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))