chain

README

Chain

chain is a library for function chaning.

how to use

From

func main() {
	ch := chain.From[int, int](
		func(a int) int {
			return a + 1
		},
		func(a int) int {
			return a * 2
		},
		func(a int) int {
			return a * 3
		})

	switch ch.Ok() {
	case true:
		println(ch.Unwrap().Run(1))
	case false:
		println(ch.Err().Error())
	}
}

12

with wrong input & output matching

func main() {
	ch := chain.From[int, string](
		func(a int) int {
			return a + 1
		},
		func(a int) int {
			return a * 2
		},
		func(a int) int {
			return a * 3
		})

	switch ch.Ok() {
	case true:
		println(ch.Unwrap().Run(1))
	case false:
		println(ch.Err().Error())
	}
}

function's return type is invalid

WithResult

func main() {
	ch := chain.WithResult[int, int](
		result.ToFunctor(func(x int) (int, error) {
			return x + 1, nil
		}),
		result.ToFunctor(func(x int) (int, error) {
			return x * 2, nil
		}),
		result.ToFunctor(func(x int) (int, error) {
			return x + 1, nil
		}),
	)

	switch ch.Ok() {
	case true:
		rs := ch.Unwrap().Run(result.Ok(10))
		switch rs.Ok() {
		case true:
			println(rs.Unwrap())
		case false:
			println(rs.Err().Error())
		}
	case false:
		println(ch.Err().Error())
	}
}

23

Documentation

Index

• func From[T, R any](list ...any) *result.Result[*Chain[T, R]]
• func WithResult[T, R any](list ...any) *result.Result[*Chain[*result.Result[T], *result.Result[R]]]
• type Chain
  • func (c *Chain[T, R]) Run(param T) R

Functions

func From

func From[T, R any](list ...any) *result.Result[*Chain[T, R]]

func WithResult

func WithResult[T, R any](list ...any) *result.Result[*Chain[*result.Result[T], *result.Result[R]]]

Types

type Chain

type Chain[T, R any] struct {
	// contains filtered or unexported fields
}

func (*Chain[T, R]) Run

func (c *Chain[T, R]) Run(param T) R