/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package jdk.nashorn.internal.ir;
import java.io.Serializable;
import java.util.List;
import jdk.nashorn.internal.codegen.CompileUnit;
/**
* An interface for splittable expressions.
*/
public interface Splittable {
/**
* Get a list of split ranges for this splittable expression, or null
* if the expression should not be split.
*
* @return a list of split ranges
*/
List<SplitRange> getSplitRanges();
/**
* A SplitRange is a range in a splittable expression. It defines the
* boundaries of the split range and provides a compile unit for code generation.
*/
final class SplitRange implements CompileUnitHolder, Serializable {
private static final long serialVersionUID = 1L;
/** Compile unit associated with the postsets range. */
private final CompileUnit compileUnit;
/** postsets range associated with the unit (hi not inclusive). */
private final int low, high;
/**
* Constructor
* @param compileUnit compile unit
* @param low lowest array index in unit
* @param high highest array index in unit + 1
*/
public SplitRange(final CompileUnit compileUnit, final int low, final int high) {
this.compileUnit = compileUnit;
this.low = low;
this.high = high;
}
/**
* Get the high index position of the ArrayUnit (exclusive)
* @return high index position
*/
public int getHigh() {
return high;
}
/**
* Get the low index position of the ArrayUnit (inclusive)
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