title: What is the meaning of _Space in C?
body: <p>I have seen this expression in the code of other developer and I cannot get the meaning of it, the code line is: </p>
  
  <pre><code>typedef struct _Space Space;
  </code></pre>
  
  <p>So, for the syntax I reckon that <code>_Space</code>  is a kind of variable or something similar but I do not know what kind of variable it is (integer, string, Boolean, etc).</p>
  
  <p>Anyone have any idea??</p>