Appendix A: Keywords

In Tokay, the following keywords are reserved words for control structures, values and special operators.

• accept - accept parselet, optionally with a return value
• begin - sequence to execute at begining of a parselet
• break - break from a loop, optonally with a return value
• continue - restart iteration in a loop
• else - fallback for if constructs
• end - sequence to execute at end of a parselet
• exit - stop program execution, optional with exit code
• expect - operator for consumable that expects the consumable and throws an error if not present
• false - the false value
• for - head-controlled for loop
• if - branch based on the result of a conditional expression
• in - part of the for-loop syntax
• loop - head-controlled loop with an optional abort conition
• next - continue with next sequence in a block
• not - operator for consumable that satisfies when the consumable is not consumed
• null - the null value
• peek - operator for consumable that satisfies when consumable is consumed but the reader rolls back afterwards
• push - accept a sequence by pushing a value
• reject - reject parselet as not being consumed
• repeat - repeat parselet, optionally push a result
• return - same like accept, but with a meaning for ordinary functions
• true - the true value
• void - the void value