Exceptions_module

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Modules
	Exceptions_module_internal_classes
	Internal Exceptions_module classes and functions.

Classes
class	casacore::AipsError
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class	casacore::AllocError
	Allocation errors. More...
class	casacore::IndexError
	Base class for all indexing errors. More...
class	casacore::indexError< t >
	Index errors returning the bad index. More...
class	casacore::DuplError
	Duplicate key errors. More...
class	casacore::duplError< t >
	Duplicate key errors where the bad key is returned. More...
class	casacore::SystemCallError
	Exception for an error in a system call. More...
class	casacore::AbortError
	Exception which halts execution. More...
class	casacore::InitError
	Initialization error, typically of static data shared between objects. More...

Detailed Description

Exception handling

See below for an overview of the classes in this module.

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Synopsis

This module provides the exception handling mechanism used in Casacore. It allows the user to define new exception types and to throw, catch, and rethrow these exceptions. The interface to this exception handling mechanism is very similary to the ANSI standard exceptions. This will make it easy to switch when the time comes.

This module supplies several (see (file="Error.h"))common exception types. These provide examples for creating new errors.

At some point, this exception mechanism will probably be replaced with compiler supported exceptions.

Example

This example shows how a more specific exception can be caught as a more general exception:

#include <casacore/casa/Exceptions.h>
#include <iostream>
main() {
try {
throw(indexError<int>(5,"Dummy error"));
} catch (IndexError xx) {
cout << "caught IndexError" << endl;
} 
}