Lua tutorial part 3. paste 1.

extern "C" {
# include "lua.h"
# include "lauxlib.h"
# include "lualib.h"
}

#include <iostream>
#include <string>
#include "luawrapper.hpp"

class Character {
public:
    Character(const char* name, int hp);
    void say(const char* text);
    void heal(Character* character);
        const char* getName() { return name;}
    int getHealth() { return health; }
    void setHealth(int hp) { health = hp; }
private:
    const char* name;
    int health;
};

Character::Character(const char* name, int hp) {
    this->name = name;
    health = hp;
}

void Character::say(const char* text) {
    std::cout<<name<<":"<<text<<std::endl;
}

void Character::heal(Character* character) {
    character->setHealth(100);
}

Character* Character_new(lua_State* L) {
    const char* name = luaL_checkstring(L, 1);
    int hp = luaL_checknumber(L, 2);
    return new Character(name, hp);
}

int Character_getName(lua_State* L) {
    Character* character = luaW_check<Character>(L, 1);
    lua_pushstring(L, character->getName());
    return 1;
}


int Character_getHealth(lua_State* L) {
    Character* character = luaW_check<Character>(L, 1);
    lua_pushnumber(L, character->getHealth());
    return 1;
}

int Character_setHealth(lua_State* L) {
    Character* character = luaW_check<Character>(L, 1);
    int hp = luaL_checknumber(L, 2);
    character->setHealth(hp);
    return 0;
}


static luaL_Reg Character_table[] = {
    { NULL, NULL }
};

static luaL_Reg Character_metatable[] = {
    { "getName", Character_getName },
    { "getHealth", Character_getHealth },
    { "setHealth", Character_setHealth },
    { NULL, NULL }
};

static int luaopen_Character(lua_State* L) {
    luaW_register<Character>(L, "Character", Character_table, Character_metatable, Character_new);
    return 1;
}

int main() {
    lua_State* L = luaL_newstate();
    luaL_openlibs(L);
    luaopen_Character(L);
    if (luaL_loadfile(L, "test.lua")) {
        std::cout<<"Error, can't open script"<<std::endl;
    }

    lua_pcall(L, 0, 0, 0);
}