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1 : // Copyright (C) 2020-2026 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 : #include "rust-ast-lower-item.h"
20 : #include "rust-diagnostics.h"
21 : #include "rust-ast-lower.h"
22 : #include "rust-ast-lower-base.h"
23 : #include "rust-ast-lower-enumitem.h"
24 : #include "rust-ast-lower-type.h"
25 : #include "rust-ast-lower-implitem.h"
26 : #include "rust-ast-lower-expr.h"
27 : #include "rust-ast-lower-pattern.h"
28 : #include "rust-ast-lower-block.h"
29 : #include "rust-item.h"
30 :
31 : namespace Rust {
32 : namespace HIR {
33 :
34 : HIR::Item *
35 26246 : ASTLoweringItem::translate (AST::Item &item)
36 : {
37 26246 : ASTLoweringItem resolver;
38 26246 : item.accept_vis (resolver);
39 :
40 26238 : if (resolver.translated != nullptr)
41 : {
42 24515 : auto id = resolver.translated->get_mappings ().get_hirid ();
43 24515 : auto defid = resolver.translated->get_mappings ().get_defid ();
44 24515 : auto locus = resolver.translated->get_locus ();
45 :
46 24515 : resolver.handle_outer_attributes (*resolver.translated);
47 24515 : resolver.mappings.insert_ast_item (&item);
48 24515 : resolver.mappings.insert_hir_item (resolver.translated);
49 24515 : resolver.mappings.insert_location (id, locus);
50 24515 : resolver.mappings.insert_defid_mapping (defid, resolver.translated);
51 : }
52 :
53 26238 : return resolver.translated;
54 26238 : }
55 :
56 : void
57 1257 : ASTLoweringItem::visit (AST::Module &module)
58 : {
59 1257 : auto crate_num = mappings.get_current_crate ();
60 2514 : Analysis::NodeMapping mapping (crate_num, module.get_node_id (),
61 1257 : mappings.get_next_hir_id (crate_num),
62 1257 : mappings.get_next_localdef_id (crate_num));
63 :
64 : // should be lowered from module.get_vis()
65 1257 : HIR::Visibility vis = translate_visibility (module.get_visibility ());
66 :
67 1257 : auto items = std::vector<std::unique_ptr<Item>> ();
68 :
69 5947 : for (auto &item : module.get_items ())
70 : {
71 4690 : auto transitem = translate (*item);
72 : // The item may be null if it doesn't need to live in the HIR - for
73 : // example, macro rules definitions
74 4690 : if (transitem)
75 4186 : items.emplace_back (transitem);
76 : }
77 :
78 : // should be lowered/copied from module.get_in/outer_attrs()
79 1257 : AST::AttrVec inner_attrs = module.get_inner_attrs ();
80 1257 : AST::AttrVec outer_attrs = module.get_outer_attrs ();
81 :
82 1257 : translated
83 1257 : = new HIR::Module (mapping, module.get_name (), module.get_locus (),
84 : std::move (items), std::move (vis),
85 2514 : std::move (inner_attrs), std::move (outer_attrs));
86 1257 : mappings.insert_module (static_cast<Module *> (translated));
87 1257 : }
88 :
89 : void
90 71 : ASTLoweringItem::visit (AST::TypeAlias &alias)
91 : {
92 71 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
93 71 : where_clause_items.reserve (alias.get_where_clause ().get_items ().size ());
94 :
95 71 : for (auto &item : alias.get_where_clause ().get_items ())
96 0 : where_clause_items.emplace_back (
97 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
98 :
99 71 : HIR::WhereClause where_clause (std::move (where_clause_items));
100 71 : HIR::Visibility vis = translate_visibility (alias.get_visibility ());
101 :
102 71 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
103 71 : if (alias.has_generics ())
104 9 : generic_params = lower_generic_params (alias.get_generic_params ());
105 :
106 71 : HIR::Type *existing_type
107 71 : = ASTLoweringType::translate (alias.get_type_aliased ());
108 :
109 71 : auto crate_num = mappings.get_current_crate ();
110 71 : Analysis::NodeMapping mapping (crate_num, alias.get_node_id (),
111 71 : mappings.get_next_hir_id (crate_num),
112 71 : mappings.get_next_localdef_id (crate_num));
113 :
114 71 : translated
115 71 : = new HIR::TypeAlias (mapping, alias.get_new_type_name (),
116 : std::move (generic_params), std::move (where_clause),
117 142 : std::unique_ptr<HIR::Type> (existing_type),
118 71 : std::move (vis), alias.get_outer_attrs (),
119 213 : alias.get_locus ());
120 71 : }
121 :
122 : void
123 1014 : ASTLoweringItem::visit (AST::TupleStruct &struct_decl)
124 : {
125 1014 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
126 1014 : if (struct_decl.has_generics ())
127 : {
128 309 : generic_params = lower_generic_params (struct_decl.get_generic_params ());
129 : }
130 :
131 1014 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
132 1014 : where_clause_items.reserve (
133 1014 : struct_decl.get_where_clause ().get_items ().size ());
134 :
135 1014 : for (auto &item : struct_decl.get_where_clause ().get_items ())
136 0 : where_clause_items.emplace_back (
137 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
138 :
139 1014 : HIR::WhereClause where_clause (std::move (where_clause_items));
140 1014 : HIR::Visibility vis = translate_visibility (struct_decl.get_visibility ());
141 :
142 1014 : std::vector<HIR::TupleField> fields;
143 1014 : fields.reserve (struct_decl.get_fields ().size ());
144 :
145 2811 : for (AST::TupleField &field : struct_decl.get_fields ())
146 : {
147 1797 : if (field.get_field_type ().is_marked_for_strip ())
148 0 : continue;
149 :
150 : // FIXME: How do we get the visibility from here?
151 1797 : HIR::Visibility vis = translate_visibility (field.get_visibility ());
152 1797 : HIR::Type *type = ASTLoweringType::translate (field.get_field_type ());
153 :
154 1797 : auto crate_num = mappings.get_current_crate ();
155 1797 : Analysis::NodeMapping mapping (crate_num, field.get_node_id (),
156 1797 : mappings.get_next_hir_id (crate_num),
157 1797 : mappings.get_next_localdef_id (crate_num));
158 :
159 1797 : fields.emplace_back (mapping, std::unique_ptr<HIR::Type> (type), vis,
160 3594 : field.get_locus (), field.get_outer_attrs ());
161 1797 : }
162 :
163 1014 : auto crate_num = mappings.get_current_crate ();
164 2028 : Analysis::NodeMapping mapping (crate_num, struct_decl.get_node_id (),
165 1014 : mappings.get_next_hir_id (crate_num),
166 1014 : mappings.get_next_localdef_id (crate_num));
167 :
168 2028 : translated = new HIR::TupleStruct (mapping, std::move (fields),
169 1014 : struct_decl.get_identifier (),
170 : std::move (generic_params),
171 : std::move (where_clause), vis,
172 1014 : struct_decl.get_outer_attrs (),
173 1014 : struct_decl.get_locus ());
174 1014 : }
175 :
176 : void
177 1708 : ASTLoweringItem::visit (AST::StructStruct &struct_decl)
178 : {
179 1708 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
180 1708 : if (struct_decl.has_generics ())
181 : {
182 531 : generic_params = lower_generic_params (struct_decl.get_generic_params ());
183 : }
184 :
185 1708 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
186 1708 : where_clause_items.reserve (
187 1708 : struct_decl.get_where_clause ().get_items ().size ());
188 :
189 1714 : for (auto &item : struct_decl.get_where_clause ().get_items ())
190 6 : where_clause_items.emplace_back (
191 6 : ASTLowerWhereClauseItem::translate (*item.get ()));
192 :
193 1708 : HIR::WhereClause where_clause (std::move (where_clause_items));
194 :
195 1708 : HIR::Visibility vis = translate_visibility (struct_decl.get_visibility ());
196 :
197 1708 : bool is_unit = struct_decl.is_unit_struct ();
198 1708 : std::vector<HIR::StructField> fields;
199 3702 : for (AST::StructField &field : struct_decl.get_fields ())
200 : {
201 1994 : if (field.get_field_type ().is_marked_for_strip ())
202 4 : continue;
203 :
204 1994 : HIR::Visibility vis = translate_visibility (field.get_visibility ());
205 1994 : HIR::Type *type = ASTLoweringType::translate (field.get_field_type ());
206 :
207 1994 : auto crate_num = mappings.get_current_crate ();
208 1994 : Analysis::NodeMapping mapping (crate_num, field.get_node_id (),
209 1994 : mappings.get_next_hir_id (crate_num),
210 1994 : mappings.get_next_localdef_id (crate_num));
211 :
212 1994 : HIR::StructField translated_field (mapping, field.get_field_name (),
213 3988 : std::unique_ptr<HIR::Type> (type), vis,
214 : field.get_locus (),
215 3988 : field.get_outer_attrs ());
216 :
217 1994 : if (struct_field_name_exists (fields, translated_field))
218 4 : continue;
219 :
220 1990 : fields.push_back (std::move (translated_field));
221 1994 : }
222 :
223 1708 : auto crate_num = mappings.get_current_crate ();
224 3416 : Analysis::NodeMapping mapping (crate_num, struct_decl.get_node_id (),
225 1708 : mappings.get_next_hir_id (crate_num),
226 1708 : mappings.get_next_localdef_id (crate_num));
227 :
228 3416 : translated = new HIR::StructStruct (mapping, std::move (fields),
229 1708 : struct_decl.get_identifier (),
230 : std::move (generic_params),
231 : std::move (where_clause), is_unit, vis,
232 1708 : struct_decl.get_outer_attrs (),
233 1708 : struct_decl.get_locus ());
234 1708 : }
235 :
236 : void
237 567 : ASTLoweringItem::visit (AST::Enum &enum_decl)
238 : {
239 567 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
240 567 : if (enum_decl.has_generics ())
241 : {
242 245 : generic_params = lower_generic_params (enum_decl.get_generic_params ());
243 : }
244 :
245 567 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
246 567 : where_clause_items.reserve (
247 567 : enum_decl.get_where_clause ().get_items ().size ());
248 :
249 567 : for (auto &item : enum_decl.get_where_clause ().get_items ())
250 0 : where_clause_items.emplace_back (
251 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
252 :
253 567 : HIR::WhereClause where_clause (std::move (where_clause_items));
254 567 : HIR::Visibility vis = translate_visibility (enum_decl.get_visibility ());
255 :
256 : // bool is_unit = enum_decl.is_zero_variant ();
257 567 : std::vector<std::unique_ptr<HIR::EnumItem>> items;
258 567 : items.reserve (enum_decl.get_variants ().size ());
259 :
260 1878 : for (auto &variant : enum_decl.get_variants ())
261 : {
262 1311 : if (variant->is_marked_for_strip ())
263 0 : continue;
264 :
265 1311 : items.emplace_back (ASTLoweringEnumItem::translate (variant.get ()));
266 : }
267 :
268 567 : auto crate_num = mappings.get_current_crate ();
269 1134 : Analysis::NodeMapping mapping (crate_num, enum_decl.get_node_id (),
270 567 : mappings.get_next_hir_id (crate_num),
271 567 : mappings.get_next_localdef_id (crate_num));
272 :
273 567 : HIR::Enum *hir_enum
274 567 : = new HIR::Enum (mapping, enum_decl.get_identifier (), vis,
275 : std::move (generic_params), std::move (where_clause),
276 567 : std::move (items), enum_decl.get_outer_attrs (),
277 1134 : enum_decl.get_locus ());
278 567 : translated = hir_enum;
279 1878 : for (auto &variant : hir_enum->get_variants ())
280 : {
281 1311 : mappings.insert_hir_enumitem (hir_enum, variant.get ());
282 : }
283 567 : }
284 :
285 : void
286 107 : ASTLoweringItem::visit (AST::Union &union_decl)
287 : {
288 107 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
289 107 : if (union_decl.has_generics ())
290 75 : generic_params = lower_generic_params (union_decl.get_generic_params ());
291 :
292 107 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
293 107 : where_clause_items.reserve (
294 107 : union_decl.get_where_clause ().get_items ().size ());
295 :
296 107 : for (auto &item : union_decl.get_where_clause ().get_items ())
297 0 : where_clause_items.emplace_back (
298 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
299 :
300 107 : HIR::WhereClause where_clause (std::move (where_clause_items));
301 107 : HIR::Visibility vis = translate_visibility (union_decl.get_visibility ());
302 :
303 107 : std::vector<HIR::StructField> variants;
304 417 : for (AST::StructField &variant : union_decl.get_variants ())
305 : {
306 312 : if (variant.get_field_type ().is_marked_for_strip ())
307 0 : continue;
308 :
309 : // FIXME: Does visibility apply here?
310 312 : HIR::Visibility vis = translate_visibility (variant.get_visibility ());
311 312 : HIR::Type *type = ASTLoweringType::translate (variant.get_field_type ());
312 :
313 312 : auto crate_num = mappings.get_current_crate ();
314 312 : Analysis::NodeMapping mapping (crate_num, variant.get_node_id (),
315 312 : mappings.get_next_hir_id (crate_num),
316 312 : mappings.get_next_localdef_id (crate_num));
317 :
318 312 : HIR::StructField translated_variant (mapping, variant.get_field_name (),
319 624 : std::unique_ptr<HIR::Type> (type),
320 : vis, variant.get_locus (),
321 624 : variant.get_outer_attrs ());
322 :
323 312 : if (struct_field_name_exists (variants, translated_variant))
324 : break;
325 :
326 310 : variants.push_back (std::move (translated_variant));
327 312 : }
328 :
329 107 : auto crate_num = mappings.get_current_crate ();
330 214 : Analysis::NodeMapping mapping (crate_num, union_decl.get_node_id (),
331 107 : mappings.get_next_hir_id (crate_num),
332 107 : mappings.get_next_localdef_id (crate_num));
333 :
334 107 : translated
335 107 : = new HIR::Union (mapping, union_decl.get_identifier (), vis,
336 : std::move (generic_params), std::move (where_clause),
337 107 : std::move (variants), union_decl.get_outer_attrs (),
338 214 : union_decl.get_locus ());
339 107 : }
340 :
341 : void
342 57 : ASTLoweringItem::visit (AST::StaticItem &var)
343 : {
344 57 : HIR::Visibility vis = translate_visibility (var.get_visibility ());
345 :
346 57 : HIR::Type *type = ASTLoweringType::translate (var.get_type (), true);
347 57 : HIR::Expr *expr = ASTLoweringExpr::translate (var.get_expr ());
348 :
349 57 : auto crate_num = mappings.get_current_crate ();
350 114 : Analysis::NodeMapping mapping (crate_num, var.get_node_id (),
351 57 : mappings.get_next_hir_id (crate_num),
352 57 : mappings.get_next_localdef_id (crate_num));
353 :
354 57 : translated = new HIR::StaticItem (mapping, var.get_identifier (),
355 57 : var.is_mutable () ? Mutability::Mut
356 : : Mutability::Imm,
357 57 : std::unique_ptr<HIR::Type> (type),
358 114 : std::unique_ptr<HIR::Expr> (expr), vis,
359 171 : var.get_outer_attrs (), var.get_locus ());
360 57 : }
361 :
362 : void
363 487 : ASTLoweringItem::visit (AST::ConstantItem &constant)
364 : {
365 487 : HIR::Visibility vis = translate_visibility (constant.get_visibility ());
366 :
367 487 : HIR::Type *type = ASTLoweringType::translate (constant.get_type (), true);
368 487 : HIR::Expr *expr = nullptr;
369 487 : if (constant.has_expr ())
370 486 : expr = ASTLoweringExpr::translate (constant.get_expr ());
371 :
372 487 : auto crate_num = mappings.get_current_crate ();
373 487 : Analysis::NodeMapping mapping (crate_num, constant.get_node_id (),
374 487 : mappings.get_next_hir_id (crate_num),
375 487 : mappings.get_next_localdef_id (crate_num));
376 :
377 487 : translated = new HIR::ConstantItem (mapping, constant.get_identifier (), vis,
378 1461 : std::unique_ptr<HIR::Type> (type),
379 974 : std::unique_ptr<HIR::Expr> (expr),
380 487 : constant.get_outer_attrs (),
381 1461 : constant.get_locus ());
382 487 : }
383 :
384 : void
385 6964 : ASTLoweringItem::visit (AST::Function &function)
386 : {
387 6964 : if (function.is_marked_for_strip ())
388 0 : return;
389 :
390 6964 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
391 6964 : where_clause_items.reserve (
392 6964 : function.get_where_clause ().get_items ().size ());
393 :
394 7023 : for (auto &item : function.get_where_clause ().get_items ())
395 59 : where_clause_items.emplace_back (
396 59 : ASTLowerWhereClauseItem::translate (*item.get ()));
397 :
398 6964 : HIR::WhereClause where_clause (std::move (where_clause_items));
399 6964 : HIR::FunctionQualifiers qualifiers
400 6964 : = lower_qualifiers (function.get_qualifiers ());
401 6964 : HIR::Visibility vis = translate_visibility (function.get_visibility ());
402 :
403 : // need
404 6964 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
405 6964 : if (function.has_generics ())
406 : {
407 683 : generic_params = lower_generic_params (function.get_generic_params ());
408 : }
409 6964 : Identifier function_name = function.get_function_name ();
410 6964 : location_t locus = function.get_locus ();
411 :
412 6964 : std::unique_ptr<HIR::Type> return_type
413 6964 : = function.has_return_type () ? std::unique_ptr<HIR::Type> (
414 : ASTLoweringType::translate (function.get_return_type (), false,
415 : ASTLoweringType::ImplTrait::Allow))
416 6964 : : nullptr;
417 :
418 6964 : std::vector<HIR::FunctionParam> function_params;
419 6964 : function_params.reserve (function.get_function_params ().size ());
420 :
421 6964 : auto crate_num = mappings.get_current_crate ();
422 9150 : for (auto &p : function.get_function_params ())
423 : {
424 2186 : if (p->is_variadic ())
425 2 : continue;
426 2186 : if (p->is_self ())
427 : {
428 0 : rich_location r (line_table, p->get_locus ());
429 0 : r.add_range (function.get_locus ());
430 0 : rust_error_at (
431 : r, "%<self%> parameter is only allowed in associated functions");
432 :
433 : // rustc creates a synthetic regular fn-param here pointing to a
434 : // generic Self as far as i can see but that seems over the top for
435 : // now.
436 : //
437 : // see this example (invalid code):
438 : //
439 : // pub trait X {
440 : // fn x() {
441 : // fn f(&mut self) {}
442 : // f();
443 : // }
444 : // }
445 : //
446 : // without a synthetic param we wont get the number of args error as
447 : // well but i think this is fine for now.
448 : //
449 : // problem is what we make the param type to become...
450 :
451 0 : continue;
452 0 : }
453 :
454 2186 : auto ¶m = static_cast<AST::FunctionParam &> (*p);
455 :
456 2186 : auto translated_pattern = std::unique_ptr<HIR::Pattern> (
457 2186 : ASTLoweringPattern::translate (param.get_pattern ()));
458 :
459 2186 : switch (param.get_pattern ().get_pattern_kind ())
460 : {
461 2 : case AST::Pattern::Kind::Literal:
462 2 : rust_error_at (param.get_locus (),
463 : "refutable pattern in function argument");
464 2 : continue;
465 2184 : default:
466 : // defer checking for when we have type information after lowering
467 2184 : break;
468 : }
469 :
470 2184 : auto translated_type = std::unique_ptr<HIR::Type> (
471 2184 : ASTLoweringType::translate (param.get_type ()));
472 :
473 2184 : auto crate_num = mappings.get_current_crate ();
474 2184 : Analysis::NodeMapping mapping (crate_num, param.get_node_id (),
475 2184 : mappings.get_next_hir_id (crate_num),
476 2184 : UNKNOWN_LOCAL_DEFID);
477 :
478 2184 : function_params.emplace_back (mapping, std::move (translated_pattern),
479 : std::move (translated_type),
480 2184 : param.get_locus ());
481 2186 : }
482 :
483 6964 : bool terminated = false;
484 6964 : std::unique_ptr<HIR::BlockExpr> function_body
485 : = std::unique_ptr<HIR::BlockExpr> (
486 6964 : ASTLoweringBlock::translate (*function.get_definition ().value (),
487 6964 : &terminated));
488 :
489 13928 : Analysis::NodeMapping mapping (crate_num, function.get_node_id (),
490 6964 : mappings.get_next_hir_id (crate_num),
491 6964 : mappings.get_next_localdef_id (crate_num));
492 :
493 6964 : mappings.insert_location (function_body->get_mappings ().get_hirid (),
494 : function.get_locus ());
495 :
496 6964 : Defaultness defaultness
497 6964 : = function.is_default () ? Defaultness::Default : Defaultness::Final;
498 :
499 6964 : auto fn
500 : = new HIR::Function (mapping, std::move (function_name),
501 : std::move (qualifiers), std::move (generic_params),
502 : std::move (function_params), std::move (return_type),
503 : std::move (where_clause), std::move (function_body),
504 6964 : std::move (vis), function.get_outer_attrs (),
505 6964 : tl::nullopt, defaultness, locus);
506 :
507 : // add the mappings for the function params at the end
508 9148 : for (auto ¶m : fn->get_function_params ())
509 : {
510 2184 : mappings.insert_hir_param (¶m);
511 2184 : mappings.insert_location (mapping.get_hirid (), param.get_locus ());
512 : }
513 :
514 6964 : translated = fn;
515 6964 : }
516 :
517 : void
518 1047 : ASTLoweringItem::visit (AST::InherentImpl &impl_block)
519 : {
520 1047 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
521 1047 : where_clause_items.reserve (
522 1047 : impl_block.get_where_clause ().get_items ().size ());
523 :
524 1047 : for (auto &item : impl_block.get_where_clause ().get_items ())
525 0 : where_clause_items.emplace_back (
526 0 : ASTLowerWhereClauseItem::translate (*item));
527 :
528 1047 : HIR::WhereClause where_clause (std::move (where_clause_items));
529 1047 : HIR::Visibility vis = translate_visibility (impl_block.get_visibility ());
530 :
531 1047 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
532 1047 : if (impl_block.has_generics ())
533 : {
534 359 : generic_params = lower_generic_params (impl_block.get_generic_params ());
535 :
536 719 : for (auto &generic_param : generic_params)
537 : {
538 360 : switch (generic_param->get_kind ())
539 : {
540 332 : case HIR::GenericParam::GenericKind::TYPE:
541 332 : {
542 332 : const HIR::TypeParam &t
543 332 : = static_cast<const HIR::TypeParam &> (*generic_param);
544 :
545 332 : if (t.has_type ())
546 : {
547 1 : rich_location rich_locus (line_table, t.get_locus ());
548 1 : rich_locus.add_fixit_replace (
549 : t.get_locus (),
550 : "for more information, see issue #36887 "
551 : "<https://github.com/rust-lang/rust/issues/36887>");
552 1 : rust_error_at (rich_locus,
553 : "defaults for type parameters are only "
554 : "allowed in %<struct%>, %<enum%>, %<type%>, "
555 : "or %<trait%> definitions");
556 1 : }
557 : }
558 : break;
559 :
560 : default:
561 : break;
562 : }
563 : }
564 : }
565 :
566 1047 : HIR::Type *impl_type = ASTLoweringType::translate (impl_block.get_type ());
567 :
568 1047 : auto crate_num = mappings.get_current_crate ();
569 2094 : Analysis::NodeMapping mapping (crate_num, impl_block.get_node_id (),
570 1047 : mappings.get_next_hir_id (crate_num),
571 1047 : mappings.get_next_localdef_id (crate_num));
572 :
573 2094 : std::vector<std::unique_ptr<HIR::ImplItem>> impl_items;
574 1047 : std::vector<HirId> impl_item_ids;
575 4261 : for (auto &impl_item : impl_block.get_impl_items ())
576 : {
577 3214 : if (impl_item->is_marked_for_strip ())
578 0 : continue;
579 :
580 3214 : HIR::ImplItem *lowered
581 3214 : = ASTLowerImplItem::translate (*impl_item, mapping.get_hirid ());
582 3214 : rust_assert (lowered != nullptr);
583 3214 : impl_items.emplace_back (lowered);
584 3214 : impl_item_ids.push_back (lowered->get_impl_mappings ().get_hirid ());
585 : }
586 :
587 1047 : BoundPolarity polarity = BoundPolarity::RegularBound;
588 1047 : HIR::ImplBlock *hir_impl_block = new HIR::ImplBlock (
589 : mapping, std::move (impl_items), std::move (generic_params),
590 1047 : std::unique_ptr<HIR::Type> (impl_type), nullptr, where_clause, polarity,
591 2094 : vis, impl_block.get_inner_attrs (), impl_block.get_outer_attrs (),
592 1047 : impl_block.get_locus (), false);
593 1047 : translated = hir_impl_block;
594 :
595 1047 : mappings.insert_hir_impl_block (hir_impl_block);
596 4261 : for (auto &impl_item_id : impl_item_ids)
597 : {
598 3214 : mappings.insert_impl_item_mapping (impl_item_id, hir_impl_block);
599 : }
600 1047 : }
601 :
602 : void
603 4190 : ASTLoweringItem::visit (AST::Trait &trait)
604 : {
605 4190 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
606 4190 : where_clause_items.reserve (trait.get_where_clause ().get_items ().size ());
607 :
608 4197 : for (auto &item : trait.get_where_clause ().get_items ())
609 7 : where_clause_items.emplace_back (
610 7 : ASTLowerWhereClauseItem::translate (*item.get ()));
611 :
612 4190 : HIR::WhereClause where_clause (std::move (where_clause_items));
613 :
614 4190 : HIR::Visibility vis = translate_visibility (trait.get_visibility ());
615 :
616 4190 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
617 4190 : if (trait.has_generics ())
618 : {
619 701 : generic_params = lower_generic_params (trait.get_generic_params ());
620 : }
621 :
622 : // TODO: separate "Self" from normal generic parameters
623 : // in HIR as well as in AST?
624 4190 : HIR::GenericParam *self_param
625 4190 : = ASTLowerGenericParam::translate (trait.get_implicit_self ());
626 4190 : generic_params.emplace (generic_params.begin (), self_param);
627 :
628 4190 : std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds;
629 4190 : if (trait.has_type_param_bounds ())
630 : {
631 1216 : for (auto &bound : trait.get_type_param_bounds ())
632 645 : type_param_bounds.emplace_back (lower_bound (*bound));
633 : }
634 :
635 4190 : auto trait_item_size = trait.get_trait_items ().size ();
636 :
637 4190 : std::vector<std::unique_ptr<HIR::TraitItem>> trait_items;
638 4190 : trait_items.reserve (trait_item_size);
639 4190 : std::vector<HirId> trait_item_ids;
640 4190 : trait_item_ids.reserve (trait_item_size);
641 :
642 7804 : for (auto &item : trait.get_trait_items ())
643 : {
644 3614 : if (item->is_marked_for_strip ())
645 0 : continue;
646 :
647 3614 : HIR::TraitItem *lowered = ASTLowerTraitItem::translate (*item);
648 3614 : trait_item_ids.push_back (lowered->get_mappings ().get_hirid ());
649 3614 : trait_items.emplace_back (lowered);
650 : }
651 :
652 4190 : auto crate_num = mappings.get_current_crate ();
653 8380 : Analysis::NodeMapping mapping (crate_num, trait.get_node_id (),
654 4190 : mappings.get_next_hir_id (crate_num),
655 4190 : mappings.get_next_localdef_id (crate_num));
656 :
657 4190 : auto trait_unsafety
658 4190 : = trait.is_unsafe () ? Unsafety::Unsafe : Unsafety::Normal;
659 :
660 4190 : HIR::Trait *hir_trait
661 8380 : = new HIR::Trait (mapping, trait.get_identifier (), trait_unsafety,
662 : std::move (generic_params), std::move (type_param_bounds),
663 : where_clause, std::move (trait_items), vis,
664 4190 : trait.get_outer_attrs (), trait.get_locus ());
665 :
666 4190 : if (trait.is_auto ())
667 15 : mappings.insert_auto_trait (hir_trait);
668 :
669 4190 : translated = hir_trait;
670 :
671 7804 : for (auto trait_item_id : trait_item_ids)
672 : {
673 3614 : mappings.insert_trait_item_mapping (trait_item_id, hir_trait);
674 : }
675 4190 : }
676 :
677 : void
678 5348 : ASTLoweringItem::visit (AST::TraitImpl &impl_block)
679 : {
680 5348 : bool unsafe = impl_block.is_unsafe ();
681 :
682 5348 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
683 5348 : where_clause_items.reserve (
684 5348 : impl_block.get_where_clause ().get_items ().size ());
685 :
686 5449 : for (auto &item : impl_block.get_where_clause ().get_items ())
687 101 : where_clause_items.emplace_back (
688 101 : ASTLowerWhereClauseItem::translate (*item));
689 :
690 5348 : HIR::WhereClause where_clause (std::move (where_clause_items));
691 5348 : HIR::Visibility vis = translate_visibility (impl_block.get_visibility ());
692 :
693 5348 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
694 5348 : if (impl_block.has_generics ())
695 : {
696 714 : generic_params = lower_generic_params (impl_block.get_generic_params ());
697 :
698 1560 : for (auto &generic_param : generic_params)
699 : {
700 846 : switch (generic_param->get_kind ())
701 : {
702 764 : case HIR::GenericParam::GenericKind::TYPE:
703 764 : {
704 764 : const HIR::TypeParam &t
705 764 : = static_cast<const HIR::TypeParam &> (*generic_param);
706 :
707 764 : if (t.has_type ())
708 : {
709 0 : rich_location rich_locus (line_table, t.get_locus ());
710 0 : rich_locus.add_fixit_replace (
711 : t.get_locus (), "for more information, see issue #36887 "
712 : "<https://github.com/rust-lang/rust/"
713 : "issues/36887>");
714 0 : rust_error_at (rich_locus,
715 : "defaults for type parameters are only "
716 : "allowed in %<struct%>, %<enum%>, %<type%>, "
717 : "or %<trait%> definitions");
718 0 : }
719 : }
720 : break;
721 :
722 : default:
723 : break;
724 : }
725 : }
726 : }
727 :
728 5348 : HIR::Type *impl_type = ASTLoweringType::translate (impl_block.get_type ());
729 5348 : HIR::TypePath *trait_ref
730 5348 : = ASTLowerTypePath::translate (impl_block.get_trait_path ());
731 :
732 5348 : auto crate_num = mappings.get_current_crate ();
733 10696 : Analysis::NodeMapping mapping (crate_num, impl_block.get_node_id (),
734 5348 : mappings.get_next_hir_id (crate_num),
735 5348 : mappings.get_next_localdef_id (crate_num));
736 :
737 5348 : auto impl_items_size = impl_block.get_impl_items ().size ();
738 :
739 10696 : std::vector<std::unique_ptr<HIR::ImplItem>> impl_items;
740 5348 : impl_items.reserve (impl_items_size);
741 5348 : std::vector<HirId> impl_item_ids;
742 5348 : impl_item_ids.reserve (impl_items_size);
743 :
744 11523 : for (auto &impl_item : impl_block.get_impl_items ())
745 : {
746 6175 : if (impl_item->is_marked_for_strip ())
747 0 : continue;
748 :
749 6175 : HIR::ImplItem *lowered
750 6175 : = ASTLowerImplItem::translate (*impl_item, mapping.get_hirid ());
751 6175 : rust_assert (lowered != nullptr);
752 6175 : impl_item_ids.push_back (lowered->get_impl_mappings ().get_hirid ());
753 6175 : impl_items.emplace_back (lowered);
754 : }
755 :
756 5348 : BoundPolarity polarity = impl_block.is_exclam ()
757 5348 : ? BoundPolarity::NegativeBound
758 5341 : : BoundPolarity::RegularBound;
759 5348 : HIR::ImplBlock *hir_impl_block = new HIR::ImplBlock (
760 : mapping, std::move (impl_items), std::move (generic_params),
761 16044 : std::unique_ptr<HIR::Type> (impl_type),
762 10696 : std::unique_ptr<HIR::TypePath> (trait_ref), where_clause, polarity, vis,
763 10696 : impl_block.get_inner_attrs (), impl_block.get_outer_attrs (),
764 10696 : impl_block.get_locus (), unsafe);
765 5348 : translated = hir_impl_block;
766 :
767 5348 : mappings.insert_hir_impl_block (hir_impl_block);
768 :
769 11523 : for (auto &impl_item_id : impl_item_ids)
770 : {
771 6175 : mappings.insert_impl_item_mapping (impl_item_id, hir_impl_block);
772 : }
773 5348 : }
774 :
775 : void
776 1698 : ASTLoweringItem::visit (AST::ExternBlock &extern_block)
777 : {
778 1698 : translated = lower_extern_block (extern_block);
779 1698 : }
780 :
781 : void
782 989 : ASTLoweringItem::visit (AST::MacroRulesDefinition &def)
783 : {
784 989 : lower_macro_definition (def);
785 989 : }
786 :
787 : void
788 40 : ASTLoweringItem::visit (AST::ExternCrate &extern_crate)
789 : {
790 40 : if (extern_crate.references_self ())
791 : return;
792 :
793 40 : auto &mappings = Analysis::Mappings::get ();
794 40 : CrateNum num
795 40 : = mappings.lookup_crate_name (extern_crate.get_referenced_crate ())
796 40 : .value ();
797 40 : AST::Crate &crate = mappings.get_ast_crate (num);
798 :
799 40 : auto saved_crate_num = mappings.get_current_crate ();
800 40 : mappings.set_current_crate (num);
801 40 : auto lowered = ASTLowering::Resolve (crate);
802 40 : mappings.insert_hir_crate (std::move (lowered));
803 32 : mappings.set_current_crate (saved_crate_num);
804 32 : }
805 :
806 : HIR::SimplePath
807 64 : ASTLoweringSimplePath::translate (const AST::SimplePath &path)
808 : {
809 64 : ASTLoweringSimplePath resolver;
810 :
811 64 : return resolver.lower (path);
812 64 : }
813 :
814 : HIR::SimplePathSegment
815 76 : ASTLoweringSimplePath::lower (const AST::SimplePathSegment &segment)
816 : {
817 76 : auto crate_num = mappings.get_current_crate ();
818 76 : auto node_id = segment.get_node_id ();
819 :
820 76 : auto mapping = Analysis::NodeMapping (crate_num, node_id,
821 76 : mappings.get_next_hir_id (crate_num),
822 76 : UNKNOWN_LOCAL_DEFID);
823 :
824 76 : auto hir_seg = HIR::SimplePathSegment (mapping);
825 :
826 76 : mappings.insert_node_to_hir (node_id, mapping.get_hirid ());
827 : // mappings.insert_simple_path_segment (crate_num, node_id, &segment);
828 :
829 76 : return hir_seg;
830 : }
831 :
832 : HIR::SimplePath
833 64 : ASTLoweringSimplePath::lower (const AST::SimplePath &path)
834 : {
835 64 : auto segments = std::vector<HIR::SimplePathSegment> ();
836 140 : for (auto &segment : path.get_segments ())
837 76 : segments.emplace_back (lower (segment));
838 :
839 64 : auto crate_num = mappings.get_current_crate ();
840 64 : auto node_id = path.get_node_id ();
841 :
842 64 : auto mapping = Analysis::NodeMapping (crate_num, node_id,
843 64 : mappings.get_next_hir_id (crate_num),
844 64 : UNKNOWN_LOCAL_DEFID);
845 :
846 64 : auto lowered
847 64 : = HIR::SimplePath (std::move (segments), mapping, path.get_locus ());
848 :
849 64 : mappings.insert_node_to_hir (node_id, mapping.get_hirid ());
850 : // mappings.insert_simple_path (crate_num, node_id, &path);
851 :
852 64 : return lowered;
853 64 : }
854 :
855 : } // namespace HIR
856 : } // namespace Rust
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