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