Boost

Boost.Foreach

In C++, writing a loop that iterates over a sequence is tedious. We can either use iterators, which requires a considerable amount of boiler-plate, or we can use the std::for_each() algorithm and move our loop body into a predicate, which requires no less boiler-plate and forces us to move our logic far from where it will be used. In contrast, some other languages, like Perl, provide a dedicated "foreach" construct that automates this process. BOOST_FOREACH is just such a construct for C++. It iterates over sequences for us, freeing us from having to deal directly with iterators or write predicates.

About Boost.Foreach

int main()
{
    net::io_context ioc;
    tcp::resolver resolver(ioc);
    beast::tcp_stream stream(ioc);

    stream.connect(resolver.resolve("example.com", "80"));

    http::request<http::empty_body> req{http::verb::get, "/", 11};
    req.set(http::field::host, "example.com");

    http::write(stream, req);

    beast::flat_buffer buffer;
    http::response<http::string_body> res;
    http::read(stream, buffer, res);

    std::cout << res << std::endl;
}

Install

Get started with header-only libraries

brew install openssl
export OPENSSL_ROOT=$(brew --prefix openssl)
# install bjam tool user specific configuration file to read OPENSSL_ROOT
# see https://www.bfgroup.xyz/b2/manual/release/index.html
cp ./libs/beast/tools/user-config.jam $HOME