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The Aya proof assistant

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// Copyright (c) 2020-2021 Yinsen (Tesla) Zhang.
// Use of this source code is governed by the MIT license that can be found in the LICENSE.md file.
package org.aya.concrete.resolve.context;

import kala.collection.immutable.ImmutableSeq;
import kala.collection.mutable.DynamicSeq;
import kala.collection.mutable.MutableMap;
import org.aya.api.error.Reporter;
import org.aya.api.ref.LocalVar;
import org.aya.api.ref.Var;
import org.aya.util.error.SourcePos;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.nio.file.Path;
import java.util.Objects;

/**
 * Introduces a locally bound variable to the context.
 *
 * @author re-xyr
 */
public record BindContext(
  @NotNull Context parent,
  @NotNull String name,
  @NotNull LocalVar ref
) implements Context {
  @Override public @NotNull Context parent() {
    return parent;
  }

  @Override public @NotNull Reporter reporter() {
    return parent.reporter();
  }

  @Override public @NotNull Path underlyingFile() {
    return parent.underlyingFile();
  }

  @Override public DynamicSeq collect(@NotNull DynamicSeq container) {
    if (container.noneMatch(v -> Objects.equals(v.name(), ref.name()))) container.append(ref);
    return parent.collect(container);
  }

  @Override public @Nullable Var getUnqualifiedLocalMaybe(@NotNull String name, @NotNull SourcePos sourcePos) {
    if (name.equals(this.name)) return ref;
    else return null;
  }

  @Override
  public @Nullable Var getQualifiedLocalMaybe(@NotNull ImmutableSeq<@NotNull String> modName, @NotNull String name, @NotNull SourcePos sourcePos) {
    return null;
  }

  @Override
  public @Nullable MutableMap getModuleLocalMaybe(@NotNull ImmutableSeq modName) {
    return null;
  }
}