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                <li class="toctree-l3"><a href="#general">General</a></li>
                
                    <li><a class="toctree-l4" href="#wrap-cc-functions">Wrap C/C++ functions</a></li>
                
            
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                <h1 id="general">General</h1>
<p>Luwra provides an easy way to turn any C or C++ function into a
<a href="http://www.lua.org/manual/5.3/manual.html#lua_CFunction">lua_CFunction</a> which can be used by the
Lua VM. Note, all parameter types must be readable from the stack (<code>Value&lt;T&gt;::read</code> exists for all)
and the return type must be pushable (<code>Value&lt;T&gt;::push</code> exists).</p>
<h2 id="wrap-cc-functions">Wrap C/C++ functions</h2>
<p>Assuming you have a function similiar to this:</p>
<pre><code class="c++">int my_function(const char* a, int b) {
    return /* magic */;
}
</code></pre>

<p>You can easily wrap it using the <code>LUWRA_WRAP</code> macro:</p>
<pre><code class="c++">// Convert to lua_CFunction
lua_CFunction cfun = LUWRA_WRAP(my_function);

// Do something with it, for example set it as a Lua global function
luwra::setGlobal(lua, &quot;my_function&quot;, cfun);
</code></pre>

<p><strong>Note:</strong> Do not provide the address of your function (e.g. <code>&amp;my_function</code>) to any wrapping macro.
The macros will take care of this themselves. You must provide only the name of the function.</p>
<p>Calling the function from Lua is fairly straightforward:</p>
<pre><code class="lua">local my_result = my_function(&quot;Hello World&quot;, 1337)
print(my_result)
</code></pre>
              
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