in golang I can write a function and call that function in the next line of the same file. the body of the function is reusable in terraform I can't do this d

in golang I can write a function and call that function in the next line of the same file. the body of the function is reusable in terraform I can't do this don't get me wrong, terraform is a great accomplishment. BUT there are normal 'every programming language does this' features that would make it better re 'design decision not a technical limitation' -- design decision by the designer of the tool, technical limitation on me