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Functions ¶
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Types ¶
type SucceedOnce ¶
type SucceedOnce struct {
// contains filtered or unexported fields
}
SucceedOnce is a sync.Once variant that allows for the operation to fail.
func (*SucceedOnce) Do ¶
func (o *SucceedOnce) Do(fn func() error) error
Do executes the fn if and only if it has not been called successfully before.
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