7.7
power-struct
| (require power-struct) | package: power-struct |
Defines a struct form that implements default values and construction in an ergonomic manner.
Examples:
> (require power-struct) > (power-struct X (#:a 10 #:b 20) #:prefab) > (make-X #:b 9) '#s(X 10 9)
> (X-a (make-X #:b 9)) 10
Otherwise functions as a completely regular struct. The only difference is that we use keywords instead of ids.
syntax
(power-struct name maybe-super (kw-default ...) rest ...)
Defines a power-struct. The kw-default takes a single keyword and a default value. If the keyword is missing during construction in make-name, then the default value is used.
Normal struct accessors like name-id are generated.