/
bifunction.go
57 lines (44 loc) · 1.46 KB
/
bifunction.go
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package fn
type BiFunction[T any, U any, R any] interface {
Apply(T, U) R
CheckedApply(T, U) (R, error)
Curry() func(T) Function[U, R]
Partial(T) Function[U, R]
}
type BiFunctionFn[T any, U any, R any] func(T, U) R
func (fn BiFunctionFn[T, U, R]) Apply(t T, u U) R {
return fn(t, u)
}
func (fn BiFunctionFn[T, U, R]) CheckedApply(t T, u U) (R, error) {
return fn.Apply(t, u), nil
}
func (fn BiFunctionFn[T, U, R]) Curry() func(T) Function[U, R] {
return func(t T) Function[U, R] {
return FunctionOf(func(u U) R { return fn(t, u) })
}
}
func (fn BiFunctionFn[T, U, R]) Partial(t T) Function[U, R] {
return FunctionOf(func(u U) R { return fn(t, u) })
}
type BiFunctionCheckedFn[T any, U any, R any] func(T, U) (R, error)
func (fn BiFunctionCheckedFn[T, U, R]) Apply(t T, u U) R {
r, _ := fn.CheckedApply(t, u)
return r
}
func (fn BiFunctionCheckedFn[T, U, R]) CheckedApply(t T, u U) (R, error) {
return fn(t, u)
}
func (fn BiFunctionCheckedFn[T, U, R]) Curry() func(T) Function[U, R] {
return func(t T) Function[U, R] {
return FunctionCast(func(u U) (R, error) { return fn(t, u) })
}
}
func (fn BiFunctionCheckedFn[T, U, R]) Partial(t T) Function[U, R] {
return FunctionCast(func(u U) (R, error) { return fn(t, u) })
}
func BiFunctionOf[T any, U any, R any](fn func(T, U) R) BiFunction[T, U, R] {
return BiFunctionFn[T, U, R](fn)
}
func BiFunctionCast[T any, U any, R any](fn func(T, U) (R, error)) BiFunction[T, U, R] {
return BiFunctionCheckedFn[T, U, R](fn)
}