A tuple type with literal types inferred from the arguments
The elements to include in the tuple (variadic)
A readonly tuple containing the provided arguments with preserved literal types
// Create a tuple with literal types preserved
const coordinates = tp(10, 20, 30);
expectType<typeof coordinates, readonly [10, 20, 30]>('=');
expectType<typeof coordinates, readonly number[]>('!=');
assert.deepStrictEqual(coordinates, [10, 20, 30]);
// The following two are equivalent
const a = tp(1, 2);
const b = [1, 2] as const;
expectType<typeof a, typeof b>('=');
assert.deepStrictEqual(a, b);
// Without tp, type would be number[]
const point = tp('x', 42, true);
expectType<typeof point, readonly ['x', 42, true]>('=');
assert.deepStrictEqual(point, ['x', 42, true]);
// Useful for creating const tuples
const rgb = tp(255, 128, 0);
expectType<typeof rgb, readonly [255, 128, 0]>('=');
assert(rgb[0] === 255);
assert(rgb[1] === 128);
assert(rgb[2] === 0);
Creates a readonly tuple from the given arguments with precise literal type inference. It is a convenient shorthand for
[...args] as const.