(Related: Line Identifier Validation)
Normally (in this latest version of BAM), an invalid line number/label in a GOTO / GOSUB / RESTORE statement, when encountered, will cause a program to immediately end with an error.
For GOTO / GOSUB / RESTORE in the following scenarios, it would normally make sense for the program to immediately end with an error:
- IF THEN line-number ELSE line-number
- IF GOTO line-number/label ELSE line-number/label
- GOTO line-number/label
- GOSUB line-number/label
- RESTORE line-number/label
- ON ... GOTO
- ON ... GOSUB
- ON ... RESTORE
However, when a GOTO / GOSUB / RESTORE statement uses the EVAL clause, there may be scenarios in which dynamically generated line numbers/labels ought to be validated beforehand, allowing the program to do some error handling that prevents abnormal end of the program.
