Module function_gen 

Function pieces, specifically Function which is composed of FunctionSignature and FunctionBody. Naturally, a Function can be used as a “method” for another object, by specifying self (or some variant of it) as the first Parameter to a Function object.

Structs

Function

Represents a function or method. Determined if any Parameter contains self

FunctionBody

Represents the function/method’s body

FunctionSignature

Represents a function/method signature in source code

Parameter

Represents a single parameter to a Function