INPUT Execution – Temporary Values

The values parsed from the entered input to be assigned to the input variables need to be stored somewhere other than the evaluation stack. The logical place is another temporary input values stack. This stack will be allocated and initialized in the get input routine and will be removed by the final INPUT command code.

After a value is parsed by one of the input parse codes, it will be saved (pushed) to a temporary input values stack. At the last input parse code (with the 'End' sub-code), an index to be used to access this stack will be set to zero. As each value is assigned by an input assign code, this index will be incremented. In other words, this stack is being used as First-In-First-Out out list instead of a Last-In-First-Out standard stack.

The SimpleStack (to be renamed to just Stack since there is no other class named Stack), does not currently have this mechanism. This will be added when the run-time code implemented, but it is not needed currently for translating the INPUT command, so this addition will wait.