44 lines
1.0 KiB
Go
44 lines
1.0 KiB
Go
// Copyright (c) 2024 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package ptr
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// Clone creates a shallow copy of the given pointer.
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func Clone[T any](val *T) *T {
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if val == nil {
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return nil
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}
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valCopy := *val
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return &valCopy
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}
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// Ptr returns a pointer to the given value.
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func Ptr[T any](val T) *T {
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return &val
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}
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// NonZero returns a pointer to the given comparable value, unless the value is the type's zero value.
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func NonZero[T comparable](val T) *T {
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var zero T
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return NonDefault(val, zero)
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}
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// NonDefault returns a pointer to the first parameter, unless it is equal to the second parameter.
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func NonDefault[T comparable](val, def T) *T {
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if val == def {
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return nil
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}
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return &val
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}
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// Val returns the value of the given pointer, or the zero value of the type if the pointer is nil.
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func Val[T any](ptr *T) (val T) {
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if ptr != nil {
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val = *ptr
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}
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return
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}
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