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https://github.com/carbon-language/carbon-lang.git
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Dana Jansens
e62678e682
Proposal #5168 defines when a facet type must be identified or complete, and what it means for an interface and a named constraint to be identified or complete. This updates the toolchain to match the requirements. This implements identification of a facet type to require completed named constraints and to include any interfaces from named constraints into the resulting IdentifiedFacetType. To complete a facet type, each interface in the IdentifiedFacetType, and any interface named though a require declaration from them, must be complete.
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_SEM_IR_REQUIRE_IMPLS_H_
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#define CARBON_TOOLCHAIN_SEM_IR_REQUIRE_IMPLS_H_
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#include "toolchain/base/block_value_store.h"
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#include "toolchain/base/canonical_value_store.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::SemIR {
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// An interface requirement from an interface or named constraint, written
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// `require T impls Z`.
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//
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// While this comes from a `require` declaration, it is not an Entity like most
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// other declarations, with a name and parameters, so it does not inherit
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// EntityWithParamsBase.
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struct RequireImpls : Printable<RequireImpls> {
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// The self-type which must implement a given facet type.
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TypeInstId self_id;
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// Evaluates to the `FacetType` that the self-type must implement.
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TypeInstId facet_type_inst_id;
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// The `FacetTypeInfo` derived from the `facet_type_inst_id` instruction.
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FacetTypeId facet_type_id;
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// If the facet type extends `Self`. When true, the `self_id` will be `Self`.
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bool extend_self;
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// The location of the `require` declaration.
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InstId decl_id;
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// The interface or named constraint which contains the `require` declaration.
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NameScopeId parent_scope_id;
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// A `require` declaration is always generic over `Self` since it's inside an
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// interface or named constraint definition.
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GenericId generic_id;
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auto Print(llvm::raw_ostream& out) const -> void {
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out << '{';
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out << "self_id: " << self_id
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<< ", facet_type_inst_id: " << facet_type_inst_id
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<< ", parent_scope: " << parent_scope_id;
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out << '}';
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}
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};
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using RequireImplsStore = ValueStore<RequireImplsId, RequireImpls>;
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using RequireImplsBlockStore =
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BlockValueStore<RequireImplsBlockId, RequireImplsId>;
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} // namespace Carbon::SemIR
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#endif // CARBON_TOOLCHAIN_SEM_IR_REQUIRE_IMPLS_H_
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