Exception handling syntax: Difference between revisions

Revision as of 16:17, 7 January 2007

Revision as of 10:06, 8 January 2007

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=== [[Ada (programming language)|Ada]] ===

{{wikibooks|Ada Programming|Exceptions}}

==== Exception declarations ====

Some_Error : '''exception''';

==== Raising exceptions ====

'''raise''' Some_Error '''with''' "Out of memory";

==== Exception handling and propagation ====

with Ada.Exceptions; use Ada.Exceptions;

'''procedure''' Foo '''is'''

'''begin'''

Do_Something_Interesting;

''-- Start of exception declaration''

'''exception'''

'''when''' Constraint_Error =>

''-- Handle constraint error''

'''when''' Storage_Error =>

''-- Propagate the Storage_Error as different exception with some useful message''

'''raise''' Some_Error '''with''' "Out of memory";

'''when''' Error : '''others''' =>

''-- Handle all others''

Put ("Exception: ");

Put_Line (Exception_Name (Error));

Put (Exception_Message (Error));

'''end''' Foo;

For a more complete discussion of exceptions in Ada see [[:Wikibooks:Ada Programming/Exceptions|the wikibook on Ada]].