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// Copyright (C) 2006-2009, 2012 Alexander Nasonov
// Copyright (C) 2012 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0
// (see accompanying file LICENSE_1_0.txt or a copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Home at http://www.boost.org/libs/scope_exit
#include <boost/config.hpp>
#ifdef BOOST_NO_CXX11_VARIADIC_MACROS
# error "variadic macros required"
#else
#include <boost/scope_exit.hpp>
#include <boost/typeof/typeof.hpp>
#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
#include <iostream>
struct file {
file(void) : open_(false) {}
file(char const* path) : open_(false) { open(path); }
void open(char const* path) { open_ = true; }
void close(void) { open_ = false; }
bool is_open(void) const { return open_; }
private:
bool open_;
};
BOOST_TYPEOF_REGISTER_TYPE(file)
void bad(void) {
//[try_catch_bad
file passwd;
try {
passwd.open("/etc/passwd");
// ...
passwd.close();
} catch(...) {
std::clog << "could not get user info" << std::endl;
if(passwd.is_open()) passwd.close();
throw;
}
//]
}
void good(void) {
//[try_catch_good
try {
file passwd("/etc/passwd");
BOOST_SCOPE_EXIT(&passwd) {
passwd.close();
} BOOST_SCOPE_EXIT_END
} catch(...) {
std::clog << "could not get user info" << std::endl;
throw;
}
//]
}
int main(void) {
bad();
good();
return 0;
}
#endif // variadic macros
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