es6-tagged-template-fun.js

'use strict';

let assert = (condition) => { 
  if (!condition) throw new Error('assertion error')
}

let sum = (_,a,b) => a+b
let mul = (_,a,b) => a*b
let sub = (_,a,b) => a-b
let div = (_,a,b) => a/b
let rem = (_,a,b) => a%b

assert( sum`${1} ${2}` == 3 ) 
assert( mul`${3} ${4}` == 12 )
assert( sub`${6.5} ${3}` == 3.5 )
assert( div`${15} ${3}` == 5 )
assert( rem`${12} ${5}` == 2 )

let result = div`${
              sub`${
                mul`${
                  sum`${1} ${2}
                `} ${2}
              `} ${1}`
            } ${2}`

assert( result == (((1+2)*2)-1)/2 )