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1 | // Copyright (C) 2020-2022 Free Software Foundation, Inc. |
2 | ||
3 | // This file is part of GCC. | |
4 | ||
5 | // GCC is free software; you can redistribute it and/or modify it under | |
6 | // the terms of the GNU General Public License as published by the Free | |
7 | // Software Foundation; either version 3, or (at your option) any later | |
8 | // version. | |
9 | ||
10 | // GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
11 | // WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | // for more details. | |
14 | ||
15 | // You should have received a copy of the GNU General Public License | |
16 | // along with GCC; see the file COPYING3. If not see | |
17 | // <http://www.gnu.org/licenses/>. | |
18 | ||
19 | #ifndef RUST_AST_LOWER_TYPE | |
20 | #define RUST_AST_LOWER_TYPE | |
21 | ||
22 | #include "rust-ast-lower-base.h" | |
23 | #include "rust-diagnostics.h" | |
24 | #include "rust-ast-lower-expr.h" | |
25 | ||
26 | namespace Rust { | |
27 | namespace HIR { | |
28 | ||
29 | class ASTLowerTypePath : public ASTLoweringBase | |
30 | { | |
31 | protected: | |
32 | using Rust::HIR::ASTLoweringBase::visit; | |
33 | ||
34 | public: | |
35 | static HIR::TypePath *translate (AST::TypePath &type) | |
36 | { | |
37 | ASTLowerTypePath resolver; | |
38 | type.accept_vis (resolver); | |
39 | rust_assert (resolver.translated != nullptr); | |
40 | return resolver.translated; | |
41 | } | |
42 | ||
43 | void visit (AST::TypePathSegmentFunction &) override { gcc_unreachable (); } | |
44 | ||
45 | void visit (AST::TypePathSegment &segment) override | |
46 | { | |
47 | auto crate_num = mappings->get_current_crate (); | |
48 | auto hirid = mappings->get_next_hir_id (crate_num); | |
49 | Analysis::NodeMapping mapping (crate_num, segment.get_node_id (), hirid, | |
50 | UNKNOWN_LOCAL_DEFID); | |
51 | ||
52 | HIR::PathIdentSegment ident (segment.get_ident_segment ().as_string ()); | |
53 | translated_segment | |
54 | = new HIR::TypePathSegment (std::move (mapping), ident, | |
55 | segment.get_separating_scope_resolution (), | |
56 | segment.get_locus ()); | |
57 | } | |
58 | ||
59 | void visit (AST::TypePathSegmentGeneric &segment) override; | |
60 | ||
61 | void visit (AST::TypePath &path) override | |
62 | { | |
63 | std::vector<std::unique_ptr<HIR::TypePathSegment>> translated_segments; | |
64 | ||
65 | for (auto &seg : path.get_segments ()) | |
66 | { | |
67 | translated_segment = nullptr; | |
68 | seg->accept_vis (*this); | |
69 | if (translated_segment == nullptr) | |
70 | { | |
71 | rust_fatal_error (seg->get_locus (), | |
72 | "failed to translate AST TypePathSegment"); | |
73 | } | |
74 | translated_segments.push_back ( | |
75 | std::unique_ptr<HIR::TypePathSegment> (translated_segment)); | |
76 | } | |
77 | ||
78 | auto crate_num = mappings->get_current_crate (); | |
79 | auto hirid = mappings->get_next_hir_id (crate_num); | |
80 | Analysis::NodeMapping mapping (crate_num, path.get_node_id (), hirid, | |
81 | mappings->get_next_localdef_id (crate_num)); | |
82 | ||
83 | translated | |
84 | = new HIR::TypePath (std::move (mapping), std::move (translated_segments), | |
85 | path.get_locus (), | |
86 | path.has_opening_scope_resolution_op ()); | |
87 | } | |
88 | ||
89 | protected: | |
90 | HIR::TypePathSegment *translated_segment; | |
91 | ||
92 | private: | |
93 | HIR::TypePath *translated; | |
94 | }; | |
95 | ||
96 | class ASTLowerQualifiedPathInType : public ASTLowerTypePath | |
97 | { | |
98 | using ASTLowerTypePath::visit; | |
99 | ||
100 | public: | |
101 | static HIR::QualifiedPathInType *translate (AST::QualifiedPathInType &type) | |
102 | { | |
103 | ASTLowerQualifiedPathInType resolver; | |
104 | type.accept_vis (resolver); | |
105 | rust_assert (resolver.translated != nullptr); | |
106 | return resolver.translated; | |
107 | } | |
108 | ||
109 | void visit (AST::QualifiedPathInType &path) override; | |
110 | ||
111 | private: | |
112 | HIR::QualifiedPathInType *translated; | |
113 | }; | |
114 | ||
115 | class ASTLoweringType : public ASTLoweringBase | |
116 | { | |
117 | using Rust::HIR::ASTLoweringBase::visit; | |
118 | ||
119 | public: | |
120 | static HIR::Type *translate (AST::Type *type) | |
121 | { | |
122 | ASTLoweringType resolver; | |
123 | type->accept_vis (resolver); | |
124 | ||
125 | rust_assert (resolver.translated != nullptr); | |
126 | resolver.mappings->insert_hir_type (resolver.translated); | |
127 | resolver.mappings->insert_location ( | |
128 | resolver.translated->get_mappings ().get_hirid (), | |
129 | resolver.translated->get_locus ()); | |
130 | ||
131 | return resolver.translated; | |
132 | } | |
133 | ||
134 | void visit (AST::BareFunctionType &fntype) override | |
135 | { | |
136 | bool is_variadic = false; | |
137 | std::vector<HIR::LifetimeParam> lifetime_params; | |
138 | HIR::FunctionQualifiers qualifiers | |
139 | = lower_qualifiers (fntype.get_function_qualifiers ()); | |
140 | ||
141 | std::vector<HIR::MaybeNamedParam> named_params; | |
142 | for (auto ¶m : fntype.get_function_params ()) | |
143 | { | |
144 | HIR::MaybeNamedParam::ParamKind kind; | |
145 | switch (param.get_param_kind ()) | |
146 | { | |
147 | case AST::MaybeNamedParam::ParamKind::UNNAMED: | |
148 | kind = HIR::MaybeNamedParam::ParamKind::UNNAMED; | |
149 | break; | |
150 | case AST::MaybeNamedParam::ParamKind::IDENTIFIER: | |
151 | kind = HIR::MaybeNamedParam::ParamKind::IDENTIFIER; | |
152 | break; | |
153 | case AST::MaybeNamedParam::ParamKind::WILDCARD: | |
154 | kind = HIR::MaybeNamedParam::ParamKind::WILDCARD; | |
155 | break; | |
156 | default: | |
157 | gcc_unreachable (); | |
158 | } | |
159 | ||
160 | HIR::Type *param_type | |
161 | = ASTLoweringType::translate (param.get_type ().get ()); | |
162 | ||
163 | HIR::MaybeNamedParam p (param.get_name (), kind, | |
164 | std::unique_ptr<HIR::Type> (param_type), | |
165 | param.get_locus ()); | |
166 | named_params.push_back (std::move (p)); | |
167 | } | |
168 | ||
169 | HIR::Type *return_type = nullptr; | |
170 | if (fntype.has_return_type ()) | |
171 | { | |
172 | return_type | |
173 | = ASTLoweringType::translate (fntype.get_return_type ().get ()); | |
174 | } | |
175 | ||
176 | auto crate_num = mappings->get_current_crate (); | |
177 | Analysis::NodeMapping mapping (crate_num, fntype.get_node_id (), | |
178 | mappings->get_next_hir_id (crate_num), | |
179 | mappings->get_next_localdef_id (crate_num)); | |
180 | ||
181 | translated = new HIR::BareFunctionType ( | |
182 | std::move (mapping), std::move (lifetime_params), std::move (qualifiers), | |
183 | std::move (named_params), is_variadic, | |
184 | std::unique_ptr<HIR::Type> (return_type), fntype.get_locus ()); | |
185 | } | |
186 | ||
187 | void visit (AST::TupleType &tuple) override | |
188 | { | |
189 | std::vector<std::unique_ptr<HIR::Type>> elems; | |
190 | for (auto &e : tuple.get_elems ()) | |
191 | { | |
192 | HIR::Type *t = ASTLoweringType::translate (e.get ()); | |
193 | elems.push_back (std::unique_ptr<HIR::Type> (t)); | |
194 | } | |
195 | ||
196 | auto crate_num = mappings->get_current_crate (); | |
197 | Analysis::NodeMapping mapping (crate_num, tuple.get_node_id (), | |
198 | mappings->get_next_hir_id (crate_num), | |
199 | mappings->get_next_localdef_id (crate_num)); | |
200 | ||
201 | translated = new HIR::TupleType (std::move (mapping), std::move (elems), | |
202 | tuple.get_locus ()); | |
203 | } | |
204 | ||
205 | void visit (AST::TypePath &path) override | |
206 | { | |
207 | translated = ASTLowerTypePath::translate (path); | |
208 | } | |
209 | ||
210 | void visit (AST::QualifiedPathInType &path) override | |
211 | { | |
212 | translated = ASTLowerQualifiedPathInType::translate (path); | |
213 | } | |
214 | ||
215 | void visit (AST::ArrayType &type) override | |
216 | { | |
217 | HIR::Type *translated_type | |
218 | = ASTLoweringType::translate (type.get_elem_type ().get ()); | |
219 | HIR::Expr *array_size | |
220 | = ASTLoweringExpr::translate (type.get_size_expr ().get ()); | |
221 | ||
222 | auto crate_num = mappings->get_current_crate (); | |
223 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
224 | mappings->get_next_hir_id (crate_num), | |
225 | mappings->get_next_localdef_id (crate_num)); | |
226 | ||
227 | translated | |
228 | = new HIR::ArrayType (mapping, | |
229 | std::unique_ptr<HIR::Type> (translated_type), | |
230 | std::unique_ptr<HIR::Expr> (array_size), | |
231 | type.get_locus ()); | |
232 | } | |
233 | ||
234 | void visit (AST::ReferenceType &type) override | |
235 | { | |
236 | HIR::Lifetime lifetime = lower_lifetime (type.get_lifetime ()); | |
237 | ||
238 | HIR::Type *base_type | |
239 | = ASTLoweringType::translate (type.get_base_type ().get ()); | |
240 | ||
241 | auto crate_num = mappings->get_current_crate (); | |
242 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
243 | mappings->get_next_hir_id (crate_num), | |
244 | mappings->get_next_localdef_id (crate_num)); | |
245 | ||
246 | translated = new HIR::ReferenceType (mapping, | |
247 | type.get_has_mut () ? Mutability::Mut | |
248 | : Mutability::Imm, | |
249 | std::unique_ptr<HIR::Type> (base_type), | |
250 | type.get_locus (), lifetime); | |
251 | } | |
252 | ||
253 | void visit (AST::RawPointerType &type) override | |
254 | { | |
255 | HIR::Type *base_type | |
256 | = ASTLoweringType::translate (type.get_type_pointed_to ().get ()); | |
257 | ||
258 | auto crate_num = mappings->get_current_crate (); | |
259 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
260 | mappings->get_next_hir_id (crate_num), | |
261 | mappings->get_next_localdef_id (crate_num)); | |
262 | ||
263 | translated | |
264 | = new HIR::RawPointerType (mapping, | |
265 | type.get_pointer_type () | |
266 | == AST::RawPointerType::PointerType::MUT | |
267 | ? Mutability::Mut | |
268 | : Mutability::Imm, | |
269 | std::unique_ptr<HIR::Type> (base_type), | |
270 | type.get_locus ()); | |
271 | } | |
272 | ||
273 | void visit (AST::SliceType &type) override | |
274 | { | |
275 | HIR::Type *base_type | |
276 | = ASTLoweringType::translate (type.get_elem_type ().get ()); | |
277 | ||
278 | auto crate_num = mappings->get_current_crate (); | |
279 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
280 | mappings->get_next_hir_id (crate_num), | |
281 | mappings->get_next_localdef_id (crate_num)); | |
282 | ||
283 | translated | |
284 | = new HIR::SliceType (mapping, std::unique_ptr<HIR::Type> (base_type), | |
285 | type.get_locus ()); | |
286 | } | |
287 | ||
288 | void visit (AST::InferredType &type) override | |
289 | { | |
290 | auto crate_num = mappings->get_current_crate (); | |
291 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
292 | mappings->get_next_hir_id (crate_num), | |
293 | mappings->get_next_localdef_id (crate_num)); | |
294 | ||
295 | translated = new HIR::InferredType (mapping, type.get_locus ()); | |
296 | } | |
297 | ||
298 | void visit (AST::NeverType &type) override | |
299 | { | |
300 | auto crate_num = mappings->get_current_crate (); | |
301 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
302 | mappings->get_next_hir_id (crate_num), | |
303 | mappings->get_next_localdef_id (crate_num)); | |
304 | ||
305 | translated = new HIR::NeverType (mapping, type.get_locus ()); | |
306 | } | |
307 | ||
308 | void visit (AST::TraitObjectTypeOneBound &type) override; | |
309 | ||
310 | void visit (AST::TraitObjectType &type) override; | |
311 | ||
312 | private: | |
313 | ASTLoweringType () : ASTLoweringBase (), translated (nullptr) {} | |
314 | ||
315 | HIR::Type *translated; | |
316 | }; | |
317 | ||
318 | class ASTLowerGenericParam : public ASTLoweringBase | |
319 | { | |
320 | using Rust::HIR::ASTLoweringBase::visit; | |
321 | ||
322 | public: | |
323 | static HIR::GenericParam *translate (AST::GenericParam *param) | |
324 | { | |
325 | ASTLowerGenericParam resolver; | |
326 | param->accept_vis (resolver); | |
327 | ||
328 | rust_assert (resolver.translated != nullptr); | |
329 | resolver.mappings->insert_location ( | |
330 | resolver.translated->get_mappings ().get_hirid (), param->get_locus ()); | |
331 | resolver.mappings->insert_hir_generic_param (resolver.translated); | |
332 | ||
333 | return resolver.translated; | |
334 | } | |
335 | ||
336 | void visit (AST::LifetimeParam ¶m) override | |
337 | { | |
338 | auto crate_num = mappings->get_current_crate (); | |
339 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
340 | mappings->get_next_hir_id (crate_num), | |
341 | mappings->get_next_localdef_id (crate_num)); | |
342 | ||
343 | HIR::Lifetime lt (mapping, param.get_lifetime ().get_lifetime_type (), | |
344 | param.get_lifetime ().get_lifetime_name (), | |
345 | param.get_lifetime ().get_locus ()); | |
346 | ||
347 | translated = new HIR::LifetimeParam (mapping, lt, param.get_locus (), | |
348 | std::vector<Lifetime> ()); | |
349 | } | |
350 | ||
351 | void visit (AST::ConstGenericParam ¶m) override | |
352 | { | |
353 | auto crate_num = mappings->get_current_crate (); | |
354 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
355 | mappings->get_next_hir_id (crate_num), | |
356 | mappings->get_next_localdef_id (crate_num)); | |
357 | ||
358 | auto type = ASTLoweringType::translate (param.get_type ().get ()); | |
359 | ||
360 | HIR::Expr *default_expr = nullptr; | |
361 | if (param.has_default_value ()) | |
362 | default_expr = ASTLoweringExpr::translate ( | |
363 | param.get_default_value ().get_expression ().get ()); | |
364 | ||
365 | translated | |
366 | = new HIR::ConstGenericParam (param.get_name (), | |
367 | std::unique_ptr<Type> (type), | |
368 | std::unique_ptr<Expr> (default_expr), | |
369 | mapping, param.get_locus ()); | |
370 | } | |
371 | ||
372 | void visit (AST::TypeParam ¶m) override | |
373 | { | |
374 | AST::Attribute outer_attr = AST::Attribute::create_empty (); | |
375 | std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds; | |
376 | if (param.has_type_param_bounds ()) | |
377 | { | |
378 | for (auto &bound : param.get_type_param_bounds ()) | |
379 | { | |
380 | HIR::TypeParamBound *lowered_bound = lower_bound (bound.get ()); | |
381 | type_param_bounds.push_back ( | |
382 | std::unique_ptr<HIR::TypeParamBound> (lowered_bound)); | |
383 | } | |
384 | } | |
385 | ||
386 | HIR::Type *type = param.has_type () | |
387 | ? ASTLoweringType::translate (param.get_type ().get ()) | |
388 | : nullptr; | |
389 | ||
390 | auto crate_num = mappings->get_current_crate (); | |
391 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
392 | mappings->get_next_hir_id (crate_num), | |
393 | mappings->get_next_localdef_id (crate_num)); | |
394 | ||
395 | translated | |
396 | = new HIR::TypeParam (mapping, param.get_type_representation (), | |
397 | param.get_locus (), std::move (type_param_bounds), | |
398 | std::unique_ptr<Type> (type), | |
399 | std::move (outer_attr)); | |
400 | } | |
401 | ||
402 | private: | |
403 | ASTLowerGenericParam () : ASTLoweringBase (), translated (nullptr) {} | |
404 | ||
405 | HIR::GenericParam *translated; | |
406 | }; | |
407 | ||
408 | class ASTLoweringTypeBounds : public ASTLoweringBase | |
409 | { | |
410 | using Rust::HIR::ASTLoweringBase::visit; | |
411 | ||
412 | public: | |
413 | static HIR::TypeParamBound *translate (AST::TypeParamBound *type) | |
414 | { | |
415 | ASTLoweringTypeBounds resolver; | |
416 | type->accept_vis (resolver); | |
417 | ||
418 | rust_assert (resolver.translated != nullptr); | |
419 | resolver.mappings->insert_location ( | |
420 | resolver.translated->get_mappings ().get_hirid (), | |
421 | resolver.translated->get_locus ()); | |
422 | ||
423 | return resolver.translated; | |
424 | } | |
425 | ||
426 | void visit (AST::TraitBound &bound) override | |
427 | { | |
428 | // FIXME | |
429 | std::vector<HIR::LifetimeParam> lifetimes; | |
430 | ||
431 | AST::TypePath &ast_trait_path = bound.get_type_path (); | |
432 | HIR::TypePath *trait_path = ASTLowerTypePath::translate (ast_trait_path); | |
433 | ||
434 | auto crate_num = mappings->get_current_crate (); | |
435 | Analysis::NodeMapping mapping (crate_num, bound.get_node_id (), | |
436 | mappings->get_next_hir_id (crate_num), | |
437 | UNKNOWN_LOCAL_DEFID); | |
438 | ||
439 | translated = new HIR::TraitBound (mapping, *trait_path, bound.get_locus (), | |
440 | bound.is_in_parens (), | |
441 | bound.has_opening_question_mark ()); | |
442 | } | |
443 | ||
444 | void visit (AST::Lifetime &bound) override | |
445 | { | |
446 | HIR::Lifetime lifetime = lower_lifetime (bound); | |
447 | translated = new HIR::Lifetime (lifetime); | |
448 | } | |
449 | ||
450 | private: | |
451 | ASTLoweringTypeBounds () : ASTLoweringBase (), translated (nullptr) {} | |
452 | ||
453 | HIR::TypeParamBound *translated; | |
454 | }; | |
455 | ||
456 | class ASTLowerWhereClauseItem : public ASTLoweringBase | |
457 | { | |
458 | using Rust::HIR::ASTLoweringBase::visit; | |
459 | ||
460 | public: | |
461 | static HIR::WhereClauseItem *translate (AST::WhereClauseItem &item) | |
462 | { | |
463 | ASTLowerWhereClauseItem compiler; | |
464 | item.accept_vis (compiler); | |
465 | ||
466 | rust_assert (compiler.translated != nullptr); | |
467 | // FIXME | |
468 | // compiler.mappings->insert_location ( | |
469 | // compiler.translated->get_mappings ().get_hirid (), | |
470 | // compiler.translated->get_locus ()); | |
471 | ||
472 | return compiler.translated; | |
473 | } | |
474 | ||
475 | void visit (AST::LifetimeWhereClauseItem &item) override | |
476 | { | |
477 | HIR::Lifetime l = lower_lifetime (item.get_lifetime ()); | |
478 | std::vector<HIR::Lifetime> lifetime_bounds; | |
479 | for (auto &lifetime_bound : item.get_lifetime_bounds ()) | |
480 | { | |
481 | HIR::Lifetime ll = lower_lifetime (lifetime_bound); | |
482 | lifetime_bounds.push_back (std::move (ll)); | |
483 | } | |
484 | ||
485 | auto crate_num = mappings->get_current_crate (); | |
486 | Analysis::NodeMapping mapping (crate_num, item.get_node_id (), | |
487 | mappings->get_next_hir_id (crate_num), | |
488 | UNKNOWN_LOCAL_DEFID); | |
489 | ||
490 | translated = new HIR::LifetimeWhereClauseItem (mapping, std::move (l), | |
491 | std::move (lifetime_bounds), | |
492 | item.get_locus ()); | |
493 | } | |
494 | ||
495 | void visit (AST::TypeBoundWhereClauseItem &item) override | |
496 | { | |
497 | // FIXME | |
498 | std::vector<HIR::LifetimeParam> for_lifetimes; | |
499 | ||
500 | std::unique_ptr<HIR::Type> bound_type = std::unique_ptr<HIR::Type> ( | |
501 | ASTLoweringType::translate (item.get_type ().get ())); | |
502 | ||
503 | std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds; | |
504 | for (auto &bound : item.get_type_param_bounds ()) | |
505 | { | |
506 | HIR::TypeParamBound *b | |
507 | = ASTLoweringTypeBounds::translate (bound.get ()); | |
508 | type_param_bounds.push_back (std::unique_ptr<HIR::TypeParamBound> (b)); | |
509 | } | |
510 | ||
511 | auto crate_num = mappings->get_current_crate (); | |
512 | Analysis::NodeMapping mapping (crate_num, item.get_node_id (), | |
513 | mappings->get_next_hir_id (crate_num), | |
514 | UNKNOWN_LOCAL_DEFID); | |
515 | ||
516 | translated | |
517 | = new HIR::TypeBoundWhereClauseItem (mapping, std::move (for_lifetimes), | |
518 | std::move (bound_type), | |
519 | std::move (type_param_bounds), | |
520 | item.get_locus ()); | |
521 | } | |
522 | ||
523 | private: | |
524 | ASTLowerWhereClauseItem () : ASTLoweringBase (), translated (nullptr) {} | |
525 | ||
526 | HIR::WhereClauseItem *translated; | |
527 | }; | |
528 | ||
529 | } // namespace HIR | |
530 | } // namespace Rust | |
531 | ||
532 | #endif // RUST_AST_LOWER_TYPE |