Function Composition in LispRule (for λ-nomic)

(:= "."
    (func (comb "f" "g")  // `comb` produces a list, akin to R's `c`
        (func (accepts g)  // `accepts` gets the arguments that its argument function accepts
            (f (apply g (args)))  // args is a variable that represents the args passed to the current function
        )
    )
)