position.cpp

#include "position.hpp"

#include <stdexcept>

Position voisine(const Position& pos, int direction) {
    Position res = pos ;

    switch(direction) {
        case 0: // haut
            res.first-- ;
            break ;
        case 1: // gauche
            res.second++ ;
            break ;
        case 2: // bas
            res.first++ ;
            break ;
        case 3: // droite
            res.second-- ;
            break ;
        default:
            throw std::invalid_argument("Direction invalide") ;
    }

    return res ;
}

std::ostream& operator<<(std::ostream& out, const Position& pos) {
    out << "{" << pos.first << "," << pos.second << "}" ;
    return out ;
}