kaihsin / CKwarg

C++ kwarg

#python like Kwarg in c++

Requirement:

- boost (hana)
- c++14 or higher

To use:

This is a simple head-only library. Simply include ckwarg.hpp

example for using:

Consider a original c++ function foo, we want to use kwargs like python. 
First, wrapping the function to a lambda, by calling adapt(), with registered keywords.
Then, the function can be called via "<keyword>"_arg = <value>.

    #include "ckwarg.hpp"

    static int foo(int a, float b, std::string const &c){
        return (c.size()+a)/b;
    }
    // wrapping helping:
    auto my_foo = adapt(foo,"ta"_arg,"tb"_arg,"tc"_arg);


    int main(){

        // using:
        std::cout <<  my_foo(
                        "tc"_arg = "hello world",
                        "tb"_arg = 0.5,
                        "ta"_arg = 10
                    );

        return 0;
    }

Full example, see main.cpp, use Makefile to build this simple example

Developer:

Kai-Hsin Wu

Reference:

Named Arguments From Scratch by Richard Powell: 
    https://github.com/CppCon/CppCon2018/tree/master/Presentations/named_arguements_from_scratch