1.72.10 Exception: exception handling

context

Return the execution context for the #on:do: snippet

isNested

Answer whether the current exception handler is within the scope of another handler for the same exception.

outer

Raise the exception that instantiated the receiver, passing the same parameters. If the receiver is resumable and the evaluated exception action resumes then the result returned from #outer will be the resumption value of the evaluated exception action. If the receiver is not resumable or if the exception action does not resume then this message will not return, and #outer will be equivalent to #pass.

pass

Yield control to the enclosing exception action for the receiver. Similar to #outer, but control does not return to the currently active exception handler.

resignalAs: replacementException

Reinstate all handlers and execute the handler for ‘replacementException’; control does not return to the currently active exception handler. The new Signal object that is created has the same contents as the receiver (this might or not be correct – if it isn’t you can use an idiom such as ‘sig retryUsing: [ replacementException signal ])

resume

If the exception is resumable, resume the execution of the block that raised the exception; the method that was used to signal the exception will answer the receiver. Use this method IF AND ONLY IF you know who caused the exception and if it is possible to resume it in that particular case

resume: anObject

If the exception is resumable, resume the execution of the block that raised the exception; the method that was used to signal the exception will answer anObject. Use this method IF AND ONLY IF you know who caused the exception and if it is possible to resume it in that particular case

retry

Re-execute the receiver of the #on:do: message. All handlers are reinstated: watch out, this can easily cause an infinite loop.

retryUsing: aBlock

Execute aBlock reinstating all handlers, and return its result from the #signal method.

return

Exit the #on:do: snippet, answering nil to its caller.

return: anObject

Exit the #on:do: snippet, answering anObject to its caller.