functionalscript/types/function/compare/test.f.js

FunctionalScript is a purely functional subset of JavaScript

import { cmp } from "./module.f.js";
export default () => {
    {
        const result = cmp(true)(false);
        if (result !== 1) {
            throw result;
        }
        const _ = true < false;
    }
    {
        const result = cmp(1)(2);
        if (result !== -1) {
            throw result;
        }
        const _ = 1 < 2;
    }
    {
        const result = cmp(2n)(-10n);
        if (result !== 1) {
            throw result;
        }
        const _ = 2n < -10n;
    }
    {
        const result = cmp("hello")("hello");
        if (result !== 0) {
            throw result;
        }
        const _ = "hello" < "hello";
    }
    {
        // const result = cmp(true)("hello") // compilation error
        const a = "hello";
        const b = 5;
        // const _ = cmp(a)(b) // compilation error
        const _ = cmp(a)("hello"); // ??? TypeScript changes a type definition of `a`.
        // const f = (a: string|number, b: string|number) => cmp(a)(b) // compilation error
        // const f = (a: number, b: string|number) => cmp(a)(b) // compilation error
    }
};