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// run
// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
"maps"
)
func main() {
m := map[string]struct{}{}
// Fill m up to the max for 4 buckets = 48 entries.
for i := 0; i < 48; i++ {
m[fmt.Sprintf("%d", i)] = struct{}{}
}
// Add a 49th entry, to start a grow to 8 buckets.
m["foo"] = struct{}{}
// Remove that 49th entry. m is still growing to 8 buckets,
// but a clone of m will only have 4 buckets because it
// only needs to fit 48 entries.
delete(m, "foo")
// Clone an 8-bucket map to a 4-bucket map.
_ = maps.Clone(m)
}
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