46 lines
2.0 KiB
Racket
46 lines
2.0 KiB
Racket
#lang racket/base
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(provide gen:preservable
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preservable?
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->preserve
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preservable/c)
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(require preserves)
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(require racket/generic)
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(require racket/set)
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(require racket/dict)
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(define-generics preservable
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(->preserve preservable)
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#:fast-defaults ([boolean? (define (->preserve preservable) preservable)]
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[number? (define (->preserve preservable) preservable)]
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[string? (define (->preserve preservable) preservable)]
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[bytes? (define (->preserve preservable) preservable)]
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[symbol? (define (->preserve preservable) preservable)]
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[null? (define (->preserve preservable) preservable)]
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[pair?
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(define/generic *->preserve ->preserve)
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(define (->preserve preservable) (map *->preserve preservable))]
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[hash?
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(define/generic *->preserve ->preserve)
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(define (->preserve preservable)
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(for/hash [((k v) (in-hash preservable))]
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(values (*->preserve k) (*->preserve v))))])
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#:defaults ([float? (define (->preserve preservable) preservable)]
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[embedded? (define (->preserve preservable) preservable)]
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[record?
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(define/generic *->preserve ->preserve)
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(define (->preserve preservable)
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(record (*->preserve (record-label preservable))
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(map *->preserve (record-fields preservable))))]
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[set?
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(define/generic *->preserve ->preserve)
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(define (->preserve preservable)
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(for/set [(v (in-set preservable))]
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(*->preserve v)))]
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[dict?
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(define/generic *->preserve ->preserve)
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(define (->preserve preservable)
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(for/hash [((k v) (in-dict preservable))]
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(values (*->preserve k) (*->preserve v))))]))
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