> no-op if already defined Why shouldn't it be a compile-time error, in the same way as your suggested `def foo;`? I can't think of a legitimate reason for wa

> no-op if already defined Why shouldn't it be a compile-time error, in the same way as your suggested `def foo;`? I can't think of a legitimate reason for wanting to write an intentional no-op (at least at the level of PHP; obviously assembly etc. is a different ballpark entirely).