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1 | // Copyright (C) 2020-2024 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 | void visit (AST::TypePathSegmentFunction &segment) override; | |
38 | void visit (AST::TypePathSegment &segment) override; | |
39 | void visit (AST::TypePathSegmentGeneric &segment) override; | |
40 | void visit (AST::TypePath &path) override; | |
41 | ||
42 | protected: | |
43 | HIR::TypePathSegment *translated_segment; | |
44 | ||
45 | private: | |
46 | HIR::TypePath *translated; | |
47 | }; | |
48 | ||
49 | class ASTLowerQualifiedPathInType : public ASTLowerTypePath | |
50 | { | |
51 | using ASTLowerTypePath::visit; | |
52 | ||
53 | public: | |
54 | static HIR::QualifiedPathInType *translate (AST::QualifiedPathInType &type); | |
55 | ||
56 | void visit (AST::QualifiedPathInType &path) override; | |
57 | ||
58 | private: | |
59 | HIR::QualifiedPathInType *translated; | |
60 | }; | |
61 | ||
62 | class ASTLoweringType : public ASTLoweringBase | |
63 | { | |
64 | using Rust::HIR::ASTLoweringBase::visit; | |
65 | ||
66 | public: | |
67 | static HIR::Type *translate (AST::Type *type) | |
68 | { | |
69 | ASTLoweringType resolver; | |
70 | type->accept_vis (resolver); | |
71 | ||
72 | rust_assert (resolver.translated != nullptr); | |
73 | resolver.mappings->insert_hir_type (resolver.translated); | |
74 | resolver.mappings->insert_location ( | |
75 | resolver.translated->get_mappings ().get_hirid (), | |
76 | resolver.translated->get_locus ()); | |
77 | ||
78 | return resolver.translated; | |
79 | } | |
80 | ||
81 | void visit (AST::BareFunctionType &fntype) override | |
82 | { | |
83 | bool is_variadic = false; | |
84 | std::vector<HIR::LifetimeParam> lifetime_params; | |
85 | HIR::FunctionQualifiers qualifiers | |
86 | = lower_qualifiers (fntype.get_function_qualifiers ()); | |
87 | ||
88 | std::vector<HIR::MaybeNamedParam> named_params; | |
89 | for (auto ¶m : fntype.get_function_params ()) | |
90 | { | |
91 | HIR::MaybeNamedParam::ParamKind kind; | |
92 | switch (param.get_param_kind ()) | |
93 | { | |
94 | case AST::MaybeNamedParam::ParamKind::UNNAMED: | |
95 | kind = HIR::MaybeNamedParam::ParamKind::UNNAMED; | |
96 | break; | |
97 | case AST::MaybeNamedParam::ParamKind::IDENTIFIER: | |
98 | kind = HIR::MaybeNamedParam::ParamKind::IDENTIFIER; | |
99 | break; | |
100 | case AST::MaybeNamedParam::ParamKind::WILDCARD: | |
101 | kind = HIR::MaybeNamedParam::ParamKind::WILDCARD; | |
102 | break; | |
103 | default: | |
104 | gcc_unreachable (); | |
105 | } | |
106 | ||
107 | HIR::Type *param_type | |
108 | = ASTLoweringType::translate (param.get_type ().get ()); | |
109 | ||
110 | HIR::MaybeNamedParam p (param.get_name (), kind, | |
111 | std::unique_ptr<HIR::Type> (param_type), | |
112 | param.get_locus ()); | |
113 | named_params.push_back (std::move (p)); | |
114 | } | |
115 | ||
116 | HIR::Type *return_type = nullptr; | |
117 | if (fntype.has_return_type ()) | |
118 | { | |
119 | return_type | |
120 | = ASTLoweringType::translate (fntype.get_return_type ().get ()); | |
121 | } | |
122 | ||
123 | auto crate_num = mappings->get_current_crate (); | |
124 | Analysis::NodeMapping mapping (crate_num, fntype.get_node_id (), | |
125 | mappings->get_next_hir_id (crate_num), | |
126 | mappings->get_next_localdef_id (crate_num)); | |
127 | ||
128 | translated = new HIR::BareFunctionType ( | |
129 | std::move (mapping), std::move (lifetime_params), std::move (qualifiers), | |
130 | std::move (named_params), is_variadic, | |
131 | std::unique_ptr<HIR::Type> (return_type), fntype.get_locus ()); | |
132 | } | |
133 | ||
134 | void visit (AST::TupleType &tuple) override | |
135 | { | |
136 | std::vector<std::unique_ptr<HIR::Type>> elems; | |
137 | for (auto &e : tuple.get_elems ()) | |
138 | { | |
139 | HIR::Type *t = ASTLoweringType::translate (e.get ()); | |
140 | elems.push_back (std::unique_ptr<HIR::Type> (t)); | |
141 | } | |
142 | ||
143 | auto crate_num = mappings->get_current_crate (); | |
144 | Analysis::NodeMapping mapping (crate_num, tuple.get_node_id (), | |
145 | mappings->get_next_hir_id (crate_num), | |
146 | mappings->get_next_localdef_id (crate_num)); | |
147 | ||
148 | translated = new HIR::TupleType (std::move (mapping), std::move (elems), | |
149 | tuple.get_locus ()); | |
150 | } | |
151 | ||
152 | void visit (AST::TypePath &path) override | |
153 | { | |
154 | translated = ASTLowerTypePath::translate (path); | |
155 | } | |
156 | ||
157 | void visit (AST::QualifiedPathInType &path) override | |
158 | { | |
159 | translated = ASTLowerQualifiedPathInType::translate (path); | |
160 | } | |
161 | ||
162 | void visit (AST::ArrayType &type) override | |
163 | { | |
164 | HIR::Type *translated_type | |
165 | = ASTLoweringType::translate (type.get_elem_type ().get ()); | |
166 | HIR::Expr *array_size | |
167 | = ASTLoweringExpr::translate (type.get_size_expr ().get ()); | |
168 | ||
169 | auto crate_num = mappings->get_current_crate (); | |
170 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
171 | mappings->get_next_hir_id (crate_num), | |
172 | mappings->get_next_localdef_id (crate_num)); | |
173 | ||
174 | translated | |
175 | = new HIR::ArrayType (mapping, | |
176 | std::unique_ptr<HIR::Type> (translated_type), | |
177 | std::unique_ptr<HIR::Expr> (array_size), | |
178 | type.get_locus ()); | |
179 | } | |
180 | ||
181 | void visit (AST::ReferenceType &type) override | |
182 | { | |
183 | HIR::Lifetime lifetime = lower_lifetime (type.get_lifetime ()); | |
184 | ||
185 | HIR::Type *base_type | |
186 | = ASTLoweringType::translate (type.get_base_type ().get ()); | |
187 | ||
188 | auto crate_num = mappings->get_current_crate (); | |
189 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
190 | mappings->get_next_hir_id (crate_num), | |
191 | mappings->get_next_localdef_id (crate_num)); | |
192 | ||
193 | translated = new HIR::ReferenceType (mapping, | |
194 | type.get_has_mut () ? Mutability::Mut | |
195 | : Mutability::Imm, | |
196 | std::unique_ptr<HIR::Type> (base_type), | |
197 | type.get_locus (), lifetime); | |
198 | } | |
199 | ||
200 | void visit (AST::RawPointerType &type) override | |
201 | { | |
202 | HIR::Type *base_type | |
203 | = ASTLoweringType::translate (type.get_type_pointed_to ().get ()); | |
204 | ||
205 | auto crate_num = mappings->get_current_crate (); | |
206 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
207 | mappings->get_next_hir_id (crate_num), | |
208 | mappings->get_next_localdef_id (crate_num)); | |
209 | ||
210 | translated | |
211 | = new HIR::RawPointerType (mapping, | |
212 | type.get_pointer_type () | |
213 | == AST::RawPointerType::PointerType::MUT | |
214 | ? Mutability::Mut | |
215 | : Mutability::Imm, | |
216 | std::unique_ptr<HIR::Type> (base_type), | |
217 | type.get_locus ()); | |
218 | } | |
219 | ||
220 | void visit (AST::SliceType &type) override | |
221 | { | |
222 | HIR::Type *base_type | |
223 | = ASTLoweringType::translate (type.get_elem_type ().get ()); | |
224 | ||
225 | auto crate_num = mappings->get_current_crate (); | |
226 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
227 | mappings->get_next_hir_id (crate_num), | |
228 | mappings->get_next_localdef_id (crate_num)); | |
229 | ||
230 | translated | |
231 | = new HIR::SliceType (mapping, std::unique_ptr<HIR::Type> (base_type), | |
232 | type.get_locus ()); | |
233 | } | |
234 | ||
235 | void visit (AST::InferredType &type) override | |
236 | { | |
237 | auto crate_num = mappings->get_current_crate (); | |
238 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
239 | mappings->get_next_hir_id (crate_num), | |
240 | mappings->get_next_localdef_id (crate_num)); | |
241 | ||
242 | translated = new HIR::InferredType (mapping, type.get_locus ()); | |
243 | } | |
244 | ||
245 | void visit (AST::NeverType &type) override | |
246 | { | |
247 | auto crate_num = mappings->get_current_crate (); | |
248 | Analysis::NodeMapping mapping (crate_num, type.get_node_id (), | |
249 | mappings->get_next_hir_id (crate_num), | |
250 | mappings->get_next_localdef_id (crate_num)); | |
251 | ||
252 | translated = new HIR::NeverType (mapping, type.get_locus ()); | |
253 | } | |
254 | ||
255 | void visit (AST::TraitObjectTypeOneBound &type) override; | |
256 | ||
257 | void visit (AST::TraitObjectType &type) override; | |
258 | ||
259 | private: | |
260 | ASTLoweringType () : ASTLoweringBase (), translated (nullptr) {} | |
261 | ||
262 | HIR::Type *translated; | |
263 | }; | |
264 | ||
265 | class ASTLowerGenericParam : public ASTLoweringBase | |
266 | { | |
267 | using Rust::HIR::ASTLoweringBase::visit; | |
268 | ||
269 | public: | |
270 | static HIR::GenericParam *translate (AST::GenericParam *param) | |
271 | { | |
272 | ASTLowerGenericParam resolver; | |
273 | param->accept_vis (resolver); | |
274 | ||
275 | rust_assert (resolver.translated != nullptr); | |
276 | resolver.mappings->insert_location ( | |
277 | resolver.translated->get_mappings ().get_hirid (), param->get_locus ()); | |
278 | resolver.mappings->insert_hir_generic_param (resolver.translated); | |
279 | ||
280 | return resolver.translated; | |
281 | } | |
282 | ||
283 | void visit (AST::LifetimeParam ¶m) override | |
284 | { | |
285 | auto crate_num = mappings->get_current_crate (); | |
286 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
287 | mappings->get_next_hir_id (crate_num), | |
288 | mappings->get_next_localdef_id (crate_num)); | |
289 | ||
290 | HIR::Lifetime lt (mapping, param.get_lifetime ().get_lifetime_type (), | |
291 | param.get_lifetime ().get_lifetime_name (), | |
292 | param.get_lifetime ().get_locus ()); | |
293 | ||
294 | translated = new HIR::LifetimeParam (mapping, lt, param.get_locus (), | |
295 | std::vector<Lifetime> ()); | |
296 | } | |
297 | ||
298 | void visit (AST::ConstGenericParam ¶m) override | |
299 | { | |
300 | auto crate_num = mappings->get_current_crate (); | |
301 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
302 | mappings->get_next_hir_id (crate_num), | |
303 | mappings->get_next_localdef_id (crate_num)); | |
304 | ||
305 | auto type = ASTLoweringType::translate (param.get_type ().get ()); | |
306 | ||
307 | HIR::Expr *default_expr = nullptr; | |
308 | if (param.has_default_value ()) | |
309 | default_expr = ASTLoweringExpr::translate ( | |
310 | param.get_default_value ().get_expression ().get ()); | |
311 | ||
312 | translated | |
313 | = new HIR::ConstGenericParam (param.get_name (), | |
314 | std::unique_ptr<Type> (type), | |
315 | std::unique_ptr<Expr> (default_expr), | |
316 | mapping, param.get_locus ()); | |
317 | } | |
318 | ||
319 | void visit (AST::TypeParam ¶m) override | |
320 | { | |
321 | AST::Attribute outer_attr = AST::Attribute::create_empty (); | |
322 | std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds; | |
323 | if (param.has_type_param_bounds ()) | |
324 | { | |
325 | for (auto &bound : param.get_type_param_bounds ()) | |
326 | { | |
327 | HIR::TypeParamBound *lowered_bound = lower_bound (bound.get ()); | |
328 | type_param_bounds.push_back ( | |
329 | std::unique_ptr<HIR::TypeParamBound> (lowered_bound)); | |
330 | } | |
331 | } | |
332 | ||
333 | HIR::Type *type = param.has_type () | |
334 | ? ASTLoweringType::translate (param.get_type ().get ()) | |
335 | : nullptr; | |
336 | ||
337 | auto crate_num = mappings->get_current_crate (); | |
338 | Analysis::NodeMapping mapping (crate_num, param.get_node_id (), | |
339 | mappings->get_next_hir_id (crate_num), | |
340 | mappings->get_next_localdef_id (crate_num)); | |
341 | ||
342 | translated | |
343 | = new HIR::TypeParam (mapping, param.get_type_representation (), | |
344 | param.get_locus (), std::move (type_param_bounds), | |
345 | std::unique_ptr<Type> (type), | |
346 | std::move (outer_attr)); | |
347 | } | |
348 | ||
349 | private: | |
350 | ASTLowerGenericParam () : ASTLoweringBase (), translated (nullptr) {} | |
351 | ||
352 | HIR::GenericParam *translated; | |
353 | }; | |
354 | ||
355 | class ASTLoweringTypeBounds : public ASTLoweringBase | |
356 | { | |
357 | using Rust::HIR::ASTLoweringBase::visit; | |
358 | ||
359 | public: | |
360 | static HIR::TypeParamBound *translate (AST::TypeParamBound *type) | |
361 | { | |
362 | ASTLoweringTypeBounds resolver; | |
363 | type->accept_vis (resolver); | |
364 | ||
365 | rust_assert (resolver.translated != nullptr); | |
366 | resolver.mappings->insert_location ( | |
367 | resolver.translated->get_mappings ().get_hirid (), | |
368 | resolver.translated->get_locus ()); | |
369 | ||
370 | return resolver.translated; | |
371 | } | |
372 | ||
373 | void visit (AST::TraitBound &bound) override | |
374 | { | |
375 | // FIXME | |
376 | std::vector<HIR::LifetimeParam> lifetimes; | |
377 | ||
378 | AST::TypePath &ast_trait_path = bound.get_type_path (); | |
379 | HIR::TypePath *trait_path = ASTLowerTypePath::translate (ast_trait_path); | |
380 | ||
381 | auto crate_num = mappings->get_current_crate (); | |
382 | Analysis::NodeMapping mapping (crate_num, bound.get_node_id (), | |
383 | mappings->get_next_hir_id (crate_num), | |
384 | UNKNOWN_LOCAL_DEFID); | |
385 | ||
386 | translated = new HIR::TraitBound (mapping, *trait_path, bound.get_locus (), | |
387 | bound.is_in_parens (), | |
388 | bound.has_opening_question_mark ()); | |
389 | } | |
390 | ||
391 | void visit (AST::Lifetime &bound) override | |
392 | { | |
393 | HIR::Lifetime lifetime = lower_lifetime (bound); | |
394 | translated = new HIR::Lifetime (lifetime); | |
395 | } | |
396 | ||
397 | private: | |
398 | ASTLoweringTypeBounds () : ASTLoweringBase (), translated (nullptr) {} | |
399 | ||
400 | HIR::TypeParamBound *translated; | |
401 | }; | |
402 | ||
403 | class ASTLowerWhereClauseItem : public ASTLoweringBase | |
404 | { | |
405 | using Rust::HIR::ASTLoweringBase::visit; | |
406 | ||
407 | public: | |
408 | static HIR::WhereClauseItem *translate (AST::WhereClauseItem &item) | |
409 | { | |
410 | ASTLowerWhereClauseItem compiler; | |
411 | item.accept_vis (compiler); | |
412 | ||
413 | rust_assert (compiler.translated != nullptr); | |
414 | // FIXME | |
415 | // compiler.mappings->insert_location ( | |
416 | // compiler.translated->get_mappings ().get_hirid (), | |
417 | // compiler.translated->get_locus ()); | |
418 | ||
419 | return compiler.translated; | |
420 | } | |
421 | ||
422 | void visit (AST::LifetimeWhereClauseItem &item) override | |
423 | { | |
424 | HIR::Lifetime l = lower_lifetime (item.get_lifetime ()); | |
425 | std::vector<HIR::Lifetime> lifetime_bounds; | |
426 | for (auto &lifetime_bound : item.get_lifetime_bounds ()) | |
427 | { | |
428 | HIR::Lifetime ll = lower_lifetime (lifetime_bound); | |
429 | lifetime_bounds.push_back (std::move (ll)); | |
430 | } | |
431 | ||
432 | auto crate_num = mappings->get_current_crate (); | |
433 | Analysis::NodeMapping mapping (crate_num, item.get_node_id (), | |
434 | mappings->get_next_hir_id (crate_num), | |
435 | UNKNOWN_LOCAL_DEFID); | |
436 | ||
437 | translated = new HIR::LifetimeWhereClauseItem (mapping, std::move (l), | |
438 | std::move (lifetime_bounds), | |
439 | item.get_locus ()); | |
440 | } | |
441 | ||
442 | void visit (AST::TypeBoundWhereClauseItem &item) override | |
443 | { | |
444 | // FIXME | |
445 | std::vector<HIR::LifetimeParam> for_lifetimes; | |
446 | ||
447 | std::unique_ptr<HIR::Type> bound_type = std::unique_ptr<HIR::Type> ( | |
448 | ASTLoweringType::translate (item.get_type ().get ())); | |
449 | ||
450 | std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds; | |
451 | for (auto &bound : item.get_type_param_bounds ()) | |
452 | { | |
453 | HIR::TypeParamBound *b | |
454 | = ASTLoweringTypeBounds::translate (bound.get ()); | |
455 | type_param_bounds.push_back (std::unique_ptr<HIR::TypeParamBound> (b)); | |
456 | } | |
457 | ||
458 | auto crate_num = mappings->get_current_crate (); | |
459 | Analysis::NodeMapping mapping (crate_num, item.get_node_id (), | |
460 | mappings->get_next_hir_id (crate_num), | |
461 | UNKNOWN_LOCAL_DEFID); | |
462 | ||
463 | translated | |
464 | = new HIR::TypeBoundWhereClauseItem (mapping, std::move (for_lifetimes), | |
465 | std::move (bound_type), | |
466 | std::move (type_param_bounds), | |
467 | item.get_locus ()); | |
468 | } | |
469 | ||
470 | private: | |
471 | ASTLowerWhereClauseItem () : ASTLoweringBase (), translated (nullptr) {} | |
472 | ||
473 | HIR::WhereClauseItem *translated; | |
474 | }; | |
475 | ||
476 | } // namespace HIR | |
477 | } // namespace Rust | |
478 | ||
479 | #endif // RUST_AST_LOWER_TYPE |