mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-29 06:15:01 +01:00
Richard Smith
10a198a9e6
In a `class C(T:! type)`, the type `Self` should be `C(T)`, not merely `C`. Similarly, in an `interface I(T:! type)`, the type of self should be `I(T)`, not merely `I`.
77 lines
2.7 KiB
C++
77 lines
2.7 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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#include "toolchain/check/generic.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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auto StartGenericDecl(Context& /*context*/) -> void {
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// TODO: Start tracking the contents of this declaration.
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}
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auto StartGenericDefinition(Context& /*context*/,
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SemIR::GenericId /*generic_id*/) -> void {
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// TODO: Start tracking the contents of this definition.
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}
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auto FinishGenericDecl(Context& context, SemIR::InstId decl_id)
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-> SemIR::GenericId {
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if (context.scope_stack().compile_time_binding_stack().empty()) {
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return SemIR::GenericId::Invalid;
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}
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auto bindings_id = context.inst_blocks().Add(
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context.scope_stack().compile_time_binding_stack());
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return context.generics().Add(
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SemIR::Generic{.decl_id = decl_id, .bindings_id = bindings_id});
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}
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auto FinishGenericRedecl(Context& /*context*/, SemIR::InstId /*decl_id*/,
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SemIR::GenericId /*generic_id*/) -> void {
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// TODO: Compare contents of this declaration with the existing one on the
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// generic.
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}
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auto FinishGenericDefinition(Context& /*context*/,
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SemIR::GenericId /*generic_id*/) -> void {
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// TODO: Track contents of this generic definition.
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}
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auto MakeGenericInstance(Context& context, SemIR::GenericId generic_id,
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SemIR::InstBlockId args_id)
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-> SemIR::GenericInstanceId {
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auto instance_id = context.generic_instances().GetOrAdd(generic_id, args_id);
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// TODO: Perform substitution into the generic declaration if needed.
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return instance_id;
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}
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auto MakeGenericSelfInstance(Context& context, SemIR::GenericId generic_id)
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-> SemIR::GenericInstanceId {
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// TODO: Remove this once we import generics properly.
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if (!generic_id.is_valid()) {
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return SemIR::GenericInstanceId::Invalid;
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}
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auto& generic = context.generics().Get(generic_id);
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auto args = context.inst_blocks().Get(generic.bindings_id);
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// Form a canonical argument list for the generic.
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llvm::SmallVector<SemIR::InstId> arg_ids;
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arg_ids.reserve(args.size());
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for (auto arg_id : args) {
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arg_ids.push_back(context.constant_values().GetConstantInstId(arg_id));
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}
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auto args_id = context.inst_blocks().AddCanonical(arg_ids);
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// Build a corresponding instance.
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// TODO: This could be made more efficient. We don't need to perform
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// substitution here; we know we want identity mappings for all constants and
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// types. We could also consider not storing the mapping at all in this case.
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return MakeGenericInstance(context, generic_id, args_id);
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}
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} // namespace Carbon::Check
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