eagine/tribool.cpp

Copyright Matus Chochlik. Distributed under the Boost Software License, Version 1.0. See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt

#include <eagine/preprocessor.hpp>
#include <eagine/tribool.hpp>
#include <iostream>
 
void print(const char* expr, eagine::weakbool v) {
    std::cout << "'" << expr << "': ";
    if(!v) {
        std::cout << "no" << std::endl;
    } else if(v) {
        std::cout << "yes" << std::endl;
    } else {
        std::cout << "maybe" << std::endl;
    }
}
 
void print(const char* expr, eagine::tribool v) {
    std::cout << "'" << expr << "': ";
    if(v) {
        std::cout << "yes" << std::endl;
    } else if(!v) {
        std::cout << "no" << std::endl;
    } else {
        std::cout << "maybe" << std::endl;
    }
}
 
#define EAG_PRINT(EXPR) print(EAGINE_STRINGIFY(EXPR), EXPR)
 
auto main() -> int {
    using namespace eagine;
 
    tribool yes{true};
    tribool no{false};
    tribool maybe{indeterminate};
 
    EAG_PRINT(yes);
    EAG_PRINT(no);
    EAG_PRINT(maybe);
 
    EAG_PRINT(~yes);
    EAG_PRINT(~no);
    EAG_PRINT(~maybe);
 
    EAG_PRINT(yes && yes);
    EAG_PRINT(yes && no);
    EAG_PRINT(yes && maybe);
    EAG_PRINT(no && yes);
    EAG_PRINT(no && no);
    EAG_PRINT(no && maybe);
    EAG_PRINT(maybe && maybe);
 
    EAG_PRINT(yes || yes);
    EAG_PRINT(yes || no);
    EAG_PRINT(yes || maybe);
    EAG_PRINT(no || yes);
    EAG_PRINT(no || no);
    EAG_PRINT(no || maybe);
    EAG_PRINT(maybe || maybe);
 
    return 0;
}