Class: MessageNotUnderstood

• Inheritance
• Description
• Class protocol
  • initialization
  • save evaluation
• Instance protocol
  • accessing
  • printing & storing

Inheritance:

   Object
   |
   +--GenericException
      |
      +--Exception
         |
         +--Error
            |
            +--ProceedableError
               |
               +--ExecutionError
                  |
                  +--MessageNotUnderstood

Package:

stx:libbasic

Category:

Kernel-Exceptions-Errors

Version:

rev: 1.24 date: 2019/05/08 01:11:14

user: cg

file: MessageNotUnderstood.st directory: libbasic

module: stx stc-classLibrary: libbasic

Description:

raised when a message is sent to an object, which is not understood
by the receiver, and the message was not handled by a class specific
doesNotUnderstand: handler.

Class protocol:

 initialize

self initialize

 ignoreNotUnderstoodOf: aSelector in: aBlock

evaluate aBlock; if a messageNotUnderstood occurs,
for which the message was aSelector, ignore the error
and return.
Other selector errors lead into the debugger.
If no error occurs, return the block's value

 ignoreNotUnderstoodOfAny: aCollectionOfSelectors in: aBlock

evaluate aBlock; if a messageNotUnderstood occurs,
for which the message was any in aCollectionOfSelectors, ignore the error
and return.
Other selector errors lead into the debugger.
If no error occurs, return the block's value

Instance protocol:

 message

[
123 perform:#foo
] on:MessageNotUnderstood do:[:ex |
Transcript show:'message object: '; showCR:ex message storeString.
Transcript show:'receiver: '; showCR:ex receiver storeString.
Transcript show:'selector: '; showCR:ex message selector storeString.
Transcript show:'arguments: '; showCR:ex message arguments storeString.
]

 receiver

[
123 perform:#foo
] on:MessageNotUnderstood do:[:ex |
Transcript showCR:ex receiver
]

 selector

[
123 perform:#foo
] on:MessageNotUnderstood do:[:ex |
Transcript show:'selector: '; showCR:ex selector storeString.
]

 description

the human readable description of the exception

usage example(s):

description := sel, ' not understood by ' , description.

usage example(s):

description := sel printString, ' (nonSymbol) not understood by ' , description.