Hi, one of my most common struggles when writing macros, is that it is not easy
to compose the export marker `*` in my macro's syntax. For example:
activations:
act sigmoid*:
fn: 1 / (1 + exp(-x))
deriv: fx * (1 - fx)
act tanh*:
fn: tanh(x)
deriv: (let t = tanh(fx); 1 - t * t)
# Fails to parse, with error: expected expression but found ':'
Run
This is because postfix operators are not allowed and `*` is a special case. So
a workaround is to use an infix notation: `act* tanh:`. Is there anything else
that can be done about it? What's your opinions?
