mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
25 lines
1.8 KiB
ReStructuredText
25 lines
1.8 KiB
ReStructuredText
integrating into existing code
|
|
==============================
|
|
|
|
If you're already using lua and you just want to use ``sol`` in some places, you can use ``state_view``:
|
|
|
|
.. code-block:: cpp
|
|
:linenos:
|
|
:caption: using state_view
|
|
:name: state-view-snippet
|
|
|
|
void something_in_my_system (lua_State* L) {
|
|
// start using Sol with a pre-existing system
|
|
sol::state_view lua(L); // non-owning
|
|
|
|
lua.script("print('bark bark bark!')");
|
|
|
|
sol::table expected_table(L); // get the table off the top of the stack
|
|
// start using it...
|
|
}
|
|
|
|
:doc:`sol::state_view<../api/state>` is exactly like ``sol::state``, but it doesn't manage the lifetime of a ``lua_State*``. Therefore, you get all the goodies that come with a ``sol::state`` without any of the ownership implications. Sol has no initialization components that need to deliberately remain alive for the duration of the program. It's entirely self-containing and uses lua's garbage collectors and various implementation techniques to require no state C++-side. After you do that, all of the power of `Sol` is available to you, and then some!
|
|
|
|
Remember that Sol can be as lightweight as you want it: almost all of Sol's types take the ``lua_State*`` argument and then a second ``int index`` stack index argument, meaning you can use :doc:`tables<../api/table>`, :doc:`lua functions<../api/function>`, :doc:`coroutines<../api/coroutine>`, and other reference-derived objects that expose the proper constructor for your use. You can also set :doc:`usertypes<../api/usertype>` and other things you need without changing your entire architecture.
|
|
|
|
Note that you can also make non-standard pointer and reference types with custom reference counting and such also play nice with the system. See :doc:`unique_usertype_traits\<T><../api/unique_usertype_traits>` to see how! |