WebNote that only `.' is defined by standard Scheme -- the other keywords are MIT Scheme extensions. `#!rest' has the same meaning as `.' in formals. ... The modifier is a procedure of two arguments, the first of which must be a record of … WebDefines a record type. Type is mangled to the C struct type name (type-descriptor-name is unused unless running Pre-Scheme as Scheme). Constructor is defined to construct a record of the new type and initialize the fields argument …
define-record-type (SRFI 9) (MIT/GNU Scheme 12.1)
http://www.scheme-reports.org/mail/scheme-reports/msg03509.html WebFor example: (define-record-type lambda make-lambda lambda? body parameters) may or may not work depending on the syntax binding of the record name (certainly does NOT work on R6RS). IMO, for non-inheritable records, the name is never needed except when the macro is expanded, and should not litter the namespace. brosse inava 7/100
Scheme Programming/Record Types - Wikibooks, open books for …
WebNotice above that if a property only requires a type, it can be specified using a shorthand notation (contrast the title property above with the date property). Keys may also be assigned nested objects containing further key/type definitions like the … WebJan 1, 2024 · 1 Answer. Sorted by: 1. You can construct a -set! mutator from the given accessor. This can be done by converting the symbol for the accessor to a string and … WebApr 16, 2024 · The predicate for this disjoint data type is stack? and its constructor is list->stack. The structure of define-record-type will be fully explained in a future R7RS lesson, … brosse inava 20/100