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https://github.com/ThePhD/sol2.git
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110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
#define SOL_ALL_SAFETIES_ON 1
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#define SOL_ENABLE_INTEROP 1 // MUST be defined to use interop features
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#include <sol/sol.hpp>
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#include <luwra.hpp>
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#include <iostream>
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#include <assert.hpp>
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// luwra,
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// another C++ wrapper library:
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// https://github.com/vapourismo/luwra
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struct ABC {
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ABC()
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: v_(0) {
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}
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ABC(int value)
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: v_(value) {
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}
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int value() const {
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return v_;
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}
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void setValue(int v) {
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v_ = v;
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}
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void overload1() {
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std::cout << "call overload1" << std::endl;
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}
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void overload2(int) {
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std::cout << "call overload2" << std::endl;
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}
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private:
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int v_;
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};
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template <typename T, typename Handler>
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inline bool sol_lua_interop_check(sol::types<T>, lua_State* L, int relindex, sol::type index_type, Handler&& handler, sol::stack::record& tracking) {
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// just marking unused parameters for no compiler warnings
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(void)index_type;
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(void)handler;
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// using 1 element
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tracking.use(1);
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int index = lua_absindex(L, relindex);
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if (lua_getmetatable(L, index) == 1) {
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luaL_getmetatable(L, luwra::internal::UserTypeReg<T>::name.c_str());
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bool is_correct_type = lua_rawequal(L, -2, -1) == 1;
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lua_pop(L, 2);
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return is_correct_type;
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}
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return false;
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}
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template <typename T>
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inline std::pair<bool, T*> sol_lua_interop_get(sol::types<T> t, lua_State* L, int relindex, void* unadjusted_pointer, sol::stack::record& tracking) {
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// you may not need to specialize this method every time:
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// some libraries are compatible with sol3's layout
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int index = lua_absindex(L, relindex);
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if (!sol_lua_interop_check(t, L, index, sol::type::userdata, sol::no_panic, tracking)) {
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return { false, nullptr };
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}
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return { true, static_cast<T*>(unadjusted_pointer) };
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}
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void register_sol_stuff(lua_State* L) {
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// grab raw state and put into state_view
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// state_view is cheap to construct
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sol::state_view lua(L);
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// bind and set up your things: everything is entirely self-contained
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lua["f"] = sol::overload(
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[](ABC& from_luwra) {
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std::cout << "calling 1-argument version with luwra-created ABC { " << from_luwra.value() << " }" << std::endl;
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c_assert(from_luwra.value() == 24);
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},
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[](ABC& from_luwra, int second_arg) {
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std::cout << "calling 2-argument version with luwra-created ABC { " << from_luwra.value() << " } and integer argument of " << second_arg << std::endl;
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c_assert(from_luwra.value() == 24);
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c_assert(second_arg == 5);
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});
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}
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void check_with_sol(lua_State* L) {
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sol::state_view lua(L);
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ABC& obj = lua["obj"];
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(void)obj;
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c_assert(obj.value() == 24);
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}
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int main(int, char* []) {
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std::cout << "=== interop example (luwra) ===" << std::endl;
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std::cout << "code modified from luwra's documentation examples: https://github.com/vapourismo/luwra" << std::endl;
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luwra::StateWrapper state;
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state.registerUserType<ABC(int)>("ABC", { LUWRA_MEMBER(ABC, value), LUWRA_MEMBER(ABC, setValue) }, {});
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register_sol_stuff(state);
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state.runString(R"(
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obj = ABC(24)
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f(obj) -- call 1 argument version
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f(obj, 5) -- call 2 argument version
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)");
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check_with_sol(state);
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return 0;
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} |