blob: b04fa1913b5dc70cb69882fe46132ad3808affc0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// Copyright (c) 2024 Tulir Asokan
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package ptr
// Clone creates a shallow copy of the given pointer.
func Clone[T any](val *T) *T {
if val == nil {
return nil
}
valCopy := *val
return &valCopy
}
// Ptr returns a pointer to the given value.
func Ptr[T any](val T) *T {
return &val
}
// NonZero returns a pointer to the given comparable value, unless the value is the type's zero value.
func NonZero[T comparable](val T) *T {
var zero T
return NonDefault(val, zero)
}
// NonDefault returns a pointer to the first parameter, unless it is equal to the second parameter.
func NonDefault[T comparable](val, def T) *T {
if val == def {
return nil
}
return &val
}
// Val returns the value of the given pointer, or the zero value of the type if the pointer is nil.
func Val[T any](ptr *T) (val T) {
if ptr != nil {
val = *ptr
}
return
}
|
