54 lines
1.1 KiB
C++
54 lines
1.1 KiB
C++
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#define SOL_ALL_SAFETIES_ON 1
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#include <sol/sol.hpp>
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// NOTE:
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// There are TWO ways to retrieve the "this"
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// object from calls, when it comes to constructors and regular
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// member functions please pay attention to both: this is a
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// low-level operation!
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int main() {
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struct thing {
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thing(sol::this_state ts) {
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lua_State* L = ts;
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// references the object that called this function
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// in constructors:
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sol::stack_object selfobj(L, 1);
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// definitely the same
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thing& self = selfobj.as<thing>();
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SOL_ASSERT(&self == this);
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}
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void func(sol::this_state ts) const {
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lua_State* L = ts;
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// references the object that called this function
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// in regular member functions:
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sol::stack_object selfobj(L, 1);
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// "1" is the bottom of the Lua stack
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// 2 is one up, so on and so forth...
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thing& self = selfobj.as<thing>();
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// definitely the same
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SOL_ASSERT(&self == this);
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}
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};
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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lua.new_usertype<thing>("thing",
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sol::constructors<thing(sol::this_state)>(),
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"func",
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&thing::func);
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lua.script(R"(
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obj = thing.new()
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obj:func()
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)");
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return 0;
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}
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