mirror of
https://github.com/carbon-language/carbon-lang.git
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Dana JansensandRichard Smith
0e8d354567
This allows us to import the table for a given impl only once, while we can import many ImplWitness instructions with different specifics for a generic impl. For example in convert_facet_value_to_narrowed_facet_type.carbon we see that a single witness table is imported for the BitAnd interface, with multiple witnesses (for different specifics) imported and sharing the same table. The ImplWitnessTable now contains a back-link to the Impl the witness is for, allowing inst namer to name that interface in the textual semir, and allowing the interface to be found when debugging from a witness. --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
40 lines
1.5 KiB
C++
40 lines
1.5 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_CHECK_IMPL_H_
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#define CARBON_TOOLCHAIN_CHECK_IMPL_H_
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#include "toolchain/check/context.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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// Returns the initial witness value for a new `impl` declaration.
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//
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// `has_definition` is whether this declaration is immediately followed by the
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// opening of the definition.
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auto ImplWitnessForDeclaration(Context& context, const SemIR::Impl& impl,
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bool has_definition) -> SemIR::InstId;
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// Update `impl`'s witness at the start of a definition.
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auto ImplWitnessStartDefinition(Context& context, SemIR::Impl& impl) -> void;
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// Adds the function members to the witness for `impl`.
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auto FinishImplWitness(Context& context, SemIR::Impl& impl) -> void;
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// Sets all unset members of the witness for `impl` to the error instruction.
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auto FillImplWitnessWithErrors(Context& context, SemIR::Impl& impl) -> void;
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// Sets the `ImplId` in the `ImplWitnessTable`.
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auto AssignImplIdInWitness(Context& context, SemIR::ImplId impl_id,
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SemIR::InstId witness_id) -> void;
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// Returns whether the impl is either `final` explicitly, or implicitly due to
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// being concrete.
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auto IsImplEffectivelyFinal(Context& context, const SemIR::Impl& impl) -> bool;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_IMPL_H_
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