mirror of
https://github.com/crazy-max/diun.git
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df3125c3f8
Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.33.3 to 0.34.1. - [Changelog](https://github.com/kubernetes/client-go/blob/master/CHANGELOG.md) - [Commits](https://github.com/kubernetes/client-go/compare/v0.33.3...v0.34.1) --- updated-dependencies: - dependency-name: k8s.io/client-go dependency-version: 0.34.1 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
/*
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Copyright 2024 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package safe
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// Field takes a pointer to any value (which may or may not be nil) and a
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// function that traverses to a target type R (a typical use case is to
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// dereference a field), and returns the result of the traversal, or the zero
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// value of the target type.
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//
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// This is roughly equivalent to:
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//
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// value != nil ? fn(value) : zero-value
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//
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// ...in languages that support the ternary operator.
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func Field[V any, R any](value *V, fn func(*V) R) R {
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if value == nil {
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var zero R
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return zero
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}
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o := fn(value)
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return o
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}
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// Cast takes any value, attempts to cast it to T, and returns the T value if
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// the cast is successful, or else the zero value of T.
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func Cast[T any](value any) T {
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result, _ := value.(T)
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return result
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}
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// Value takes a pointer to any value (which may or may not be nil) and a
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// function that returns a pointer to the same type. If the value is not nil,
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// it is returned, otherwise the result of the function is returned.
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//
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// This is roughly equivalent to:
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//
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// value != nil ? value : fn()
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//
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// ...in languages that support the ternary operator.
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func Value[T any](value *T, fn func() *T) *T {
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if value != nil {
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return value
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}
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return fn()
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}
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