fdef

Define functions using haskell-like syntax

Usage example

(see it live at https://runkit.com/munizart/5bfef7ba07b85400123ee291)

const fdef = require('fdef')
const def = fdef('myNamespace')

const fib =
  def `fib ${0}` (() => 1)
  def `fib ${1}` (() => 1)
  def `fib ${Number}` (n => fib (n - 1) + fib (n - 2))

const fisrt10 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map(fib)
console.log(fisrt10) // [1, 1, 2, 3, 5, 8, 13, 21, 34, 55]

Documetation

fdef :: ( namespace: String ) => DefTemplateTag

fdef take a namespace and returns a def template tag used to define functions.

DefTemplateTag (def) :: ([name: String], types: ...Contructors) => ((...Constructors) => a) => Function

def `identifier ${TypeConstructor1} ${TypeConstructor2}` ((instanceOfType1, instanceOfType1) => {...})

Defines a implementation for identifier that matches positional arguments withing type constructors

DefTemplateTag (def) :: ([name: String], types: ...Contructors) => ((...LiteralValues) => a) => Function

def `identifier ${0} ${1}` ((zero, one) => {...})

Defines a implementation for identifier that matches the first param being 0 and the second being 1.

DefTemplateTag (def) :: ([name: String], types: ...Contructors) => ((...LiteralValues | Constructors) => a) => Function

def `identifier ${0} ${TypeConstructor2}` ((instanceOfType1, instanceOfType1) => {...})

Defines a implementation for identifier that matches the first param being 0 and the second being any instance of TypeConstructor2.