forked from cerc-io/ipld-eth-server
59 lines
2.0 KiB
Go
59 lines
2.0 KiB
Go
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/*
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Open Source Initiative OSI - The MIT License (MIT):Licensing
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The MIT License (MIT)
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Copyright (c) 2013 Ralph Caraveo (deckarep@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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package mapset
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// Iterator defines an iterator over a Set, its C channel can be used to range over the Set's
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// elements.
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type Iterator struct {
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C <-chan interface{}
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stop chan struct{}
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}
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// Stop stops the Iterator, no further elements will be received on C, C will be closed.
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func (i *Iterator) Stop() {
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// Allows for Stop() to be called multiple times
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// (close() panics when called on already closed channel)
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defer func() {
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recover()
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}()
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close(i.stop)
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// Exhaust any remaining elements.
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for range i.C {
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}
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}
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// newIterator returns a new Iterator instance together with its item and stop channels.
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func newIterator() (*Iterator, chan<- interface{}, <-chan struct{}) {
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itemChan := make(chan interface{})
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stopChan := make(chan struct{})
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return &Iterator{
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C: itemChan,
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stop: stopChan,
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}, itemChan, stopChan
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}
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