modern-cpp-tutorial/code/9/9.1.noexcept.cpp

//
// 9.1.noexcept.cpp
// chapter 09 others
// modern c++ tutorial
//
// created by changkun at changkun.de
// https://github.com/changkun/modern-cpp-tutorial
//

#include <iostream>

void may_throw() {
    throw true;
}
auto non_block_throw = []{
    may_throw();
};
void no_throw() noexcept {
    return;
}

auto block_throw = []() noexcept {
    no_throw();
};

int main()
{
    std::cout << std::boolalpha
    << "may_throw() noexcept? " << noexcept(may_throw()) << std::endl
    << "no_throw() noexcept? " << noexcept(no_throw()) << std::endl
    << "lmay_throw() noexcept? " << noexcept(non_block_throw()) << std::endl
    << "lno_throw() noexcept? " << noexcept(block_throw()) << std::endl;
    
    try {
        may_throw();
    } catch (...) {
        std::cout << "exception captured from my_throw()" << std::endl;
    }
    
    try {
        non_block_throw();
    } catch (...) {
        std::cout << "exception captured from non_block_throw()" << std::endl;
    }
    
    try {
        block_throw();
    } catch (...) {
        std::cout << "exception captured from block_throw()" << std::endl;
    }
}