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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 24680 : ASTLoweringItem::translate (AST::Item &item)
36 : {
37 24680 : ASTLoweringItem resolver;
38 24680 : item.accept_vis (resolver);
39 :
40 24680 : if (resolver.translated != nullptr)
41 : {
42 23093 : auto id = resolver.translated->get_mappings ().get_hirid ();
43 23093 : auto defid = resolver.translated->get_mappings ().get_defid ();
44 23093 : auto locus = resolver.translated->get_locus ();
45 :
46 23093 : resolver.handle_outer_attributes (*resolver.translated);
47 23093 : resolver.mappings.insert_ast_item (&item);
48 23093 : resolver.mappings.insert_hir_item (resolver.translated);
49 23093 : resolver.mappings.insert_location (id, locus);
50 23093 : resolver.mappings.insert_defid_mapping (defid, resolver.translated);
51 : }
52 :
53 24680 : return resolver.translated;
54 24680 : }
55 :
56 : void
57 1188 : ASTLoweringItem::visit (AST::Module &module)
58 : {
59 1188 : auto crate_num = mappings.get_current_crate ();
60 2376 : Analysis::NodeMapping mapping (crate_num, module.get_node_id (),
61 1188 : mappings.get_next_hir_id (crate_num),
62 1188 : mappings.get_next_localdef_id (crate_num));
63 :
64 : // should be lowered from module.get_vis()
65 1188 : HIR::Visibility vis = translate_visibility (module.get_visibility ());
66 :
67 1188 : auto items = std::vector<std::unique_ptr<Item>> ();
68 :
69 5487 : for (auto &item : module.get_items ())
70 : {
71 4299 : 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 4299 : if (transitem)
75 3832 : items.emplace_back (transitem);
76 : }
77 :
78 : // should be lowered/copied from module.get_in/outer_attrs()
79 1188 : AST::AttrVec inner_attrs = module.get_inner_attrs ();
80 1188 : AST::AttrVec outer_attrs = module.get_outer_attrs ();
81 :
82 1188 : translated
83 1188 : = new HIR::Module (mapping, module.get_name (), module.get_locus (),
84 : std::move (items), std::move (vis),
85 2376 : std::move (inner_attrs), std::move (outer_attrs));
86 1188 : mappings.insert_module (static_cast<Module *> (translated));
87 1188 : }
88 :
89 : void
90 70 : ASTLoweringItem::visit (AST::TypeAlias &alias)
91 : {
92 70 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
93 70 : where_clause_items.reserve (alias.get_where_clause ().get_items ().size ());
94 :
95 70 : for (auto &item : alias.get_where_clause ().get_items ())
96 0 : where_clause_items.emplace_back (
97 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
98 :
99 70 : HIR::WhereClause where_clause (std::move (where_clause_items));
100 70 : HIR::Visibility vis = translate_visibility (alias.get_visibility ());
101 :
102 70 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
103 70 : if (alias.has_generics ())
104 9 : generic_params = lower_generic_params (alias.get_generic_params ());
105 :
106 70 : HIR::Type *existing_type
107 70 : = ASTLoweringType::translate (alias.get_type_aliased ());
108 :
109 70 : auto crate_num = mappings.get_current_crate ();
110 70 : Analysis::NodeMapping mapping (crate_num, alias.get_node_id (),
111 70 : mappings.get_next_hir_id (crate_num),
112 70 : mappings.get_next_localdef_id (crate_num));
113 :
114 70 : translated
115 70 : = new HIR::TypeAlias (mapping, alias.get_new_type_name (),
116 : std::move (generic_params), std::move (where_clause),
117 140 : std::unique_ptr<HIR::Type> (existing_type),
118 70 : std::move (vis), alias.get_outer_attrs (),
119 210 : alias.get_locus ());
120 70 : }
121 :
122 : void
123 965 : ASTLoweringItem::visit (AST::TupleStruct &struct_decl)
124 : {
125 965 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
126 965 : if (struct_decl.has_generics ())
127 : {
128 299 : generic_params = lower_generic_params (struct_decl.get_generic_params ());
129 : }
130 :
131 965 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
132 965 : where_clause_items.reserve (
133 965 : struct_decl.get_where_clause ().get_items ().size ());
134 :
135 965 : for (auto &item : struct_decl.get_where_clause ().get_items ())
136 0 : where_clause_items.emplace_back (
137 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
138 :
139 965 : HIR::WhereClause where_clause (std::move (where_clause_items));
140 965 : HIR::Visibility vis = translate_visibility (struct_decl.get_visibility ());
141 :
142 965 : std::vector<HIR::TupleField> fields;
143 965 : fields.reserve (struct_decl.get_fields ().size ());
144 :
145 2598 : for (AST::TupleField &field : struct_decl.get_fields ())
146 : {
147 1633 : if (field.get_field_type ().is_marked_for_strip ())
148 0 : continue;
149 :
150 : // FIXME: How do we get the visibility from here?
151 1633 : HIR::Visibility vis = translate_visibility (field.get_visibility ());
152 1633 : HIR::Type *type = ASTLoweringType::translate (field.get_field_type ());
153 :
154 1633 : auto crate_num = mappings.get_current_crate ();
155 1633 : Analysis::NodeMapping mapping (crate_num, field.get_node_id (),
156 1633 : mappings.get_next_hir_id (crate_num),
157 1633 : mappings.get_next_localdef_id (crate_num));
158 :
159 1633 : fields.emplace_back (mapping, std::unique_ptr<HIR::Type> (type), vis,
160 3266 : field.get_locus (), field.get_outer_attrs ());
161 1633 : }
162 :
163 965 : auto crate_num = mappings.get_current_crate ();
164 1930 : Analysis::NodeMapping mapping (crate_num, struct_decl.get_node_id (),
165 965 : mappings.get_next_hir_id (crate_num),
166 965 : mappings.get_next_localdef_id (crate_num));
167 :
168 1930 : translated = new HIR::TupleStruct (mapping, std::move (fields),
169 965 : struct_decl.get_identifier (),
170 : std::move (generic_params),
171 : std::move (where_clause), vis,
172 965 : struct_decl.get_outer_attrs (),
173 965 : struct_decl.get_locus ());
174 965 : }
175 :
176 : void
177 1609 : ASTLoweringItem::visit (AST::StructStruct &struct_decl)
178 : {
179 1609 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
180 1609 : if (struct_decl.has_generics ())
181 : {
182 494 : generic_params = lower_generic_params (struct_decl.get_generic_params ());
183 : }
184 :
185 1609 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
186 1609 : where_clause_items.reserve (
187 1609 : struct_decl.get_where_clause ().get_items ().size ());
188 :
189 1613 : for (auto &item : struct_decl.get_where_clause ().get_items ())
190 4 : where_clause_items.emplace_back (
191 4 : ASTLowerWhereClauseItem::translate (*item.get ()));
192 :
193 1609 : HIR::WhereClause where_clause (std::move (where_clause_items));
194 :
195 1609 : HIR::Visibility vis = translate_visibility (struct_decl.get_visibility ());
196 :
197 1609 : bool is_unit = struct_decl.is_unit_struct ();
198 1609 : std::vector<HIR::StructField> fields;
199 3514 : for (AST::StructField &field : struct_decl.get_fields ())
200 : {
201 1905 : if (field.get_field_type ().is_marked_for_strip ())
202 4 : continue;
203 :
204 1905 : HIR::Visibility vis = translate_visibility (field.get_visibility ());
205 1905 : HIR::Type *type = ASTLoweringType::translate (field.get_field_type ());
206 :
207 1905 : auto crate_num = mappings.get_current_crate ();
208 1905 : Analysis::NodeMapping mapping (crate_num, field.get_node_id (),
209 1905 : mappings.get_next_hir_id (crate_num),
210 1905 : mappings.get_next_localdef_id (crate_num));
211 :
212 1905 : HIR::StructField translated_field (mapping, field.get_field_name (),
213 3810 : std::unique_ptr<HIR::Type> (type), vis,
214 : field.get_locus (),
215 3810 : field.get_outer_attrs ());
216 :
217 1905 : if (struct_field_name_exists (fields, translated_field))
218 4 : continue;
219 :
220 1901 : fields.push_back (std::move (translated_field));
221 1905 : }
222 :
223 1609 : auto crate_num = mappings.get_current_crate ();
224 3218 : Analysis::NodeMapping mapping (crate_num, struct_decl.get_node_id (),
225 1609 : mappings.get_next_hir_id (crate_num),
226 1609 : mappings.get_next_localdef_id (crate_num));
227 :
228 3218 : translated = new HIR::StructStruct (mapping, std::move (fields),
229 1609 : struct_decl.get_identifier (),
230 : std::move (generic_params),
231 : std::move (where_clause), is_unit, vis,
232 1609 : struct_decl.get_outer_attrs (),
233 1609 : struct_decl.get_locus ());
234 1609 : }
235 :
236 : void
237 544 : ASTLoweringItem::visit (AST::Enum &enum_decl)
238 : {
239 544 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
240 544 : if (enum_decl.has_generics ())
241 : {
242 228 : generic_params = lower_generic_params (enum_decl.get_generic_params ());
243 : }
244 :
245 544 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
246 544 : where_clause_items.reserve (
247 544 : enum_decl.get_where_clause ().get_items ().size ());
248 :
249 544 : for (auto &item : enum_decl.get_where_clause ().get_items ())
250 0 : where_clause_items.emplace_back (
251 0 : ASTLowerWhereClauseItem::translate (*item.get ()));
252 :
253 544 : HIR::WhereClause where_clause (std::move (where_clause_items));
254 544 : HIR::Visibility vis = translate_visibility (enum_decl.get_visibility ());
255 :
256 : // bool is_unit = enum_decl.is_zero_variant ();
257 544 : std::vector<std::unique_ptr<HIR::EnumItem>> items;
258 544 : items.reserve (enum_decl.get_variants ().size ());
259 :
260 1808 : for (auto &variant : enum_decl.get_variants ())
261 : {
262 1264 : if (variant->is_marked_for_strip ())
263 0 : continue;
264 :
265 1264 : items.emplace_back (ASTLoweringEnumItem::translate (variant.get ()));
266 : }
267 :
268 544 : auto crate_num = mappings.get_current_crate ();
269 1088 : Analysis::NodeMapping mapping (crate_num, enum_decl.get_node_id (),
270 544 : mappings.get_next_hir_id (crate_num),
271 544 : mappings.get_next_localdef_id (crate_num));
272 :
273 544 : HIR::Enum *hir_enum
274 544 : = new HIR::Enum (mapping, enum_decl.get_identifier (), vis,
275 : std::move (generic_params), std::move (where_clause),
276 544 : std::move (items), enum_decl.get_outer_attrs (),
277 1088 : enum_decl.get_locus ());
278 544 : translated = hir_enum;
279 1808 : for (auto &variant : hir_enum->get_variants ())
280 : {
281 1264 : mappings.insert_hir_enumitem (hir_enum, variant.get ());
282 : }
283 544 : }
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 54 : ASTLoweringItem::visit (AST::StaticItem &var)
343 : {
344 54 : HIR::Visibility vis = translate_visibility (var.get_visibility ());
345 :
346 54 : HIR::Type *type = ASTLoweringType::translate (var.get_type (), true);
347 54 : HIR::Expr *expr = ASTLoweringExpr::translate (var.get_expr ());
348 :
349 54 : auto crate_num = mappings.get_current_crate ();
350 108 : Analysis::NodeMapping mapping (crate_num, var.get_node_id (),
351 54 : mappings.get_next_hir_id (crate_num),
352 54 : mappings.get_next_localdef_id (crate_num));
353 :
354 54 : translated = new HIR::StaticItem (mapping, var.get_identifier (),
355 54 : var.is_mutable () ? Mutability::Mut
356 : : Mutability::Imm,
357 54 : std::unique_ptr<HIR::Type> (type),
358 108 : std::unique_ptr<HIR::Expr> (expr), vis,
359 162 : var.get_outer_attrs (), var.get_locus ());
360 54 : }
361 :
362 : void
363 470 : ASTLoweringItem::visit (AST::ConstantItem &constant)
364 : {
365 470 : HIR::Visibility vis = translate_visibility (constant.get_visibility ());
366 :
367 470 : HIR::Type *type = ASTLoweringType::translate (constant.get_type (), true);
368 470 : HIR::Expr *expr = nullptr;
369 470 : if (constant.has_expr ())
370 469 : expr = ASTLoweringExpr::translate (constant.get_expr ());
371 :
372 470 : auto crate_num = mappings.get_current_crate ();
373 470 : Analysis::NodeMapping mapping (crate_num, constant.get_node_id (),
374 470 : mappings.get_next_hir_id (crate_num),
375 470 : mappings.get_next_localdef_id (crate_num));
376 :
377 470 : translated = new HIR::ConstantItem (mapping, constant.get_identifier (), vis,
378 1410 : std::unique_ptr<HIR::Type> (type),
379 940 : std::unique_ptr<HIR::Expr> (expr),
380 470 : constant.get_outer_attrs (),
381 1410 : constant.get_locus ());
382 470 : }
383 :
384 : void
385 6746 : ASTLoweringItem::visit (AST::Function &function)
386 : {
387 6746 : if (function.is_marked_for_strip ())
388 0 : return;
389 :
390 6746 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
391 6746 : where_clause_items.reserve (
392 6746 : function.get_where_clause ().get_items ().size ());
393 :
394 6795 : for (auto &item : function.get_where_clause ().get_items ())
395 49 : where_clause_items.emplace_back (
396 49 : ASTLowerWhereClauseItem::translate (*item.get ()));
397 :
398 6746 : HIR::WhereClause where_clause (std::move (where_clause_items));
399 6746 : HIR::FunctionQualifiers qualifiers
400 6746 : = lower_qualifiers (function.get_qualifiers ());
401 6746 : HIR::Visibility vis = translate_visibility (function.get_visibility ());
402 :
403 : // need
404 6746 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
405 6746 : if (function.has_generics ())
406 : {
407 609 : generic_params = lower_generic_params (function.get_generic_params ());
408 : }
409 6746 : Identifier function_name = function.get_function_name ();
410 6746 : location_t locus = function.get_locus ();
411 :
412 6746 : std::unique_ptr<HIR::Type> return_type
413 6746 : = function.has_return_type () ? std::unique_ptr<HIR::Type> (
414 : ASTLoweringType::translate (function.get_return_type (), false,
415 : true /* impl trait is allowed here*/))
416 6746 : : nullptr;
417 :
418 6746 : std::vector<HIR::FunctionParam> function_params;
419 6746 : function_params.reserve (function.get_function_params ().size ());
420 :
421 6746 : auto crate_num = mappings.get_current_crate ();
422 8746 : for (auto &p : function.get_function_params ())
423 : {
424 2000 : if (p->is_variadic ())
425 3 : continue;
426 2000 : if (p->is_self ())
427 : {
428 1 : rich_location r (line_table, p->get_locus ());
429 1 : r.add_range (function.get_locus ());
430 1 : 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 1 : continue;
452 1 : }
453 :
454 1999 : auto ¶m = static_cast<AST::FunctionParam &> (*p);
455 :
456 1999 : auto translated_pattern = std::unique_ptr<HIR::Pattern> (
457 1999 : ASTLoweringPattern::translate (param.get_pattern ()));
458 :
459 1999 : 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 1997 : default:
466 : // defer checking for when we have type information after lowering
467 1997 : break;
468 : }
469 :
470 1997 : auto translated_type = std::unique_ptr<HIR::Type> (
471 1997 : ASTLoweringType::translate (param.get_type ()));
472 :
473 1997 : auto crate_num = mappings.get_current_crate ();
474 1997 : Analysis::NodeMapping mapping (crate_num, param.get_node_id (),
475 1997 : mappings.get_next_hir_id (crate_num),
476 1997 : UNKNOWN_LOCAL_DEFID);
477 :
478 1997 : function_params.emplace_back (mapping, std::move (translated_pattern),
479 : std::move (translated_type),
480 1997 : param.get_locus ());
481 1999 : }
482 :
483 6746 : bool terminated = false;
484 6746 : std::unique_ptr<HIR::BlockExpr> function_body
485 : = std::unique_ptr<HIR::BlockExpr> (
486 6746 : ASTLoweringBlock::translate (*function.get_definition ().value (),
487 6746 : &terminated));
488 :
489 13492 : Analysis::NodeMapping mapping (crate_num, function.get_node_id (),
490 6746 : mappings.get_next_hir_id (crate_num),
491 6746 : mappings.get_next_localdef_id (crate_num));
492 :
493 6746 : mappings.insert_location (function_body->get_mappings ().get_hirid (),
494 : function.get_locus ());
495 :
496 6746 : Defaultness defaultness
497 6746 : = function.is_default () ? Defaultness::Default : Defaultness::Final;
498 :
499 6746 : 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 6746 : std::move (vis), function.get_outer_attrs (),
505 6746 : tl::nullopt, defaultness, locus);
506 :
507 : // add the mappings for the function params at the end
508 8743 : for (auto ¶m : fn->get_function_params ())
509 : {
510 1997 : mappings.insert_hir_param (¶m);
511 1997 : mappings.insert_location (mapping.get_hirid (), param.get_locus ());
512 : }
513 :
514 6746 : translated = fn;
515 6746 : }
516 :
517 : void
518 979 : ASTLoweringItem::visit (AST::InherentImpl &impl_block)
519 : {
520 979 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
521 979 : where_clause_items.reserve (
522 979 : impl_block.get_where_clause ().get_items ().size ());
523 :
524 979 : for (auto &item : impl_block.get_where_clause ().get_items ())
525 0 : where_clause_items.emplace_back (
526 0 : ASTLowerWhereClauseItem::translate (*item));
527 :
528 979 : HIR::WhereClause where_clause (std::move (where_clause_items));
529 979 : HIR::Visibility vis = translate_visibility (impl_block.get_visibility ());
530 :
531 979 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
532 979 : if (impl_block.has_generics ())
533 : {
534 338 : generic_params = lower_generic_params (impl_block.get_generic_params ());
535 :
536 677 : for (auto &generic_param : generic_params)
537 : {
538 339 : switch (generic_param->get_kind ())
539 : {
540 311 : case HIR::GenericParam::GenericKind::TYPE:
541 311 : {
542 311 : const HIR::TypeParam &t
543 311 : = static_cast<const HIR::TypeParam &> (*generic_param);
544 :
545 311 : 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 :
566 979 : HIR::Type *impl_type = ASTLoweringType::translate (impl_block.get_type ());
567 :
568 979 : auto crate_num = mappings.get_current_crate ();
569 1958 : Analysis::NodeMapping mapping (crate_num, impl_block.get_node_id (),
570 979 : mappings.get_next_hir_id (crate_num),
571 979 : mappings.get_next_localdef_id (crate_num));
572 :
573 1958 : std::vector<std::unique_ptr<HIR::ImplItem>> impl_items;
574 979 : std::vector<HirId> impl_item_ids;
575 3762 : for (auto &impl_item : impl_block.get_impl_items ())
576 : {
577 2783 : if (impl_item->is_marked_for_strip ())
578 0 : continue;
579 :
580 2783 : HIR::ImplItem *lowered
581 2783 : = ASTLowerImplItem::translate (*impl_item, mapping.get_hirid ());
582 2783 : rust_assert (lowered != nullptr);
583 2783 : impl_items.emplace_back (lowered);
584 2783 : impl_item_ids.push_back (lowered->get_impl_mappings ().get_hirid ());
585 : }
586 :
587 979 : BoundPolarity polarity = BoundPolarity::RegularBound;
588 979 : HIR::ImplBlock *hir_impl_block = new HIR::ImplBlock (
589 : mapping, std::move (impl_items), std::move (generic_params),
590 979 : std::unique_ptr<HIR::Type> (impl_type), nullptr, where_clause, polarity,
591 1958 : vis, impl_block.get_inner_attrs (), impl_block.get_outer_attrs (),
592 979 : impl_block.get_locus (), false);
593 979 : translated = hir_impl_block;
594 :
595 979 : mappings.insert_hir_impl_block (hir_impl_block);
596 3762 : for (auto &impl_item_id : impl_item_ids)
597 : {
598 2783 : mappings.insert_impl_item_mapping (impl_item_id, hir_impl_block);
599 : }
600 979 : }
601 :
602 : void
603 3963 : ASTLoweringItem::visit (AST::Trait &trait)
604 : {
605 3963 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
606 3963 : where_clause_items.reserve (trait.get_where_clause ().get_items ().size ());
607 :
608 3970 : for (auto &item : trait.get_where_clause ().get_items ())
609 7 : where_clause_items.emplace_back (
610 7 : ASTLowerWhereClauseItem::translate (*item.get ()));
611 :
612 3963 : HIR::WhereClause where_clause (std::move (where_clause_items));
613 :
614 3963 : HIR::Visibility vis = translate_visibility (trait.get_visibility ());
615 :
616 3963 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
617 3963 : if (trait.has_generics ())
618 : {
619 631 : 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 3963 : HIR::GenericParam *self_param
625 3963 : = ASTLowerGenericParam::translate (trait.get_implicit_self ());
626 3963 : generic_params.emplace (generic_params.begin (), self_param);
627 :
628 3963 : std::vector<std::unique_ptr<HIR::TypeParamBound>> type_param_bounds;
629 3963 : if (trait.has_type_param_bounds ())
630 : {
631 1143 : for (auto &bound : trait.get_type_param_bounds ())
632 608 : type_param_bounds.emplace_back (lower_bound (*bound));
633 : }
634 :
635 3963 : auto trait_item_size = trait.get_trait_items ().size ();
636 :
637 3963 : std::vector<std::unique_ptr<HIR::TraitItem>> trait_items;
638 3963 : trait_items.reserve (trait_item_size);
639 3963 : std::vector<HirId> trait_item_ids;
640 3963 : trait_item_ids.reserve (trait_item_size);
641 :
642 7338 : for (auto &item : trait.get_trait_items ())
643 : {
644 3375 : if (item->is_marked_for_strip ())
645 0 : continue;
646 :
647 3375 : HIR::TraitItem *lowered = ASTLowerTraitItem::translate (*item);
648 3375 : trait_item_ids.push_back (lowered->get_mappings ().get_hirid ());
649 3375 : trait_items.emplace_back (lowered);
650 : }
651 :
652 3963 : auto crate_num = mappings.get_current_crate ();
653 7926 : Analysis::NodeMapping mapping (crate_num, trait.get_node_id (),
654 3963 : mappings.get_next_hir_id (crate_num),
655 3963 : mappings.get_next_localdef_id (crate_num));
656 :
657 3963 : auto trait_unsafety
658 3963 : = trait.is_unsafe () ? Unsafety::Unsafe : Unsafety::Normal;
659 :
660 3963 : HIR::Trait *hir_trait
661 7926 : = 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 3963 : trait.get_outer_attrs (), trait.get_locus ());
665 :
666 3963 : if (trait.is_auto ())
667 12 : mappings.insert_auto_trait (hir_trait);
668 :
669 3963 : translated = hir_trait;
670 :
671 7338 : for (auto trait_item_id : trait_item_ids)
672 : {
673 3375 : mappings.insert_trait_item_mapping (trait_item_id, hir_trait);
674 : }
675 3963 : }
676 :
677 : void
678 4740 : ASTLoweringItem::visit (AST::TraitImpl &impl_block)
679 : {
680 4740 : bool unsafe = impl_block.is_unsafe ();
681 :
682 4740 : std::vector<std::unique_ptr<HIR::WhereClauseItem>> where_clause_items;
683 4740 : where_clause_items.reserve (
684 4740 : impl_block.get_where_clause ().get_items ().size ());
685 :
686 4824 : for (auto &item : impl_block.get_where_clause ().get_items ())
687 84 : where_clause_items.emplace_back (
688 84 : ASTLowerWhereClauseItem::translate (*item));
689 :
690 4740 : HIR::WhereClause where_clause (std::move (where_clause_items));
691 4740 : HIR::Visibility vis = translate_visibility (impl_block.get_visibility ());
692 :
693 4740 : std::vector<std::unique_ptr<HIR::GenericParam>> generic_params;
694 4740 : if (impl_block.has_generics ())
695 : {
696 654 : generic_params = lower_generic_params (impl_block.get_generic_params ());
697 :
698 1419 : for (auto &generic_param : generic_params)
699 : {
700 765 : switch (generic_param->get_kind ())
701 : {
702 686 : case HIR::GenericParam::GenericKind::TYPE:
703 686 : {
704 686 : const HIR::TypeParam &t
705 686 : = static_cast<const HIR::TypeParam &> (*generic_param);
706 :
707 686 : 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 4740 : HIR::Type *impl_type = ASTLoweringType::translate (impl_block.get_type ());
729 4740 : HIR::TypePath *trait_ref
730 4740 : = ASTLowerTypePath::translate (impl_block.get_trait_path ());
731 :
732 4740 : auto crate_num = mappings.get_current_crate ();
733 9480 : Analysis::NodeMapping mapping (crate_num, impl_block.get_node_id (),
734 4740 : mappings.get_next_hir_id (crate_num),
735 4740 : mappings.get_next_localdef_id (crate_num));
736 :
737 4740 : auto impl_items_size = impl_block.get_impl_items ().size ();
738 :
739 9480 : std::vector<std::unique_ptr<HIR::ImplItem>> impl_items;
740 4740 : impl_items.reserve (impl_items_size);
741 4740 : std::vector<HirId> impl_item_ids;
742 4740 : impl_item_ids.reserve (impl_items_size);
743 :
744 10170 : for (auto &impl_item : impl_block.get_impl_items ())
745 : {
746 5430 : if (impl_item->is_marked_for_strip ())
747 0 : continue;
748 :
749 5430 : HIR::ImplItem *lowered
750 5430 : = ASTLowerImplItem::translate (*impl_item, mapping.get_hirid ());
751 5430 : rust_assert (lowered != nullptr);
752 5430 : impl_item_ids.push_back (lowered->get_impl_mappings ().get_hirid ());
753 5430 : impl_items.emplace_back (lowered);
754 : }
755 :
756 4740 : BoundPolarity polarity = impl_block.is_exclam ()
757 4740 : ? BoundPolarity::NegativeBound
758 4735 : : BoundPolarity::RegularBound;
759 4740 : HIR::ImplBlock *hir_impl_block = new HIR::ImplBlock (
760 : mapping, std::move (impl_items), std::move (generic_params),
761 14220 : std::unique_ptr<HIR::Type> (impl_type),
762 9480 : std::unique_ptr<HIR::TypePath> (trait_ref), where_clause, polarity, vis,
763 9480 : impl_block.get_inner_attrs (), impl_block.get_outer_attrs (),
764 9480 : impl_block.get_locus (), unsafe);
765 4740 : translated = hir_impl_block;
766 :
767 4740 : mappings.insert_hir_impl_block (hir_impl_block);
768 10170 : for (auto &impl_item_id : impl_item_ids)
769 : {
770 5430 : mappings.insert_impl_item_mapping (impl_item_id, hir_impl_block);
771 : }
772 4740 : }
773 :
774 : void
775 1658 : ASTLoweringItem::visit (AST::ExternBlock &extern_block)
776 : {
777 1658 : translated = lower_extern_block (extern_block);
778 1658 : }
779 :
780 : void
781 901 : ASTLoweringItem::visit (AST::MacroRulesDefinition &def)
782 : {
783 901 : lower_macro_definition (def);
784 901 : }
785 :
786 : void
787 24 : ASTLoweringItem::visit (AST::ExternCrate &extern_crate)
788 : {
789 24 : if (extern_crate.references_self ())
790 : return;
791 :
792 24 : auto &mappings = Analysis::Mappings::get ();
793 24 : CrateNum num
794 24 : = mappings.lookup_crate_name (extern_crate.get_referenced_crate ())
795 24 : .value ();
796 24 : AST::Crate &crate = mappings.get_ast_crate (num);
797 :
798 24 : auto saved_crate_num = mappings.get_current_crate ();
799 24 : mappings.set_current_crate (num);
800 24 : auto lowered = ASTLowering::Resolve (crate);
801 24 : mappings.insert_hir_crate (std::move (lowered));
802 24 : mappings.set_current_crate (saved_crate_num);
803 24 : }
804 :
805 : HIR::SimplePath
806 63 : ASTLoweringSimplePath::translate (const AST::SimplePath &path)
807 : {
808 63 : ASTLoweringSimplePath resolver;
809 :
810 63 : return resolver.lower (path);
811 63 : }
812 :
813 : HIR::SimplePathSegment
814 75 : ASTLoweringSimplePath::lower (const AST::SimplePathSegment &segment)
815 : {
816 75 : auto crate_num = mappings.get_current_crate ();
817 75 : auto node_id = segment.get_node_id ();
818 :
819 75 : auto mapping = Analysis::NodeMapping (crate_num, node_id,
820 75 : mappings.get_next_hir_id (crate_num),
821 75 : UNKNOWN_LOCAL_DEFID);
822 :
823 75 : auto hir_seg = HIR::SimplePathSegment (mapping);
824 :
825 75 : mappings.insert_node_to_hir (node_id, mapping.get_hirid ());
826 : // mappings.insert_simple_path_segment (crate_num, node_id, &segment);
827 :
828 75 : return hir_seg;
829 : }
830 :
831 : HIR::SimplePath
832 63 : ASTLoweringSimplePath::lower (const AST::SimplePath &path)
833 : {
834 63 : auto segments = std::vector<HIR::SimplePathSegment> ();
835 138 : for (auto &segment : path.get_segments ())
836 75 : segments.emplace_back (lower (segment));
837 :
838 63 : auto crate_num = mappings.get_current_crate ();
839 63 : auto node_id = path.get_node_id ();
840 :
841 63 : auto mapping = Analysis::NodeMapping (crate_num, node_id,
842 63 : mappings.get_next_hir_id (crate_num),
843 63 : UNKNOWN_LOCAL_DEFID);
844 :
845 63 : auto lowered
846 63 : = HIR::SimplePath (std::move (segments), mapping, path.get_locus ());
847 :
848 63 : mappings.insert_node_to_hir (node_id, mapping.get_hirid ());
849 : // mappings.insert_simple_path (crate_num, node_id, &path);
850 :
851 63 : return lowered;
852 63 : }
853 :
854 : } // namespace HIR
855 : } // namespace Rust
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