Mutually Exclusive Procedures in Imperative Languages

To represent mutually exclusive procedures, we propose a choice-conjunctive declaration statement of the form $uchoo(S,R)$ where $S, R$ are the procedure declaration statements within a module. This statement has the following semantics: request the machine to choose a successful one between $S$ and $R$. This statement is useful for representing objects with mutually exclusive procedures. We illustrate our idea via C^uchoo, an extension of the core C with a new statement.