Writing documentation for StaticFor.

src/TNL/Algorithms/StaticFor.h

@@ -15,10 +15,28 @@
 namespace TNL {
 namespace Algorithms {
 
-// Manual unrolling does not make sense for loops with a large iterations
-// count. For a very large iterations count it would trigger the compiler's
-// limit on recursive template instantiation. Also note that the compiler
-// will (at least partially) unroll loops with static bounds anyway.
+/***
+ * \brief StaticFor is a wrapper for common for-loop with explicit unrolling.
+ *
+ * StaticFor can be used only for for-loops bounds of which are known at the
+ * compile time. StaticFor performs explicit loop unrolling for better performance.
+ * This, however, does not make sense for loops with a large iterations
+ * count. For a very large iterations count it could trigger the compiler's
+ * limit on recursive template instantiation. Also note that the compiler
+ * will (at least partially) unroll loops with static bounds anyway. For theses
+ * reasons, the explicit loop unrolling can be controlled by the third template
+ * parameter.
+ *
+ * \tparam Begin the loop will iterate over indexes [Begin,End)
+ * \tparam End the loop will iterate over indexes [Begin,End)
+ * \tparam unrolled controls the explicit loop unrolling. If it is true, the
+ *   unrolling is performed.
+ *
+ * \par Example
+ * \include Algorithms/StaticForExample.cpp
+ * \par Output
+ * \include StaticForExample.out
+ */
 template< int Begin, int End, bool unrolled = (End - Begin <= 8) >
 struct StaticFor;
 
@@ -27,6 +45,12 @@ struct StaticFor< Begin, End, true >
 {
    static_assert( Begin < End, "Wrong index interval for StaticFor. Begin must be less than end." );
 
+   /**
+    * \brief Static method for execution od the StaticFor.
+    *
+    * @param f is a (lambda) function to be performed in each iteration.
+    * @param args are auxiliary data to be passed to the function f.
+    */
    template< typename Function, typename... Args >
    __cuda_callable__
    static void exec( const Function& f, Args&&... args )