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#lang restructure/racket
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(require "versioned-struct.rkt" "string.rkt" "number.rkt" "buffer.rkt" "stream.rkt" rackunit "pointer.rkt")
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approximates
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https://github.com/mbutterick/restructure/blob/master/test/VersionedStruct.coffee
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|#
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;describe 'VersionedStruct', ->
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; describe 'decode', ->
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; it 'should get version from number type', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; stream = new DecodeStream new Buffer '\x00\x05devon\x15'
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; struct.decode(stream).should.deep.equal
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; version: 0
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; name: 'devon'
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; age: 21
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;
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; stream = new DecodeStream new Buffer '\x01\x0adevon 👍\x15\x00', 'utf8'
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; struct.decode(stream).should.deep.equal
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; version: 1
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; name: 'devon 👍'
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; age: 21
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; gender: 0
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
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'age uint8
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'gender uint8)))])
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(let ([stream (+DecodeStream (+Buffer "\x00\x05devon\x15"))])
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(check-equal? (send (send struct decode stream) kv) (mhasheq 'name "devon"
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'age 21
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'version 0)))
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(let ([stream (+DecodeStream (+Buffer "\x01\x0adevon 👍\x15\x00"))])
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(check-equal? (send (send struct decode stream) kv) (mhasheq 'name "devon 👍"
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'age 21
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'version 1
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'gender 0))))
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;
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; it 'should throw for unknown version', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; stream = new DecodeStream new Buffer '\x05\x05devon\x15'
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; should.throw ->
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; struct.decode(stream)
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
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'age uint8
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'gender uint8)))])
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(let ([stream (+DecodeStream (+Buffer "\x05\x05devon\x15"))])
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(check-exn exn:fail:contract? (λ () (send struct decode stream)))))
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;
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; it 'should support common header block', ->
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; struct = new VersionedStruct uint8,
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; header:
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; age: uint8
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; alive: uint8
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; 0:
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; name: new StringT uint8, 'ascii'
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; 1:
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; name: new StringT uint8, 'utf8'
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; gender: uint8
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;
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; stream = new DecodeStream new Buffer '\x00\x15\x01\x05devon'
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; struct.decode(stream).should.deep.equal
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; version: 0
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; age: 21
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; alive: 1
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; name: 'devon'
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;
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; stream = new DecodeStream new Buffer '\x01\x15\x01\x0adevon 👍\x00', 'utf8'
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; struct.decode(stream).should.deep.equal
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; version: 1
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; age: 21
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; alive: 1
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; name: 'devon 👍'
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; gender: 0
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(let ([struct (+VersionedStruct uint8
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(dictify
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'header (dictify 'age uint8
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'alive uint8)
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0 (dictify 'name (+StringT uint8 'ascii))
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1 (dictify 'name (+StringT uint8 'utf8)
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'gender uint8)))])
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(let ([stream (+DecodeStream (+Buffer "\x00\x15\x01\x05devon"))])
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(check-equal? (send (send struct decode stream) kv) (mhasheq 'name "devon"
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'age 21
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'alive 1
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'version 0)))
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(let ([stream (+DecodeStream (+Buffer "\x01\x15\x01\x0adevon 👍\x00"))])
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(check-equal? (send (send struct decode stream) kv) (mhasheq 'name "devon 👍"
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'age 21
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'version 1
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'alive 1
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'gender 0))))
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;
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; it 'should support parent version key', ->
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; struct = new VersionedStruct 'version',
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; stream = new DecodeStream new Buffer '\x05devon\x15'
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; struct.decode(stream, version: 0).should.deep.equal
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; version: 0
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; name: 'devon'
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; age: 21
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;
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; stream = new DecodeStream new Buffer '\x0adevon 👍\x15\x00', 'utf8'
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; struct.decode(stream, version: 1).should.deep.equal
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; version: 1
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; name: 'devon 👍'
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; age: 21
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; gender: 0
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(let ([struct (+VersionedStruct 'version
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
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'age uint8
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'gender uint8)))])
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(let ([stream (+DecodeStream (+Buffer "\x05devon\x15"))])
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(check-equal? (send (send struct decode stream (mhash 'version 0)) kv) (mhasheq 'name "devon"
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'age 21
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'version 0)))
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(let ([stream (+DecodeStream (+Buffer "\x0adevon 👍\x15\x00" 'utf8))])
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(check-equal? (send (send struct decode stream (mhash 'version 1)) kv) (mhasheq 'name "devon 👍"
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'age 21
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'version 1
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'gender 0))))
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;
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; it 'should support sub versioned structs', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1: new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8
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; 1:
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; name: new StringT uint8
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; isDesert: uint8
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;
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; stream = new DecodeStream new Buffer '\x00\x05devon\x15'
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; struct.decode(stream, version: 0).should.deep.equal
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; version: 0
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; name: 'devon'
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; age: 21
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;
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; stream = new DecodeStream new Buffer '\x01\x00\x05pasta'
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; struct.decode(stream, version: 0).should.deep.equal
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; version: 0
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; name: 'pasta'
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;
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; stream = new DecodeStream new Buffer '\x01\x01\x09ice cream\x01'
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; struct.decode(stream, version: 0).should.deep.equal
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; version: 1
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; name: 'ice cream'
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; isDesert: 1
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8))
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1 (dictify 'name (+StringT uint8)
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'isDessert uint8)))))])
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(let ([stream (+DecodeStream (+Buffer "\x00\x05devon\x15"))])
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(check-equal? (send (send struct decode stream (mhash 'version 0)) kv) (mhasheq 'name "devon"
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'age 21
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'version 0)))
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(let ([stream (+DecodeStream (+Buffer "\x01\x00\x05pasta"))])
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(check-equal? (send (send struct decode stream (mhash 'version 0)) kv) (mhasheq 'name "pasta"
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'version 0)))
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(let ([stream (+DecodeStream (+Buffer "\x01\x01\x09ice cream\x01"))])
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(check-equal? (send (send struct decode stream (mhash 'version 0)) kv) (mhasheq 'name "ice cream"
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'isDessert 1
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'version 1))))
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;
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; it 'should support process hook', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; struct.process = ->
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; @processed = true
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;
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; stream = new DecodeStream new Buffer '\x00\x05devon\x15'
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; struct.decode(stream).should.deep.equal
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; version: 0
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; name: 'devon'
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; age: 21
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; processed: true
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
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'age uint8
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'gender uint8)))])
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(set-field! process struct (λ (o stream ctx) (ref-set! o 'processed "true") o))
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(let ([stream (+DecodeStream (+Buffer "\x00\x05devon\x15"))])
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(check-equal? (send (send struct decode stream) kv) (mhasheq 'name "devon"
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'processed "true"
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'age 21
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'version 0))))
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;
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; describe 'size', ->
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; it 'should compute the correct size', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; size = struct.size
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; version: 0
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; name: 'devon'
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; age: 21
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;
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; size.should.equal 8
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;
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; size = struct.size
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; version: 1
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; name: 'devon 👍'
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; age: 21
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; gender: 0
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;
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; size.should.equal 14
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
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'age uint8
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'gender uint8)))])
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(check-equal? (send struct size (mhasheq 'name "devon"
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'age 21
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'version 0)) 8)
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(check-equal? (send struct size (mhasheq 'name "devon 👍"
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'gender 0
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'age 21
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'version 1)) 14))
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;
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; it 'should throw for unknown version', ->
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; struct = new VersionedStruct uint8,
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; 0:
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; name: new StringT uint8, 'ascii'
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; age: uint8
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; 1:
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; name: new StringT uint8, 'utf8'
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; age: uint8
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; gender: uint8
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;
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; should.throw ->
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; struct.size
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; version: 5
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; name: 'devon'
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; age: 21
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(let ([struct (+VersionedStruct uint8
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(dictify
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0 (dictify 'name (+StringT uint8 'ascii)
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'age uint8)
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1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'gender uint8)))])
|
|
|
|
|
|
|
|
|
|
(check-exn exn:fail:contract? (λ () (send struct size (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'version 5)))))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; it 'should support common header block', ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; header:
|
|
|
|
|
; age: uint8
|
|
|
|
|
; alive: uint8
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; size = struct.size
|
|
|
|
|
; version: 0
|
|
|
|
|
; age: 21
|
|
|
|
|
; alive: 1
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
;
|
|
|
|
|
; size.should.equal 9
|
|
|
|
|
;
|
|
|
|
|
; size = struct.size
|
|
|
|
|
; version: 1
|
|
|
|
|
; age: 21
|
|
|
|
|
; alive: 1
|
|
|
|
|
; name: 'devon 👍'
|
|
|
|
|
; gender: 0
|
|
|
|
|
;
|
|
|
|
|
; size.should.equal 15
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
'header (dictify 'age uint8
|
|
|
|
|
'alive uint8)
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii))
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'gender uint8)))])
|
|
|
|
|
|
|
|
|
|
(check-equal? (send struct size (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'alive 1
|
|
|
|
|
'version 0)) 9)
|
|
|
|
|
|
|
|
|
|
(check-equal? (send struct size (mhasheq 'name "devon 👍"
|
|
|
|
|
'gender 0
|
|
|
|
|
'age 21
|
|
|
|
|
'alive 1
|
|
|
|
|
'version 1)) 15))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; it 'should compute the correct size with pointers', ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; ptr: new Pointer uint8, new StringT uint8
|
|
|
|
|
;
|
|
|
|
|
; size = struct.size
|
|
|
|
|
; version: 1
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
; age: 21
|
|
|
|
|
; ptr: 'hello'
|
|
|
|
|
;
|
|
|
|
|
; size.should.equal 15
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'ptr (+Pointer uint8 (+StringT uint8)))))])
|
|
|
|
|
|
|
|
|
|
(check-equal? (send struct size (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'version 1
|
|
|
|
|
'ptr "hello")) 15))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; it 'should throw if no value is given', ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT 4, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT 4, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; should.throw ->
|
|
|
|
|
; struct.size()
|
|
|
|
|
; , /not a fixed size/i
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'gender uint8)))])
|
|
|
|
|
|
|
|
|
|
(check-exn exn:fail:contract? (λ () (send struct size))))
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; describe 'encode', ->
|
|
|
|
|
; it 'should encode objects to buffers', (done) ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; stream = new EncodeStream
|
|
|
|
|
; stream.pipe concat (buf) ->
|
|
|
|
|
; buf.should.deep.equal new Buffer '\x00\x05devon\x15\x01\x0adevon 👍\x15\x00', 'utf8'
|
|
|
|
|
; done()
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 0
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
; age: 21
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 1
|
|
|
|
|
; name: 'devon 👍'
|
|
|
|
|
; age: 21
|
|
|
|
|
; gender: 0
|
|
|
|
|
;
|
|
|
|
|
; stream.end()
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'gender uint8)))]
|
|
|
|
|
[stream (+EncodeStream)])
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'version 0))
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon 👍"
|
|
|
|
|
'age 21
|
|
|
|
|
'gender 0
|
|
|
|
|
'version 1))
|
|
|
|
|
(check-equal? (send stream dump) (+Buffer "\x00\x05devon\x15\x01\x0adevon 👍\x15\x00" 'utf8)))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; it 'should throw for unknown version', ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; stream = new EncodeStream
|
|
|
|
|
; should.throw ->
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 5
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
; age: 21
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'gender uint8)))]
|
|
|
|
|
[stream (+EncodeStream)])
|
|
|
|
|
(check-exn exn:fail:contract? (λ () (send struct encode stream (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'version 5)))))
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; it 'should support common header block', (done) ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; header:
|
|
|
|
|
; age: uint8
|
|
|
|
|
; alive: uint8
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; stream = new EncodeStream
|
|
|
|
|
; stream.pipe concat (buf) ->
|
|
|
|
|
; buf.should.deep.equal new Buffer '\x00\x15\x01\x05devon\x01\x15\x01\x0adevon 👍\x00', 'utf8'
|
|
|
|
|
; done()
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 0
|
|
|
|
|
; age: 21
|
|
|
|
|
; alive: 1
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 1
|
|
|
|
|
; age: 21
|
|
|
|
|
; alive: 1
|
|
|
|
|
; name: 'devon 👍'
|
|
|
|
|
; gender: 0
|
|
|
|
|
;
|
|
|
|
|
; stream.end()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
'header (dictify 'age uint8
|
|
|
|
|
'alive uint8)
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii))
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'gender uint8)))]
|
|
|
|
|
[stream (+EncodeStream)])
|
|
|
|
|
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'alive 1
|
|
|
|
|
'version 0))
|
|
|
|
|
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon 👍"
|
|
|
|
|
'gender 0
|
|
|
|
|
'age 21
|
|
|
|
|
'alive 1
|
|
|
|
|
'version 1))
|
|
|
|
|
|
|
|
|
|
(check-equal? (send stream dump) (+Buffer "\x00\x15\x01\x05devon\x01\x15\x01\x0adevon 👍\x00" 'utf8)))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; it 'should encode pointer data after structure', (done) ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; ptr: new Pointer uint8, new StringT uint8
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; stream = new EncodeStream
|
|
|
|
|
; stream.pipe concat (buf) ->
|
|
|
|
|
; buf.should.deep.equal new Buffer '\x01\x05devon\x15\x09\x05hello', 'utf8'
|
|
|
|
|
; done()
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; version: 1
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
; age: 21
|
|
|
|
|
; ptr: 'hello'
|
|
|
|
|
;
|
|
|
|
|
; stream.end()
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'ptr (+Pointer uint8 (+StringT uint8)))))]
|
|
|
|
|
[stream (+EncodeStream)])
|
|
|
|
|
(send struct encode stream (mhasheq 'version 1
|
|
|
|
|
'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'ptr "hello"))
|
|
|
|
|
|
|
|
|
|
(check-equal? (send stream dump) (+Buffer "\x01\x05devon\x15\x09\x05hello" 'utf8)))
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
;
|
|
|
|
|
; it 'should support preEncode hook', (done) ->
|
|
|
|
|
; struct = new VersionedStruct uint8,
|
|
|
|
|
; 0:
|
|
|
|
|
; name: new StringT uint8, 'ascii'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; 1:
|
|
|
|
|
; name: new StringT uint8, 'utf8'
|
|
|
|
|
; age: uint8
|
|
|
|
|
; gender: uint8
|
|
|
|
|
;
|
|
|
|
|
; struct.preEncode = ->
|
|
|
|
|
; @version = if @gender? then 1 else 0
|
|
|
|
|
;
|
|
|
|
|
; stream = new EncodeStream
|
|
|
|
|
; stream.pipe concat (buf) ->
|
|
|
|
|
; buf.should.deep.equal new Buffer '\x00\x05devon\x15\x01\x0adevon 👍\x15\x00', 'utf8'
|
|
|
|
|
; done()
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; name: 'devon'
|
|
|
|
|
; age: 21
|
|
|
|
|
;
|
|
|
|
|
; struct.encode stream,
|
|
|
|
|
; name: 'devon 👍'
|
|
|
|
|
; age: 21
|
|
|
|
|
; gender: 0
|
|
|
|
|
;
|
|
|
|
|
; stream.end()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(let ([struct (+VersionedStruct uint8
|
|
|
|
|
(dictify
|
|
|
|
|
0 (dictify 'name (+StringT uint8 'ascii)
|
|
|
|
|
'age uint8)
|
|
|
|
|
1 (dictify 'name (+StringT uint8 'utf8)
|
|
|
|
|
'age uint8
|
|
|
|
|
'gender uint8)))]
|
|
|
|
|
[stream (+EncodeStream)])
|
|
|
|
|
(set-field! preEncode struct (λ (val stream) (ref-set! val 'version (if (ref val 'gender) 1 0))))
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon"
|
|
|
|
|
'age 21
|
|
|
|
|
'version 0))
|
|
|
|
|
(send struct encode stream (mhasheq 'name "devon 👍"
|
|
|
|
|
'age 21
|
|
|
|
|
'gender 0))
|
|
|
|
|
(check-equal? (send stream dump) (+Buffer "\x00\x05devon\x15\x01\x0adevon 👍\x15\x00" 'utf8)))
|
