45 lines
790 B
Go
45 lines
790 B
Go
// Package intern interns strings.
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// Interning is best effort only.
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// Interned strings may be removed automatically
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// at any time without notification.
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// All functions may be called concurrently
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// with themselves and each other.
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package intern
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import "sync"
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var (
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pool sync.Pool = sync.Pool{
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New: func() interface{} {
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return make(map[string]string)
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},
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}
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)
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// String returns s, interned.
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func String(s string) string {
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m := pool.Get().(map[string]string)
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c, ok := m[s]
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if ok {
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pool.Put(m)
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return c
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}
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m[s] = s
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pool.Put(m)
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return s
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}
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// Bytes returns b converted to a string, interned.
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func Bytes(b []byte) string {
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m := pool.Get().(map[string]string)
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c, ok := m[string(b)]
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if ok {
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pool.Put(m)
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return c
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}
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s := string(b)
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m[s] = s
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pool.Put(m)
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return s
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}
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