From 2e7b5921da4a4c263169d547d2370358a0fcf414 Mon Sep 17 00:00:00 2001
From: Andreas Dedner <dedner@dune-project.org>
Date: Fri, 2 Oct 2009 19:21:19 +0000
Subject: [PATCH] moved from grid/genericgeometry
[[Imported from SVN: r5612]]
---
common/forloop.hh | 135 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100644 common/forloop.hh
diff --git a/common/forloop.hh b/common/forloop.hh
new file mode 100644
index 000000000..bf7cc0253
--- /dev/null
+++ b/common/forloop.hh
@@ -0,0 +1,135 @@
+// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+// vi: set et ts=4 sw=2 sts=2:
+#ifndef DUNE_COMMON_FORLOOP_HH
+#define DUNE_COMMON_FORLOOP_HH
+
+#include <dune/common/static_assert.hh>
+
+namespace Dune
+{
+ /** \class ForLoop
+ * @brief A static loop using TMP
+ *
+ * The ForLoop takes a
+ * \code template<int i> class Operation
+ * template argument with a static apply method
+ * which is called for i=first...last (first<=last are int template arguments).
+ * A specialization for class template class Operation for i=first
+ * or i=last is not required. The class Operation must provide a
+ * static void function apply(...). Arguments (as references)
+ * can be passed through the ForLoop to this function
+ * (up to 5 at the moment).
+ *
+ * It is possible to pass a subclass to the ForLoop
+ * (since no specialization is needed).
+ * Example of usage:
+ * template <class Foo>
+ * struct A
+ * {
+ * template <int i>
+ * struct Operation
+ * {
+ * template <class T>
+ * static void apply(const double &x,const T &t, T &ret)
+ * {
+ * ret = "hallo" + t;
+ * }
+ * };
+ * void useForLoop()
+ * {
+ * std::string world;
+ * ForLoop<Operation,1,10>::apply(1.,"hallo",world);
+ * }
+ * };
+ */
+
+ template< template< int > class Operation, int first, int last >
+ struct ForLoop
+ {
+ static void apply ()
+ {
+ Operation< first >::apply();
+ ForLoop< Operation, first+1, last >::apply();
+ }
+
+ template< class T1 >
+ static void apply ( T1 &p1 )
+ {
+ Operation< first >::apply( p1 );
+ ForLoop< Operation, first+1, last >::apply( p1 );
+ }
+
+ template< class T1, class T2 >
+ static void apply ( T1 &p1, T2 &p2 )
+ {
+ Operation< first >::apply( p1, p2 );
+ ForLoop< Operation, first+1, last >::apply( p1, p2 );
+ }
+
+ template< class T1, class T2, class T3 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3 )
+ {
+ Operation< first >::apply( p1, p2, p3 );
+ ForLoop< Operation, first+1, last >::apply( p1, p2, p3 );
+ }
+
+ template< class T1, class T2, class T3, class T4 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3, T4 &p4 )
+ {
+ Operation< first >::apply( p1, p2, p3, p4 );
+ ForLoop< Operation, first+1, last >::apply( p1, p2, p3, p4 );
+ }
+
+ template< class T1, class T2, class T3, class T4, class T5 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3, T4 &p4, T5 &p5 )
+ {
+ Operation< first >::apply( p1, p2, p3, p4, p5 );
+ ForLoop< Operation, first+1, last >::apply( p1, p2, p3, p4, p5 );
+ }
+
+ private:
+ dune_static_assert( (first <= last), "ForLoop: first > last" );
+ };
+
+ template< template< int > class Operation, int last >
+ struct ForLoop< Operation, last, last >
+ {
+ static void apply ()
+ {
+ Operation< last >::apply();
+ }
+
+ template< class T1 >
+ static void apply ( T1 &p1 )
+ {
+ Operation< last >::apply( p1 );
+ }
+
+ template< class T1, class T2 >
+ static void apply ( T1 &p1, T2 &p2 )
+ {
+ Operation< last >::apply( p1, p2 );
+ }
+
+ template< class T1, class T2, class T3 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3 )
+ {
+ Operation< last >::apply( p1, p2, p3 );
+ }
+
+ template< class T1, class T2, class T3, class T4 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3, T4 &p4 )
+ {
+ Operation< last >::apply( p1, p2, p3, p4 );
+ }
+
+ template< class T1, class T2, class T3, class T4, class T5 >
+ static void apply ( T1 &p1, T2 &p2, T3 &p3, T4 &p4, T5 &p5 )
+ {
+ Operation< last >::apply( p1, p2, p3, p4, p5 );
+ }
+ };
+
+}
+
+#endif
--
GitLab