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