level argument for assert

[Thijs Schreijer <thijs@...>]

The error function is defined as;
    error (message [, level])

The assert function is defined as;
    assert (v [, message])

Is there a specific reason the assert function doesn't have a 'level' argument that allows to throw the error up some levels? Eg. have assert defined as;
    assert (v [, message [, level]])

Currently I use;
    if not v then error(message, level) end

But I would prefer the shorter assert notation

Thijs