Struct noCopy

map.go:1707–1707

noCopy may be added to structs which must not be copied after the first use. See https://golang.org/issues/8005#issuecomment-190753527 for details. Note that it must not be embedded, due to the Lock and Unlock methods.

//
// Note that it must not be embedded, due to the Lock and Unlock methods.
type noCopy struct{}

// Lock is a no-op used by -copylocks checker from `go vet`.
func (*noCopy) Lock()   {}