As I understand it, the correct term for that is "structural typing." Duck typing is similar, but applies exclusively to dynamic languages. See: https://en.wiki

As I understand it, the correct term for that is "structural typing." Duck typing is similar, but applies exclusively to dynamic languages. See: https://en.wikipedia.org/wiki/Duck_typing#Structural_type_systems https://en.wikipedia.org/wiki/Duck_typing#Structural_type_sy...