Consts

Procs

proc isOperator(x: char): bool {....raises: [], tags: [], forbids: [].}: Proc isOperator's wrapper for char.
proc isOperator(x: string): bool {....raises: [], tags: [], forbids: [].}: Returns true is x is a string corresponds to one of the operators, and false otherwise.
proc isParen(x: char): bool {....raises: [], tags: [], forbids: [].}: Proc isParen's wrapper for char.
proc isParen(x: string): bool {....raises: [], tags: [], forbids: [].}: Returns true is x is left paren or right paren, and false otherwise.