/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000,2002,2003 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
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.objectweb.asm.tree;

import org.objectweb.asm.CodeVisitor;

/**
 * A node that represents a zero operand instruction.
 * 
 * @author Eric Bruneton
 */

public class InsnNode extends AbstractInsnNode {

  /**
   * Constructs a new {@link InsnNode InsnNode} object.
   *
   * @param opcode the opcode of the instruction to be constructed. This opcode
   *      must be NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
   *      ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
   *      FCONST_2, DCONST_0, DCONST_1,
   *
   *      IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
   *      IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
   *      SASTORE,
   *
   *      POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
   *
   *      IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
   *      DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
   *      FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
   *      LOR, IXOR, LXOR,
   *
   *      I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
   *      I2S,
   *
   *      LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
   *
   *      IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
   *
   *      ARRAYLENGTH,
   *
   *      ATHROW,
   *
   *      MONITORENTER, or MONITOREXIT.
   */

  public InsnNode (final int opcode) {
    super(opcode);
  }

  /**
   * Sets the opcode of this instruction.
   *
   * @param opcode the new instruction opcode. This opcode must be NOP,
   *      ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2,
   *      ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1,
   *      FCONST_2, DCONST_0, DCONST_1,
   *
   *      IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD,
   *      IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE,
   *      SASTORE,
   *
   *      POP, POP2, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP,
   *
   *      IADD, LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL,
   *      DMUL, IDIV, LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG,
   *      FNEG, DNEG, ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR,
   *      LOR, IXOR, LXOR,
   *
   *      I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F, I2B, I2C,
   *      I2S,
   *
   *      LCMP, FCMPL, FCMPG, DCMPL, DCMPG,
   *
   *      IRETURN, LRETURN, FRETURN, DRETURN, ARETURN, RETURN,
   *
   *      ARRAYLENGTH,
   *
   *      ATHROW,
   *
   *      MONITORENTER, or MONITOREXIT.
   */

  public void setOpcode (final int opcode) {
    this.opcode = opcode;
  }

  /**
   * Makes the given code visitor visit this instruction.
   * 
   * @param cv a code visitor. 
   */

  public void accept (final CodeVisitor cv) {
    cv.visitInsn(opcode);
  }
}
