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	/*
	* Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.tools.tree;

	import sun.tools.java.*;
	import sun.tools.asm.Assembler;
	import java.io.PrintStream;
	import java.util.Hashtable;

	/**
	* WARNING: The contents of this source file are not part of any
	* supported API. Code that depends on them does so at its own risk:
	* they are subject to change or removal without notice.
	*/
	public
	class ConvertExpression extends UnaryExpression {
	/**
	* Constructor
	*/
	public ConvertExpression(long where, Type type, Expression right) {
	super(CONVERT, where, type, right);
	}

	/**
	* Check the value
	*/
	public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) {
	return right.checkValue(env, ctx, vset, exp);
	}

	/**
	* Simplify
	*/
	Expression simplify() {
	switch (right.op) {
	case BYTEVAL:
	case CHARVAL:
	case SHORTVAL:
	case INTVAL: {
	int value = ((IntegerExpression)right).value;
	switch (type.getTypeCode()) {
	case TC_BYTE: return new ByteExpression(right.where, (byte)value);
	case TC_CHAR: return new CharExpression(right.where, (char)value);
	case TC_SHORT: return new ShortExpression(right.where, (short)value);
	case TC_INT: return new IntExpression(right.where, (int)value);
	case TC_LONG: return new LongExpression(right.where, (long)value);
	case TC_FLOAT: return new FloatExpression(right.where, (float)value);
	case TC_DOUBLE: return new DoubleExpression(right.where, (double)value);
	}
	break;
	}
	case LONGVAL: {
	long value = ((LongExpression)right).value;
	switch (type.getTypeCode()) {
	case TC_BYTE: return new ByteExpression(right.where, (byte)value);
	case TC_CHAR: return new CharExpression(right.where, (char)value);
	case TC_SHORT: return new ShortExpression(right.where, (short)value);
	case TC_INT: return new IntExpression(right.where, (int)value);
	case TC_FLOAT: return new FloatExpression(right.where, (float)value);
	case TC_DOUBLE: return new DoubleExpression(right.where, (double)value);
	}
	break;
	}
	case FLOATVAL: {
	float value = ((FloatExpression)right).value;
	switch (type.getTypeCode()) {
	case TC_BYTE: return new ByteExpression(right.where, (byte)value);
	case TC_CHAR: return new CharExpression(right.where, (char)value);
	case TC_SHORT: return new ShortExpression(right.where, (short)value);
	case TC_INT: return new IntExpression(right.where, (int)value);
	case TC_LONG: return new LongExpression(right.where, (long)value);
	case TC_DOUBLE: return new DoubleExpression(right.where, (double)value);
	}
	break;
	}
	case DOUBLEVAL: {
	double value = ((DoubleExpression)right).value;
	switch (type.getTypeCode()) {
	case TC_BYTE: return new ByteExpression(right.where, (byte)value);
	case TC_CHAR: return new CharExpression(right.where, (char)value);
	case TC_SHORT: return new ShortExpression(right.where, (short)value);
	case TC_INT: return new IntExpression(right.where, (int)value);
	case TC_LONG: return new LongExpression(right.where, (long)value);
	case TC_FLOAT: return new FloatExpression(right.where, (float)value);
	}
	break;
	}
	}
	return this;
	}

	/**
	* Check if the expression is equal to a value
	*/
	public boolean equals(int i) {
	return right.equals(i);
	}
	public boolean equals(boolean b) {
	return right.equals(b);
	}

	/**
	* Inline
	*/
	public Expression inline(Environment env, Context ctx) {
	// super.inline throws away the op.
	// This is sometimes incorrect, since casts can have side effects.
	if (right.type.inMask(TM_REFERENCE) && type.inMask(TM_REFERENCE)) {
	try {
	if (!env.implicitCast(right.type, type))
	return inlineValue(env, ctx);
	} catch (ClassNotFound e) {
	throw new CompilerError(e);
	}
	}
	return super.inline(env, ctx);
	}

	/**
	* Code
	*/
	public void codeValue(Environment env, Context ctx, Assembler asm) {
	right.codeValue(env, ctx, asm);
	codeConversion(env, ctx, asm, right.type, type);
	}

	/**
	* Print
	*/
	public void print(PrintStream out) {
	out.print("(" + opNames[op] + " " + type.toString() + " ");
	right.print(out);
	out.print(")");
	}
	}

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