diff options
Diffstat (limited to 'vendor/go.mau.fi/util/ptr/ptr.go')
-rw-r--r-- | vendor/go.mau.fi/util/ptr/ptr.go | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/go.mau.fi/util/ptr/ptr.go b/vendor/go.mau.fi/util/ptr/ptr.go new file mode 100644 index 0000000..b04fa19 --- /dev/null +++ b/vendor/go.mau.fi/util/ptr/ptr.go @@ -0,0 +1,43 @@ +// 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 +} |