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37 lines
1.5 KiB
Go
37 lines
1.5 KiB
Go
// Copyright ©2014 The Gonum Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build appengine safe
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package set
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import "reflect"
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// same determines whether two sets are backed by the same store. In the
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// current implementation using hash maps it makes use of the fact that
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// hash maps are passed as a pointer to a runtime Hmap struct. A map is
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// not seen by the runtime as a pointer though, so we use reflect to get
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// the maps' pointer values to compare.
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func same(a, b Nodes) bool {
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return reflect.ValueOf(a).Pointer() == reflect.ValueOf(b).Pointer()
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}
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// intsSame determines whether two sets are backed by the same store. In the
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// current implementation using hash maps it makes use of the fact that
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// hash maps are passed as a pointer to a runtime Hmap struct. A map is
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// not seen by the runtime as a pointer though, so we use reflect to get
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// the maps' pointer values to compare.
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func intsSame(a, b Ints) bool {
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return reflect.ValueOf(a).Pointer() == reflect.ValueOf(b).Pointer()
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}
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// int64sSame determines whether two sets are backed by the same store. In the
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// current implementation using hash maps it makes use of the fact that
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// hash maps are passed as a pointer to a runtime Hmap struct. A map is
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// not seen by the runtime as a pointer though, so we use reflect to get
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// the maps' pointer values to compare.
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func int64sSame(a, b Int64s) bool {
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return reflect.ValueOf(a).Pointer() == reflect.ValueOf(b).Pointer()
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}
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