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Nicola Musatti
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 Posted: Fri Mar 03, 2006 5:39 pm Post subject: catch by reference and private conversion operator |
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Hallo,
In experimenting on the design of an exception that cannot be caught I
wrote the following program:
class A {
operator A& ();
};
int main() {
try {
throw A();
}
catch ( A & a ) {
}
}
I expected it to generate an error, but to my surprise two out of my
three compilers accept this code. Who's right?
Thank you,
Nicola Musatti
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Alberto Ganesh Barbati
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| Posted: Sun Mar 05, 2006 2:06 am Post subject: Re: catch by reference and private conversion operator |
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Nicola Musatti ha scritto:
| Quote: | Hallo,
In experimenting on the design of an exception that cannot be caught I
wrote the following program:
class A {
operator A& ();
};
int main() {
try {
throw A();
}
catch ( A & a ) {
}
}
I expected it to generate an error, but to my surprise two out of my
three compilers accept this code. Who's right?
|
Why do you expect it to generate an error? I would have said the
opposite, because AFAIK binding an object of type A to an A& is a
"direct binding" and thus it won't involve a call to operator A&().
Moreover 15.3/3 does not consider the presence of conversion operators
when matching handlers to exception objects.
Which compiler gives the error and which error it is?
Ganesh
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[ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ]
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