/*
* @(#)UnaryExpression.java 1.15 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 java.io.PrintStream;
import java.util.Hashtable;
public
class UnaryExpression extends Expression {
Expression right;
/**
* Constructor
*/
UnaryExpression(int op, int where, Type type, Expression right) {
super(op, where, type);
this.right = right;
}
/**
* Order the expression based on precedence
*/
public Expression order() {
if (precedence() > right.precedence()) {
UnaryExpression e = (UnaryExpression)right;
right = e.right;
e.right = order();
return e;
}
return this;
}
/**
* Select the type of the expression
*/
void selectType(Environment env, Context ctx, int tm) {
throw new CompilerError("selectType: " + opNames[op]);
}
/**
* Check a unary expression
*/
public long checkValue(Environment env, Context ctx, long vset, Hashtable exp) {
vset = right.checkValue(env, ctx, vset, exp);
int tm = right.type.getTypeMask();
selectType(env, ctx, tm);
if (((tm & TM_ERROR) == 0) && type.isType(TC_ERROR)) {
env.error(where, "invalid.arg", opNames[op]);
}
return vset;
}
/**
* Evaluate
*/
Expression eval(int a) {
return this;
}
Expression eval(long a) {
return this;
}
Expression eval(float a) {
return this;
}
Expression eval(double a) {
return this;
}
Expression eval(boolean a) {
return this;
}
Expression eval(String a) {
return this;
}
Expression eval() {
switch (right.op) {
case BYTEVAL:
case CHARVAL:
case SHORTVAL:
case INTVAL:
return eval(((IntegerExpression)right).value);
case LONGVAL:
return eval(((LongExpression)right).value);
case FLOATVAL:
return eval(((FloatExpression)right).value);
case DOUBLEVAL:
return eval(((DoubleExpression)right).value);
case BOOLEANVAL:
return eval(((BooleanExpression)right).value);
case STRINGVAL:
return eval(((StringExpression)right).value);
}
return this;
}
/**
* Inline
*/
public Expression inline(Environment env, Context ctx) {
return right.inline(env, ctx);
}
public Expression inlineValue(Environment env, Context ctx) {
right = right.inlineValue(env, ctx);
try {
return eval().simplify();
} catch (ArithmeticException e) {
env.error(where, "arithmetic.exception");
return this;
}
}
/**
* Create a copy of the expression for method inlining
*/
public Expression copyInline(Context ctx) {
UnaryExpression e = (UnaryExpression)clone();
if (right != null) {
e.right = right.copyInline(ctx);
}
return e;
}
/**
* The cost of inlining this expression
*/
public int costInline(int thresh) {
return 1 + right.costInline(thresh);
}
/**
* Print
*/
public void print(PrintStream out) {
out.print("(" + opNames[op] + " ");
right.print(out);
out.print(")");
}
}