Exception thrown by handler unexpected
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bad_exception |
This is a special type of exception specifically designed to be listed in the exception-specification of a function (i.e., in its throw specifier).
If a function with bad_exception listed in its exception-specification throws an exception not listed in it and unexpected rethrows it (or throws any other exception also not in the exception-specification), a bad_exception is automatically thrown.
Its member what returns a null-terminated character sequence identifying the exception.
Example
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// bad_exception example
#include <iostream>
#include <exception>
using namespace std;
void myunexpected () {
cerr << "unexpected handler called\n";
throw;
}
void myfunction () throw (int,bad_exception) {
throw 'x'; // throws char (not in exception-specification)
}
int main (void) {
set_unexpected (myunexpected);
try {
myfunction();
}
catch (int) { cerr << "caught int\n"; }
catch (bad_exception be) { cerr << "caught bad_exception\n"; }
catch (...) { cerr << "caught other exception (non-compliant compiler?)\n"; }
return 0;
}
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Output:
unexpected handler called
caught bad_exception
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See also
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