/*
* @(#)CastExpression.java 1.13 95/09/14 Arthur van Hoff
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package sun.tools.tree;
import sun.tools.java.*;
import sun.tools.asm.Assembler;
import sun.tools.asm.Label;
import java.io.PrintStream;
import java.util.Hashtable;
public
class CastExpression extends BinaryExpression {
/**
* constructor
*/
public CastExpression(int where, Expression left, Expression right) {
super(CAST, where, left.type, left, right);
}
/**
* Check the expression
*/
public long checkValue(Environment env, Context ctx, long vset, Hashtable exp) {
type = left.toType(env, ctx);
vset = right.checkValue(env, ctx, vset, exp);
if (type.isType(TC_ERROR) || right.type.isType(TC_ERROR)) {
// An error was already reported
return vset;
}
if (type.equals(right.type)) {
// The types are already the same
return vset;
}
try {
if (env.explicitCast(right.type, type)) {
right = new ConvertExpression(where, type, right);
return vset;
}
} catch (ClassNotFound e) {
env.error(where, "class.not.found", e.name, opNames[op]);
}
// The cast is not allowed
env.error(where, "invalid.cast", right.type, type);
return vset;
}
/**
* Inline
*/
public Expression inline(Environment env, Context ctx) {
return right.inline(env, ctx);
}
public Expression inlineValue(Environment env, Context ctx) {
return right.inlineValue(env, ctx);
}
/**
* Print
*/
public void print(PrintStream out) {
out.print("(" + opNames[op] + " ");
if (type.isType(TC_ERROR)) {
left.print(out);
} else {
out.print(type);
}
out.print(" ");
right.print(out);
out.print(")");
}
}