/*
 * Copyright 2016 Miroslav Janíček
 *
 * 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
 *
 *     http://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 org.classdump.luna.compiler.analysis;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.classdump.luna.compiler.FunctionId;
import org.classdump.luna.compiler.ir.Closure;
import org.classdump.luna.compiler.ir.CodeVisitor;

class NestedRefVisitor extends CodeVisitor {

  private final Set<FunctionId> ids;

  public NestedRefVisitor() {
    this.ids = new HashSet<>();
  }

  public DependencyInfo dependencyInfo() {
    return new DependencyInfo(Collections.unmodifiableSet(new HashSet<>(ids)));
  }

  @Override
  public void visit(Closure node) {
    ids.add(node.id());
  }

}
