// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package dev.cel.common.types;

import com.google.auto.value.AutoValue;
import com.google.errorprone.annotations.CheckReturnValue;
import com.google.errorprone.annotations.Immutable;
import java.util.function.Function;

/** Type parameters are 'free' types which take on a concrete type contextually. */
@AutoValue
@CheckReturnValue
@Immutable
public abstract class TypeParamType extends CelType {

  @Override
  public abstract CelKind kind();

  @Override
  public abstract String name();

  @Override
  public CelType withFreshTypeParamVariables(Function<String, String> varNameGenerator) {
    return create(varNameGenerator.apply(name()));
  }

  public static TypeParamType create(String name) {
    return new AutoValue_TypeParamType(CelKind.TYPE_PARAM, name);
  }
}
