Alexander Udalov
33bcee7d6d
In case of start==end hasNext was always false, which resulted in iterators over one-element progressions not iterating that element
52 lines
1.4 KiB
Java
52 lines
1.4 KiB
Java
/*
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* Copyright 2010-2013 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package jet;
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import jet.runtime.ProgressionUtil;
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class IntProgressionIterator extends IntIterator {
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private int next;
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private final int increment;
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private final int finalElement;
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private boolean hasNext;
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public IntProgressionIterator(int start, int end, int increment) {
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this.next = start;
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this.increment = increment;
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this.finalElement = ProgressionUtil.getProgressionFinalElement(start, end, increment);
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this.hasNext = increment > 0 ? start <= end : start >= end;
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}
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@Override
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public boolean hasNext() {
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return hasNext;
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}
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@Override
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public int nextInt() {
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int value = next;
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if (value == finalElement) {
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hasNext = false;
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}
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else {
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next += increment;
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}
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return value;
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}
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}
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