curry ts

//c-curry
type CSum = (a: number) => (b: number) => number;
const csum: CSum = a => b => a + b;

console.assert(csum(5)(6) == 11)


type Incrementer = (x: number) => number;
const inc: Incrementer = csum(1);
console.assert(inc(5) == 6)


type Decrementer = (x: number) => number;
const dec: Decrementer = csum(-1);
console.assert(dec(6) == 5)