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#define SOL_ALL_SAFETIES_ON 1
#include <sol/sol.hpp>
#include <iostream>
struct object {
void my_func() {
std::cout << "hello\n";
}
};
int deny(lua_State* L) {
return luaL_error(L, "HAH! Deniiiiied!");
}
int main(int, char*[]) {
sol::state lua;
lua.open_libraries(sol::lib::base);
object my_obj;
sol::table obj_table = lua.create_named_table("object");
sol::table obj_metatable = lua.create_table_with();
obj_metatable.set_function(
"my_func", &object::my_func, &my_obj);
// Set whatever else you need to
// on the obj_metatable,
// not on the obj_table itself!
// Properly self-index metatable to block things
obj_metatable[sol::meta_function::new_index] = deny;
obj_metatable[sol::meta_function::index] = obj_metatable;
// Set it on the actual table
obj_table[sol::metatable_key] = obj_metatable;
try {
lua.script(R"(
print(object.my_func)
object["my_func"] = 24
print(object.my_func)
)");
}
catch (const std::exception& e) {
std::cout << "an expected error occurred: " << e.what()
<< std::endl;
}
return 0;
}
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