var genfun = require('./')

var multiply = function(a, b) {

return a * b

}

var addAndMultiplyNumber = function(val) {

var fn = genfun()
  ('function(n) {')
    ('if (typeof n !== "number") {') // ending a line with { will indent the source
      ('throw new Error("argument should be a number")')
    ('}')
    ('var result = multiply(%d, n+%d)', val, val)
    ('return result')
  ('}')

// use fn.toString() if you want to see the generated source

return fn.toFunction({
  multiply: multiply
})

}

var addAndMultiply2 = addAndMultiplyNumber(2)

console.log(addAndMultiply2.toString()) console.log('(3 + 2) * 2 =', addAndMultiply2(3))