I agree with this article. Tuples nicely unified multiple return values and multiple parameters. FWIW Scala and Virgil both support the _ syntax for the placeholder in a partial application.

    def add(x: int, y: int) -> int { return x + y; }
    def add3 = add(_, 3);

Or more simply, reusing some built-in functions:

    def add3 = int.+(_, 3);