Predefined exceptions in the standard library

ABS provides predefined exceptions that are thrown in specific circumstances. See Exceptions for information about exceptions.

Note

This list is subject to revision in future versions of ABS. Not all these exceptions are currently thrown by different backends in the described situation.

DivisionByZeroException

Raised in arithmetic expressions when the divisor (denominator) is equal to 0, as in +3/0+

AssertionFailException

The assert statement was called with an argument that evaluated to False.

PatternMatchFailException

A value did not match any pattern in a pattern-matching expression.

NullPointerException

A method was called on null, or await or get were passed a null future.

StackOverflowException

The calling stack has reached its limit (system error)

HeapOverflowException

The memory heap is full (system error)

KeyboardInterruptException

The user pressed a key sequence to interrupt the running ABS program

ObjectDeadException

A method was called on a dead (crashed) object