121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
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#define SOL_ALL_SAFETIES_ON 1
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#include <sol/sol.hpp>
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#include <iostream>
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struct my_type {
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int value = 10;
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my_type() {
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being default constructed!"
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<< std::endl;
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}
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my_type(const my_type& other) : value(other.value) {
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being copy constructed!" << std::endl;
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}
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my_type(my_type&& other) : value(other.value) {
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being move-constructed!" << std::endl;
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}
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my_type& operator=(const my_type& other) {
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value = other.value;
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being copy-assigned to!" << std::endl;
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return *this;
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}
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my_type& operator=(my_type&& other) {
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value = other.value;
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being move-assigned to!" << std::endl;
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return *this;
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}
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~my_type() {
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std::cout << "my_type at " << static_cast<void*>(this)
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<< " being destructed!" << std::endl;
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}
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};
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int main() {
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std::cout << "=== shared_ptr support ===" << std::endl;
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sol::state lua;
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lua.new_usertype<my_type>(
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"my_type", "value", &my_type::value);
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{
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std::shared_ptr<my_type> shared
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= std::make_shared<my_type>();
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lua["shared"] = std::move(shared);
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}
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{
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std::cout << "getting reference to shared_ptr..."
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<< std::endl;
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std::shared_ptr<my_type>& ref_to_shared_ptr
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= lua["shared"];
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std::cout << "\tshared.use_count(): "
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<< ref_to_shared_ptr.use_count()
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<< std::endl;
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my_type& ref_to_my_type = lua["shared"];
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std::cout << "\tafter getting reference to my_type: "
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<< ref_to_shared_ptr.use_count()
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<< std::endl;
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my_type* ptr_to_my_type = lua["shared"];
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std::cout << "\tafter getting pointer to my_type: "
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<< ref_to_shared_ptr.use_count()
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<< std::endl;
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SOL_ASSERT(
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ptr_to_my_type == ref_to_shared_ptr.get());
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SOL_ASSERT(
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&ref_to_my_type == ref_to_shared_ptr.get());
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SOL_ASSERT(ref_to_shared_ptr->value == 10);
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// script affects all of them equally
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lua.script("shared.value = 20");
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SOL_ASSERT(ptr_to_my_type->value == 20);
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SOL_ASSERT(ref_to_my_type.value == 20);
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SOL_ASSERT(ref_to_shared_ptr->value == 20);
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}
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{
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std::cout << "getting copy of shared_ptr..."
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<< std::endl;
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std::shared_ptr<my_type> copy_of_shared_ptr
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= lua["shared"];
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std::cout << "\tshared.use_count(): "
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<< copy_of_shared_ptr.use_count()
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<< std::endl;
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my_type copy_of_value = lua["shared"];
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std::cout << "\tafter getting value copy of my_type: "
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<< copy_of_shared_ptr.use_count()
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<< std::endl;
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SOL_ASSERT(copy_of_shared_ptr->value == 20);
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SOL_ASSERT(copy_of_value.value == 20);
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// script still affects pointer, but does not affect
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// copy of `my_type`
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lua.script("shared.value = 30");
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SOL_ASSERT(copy_of_shared_ptr->value == 30);
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SOL_ASSERT(copy_of_value.value == 20);
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}
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// set to nil and collect garbage to destroy it
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lua.script("shared = nil");
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lua.collect_garbage();
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lua.collect_garbage();
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std::cout << "garbage has been collected" << std::endl;
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std::cout << std::endl;
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return 0;
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}
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