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59 lines
3.4 KiB
ReStructuredText
59 lines
3.4 KiB
ReStructuredText
getting started
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===============
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Let's get you going with Sol! To start, you'll need to use a lua distribution of some sort. Sol doesn't provide that: it only wraps the API that comes with it, so you can pick whatever distribution you like for your application. There are lots, but the two popular ones are `vanilla Lua`_ and speedy `LuaJIT`_ . We recommend vanilla Lua if you're getting started, LuaJIT if you need speed and can handle some caveats: the interface for Sol doesn't change no matter what Lua version you're using.
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After that, make sure you grab either the `single header file release`_, or just perform a clone of the `github repository here`_ and set your include paths up so that you can get at ``sol.hpp`` somehow. We recommend the single-header-file release, since it's easier to move around, manage and update if you commit it with some form of version control. If you use the github release, you *must* update submodules in order to make sure Optional is present in the repository: clone with:
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>>> git clone https://github.com/ThePhD/sol2.git
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>>> git submodule update --init
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or, just run
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>>> git clone --recursive https://github.com/ThePhD/sol2.git
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When you're ready, try compiling this short snippet:
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.. code-block:: cpp
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:linenos:
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:caption: test.cpp: the first snippet
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:name: the-first-snippet
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#include <sol.hpp> // or #include "sol.hpp", whichever suits your needs
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int main (int argc, char* argv[]) {
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sol::state lua;
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lua.open_libraries( sol::lib::base );
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lua.script( "print('bark bark bark!')" );
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return 0;
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}
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Using this simple command line:
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>>> g++ -std=c++14 test.cpp -llua -I"path/to/lua/include" -L"path/to/lua/lib"
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Or using your favorite IDE / tool after setting up your include paths and library paths to lua according to the documentation of the Lua distribution you got. Remember your linked lua library (``-llua``) and include / library paths will depend on your OS, file system, Lua distribution and your installation / compilation method of your Lua distribution.
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.. note::
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If you get an avalanche of errors (particularly referring to ``auto``), you may not have enabled C++14 / C++17 mode for your compiler. Add one of ``std=c++14``, ``std=c++1z`` OR ``std=c++1y`` to your compiler options. By default, this is always-on for VC++ compilers in Visual Studio and friends, but g++ and clang++ require a flag (unless you're on `GCC 6.0`_).
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If this works, you're ready to start! The first line creates the ``lua_State`` and will hold onto it for the duration of the scope its declared in (e.g., from the opening ``{`` to the closing ``}``). It will automatically close / cleanup that lua state when it gets destructed. The second line opens a single lua-provided library, "base". There are several other libraries that come with lua that you can open by default, and those are included in the :ref:`sol::lib<lib-enum>` enumeration.
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If you're interested in integrating Sol with a project that already uses some other library or Lua in the codebase, check out the :doc:`existing example<existing>` to see how to work with Sol when you add it to a project!
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Next, let's start :doc:`reading/writing some variables<variables>` from Lua into C++, and vice-versa!
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.. _vanilla Lua: https://www.lua.org/
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.. _LuaJIT: http://luajit.org/
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.. _GCC 6.0: https://gcc.gnu.org/gcc-6/changes.html
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.. _single header file release: https://github.com/ThePhD/sol2/releases
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.. _github repository here: https://github.com/ThePhD/sol2 |