☰
transducer
transducer
§(TA type, B type, C type, td Unary (Function transducer.TA transducer.TA transducer.C) (Function transducer.TA transducer.TA transducer.B)):Any is
§(TA
type
, B type
, C type
, td Unary (Function transducer.TA transducer.TA transducer.C) (Function transducer.TA transducer.TA transducer.B)):
Any is
Functions
create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`
create `"instance[T]"` where `T` is the dynamic type of `a`
use the transducer with reducing function `rf`.
left-to-right composition of transducers
Get the dynamic type of this instance. For value instances `x`, this is
equal to `type_of x`, but for `x` with a `ref` type `x.dynamic_type` gives
the actual runtime type, while `type_of x` results in the static
compile-time type.
There is no dynamic type of a type instance since this would result in an
endless hierachy of types. So for Type values, dynamic_type is redefined
to just return Type.type.
equal to `type_of x`, but for `x` with a `ref` type `x.dynamic_type` gives
the actual runtime type, while `type_of x` results in the static
compile-time type.
There is no dynamic type of a type instance since this would result in an
endless hierachy of types. So for Type values, dynamic_type is redefined
to just return Type.type.
left-to-right composition of transducers
name of this type, including type parameters, e.g. 'option (list i32)'.
convenience prefix operator to create a string from a value.
This permits usage of `$` as a prefix operator in a similar way both
inside and outside of constant strings: $x and "$x" will produce the
same string.
This permits usage of `$` as a prefix operator in a similar way both
inside and outside of constant strings: $x and "$x" will produce the
same string.
Type Features
a transducer filtering values based on evaluation of predicate
a transducer mapping values from C to B
Get a type as a value.
This is a feature with the effect equivalent to Fuzion's `expr.type` call tail.
It is recommended to use `expr.type` and not `expr.type_value`.
`type_value` is here to show how this can be implemented and to illustrate the
difference to `dynamic_type`.
This is a feature with the effect equivalent to Fuzion's `expr.type` call tail.
It is recommended to use `expr.type` and not `expr.type_value`.
`type_value` is here to show how this can be implemented and to illustrate the
difference to `dynamic_type`.
another reducing function. this enables composition
and reuse of map, filter, reduce etc.
see https://clojure.org/reference/transducers
for in depth information on transducers
usage example:
human(age i32) is
td := (transducer (Sequence i32) i32 human).type
ages := td.map (x -> x.age)
gt_ten := td.filter (x -> x > 10)
xf := ages ∘ gt_ten
say ([human 4, human 12, human 30].into xf) # [12,30]
TA result type
B input type
C transduced type