0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass UnaryExpression extends Expression {
0N/A Expression right;
0N/A
0N/A /**
0N/A * Constructor
0N/A */
0N/A UnaryExpression(int op, long where, Type type, Expression right) {
0N/A super(op, where, type);
0N/A this.right = right;
0N/A }
0N/A
0N/A /**
0N/A * Order the expression based on precedence
0N/A */
0N/A public Expression order() {
0N/A if (precedence() > right.precedence()) {
0N/A UnaryExpression e = (UnaryExpression)right;
0N/A right = e.right;
0N/A e.right = order();
0N/A return e;
0N/A }
0N/A return this;
0N/A }
0N/A
0N/A /**
0N/A * Select the type of the expression
0N/A */
0N/A void selectType(Environment env, Context ctx, int tm) {
0N/A throw new CompilerError("selectType: " + opNames[op]);
0N/A }
0N/A
0N/A /**
0N/A * Check a unary expression
0N/A */
0N/A public Vset checkValue(Environment env, Context ctx, Vset vset, Hashtable exp) {
0N/A vset = right.checkValue(env, ctx, vset, exp);
0N/A
0N/A int tm = right.type.getTypeMask();
0N/A selectType(env, ctx, tm);
0N/A if (((tm & TM_ERROR) == 0) && type.isType(TC_ERROR)) {
0N/A env.error(where, "invalid.arg", opNames[op]);
0N/A }
0N/A return vset;
0N/A }
0N/A
0N/A /**
0N/A * Check if constant
0N/A */
0N/A public boolean isConstant() {
0N/A switch (op) {
0N/A case POS:
0N/A case NEG:
0N/A case BITNOT:
0N/A case NOT:
0N/A case EXPR:
0N/A case CONVERT: // generated inside of CastExpression
0N/A return right.isConstant();
0N/A }
0N/A return false;
0N/A }
0N/A
0N/A /**
0N/A * Evaluate
0N/A */
0N/A Expression eval(int a) {
0N/A return this;
0N/A }
0N/A Expression eval(long a) {
0N/A return this;
0N/A }
0N/A Expression eval(float a) {
0N/A return this;
0N/A }
0N/A Expression eval(double a) {
0N/A return this;
0N/A }
0N/A Expression eval(boolean a) {
0N/A return this;
0N/A }
0N/A Expression eval(String a) {
0N/A return this;
0N/A }
0N/A Expression eval() {
0N/A switch (right.op) {
0N/A case BYTEVAL:
0N/A case CHARVAL:
0N/A case SHORTVAL:
0N/A case INTVAL:
0N/A return eval(((IntegerExpression)right).value);
0N/A case LONGVAL:
0N/A return eval(((LongExpression)right).value);
0N/A case FLOATVAL:
0N/A return eval(((FloatExpression)right).value);
0N/A case DOUBLEVAL:
0N/A return eval(((DoubleExpression)right).value);
0N/A case BOOLEANVAL:
0N/A return eval(((BooleanExpression)right).value);
0N/A case STRINGVAL:
0N/A return eval(((StringExpression)right).value);
0N/A }
0N/A return this;
0N/A }
0N/A
0N/A /**
0N/A * Inline
0N/A */
0N/A public Expression inline(Environment env, Context ctx) {
0N/A return right.inline(env, ctx);
0N/A }
0N/A public Expression inlineValue(Environment env, Context ctx) {
0N/A right = right.inlineValue(env, ctx);
0N/A try {
0N/A return eval().simplify();
0N/A } catch (ArithmeticException e) {
0N/A // Got rid of this error message. It isn't illegal to
0N/A // have a program which does a constant division by
0N/A // zero. We return `this' to make the compiler to
0N/A // generate code here.
0N/A // (bugs 4019304, 4089107).
0N/A //
0N/A // I am not positive that this catch is ever reached.
0N/A //
0N/A // env.error(where, "arithmetic.exception");
0N/A return this;
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Create a copy of the expression for method inlining
0N/A */
0N/A public Expression copyInline(Context ctx) {
0N/A UnaryExpression e = (UnaryExpression)clone();
0N/A if (right != null) {
0N/A e.right = right.copyInline(ctx);
0N/A }
0N/A return e;
0N/A }
0N/A
0N/A /**
0N/A * The cost of inlining this expression
0N/A */
0N/A public int costInline(int thresh, Environment env, Context ctx) {
0N/A return 1 + right.costInline(thresh, env, ctx);
0N/A }
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out) {
0N/A out.print("(" + opNames[op] + " ");
0N/A right.print(out);
0N/A out.print(")");
0N/A }
0N/A}