prefixed.h

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#pragma once

#include <string>
#include <iostream>
#include <functional>
#include <scl/tools/iostream/nl.h>
#include <scl/macros.h>

namespace scl{
    namespace tools{
        namespace iostream{
            namespace log{
                namespace prefixed{
                    template <class T=std::string>
                    inline std::function<decltype(std::cout)&(const T&)> log(realConst(char*) prefix){
                        decltype(std::cout)* cout = &std::cout;
                        return [=](const T& value) -> decltype(std::cout)&{
                            return (*cout) << prefix << value << nl;
                        };
                    }

                    template <class T=std::string>
                    inline std::function<decltype(std::cerr)&(const T&)> error(realConst(char*) prefix){
                        decltype(std::cerr)* cerr = &std::cerr;
                        return [=](const T& value) -> decltype(std::cerr)&{
                            return (*cerr) << prefix << value << nl;
                        };
                    }
                }
            }
        }
    }
}