Nasal-Interpreter/ast/nasal_new_err.h

#pragma once

#include <iostream>
#include <fstream>
#include <sstream> // MSVC need this to use std::getline
#include <cstring>
#include <vector>

#include "nasal_new_header.h"

struct span {
    u32 begin_line;
    u32 begin_column;
    u32 end_line;
    u32 end_column;
    std::string file;
};

#ifdef _WIN32
#include <windows.h> // use SetConsoleTextAttribute
struct for_reset {
    CONSOLE_SCREEN_BUFFER_INFO scr;
    for_reset() {
        GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &scr);
    }
} reset_ter_color;
#endif

std::ostream& back_white(std::ostream&);
std::ostream& red(std::ostream&);
std::ostream& cyan(std::ostream&);
std::ostream& orange(std::ostream&);
std::ostream& white(std::ostream&);
std::ostream& reset(std::ostream&);

class flstream {
protected:
    std::string file;
    std::vector<std::string> res;
public:
    flstream():file("") {}
    void load(const std::string&);
    const std::string& operator[](usize n) const {return res[n];}
    const std::string& name() const {return file;}
    usize size() const {return res.size();}
};

class error:public flstream {
private:
    u32 cnt; // counter for errors

    std::string identation(usize len) {
        return std::string(len,' ');
    }
    std::string leftpad(u32 num, usize len) {
        auto tmp = std::to_string(num);
        while(tmp.length()<len) {
            tmp=" "+tmp;
        }
        return tmp;
    }
public:
    error():cnt(0) {}
    void fatal(const std::string&, const std::string&);
    void err(const std::string&, const std::string&);
    void err(const std::string&, const span&, const std::string&);

    void chkerr() const {
        if (cnt) {
            std::exit(1);
        }
    }
};