/*
* @(#)CommaExpression.java 1.11 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 java.util.Hashtable;
public
class CommaExpression extends BinaryExpression {
/**
* constructor
*/
public CommaExpression(int where, Expression left, Expression right) {
super(COMMA, where, (right != null) ? right.type : Type.tVoid, left, right);
}
/**
* Check void expression
*/
public long check(Environment env, Context ctx, long vset, Hashtable exp) {
vset = left.check(env, ctx, vset, exp);
vset = right.check(env, ctx, vset, exp);
return vset;
}
/**
* Select the type
*/
void selectType(Environment env, Context ctx, int tm) {
type = right.type;
}
/**
* Simplify
*/
Expression simplify() {
if (left == null) {
return right;
}
if (right == null) {
return left;
}
return this;
}
/**
* Inline
*/
public Expression inline(Environment env, Context ctx) {
if (left != null) {
left = left.inline(env, ctx);
}
if (right != null) {
right = right.inline(env, ctx);
}
return simplify();
}
public Expression inlineValue(Environment env, Context ctx) {
if (left != null) {
left = left.inline(env, ctx);
}
if (right != null) {
right = right.inlineValue(env, ctx);
}
return simplify();
}
/**
* Code
*/
public void codeValue(Environment env, Context ctx, Assembler asm) {
if (left != null) {
left.code(env, ctx, asm);
}
right.codeValue(env, ctx, asm);
}
public void code(Environment env, Context ctx, Assembler asm) {
if (left != null) {
left.code(env, ctx, asm);
}
if (right != null) {
right.code(env, ctx, asm);
}
}
}