Re: User-defined assignment

[mcsun!sunic!lth.se!newsuser@uunet.uu.net (Dag Bruck)]

In <comp.lang.ada> stt@spock.camb.inmet.com (Tucker Taft) writes:
>
>Array initializations are problem the worst, since these generally
>occur in a loop, and so the finalization would to be done
>for only those elements for which initialiation succeeded, requiring
>that the exception handler have a loop that depended on the state
>of the initialization loop at the time of the exception.

Arrays are built-in types in C++, so the initialization routine for
and array of Foo is part of the runtime library (typically).  Any
special handling to cope with partial construction is thus restricted
to this single vendor-supplied library routine.

An array library in C++, for example a library that provides index
range checking, would have to be carefully written to preserve the
desired behaviour in presence of exceptions.


		-- Dag