»
transducer
transducer
(TA
type
, B type
, C type
, td Unary (Binary TA TA C) (Binary TA TA B)):
Any is
[Contains abstract features]
¶Type Parameters
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`
(rf Binary transducer.TA transducer.TA transducer.B) => Binary transducer.TA transducer.TA transducer.C[Contains abstract features]¶
(rf Binary transducer.TA transducer.TA transducer.B)
=>
Binary transducer.TA transducer.TA transducer.C[Contains abstract features]
¶use the transducer with reducing function `rf`.
(A type, o transducer transducer.TA A transducer.B) => transducer transducer.TA A transducer.C[Contains abstract features]¶
(A
type
, o transducer transducer.TA A transducer.B) =>
transducer transducer.TA A transducer.C[Contains abstract features]
¶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 hierarchy 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 hierarchy of types. So for Type values, dynamic_type is redefined
to just return Type.type.
(A type, o transducer transducer.TA A transducer.B) => transducer transducer.TA A transducer.C[Contains abstract features]¶
(A
type
, o transducer transducer.TA A transducer.B) =>
transducer transducer.TA A transducer.C[Contains abstract features]
¶left-to-right composition of transducers
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 Functions
string representation of this type to be used for debugging.
result has the form "Type of '<name>'", but this might change in the future
result has the form "Type of '<name>'", but this might change in the future
There is no dynamic type of a type instance since this would result in an
endless hierarchy of types, so dynamic_type is redefined to just return
Type.type here.
endless hierarchy of types, so dynamic_type is redefined to just return
Type.type here.
(predicate Unary bool transducer.type.B) => transducer transducer.type.TA transducer.type.B transducer.type.B[Contains abstract features]¶
(predicate Unary bool transducer.type.B)
=>
transducer transducer.type.TA transducer.type.B transducer.type.B[Contains abstract features]
¶a transducer filtering values based on evaluation of predicate
Is this type assignable to a type parameter with constraint `T`?
The result of this is a compile-time constant that can be used to specialize
code for a particular type.
is_of_integer_type(n T : numeric) => T : integer
say (is_of_integer_type 1234) # true
say (is_of_integer_type 3.14) # false
it is most useful in conjunction preconditions or `if` statements as in
pair(a,b T) is
same
pre T : property.equatable
=>
a = b
or
val(n T) is
The result of this is a compile-time constant that can be used to specialize
code for a particular type.
is_of_integer_type(n T : numeric) => T : integer
say (is_of_integer_type 1234) # true
say (is_of_integer_type 3.14) # false
it is most useful in conjunction preconditions or `if` statements as in
pair(a,b T) is
same
pre T : property.equatable
=>
a = b
or
val(n T) is
(mapper Unary transducer.type.B transducer.type.C) => transducer transducer.type.TA transducer.type.B transducer.type.C[Contains abstract features]¶
(mapper Unary transducer.type.B transducer.type.C)
=>
transducer transducer.type.TA transducer.type.B transducer.type.C[Contains abstract features]
¶a transducer mapping values from C to B
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.
NYI: Redefinition allows the type feature to be distinguished from its normal counterpart, see #3913
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.
NYI: Redefinition allows the type feature to be distinguished from its normal counterpart, see #3913
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`.
0.094dev (2025-06-18 15:08:51 GIT hash 89cffc23ae669b0898a5564fefbf793fcb8e5ca7 built by fridi@fzen)
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