In C++ throw;
when executed inside a catch block rethrows the currently caught exception outside the block.
In this answer an idea of exception dispatcher is brought up as a solution to reducing code duplication when using complex exception handling often:
try {
CodeThatMightThrow();
} catch(...) {
ExceptionHandler();
}
void ExceptionHandler()
{
try {
throw;
} catch( FileException* e ) {
//do handling with some complex logic
delete e;
} catch( GenericException* e ) {
//do handling with other complex logic
delete e;
}
}
Throwing a pointer or a value doesn't make any difference so it's out of the question.
What happens if ExceptionHandler() is called not from a catch block?
I tried this code with VC7:
int main( int, char** )
{
try {
throw;
} catch( ... ) {
MessageBox( 0, "", "", 0 );
}
return 0;
}
First it causes the debugger to indicate a first-chance exception, then immediately an unhandled exception. If I run this code outside the debugger the program crashes the same way as if abort() has been called.
What is the expected behaviour for such situations?
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