Created
December 11, 2014 18:45
-
-
Save bzar/406cddabeff450e988cb to your computer and use it in GitHub Desktop.
A tuple of containers with compile-time seek by type in C++
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <iostream> | |
#include <vector> | |
#include <type_traits> | |
template<template<typename...> class Container, typename T, typename... Ts> | |
class ContainerTuple | |
{ | |
public: | |
template<typename TT> | |
typename std::enable_if<std::is_same<T, TT>::value, Container<T>&>::type get() | |
{ | |
return container; | |
} | |
template<typename TT> | |
typename std::enable_if<std::__not_<std::is_same<T, TT>>::value, Container<TT>&>::type get() | |
{ | |
return rest.get<TT>(); | |
} | |
private: | |
Container<T> container; | |
ContainerTuple<Container, Ts...> rest; | |
}; | |
template<template<typename...> class Container, typename T> | |
class ContainerTuple<Container, T> | |
{ | |
public: | |
template<typename TT> | |
typename std::enable_if<std::is_same<T, TT>::value, Container<T>&>::type get() | |
{ | |
return container; | |
} | |
private: | |
Container<T> container; | |
}; | |
int main() | |
{ | |
ContainerTuple<std::vector, int, bool, char> ct; | |
ct.get<int>().push_back(10); | |
ct.get<char>().push_back('y'); | |
ct.get<char>().push_back('a'); | |
ct.get<char>().push_back('y'); | |
ct.get<char>().push_back('!'); | |
ct.get<bool>().push_back(true); | |
std::cout << "expected: 10" << std::endl; | |
for(int const& i : ct.get<int>()) | |
{ | |
std::cout << i; | |
} | |
std::cout << std::endl; | |
std::cout << "expected: yay!" << std::endl; | |
for(char const& c : ct.get<char>()) | |
{ | |
std::cout << c; | |
} | |
std::cout << std::endl; | |
std::cout << "expected: true" << std::endl; | |
for(bool const& b : ct.get<bool>()) | |
{ | |
std::cout << b; | |
} | |
std::cout << std::endl; | |
return 0; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment