diff options
| author | clyne <clyne@bitgloo.com> | 2022-11-17 07:41:09 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-11-17 07:41:09 -0500 |
| commit | 6663c25633a27fcc14d0648bd1afea7ea12f497f (patch) | |
| tree | dcc2ec993db3c4b75c3e7e3df35b0494a9ce1f32 /lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp | |
| parent | da0913771538fd9b1ca538615fd9aa0388608466 (diff) | |
| parent | 57013add5b7c524086272be7d395f9ec5109bde2 (diff) | |
Lib cleanup
Diffstat (limited to 'lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp')
| -rw-r--r-- | lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp b/lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp deleted file mode 100644 index 8db4981..0000000 --- a/lib/sol2/examples/source/tutorials/quick_n_dirty/userdata.cpp +++ /dev/null @@ -1,100 +0,0 @@ -#define SOL_ALL_SAFETIES_ON 1 -#include <sol/sol.hpp> - -#include <assert.hpp> -#include <iostream> - -struct Doge { - int tailwag = 50; - - Doge() { - } - - Doge(int wags) - : tailwag(wags) { - } - - ~Doge() { - std::cout << "Dog at " << this << " is being destroyed..." << std::endl; - } -}; - -int main(int, char* []) { - std::cout << "=== userdata ===" << std::endl; - - sol::state lua; - - Doge dog{ 30 }; - - // fresh one put into Lua - lua["dog"] = Doge{}; - // Copy into lua: destroyed by Lua VM during garbage collection - lua["dog_copy"] = dog; - // OR: move semantics - will call move constructor if present instead - // Again, owned by Lua - lua["dog_move"] = std::move(dog); - lua["dog_unique_ptr"] = std::make_unique<Doge>(25); - lua["dog_shared_ptr"] = std::make_shared<Doge>(31); - - // Identical to above - Doge dog2{ 30 }; - lua.set("dog2", Doge{}); - lua.set("dog2_copy", dog2); - lua.set("dog2_move", std::move(dog2)); - lua.set("dog2_unique_ptr", std::unique_ptr<Doge>(new Doge(25))); - lua.set("dog2_shared_ptr", std::shared_ptr<Doge>(new Doge(31))); - - // Note all of them can be retrieved the same way: - Doge& lua_dog = lua["dog"]; - Doge& lua_dog_copy = lua["dog_copy"]; - Doge& lua_dog_move = lua["dog_move"]; - Doge& lua_dog_unique_ptr = lua["dog_unique_ptr"]; - Doge& lua_dog_shared_ptr = lua["dog_shared_ptr"]; - c_assert(lua_dog.tailwag == 50); - c_assert(lua_dog_copy.tailwag == 30); - c_assert(lua_dog_move.tailwag == 30); - c_assert(lua_dog_unique_ptr.tailwag == 25); - c_assert(lua_dog_shared_ptr.tailwag == 31); - - // lua will treat these types as opaque, and you will be able to pass them around - // to C++ functions and Lua functions alike - - // Use a C++ reference to handle memory directly - // otherwise take by value, without '&' - lua["f"] = [](Doge& dog) { - std::cout << "dog wags its tail " << dog.tailwag << " times!" << std::endl; - }; - - // if you bind a function using a pointer, - // you can handle when `nil` is passed - lua["handling_f"] = [](Doge* dog) { - if (dog == nullptr) { - std::cout << "dog was nil!" << std::endl; - return; - } - std::cout << "dog wags its tail " << dog->tailwag << " times!" << std::endl; - }; - - lua.script(R"( - f(dog) - f(dog_copy) - f(dog_move) - f(dog_unique_ptr) - f(dog_shared_ptr) - - -- C++ arguments that are pointers can handle nil - handling_f(dog) - handling_f(dog_copy) - handling_f(dog_move) - handling_f(dog_unique_ptr) - handling_f(dog_shared_ptr) - handling_f(nil) - - -- never do this - -- f(nil) - )"); - - std::cout << std::endl; - - return 0; -} |