#pragma once

#include <string>
#include <optional>
#include <fstream>
#include <stdexcept>

namespace fsh::util {


extern const char* tokens[];

template <class T>
static inline std::optional<std::string> mk_optional(T t){
    if(t){
        return t->gvalue();
    }
    return std::optional<std::string>();
}

static inline bool contains(char x, std::string text) {
    for (const auto& chr : text){
        if(chr == x) return 1;
    }
    return 0;
};


static inline std::ifstream input(const std::string& x) {
    std::ifstream in(x, std::ios::in);
    if(!in) {
        throw std::runtime_error("Can't open file");
    }
    return in;
}


static inline std::ofstream output(const std::string& x) {
    std::ofstream out(x, std::ios::out);
    if(!out.is_open()) {
        throw std::runtime_error("Can't open file");
    }
    return out;
}


static inline std::ofstream output_append(const std::string& x) {
    std::ofstream out(x, std::ios::app | std::ios::out);
    if(!out.is_open()) {
        throw std::runtime_error("Can't open file");
    }
    return out;
}

}