// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package scala.tools.asm.tree;

import java.util.Map;
import scala.tools.asm.MethodVisitor;

/**
 * A node that represents a line number declaration. These nodes are pseudo instruction nodes in
 * order to be inserted in an instruction list.
 *
 * @author Eric Bruneton
 */
public class LineNumberNode extends AbstractInsnNode {

  /** A line number. This number refers to the source file from which the class was compiled. */
  public int line;

  /** The first instruction corresponding to this line number. */
  public LabelNode start;

  /**
   * Constructs a new {@link LineNumberNode}.
   *
   * @param line a line number. This number refers to the source file from which the class was
   *     compiled.
   * @param start the first instruction corresponding to this line number.
   */
  public LineNumberNode(final int line, final LabelNode start) {
    super(-1);
    this.line = line;
    this.start = start;
  }

  @Override
  public int getType() {
    return LINE;
  }

  @Override
  public void accept(final MethodVisitor methodVisitor) {
    methodVisitor.visitLineNumber(line, start.getLabel());
  }

  @Override
  public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
    return new LineNumberNode(line, clone(start, clonedLabels));
  }
}
