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21 lines
732 B
Racket
21 lines
732 B
Racket
#lang restructure/racket
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(require racket/dict "struct.rkt")
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(provide (all-defined-out))
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#|
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approximates
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https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
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|#
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(define-subclass RStruct (RVersionedStruct type [versions (dictify)])
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(define/override (decode stream [parent #f] [length 0])
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(define res (send this _setup stream parent length))
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(define version (cond
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[(procedure? type) (type parent)]
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[(is-a? type RBase) (send type decode stream)]
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[else (raise-argument-error 'decode "way of finding version" type)]))
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(report version 'yay)
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#;(_parseFields stream res fields)
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#;(send this process res stream)
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res)) |