(aspell-dev.info.gz) Error Handling

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 5 Error Handling
 ****************
 
 Exceptions are not used in Aspell as I find them more trouble than they
 are worth.  Instead an alternate method of error handling is used which
 is based around the PosibErr class.  PosibErr is a special Error
 handling device that will make sure that an error is properly handled.
 It is defined in `posib_err.hpp'.  PosibErr is expected to be used as
 the return type of the function. It will automatically be converted to
 the "normal" return type however if the normal returned type is
 accessed and there is an "unhandled" error condition it will abort. It
 will also abort if the object is destroyed with an "unhandled" error
 condition.  This includes ignoring the return type of a function
 returning an error condition.  An error condition is handled by simply
 checking for the presence of an error, calling ignore, or taking
 ownership of the error.
 
    The PosibErr class is used extensively throughout Aspell.  Please
 refer to the Aspell source for examples of using PosibErr until better
 documentation is written.

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