X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Ftensor.cpp;h=0a57ae56b7916a12722808eeb4f08b1f2e9c306a;hp=259af3e45d3a579639f1712e7b5100bf9123d9e7;hb=052e9928511dd77d1d5d489b2a61b75579cc44e3;hpb=d327f3f00c66a79d42855939866047b3e8caa630

diff --git a/ginac/tensor.cpp b/ginac/tensor.cpp
index 259af3e4..0a57ae56 100644
--- a/ginac/tensor.cpp
+++ b/ginac/tensor.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's special tensors. */
 
 /*
- *  GiNaC Copyright (C) 1999-2008 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2015 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -20,10 +20,6 @@
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#include <iostream>
-#include <stdexcept>
-#include <vector>
-
 #include "tensor.h"
 #include "idx.h"
 #include "indexed.h"
@@ -36,6 +32,10 @@
 #include "archive.h"
 #include "utils.h"
 
+#include <iostream>
+#include <stdexcept>
+#include <vector>
+
 namespace GiNaC {
 
 GINAC_IMPLEMENT_REGISTERED_CLASS(tensor, basic)
@@ -364,13 +364,17 @@ ex tensepsilon::eval_indexed(const basic & i) const
 		if (minkowski) {
 			for (size_t j=1; j<i.nops(); j++) {
 				const ex & x = i.op(j);
-				if (!is_a<varidx>(x))
+				if (!is_a<varidx>(x)) {
 					throw(std::runtime_error("indices of epsilon tensor in Minkowski space must be of type varidx"));
-				if (ex_to<varidx>(x).is_covariant())
-					if (ex_to<idx>(x).get_value().is_zero())
+				}
+				if (ex_to<varidx>(x).is_covariant()) {
+					if (ex_to<idx>(x).get_value().is_zero()) {
 						sign = (pos_sig ? -sign : sign);
-					else
+					}
+					else {
 						sign = (pos_sig ? sign : -sign);
+					}
+				}
 			}
 		}