There was a post here not long ago, by jerf iirc, called something like 'tiny types in go.' At the time I disagreed with the premise, but I think it would be a

There was a post here not long ago, by jerf iirc, called something like 'tiny types in go.' At the time I disagreed with the premise, but I think it would be a cleaner solution here. By aliasing two string types with obvious names, it forces you to convert at calltime. Assuming you name source and dest as types(ie type source string), you end up with a command like copy(source(sourcefile), dest(destfile)). It's cleaner and has less abstraction than what's in the article.