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const genfun = require('./')
const { d } = genfun.formats
function multiply (a, b) {
return a * b
}
function addAndMultiplyNumber (val) {
const fn = genfun(`
function (n) {
if (typeof n !== 'number') {
throw new Error('argument should be a number')
}
const result = multiply(${d(val)}, n + ${d(val)})
return result
}
`)
// use fn.toString() if you want to see the generated source
return fn.toFunction({multiply})
}
const addAndMultiply2 = addAndMultiplyNumber(2)
console.log(addAndMultiply2.toString())
console.log('(3 + 2) * 2 =', addAndMultiply2(3))
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