now using const passing of object reference instead of pointers

1 files changed, 4 insertions, 4 deletions

diff --git a/lib/correlation.h b/lib/correlation.h
index 49c6ff2..23b1bd9 100644
--- a/lib/correlation.h
+++ b/lib/correlation.h
@@ -7,13 +7,13 @@
 #include <fftw3.h>
 
 template <class R_t, class X_t>
-double correlation_length(const state_t <R_t, X_t> *s) {
+double correlation_length(const state_t <R_t, X_t>& s) {
   double total = 0;
 
-  for (D_t j = 0; j < s->D; j++) {
-    total += norm_squared(s->ReF[j]) + norm_squared(s->ReF[j]);
+  for (D_t j = 0; j < s.D; j++) {
+    total += norm_squared(s.ReF[j]) + norm_squared(s.ReF[j]);
   }
 
-  return total / s->D;
+  return total / s.D;
 }