Utilities

Beyond the core functionality provided, variant includes a couple of utilities that may be beneficial.

HOI

Higher-Order Identity. A higher order factory for this very useful wrapper function.

ts
// Enforce the type constraint *and* narrow the return type.
function defineThing<T extends Template>(definition: T): T {
    return definition;
}

ts
// Enforce the type constraint *and* narrow the return type.
function defineThing<T extends Template>(definition: T): T {
    return definition;
}

The above defineThing can now be generated through

ts
const defineThing = HOI<Template>();

ts
const defineThing = HOI<Template>();

Identity<T>