL (result)); | |
1417 | return result; | |
1418 | } | |
1419 | ||
5947d337 TT |
1420 | namespace expr |
1421 | { | |
1422 | ||
1423 | value * | |
1424 | rust_aggregate_operation::evaluate (struct type *expect_type, | |
1425 | struct expression *exp, | |
1426 | enum noside noside) | |
1427 | { | |
1428 | struct type *type = std::get<0> (m_storage); | |
1429 | CORE_ADDR addr = 0; | |
1430 | struct value *addrval = NULL; | |
1431 | value *result; | |
1432 | ||
1433 | if (noside == EVAL_NORMAL) | |
1434 | { | |
1435 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (type)); | |
1436 | addr = value_as_long (addrval); | |
1437 | result = value_at_lazy (type, addr); | |
1438 | } | |
1439 | ||
1440 | if (std::get<1> (m_storage) != nullptr) | |
1441 | { | |
1442 | struct value *init = std::get<1> (m_storage)->evaluate (nullptr, exp, | |
1443 | noside); | |
1444 | ||
1445 | if (noside == EVAL_NORMAL) | |
1446 | { | |
1447 | /* This isn't quite right but will do for the time | |
1448 | being, seeing that we can't implement the Copy | |
1449 | trait anyway. */ | |
1450 | value_assign (result, init); | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | for (const auto &item : std::get<2> (m_storage)) | |
1455 | { | |
1456 | value *val = item.second->evaluate (nullptr, exp, noside); | |
1457 | if (noside == EVAL_NORMAL) | |
1458 | { | |
1459 | const char *fieldname = item.first.c_str (); | |
1460 | value *field = value_struct_elt (&result, nullptr, fieldname, | |
1461 | nullptr, "structure"); | |
1462 | value_assign (field, val); | |
1463 | } | |
1464 | } | |
1465 | ||
aa1da9ed | 1466 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
5947d337 TT |
1467 | result = allocate_value (type); |
1468 | else | |
1469 | result = value_at_lazy (type, addr); | |
1470 | ||
1471 | return result; | |
1472 | } | |
1473 | ||
638fd74a TT |
1474 | value * |
1475 | rust_structop::evaluate_funcall (struct type *expect_type, | |
1476 | struct expression *exp, | |
1477 | enum noside noside, | |
1478 | const std::vector<operation_up> &ops) | |
1479 | { | |
1480 | std::vector<struct value *> args (ops.size () + 1); | |
1481 | ||
1482 | /* Evaluate the argument to STRUCTOP_STRUCT, then find its | |
1483 | type in order to look up the method. */ | |
1484 | args[0] = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
1485 | /* We don't yet implement real Deref semantics. */ | |
1486 | while (value_type (args[0])->code () == TYPE_CODE_PTR) | |
1487 | args[0] = value_ind (args[0]); | |
1488 | ||
1489 | struct type *type = value_type (args[0]); | |
1490 | if ((type->code () != TYPE_CODE_STRUCT | |
1491 | && type->code () != TYPE_CODE_UNION | |
1492 | && type->code () != TYPE_CODE_ENUM) | |
1493 | || rust_tuple_type_p (type)) | |
1494 | error (_("Method calls only supported on struct or enum types")); | |
1495 | if (type->name () == NULL) | |
1496 | error (_("Method call on nameless type")); | |
1497 | ||
1498 | std::string name = (std::string (type->name ()) + "::" | |
1499 | + std::get<1> (m_storage)); | |
1500 | ||
1501 | const struct block *block = get_selected_block (0); | |
1502 | struct block_symbol sym = lookup_symbol (name.c_str (), block, | |
1503 | VAR_DOMAIN, NULL); | |
1504 | if (sym.symbol == NULL) | |
1505 | error (_("Could not find function named '%s'"), name.c_str ()); | |
1506 | ||
1507 | struct type *fn_type = SYMBOL_TYPE (sym.symbol); | |
1508 | if (fn_type->num_fields () == 0) | |
1509 | error (_("Function '%s' takes no arguments"), name.c_str ()); | |
1510 | ||
1511 | if (fn_type->field (0).type ()->code () == TYPE_CODE_PTR) | |
1512 | args[0] = value_addr (args[0]); | |
1513 | ||
1514 | value *function = address_of_variable (sym.symbol, block); | |
1515 | ||
1516 | for (int i = 0; i < ops.size (); ++i) | |
1517 | args[i + 1] = ops[i]->evaluate (nullptr, exp, noside); | |
1518 | ||
1519 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1520 | return value_zero (TYPE_TARGET_TYPE (fn_type), not_lval); | |
1521 | return call_function_by_hand (function, NULL, args); | |
1522 | } | |
1523 | ||
5947d337 TT |
1524 | } |
1525 | ||
c44af4eb TT |
1526 | \f |
1527 | ||
1c485265 | 1528 | /* See language.h. */ |
0874fd07 | 1529 | |
1c485265 AB |
1530 | void |
1531 | rust_language::language_arch_info (struct gdbarch *gdbarch, | |
1532 | struct language_arch_info *lai) const | |
0874fd07 | 1533 | { |
1c485265 | 1534 | const struct builtin_type *builtin = builtin_type (gdbarch); |
87afa652 | 1535 | |
1c485265 AB |
1536 | /* Helper function to allow shorter lines below. */ |
1537 | auto add = [&] (struct type * t) -> struct type * | |
87afa652 | 1538 | { |
1c485265 AB |
1539 | lai->add_primitive_type (t); |
1540 | return t; | |
1541 | }; | |
1542 | ||
1543 | struct type *bool_type | |
1544 | = add (arch_boolean_type (gdbarch, 8, 1, "bool")); | |
1545 | add (arch_character_type (gdbarch, 32, 1, "char")); | |
1546 | add (arch_integer_type (gdbarch, 8, 0, "i8")); | |
1547 | struct type *u8_type | |
1548 | = add (arch_integer_type (gdbarch, 8, 1, "u8")); | |
1549 | add (arch_integer_type (gdbarch, 16, 0, "i16")); | |
1550 | add (arch_integer_type (gdbarch, 16, 1, "u16")); | |
1551 | add (arch_integer_type (gdbarch, 32, 0, "i32")); | |
1552 | add (arch_integer_type (gdbarch, 32, 1, "u32")); | |
1553 | add (arch_integer_type (gdbarch, 64, 0, "i64")); | |
1554 | add (arch_integer_type (gdbarch, 64, 1, "u64")); | |
1555 | ||
1556 | unsigned int length = 8 * TYPE_LENGTH (builtin->builtin_data_ptr); | |
1557 | add (arch_integer_type (gdbarch, length, 0, "isize")); | |
1558 | struct type *usize_type | |
1559 | = add (arch_integer_type (gdbarch, length, 1, "usize")); | |
1560 | ||
1561 | add (arch_float_type (gdbarch, 32, "f32", floatformats_ieee_single)); | |
1562 | add (arch_float_type (gdbarch, 64, "f64", floatformats_ieee_double)); | |
1563 | add (arch_integer_type (gdbarch, 0, 1, "()")); | |
1564 | ||
1565 | struct type *tem = make_cv_type (1, 0, u8_type, NULL); | |
1566 | add (rust_slice_type ("&str", tem, usize_type)); | |
1567 | ||
1568 | lai->set_bool_type (bool_type); | |
1569 | lai->set_string_char_type (u8_type); | |
1570 | } | |
39e7ecca | 1571 | |
1c485265 | 1572 | /* See language.h. */ |
efdf6a73 | 1573 | |
1c485265 AB |
1574 | void |
1575 | rust_language::print_type (struct type *type, const char *varstring, | |
1576 | struct ui_file *stream, int show, int level, | |
1577 | const struct type_print_options *flags) const | |
1578 | { | |
fbb46296 | 1579 | print_offset_data podata (flags); |
1c485265 AB |
1580 | rust_internal_print_type (type, varstring, stream, show, level, |
1581 | flags, false, &podata); | |
1582 | } | |
efdf6a73 | 1583 | |
1c485265 | 1584 | /* See language.h. */ |
5aba6ebe | 1585 | |
1c485265 AB |
1586 | void |
1587 | rust_language::emitchar (int ch, struct type *chtype, | |
1588 | struct ui_file *stream, int quoter) const | |
1589 | { | |
1590 | if (!rust_chartype_p (chtype)) | |
1591 | generic_emit_char (ch, chtype, stream, quoter, | |
8ee511af | 1592 | target_charset (chtype->arch ())); |
1c485265 AB |
1593 | else if (ch == '\\' || ch == quoter) |
1594 | fprintf_filtered (stream, "\\%c", ch); | |
1595 | else if (ch == '\n') | |
1596 | fputs_filtered ("\\n", stream); | |
1597 | else if (ch == '\r') | |
1598 | fputs_filtered ("\\r", stream); | |
1599 | else if (ch == '\t') | |
1600 | fputs_filtered ("\\t", stream); | |
1601 | else if (ch == '\0') | |
1602 | fputs_filtered ("\\0", stream); | |
1603 | else if (ch >= 32 && ch <= 127 && isprint (ch)) | |
1604 | fputc_filtered (ch, stream); | |
1605 | else if (ch <= 255) | |
1606 | fprintf_filtered (stream, "\\x%02x", ch); | |
1607 | else | |
1608 | fprintf_filtered (stream, "\\u{%06x}", ch); | |
1609 | } | |
5aba6ebe | 1610 | |
1c485265 | 1611 | /* See language.h. */ |
b7c6e27d | 1612 | |
1c485265 AB |
1613 | bool |
1614 | rust_language::is_string_type_p (struct type *type) const | |
1615 | { | |
1616 | LONGEST low_bound, high_bound; | |
b7c6e27d | 1617 | |
1c485265 AB |
1618 | type = check_typedef (type); |
1619 | return ((type->code () == TYPE_CODE_STRING) | |
1620 | || (type->code () == TYPE_CODE_PTR | |
1621 | && (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ARRAY | |
1622 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) | |
1623 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
1624 | &high_bound))) | |
1625 | || (type->code () == TYPE_CODE_STRUCT | |
1626 | && !rust_enum_p (type) | |
1627 | && rust_slice_type_p (type) | |
1628 | && strcmp (type->name (), "&str") == 0)); | |
1629 | } | |
0874fd07 AB |
1630 | |
1631 | /* Single instance of the Rust language class. */ | |
1632 | ||
1633 | static rust_language rust_language_defn; |