Syntax only distinguished by a relative order doesn't sound robust to me. In contemporary languages keyword arguments are a thing exactly because of that. Marg

Syntax only distinguished by a relative order doesn't sound robust to me. In contemporary languages keyword arguments are a thing exactly because of that. Marginally related example: many wiki syntaxes had a link syntax similar to `[[foo|bar]]`, where `foo` and `bar` can be either a label or a target and the order wildly varied across softwares---later lightweight markup languages had their lessons and used a different syntax for a label and a target (e.g. Markdown `[label](target)`).