▼ |  | Mz Lib: Legacy Racket Libraries

1 | mzlib/ a-signature
2 | mzlib/ a-unit
3 | mzlib/ async-channel
4 | mzlib/ awk
5 | mzlib/ class
6 | mzlib/ class100
7 | mzlib/ cm
8 | mzlib/ cm-accomplice
9 | mzlib/ cmdline
10 | mzlib/ cml
11 | mzlib/ compat
12 | mzlib/ compile
13 | mzlib/ contract
14 | mzlib/ control
15 | mzlib/ date
16 | mzlib/ deflate
17 | mzlib/ defmacro
18 | mzlib/ etc
19 | mzlib/ file
20 | mzlib/ for
21 | mzlib/ foreign
22 | mzlib/ include
23 | mzlib/ inflate
24 | mzlib/ integer-set
25 | mzlib/ kw
26 | mzlib/ list
27 | mzlib/ match
28 | mzlib/ math
29 | mzlib/ md5
30 | mzlib/ os
31 | mzlib/ pconvert
32 | mzlib/ pconvert-prop
33 | mzlib/ plt-match
34 | mzlib/ port
35 | mzlib/ pregexp
36 | mzlib/ pretty
37 | mzlib/ process
38 | mzlib/ restart
39 | mzlib/ runtime-path
40 | mzlib/ sandbox
41 | mzlib/ sendevent
42 | mzlib/ serialize
43 | mzlib/ shared
44 | mzlib/ string
45 | mzlib/ struct
46 | mzlib/ stxparam
47 | mzlib/ surrogate
48 | mzlib/ tar
49 | mzlib/ thread
50 | mzlib/ trace
51 | mzlib/ traceld
52 | mzlib/ trait
53 | mzlib/ transcr
54 | mzlib/ unit
55 | mzlib/ unit-exptime
56 | mzlib/ unit200
57 | mzlib/ unitsig200
58 | mzlib/ zip
| Bibliography
| Index

On this page:

prop: print-converter
print-converter?
print-converter-proc
prop: print-convert-constructor-name
print-convert-named-constructor?
print-convert-constructor-name

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( require mzlib/pconvert-prop )

prop:print-converter : property?

( print-converter? v) → any
v : any/c

( print-converter-proc v)
→ (any/c (any/c . -> . any/c) . -> . any/c)
v : print-converter?

The prop:print-converter property can be given a procedure value for a structure type. In that case, for constructor-style print conversion via print-convert, instances of the structure are converted by calling the procedure that is the property’s value. The procedure is called with the value to convert and a procedure to recursively convert nested values. The result should be an S-expression for the converted value.

The print-converter? predicate recognizes instances of structure types that have the prop:print-converter property, and print-converter-proc extracts the property value.

prop:print-convert-constructor-name : property?

( print-convert-named-constructor? v) → any
v : any/c

( print-convert-constructor-name v) → any
v : print-convert-named-constructor?

The prop:print-convert-constructor-name property can be given a symbol value for a structure type. In that case, for constructor-style print conversion via print-convert, instances of the structure are shown using the symbol as the constructor name.

The prop:print-converter property takes precedence over prop:print-convert-constructor-name. If neither is attached to a structure type, its instances are converted using a constructor name that is make- prefixed onto the result of object-name.

The print-convert-named-constructor? predicate recognizes instances of structure types that have the prop:print-convert-constructor-name property, and print-convert-constructor-name extracts the property value.

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