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50 lines
1.7 KiB
C++
50 lines
1.7 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 "explorer/ast/bindings.h"
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#include "common/error.h"
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#include "explorer/ast/impl_binding.h"
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#include "explorer/ast/pattern.h"
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namespace Carbon {
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void Bindings::Add(Nonnull<const GenericBinding*> binding,
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Nonnull<const Value*> value,
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std::optional<Nonnull<const Value*>> witness) {
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bool added_value = args_.insert({binding, value}).second;
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CARBON_CHECK(added_value) << "Add of already-existing binding";
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if (witness) {
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// TODO: Eventually we should check that we have a witness if and only if
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// the binding has an impl binding.
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auto impl_binding = binding->impl_binding();
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CARBON_CHECK(impl_binding) << "Given witness but have no impl binding";
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bool added_witness = witnesses_.insert({*impl_binding, *witness}).second;
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CARBON_CHECK(added_witness) << "Add of already-existing binding";
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}
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}
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auto Bindings::None() -> Nonnull<const Bindings*> {
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static Nonnull<const Bindings*> bindings = new Bindings;
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return bindings;
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}
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auto Bindings::SymbolicIdentity(
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Nonnull<Arena*> arena,
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llvm::ArrayRef<Nonnull<const GenericBinding*>> bindings)
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-> Nonnull<const Bindings*> {
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auto* result = arena->New<Bindings>();
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for (const auto* binding : bindings) {
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std::optional<Nonnull<const Value*>> witness;
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if (binding->impl_binding()) {
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witness = *binding->impl_binding().value()->symbolic_identity();
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}
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result->Add(binding, *binding->symbolic_identity(), witness);
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}
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return result;
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}
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} // namespace Carbon
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