Add new command to write out index lines (not yet implemented)

Author: kpeeters

core/algorithms/explicit_indices.cc

@@ -0,0 +1,29 @@
+
+#include "explicit_indices.hh"
+
+#include "properties/ImplicitIndex.hh"
+
+using namespace cadabra;
+
+explicit_indices::explicit_indices(const Kernel& k, Ex& tr)
+	: Algorithm(k, tr)
+	{
+	}
+
+bool explicit_indices::can_apply(iterator st)
+	{
+	// Work on equals nodes, or single terms (not terms in a sum) or 
+	// sums, provided the latter are not lhs or rhs of an equals node.
+	// All this because when we generate free indices, we need to
+	// ensure that all terms and all sides of an equals node use the
+	// same index names.
+	
+	return false;
+	}
+
+Algorithm::result_t explicit_indices::apply(iterator& prod)
+	{
+
+
+	return result_t::l_applied;
+	}

core/algorithms/explicit_indices.hh

@@ -0,0 +1,16 @@
+
+#pragma once
+
+#include "Algorithm.hh"
+
+namespace cadabra {
+
+class explicit_indices : public Algorithm {
+	public:
+		explicit_indices(const Kernel&, Ex&);
+
+		virtual bool     can_apply(iterator);
+		virtual result_t apply(iterator&);
+};
+
+}