Completely missed your point in a sibling reply, let me try again. Returning a function pointer should be ok, chain syntax is a sugaring which is probably not

Completely missed your point in a sibling reply, let me try again. Returning a function pointer should be ok, chain syntax is a sugaring which is probably not high-payoff in an embedded language. So would explicitly capture the pointer as a stack variable and then use it, three parentheses would be illegal instead of ambiguous. Seems reasonable to me.