Documentation
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Overview ¶
Package partial provides helpers for partial function application.
Each function in this package has a suffix for arity that indicates the number of arguments of the provided input function f.
Each Left/Right function returns a function with a single argument that can be used to "partially apply" input function f with one argument already bound.
Functions have the prefix "Left" if they bind the left-most argument first, or "Right" if they bind the right-most argument first.
Each input function must return exactly one value. The "fun/result" and "fun/maybe" packages provide useful functions that can wrap functions that return (value, ok) or (value, error) result types into single-value return variants.
For example,
f(a, b, c) => x becomes g(b, c) => x, with a bound, by calling Left3(f)(a).
f(a, b, c) => x becomes g(a, b) => x, with c bound, by calling Right3(f)(c).
f(a, b, c) => x becomes g() => x, with a, b, and c bound, by calling All3(f)(a, b, c).
f(a) => x becomes g() => x, with a bound, by calling Single(f)(a).
Index ¶
- func All2[A any, B any, Return any](f func(A, B) Return) func(A, B) func() Return
- func All3[A any, B any, C any, Return any](f func(A, B, C) Return) func(A, B, C) func() Return
- func All4[A any, B any, C any, D any, Return any](f func(A, B, C, D) Return) func(A, B, C, D) func() Return
- func Left2[A any, B any, Return any](f func(a A, b B) Return) func(a A) func(b B) Return
- func Left3[A any, B any, C any, Return any](f func(a A, b B, c C) Return) func(a A) func(b B, c C) Return
- func Left4[A any, B any, C any, D any, Return any](f func(a A, b B, c C, d D) Return) func(a A) func(b B, c C, d D) Return
- func Right2[A any, B any, Return any](f func(a A, b B) Return) func(b B) func(a A) Return
- func Right3[A any, B any, C any, Return any](f func(a A, b B, c C) Return) func(c C) func(a A, b B) Return
- func Right4[A any, B any, C any, D any, Return any](f func(a A, b B, c C, d D) Return) func(d D) func(a A, b B, c C) Return
- func Single[T any, Return any](f func(t T) Return) func(t T) func() Return
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func Single ¶ added in v2.2.0
Single takes a function with a single argument and return value and constructs a function that takes a single argument and returns a function that takes no arguments and returns a single value.
For example,
opener := partial.Single(result.WrapFunc(os.Open))
fooOpener := opener("foo.txt")
f, err := fooOpener().Unpack()
Types ¶
This section is empty.
Source Files