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20 lines
387 B
Racket
20 lines
387 B
Racket
#lang racket/base
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(require racket/contract/base)
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(provide
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(contract-out
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[hash->immutable-hash (-> hash? (and/c hash? immutable?))]))
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;@----------------------------------------------------------------------------------------------------
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(define (hash->immutable-hash h)
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(if (and (hash? h) (immutable? h))
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h
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(for/hash ([(k v) (in-hash h)])
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(values k v))))
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