
net.sandius.rembulan.parser.ast.Numeral Maven / Gradle / Ivy
/*
* Copyright 2016 Miroslav Janíček
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sandius.rembulan.parser.ast;
import net.sandius.rembulan.LuaFormat;
import net.sandius.rembulan.util.Check;
public abstract class Numeral extends Literal {
private Numeral() {
}
public static Numeral fromString(String s) {
Check.notNull(s);
Number n = LuaFormat.tryParseNumeral(s);
if (n == null) {
throw new IllegalArgumentException("not a number: " + s);
}
return n instanceof Double || n instanceof Float
? new FloatNumeral(n.doubleValue())
: new IntegerNumeral(n.longValue());
}
public static class IntegerNumeral extends Numeral {
private final long value;
public IntegerNumeral(long value) {
this.value = value;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
IntegerNumeral that = (IntegerNumeral) o;
return this.value == that.value;
}
@Override
public int hashCode() {
return (int) (value ^ (value >>> 32));
}
@Override
public String toString() {
return Long.toString(value);
}
public long value() {
return value;
}
@Override
public Literal accept(Transformer tf) {
return tf.transform(this);
}
}
public static class FloatNumeral extends Numeral {
private final double value;
public FloatNumeral(double value) {
Check.notNaN(value);
this.value = value;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
FloatNumeral that = (FloatNumeral) o;
return Double.compare(this.value, that.value) == 0;
}
@Override
public int hashCode() {
long temp = Double.doubleToLongBits(value);
return (int) (temp ^ (temp >>> 32));
}
@Override
public String toString() {
return Double.toString(value);
}
public double value() {
return value;
}
@Override
public Literal accept(Transformer tf) {
return tf.transform(this);
}
}
}
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