26 lines
317 B
Go
26 lines
317 B
Go
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package utilities
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import (
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"fmt"
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"sync"
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)
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func Singleton[T any](init func() (T, error)) func() T {
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var (
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once sync.Once
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t T
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)
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return func() T {
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once.Do(func() {
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var err error
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t, err = init()
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if err != nil {
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panic(fmt.Sprintf("creating %T failed: %s", t, err))
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}
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})
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return t
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}
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}
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