/*
* @(#)AssignExpression.java 1.13 95/10/02 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 java.io.PrintStream;
import java.util.Hashtable;
public
class AssignExpression extends BinaryAssignExpression {
/**
* Constructor
*/
public AssignExpression(int where, Expression left, Expression right) {
super(ASSIGN, where, left, right);
}
/**
* Check an assignment expression
*/
public long checkValue(Environment env, Context ctx, long vset, Hashtable exp) {
vset = left.checkLHS(env, ctx, vset, exp);
vset = right.checkValue(env, ctx, vset, exp);
type = left.type;
right = convert(env, ctx, type, right);
return vset;
}
/**
* The cost of inlining this expression
*/
public int costInline(int thresh) {
return 2 + super.costInline(thresh);
}
/**
* Code
*/
public void codeValue(Environment env, Context ctx, Assembler asm) {
int depth = left.codeLValue(env, ctx, asm);
right.codeValue(env, ctx, asm);
codeDup(env, ctx, asm, right.type.stackSize(), depth);
left.codeStore(env, ctx, asm);
}
public void code(Environment env, Context ctx, Assembler asm) {
left.codeLValue(env, ctx, asm);
right.codeValue(env, ctx, asm);
left.codeStore(env, ctx, asm);
}
}