Function generate_from_macro 

pub fn generate_from_macro(input: TokenStream) -> TokenStream

Parse gen_any_codelet!(N) input and dispatch.

Syntax

gen_any_codelet!(8);    // size-8, generates codelet_any_8
gen_any_codelet!(15);   // size-15, runtime-delegating wrapper
gen_any_codelet!(2003); // size-2003, Bluestein runtime wrapper

Returns a compile_error! token stream on parse or codegen failure.