isnan must be preceeded by std::

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/trunk@1486 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: 94adb015da0957f3b4ce3f5742f9cb0cf57b6284

1 files changed, 3 insertions, 3 deletions

diff --git a/src/Alpha_complex/include/gudhi/Alpha_complex.h b/src/Alpha_complex/include/gudhi/Alpha_complex.h
index 096d2d2e..2c95ceb4 100644
--- a/src/Alpha_complex/include/gudhi/Alpha_complex.h
+++ b/src/Alpha_complex/include/gudhi/Alpha_complex.h
@@ -309,7 +309,7 @@ class Alpha_complex : public Simplex_tree<> {
           std::cout << std::endl;
 #endif  // DEBUG_TRACES
           // ### If filt(Sigma) is NaN : filt(Sigma) = alpha(Sigma)
-          if (isnan(filtration(f_simplex))) {
+          if (std::isnan(filtration(f_simplex))) {
             Filtration_value alpha_complex_filtration = 0.0;
             // No need to compute squared_radius on a single point - alpha is 0.0
             if (f_simplex_dim > 0) {
@@ -352,10 +352,10 @@ class Alpha_complex : public Simplex_tree<> {
         std::cout << vertex << " ";
       }
       std::cout << "is a face of Sigma\n";
-      std::cout << " | isnan(filtration(Tau)=" << isnan(filtration(f_boundary)) << std::endl;
+      std::cout << " | isnan(filtration(Tau)=" << std::isnan(filtration(f_boundary)) << std::endl;
 #endif  // DEBUG_TRACES
       // ### If filt(Tau) is not NaN
-      if (!isnan(filtration(f_boundary))) {
+      if (!std::isnan(filtration(f_boundary))) {
         // ### filt(Tau) = fmin(filt(Tau), filt(Sigma))
         Filtration_value alpha_complex_filtration = fmin(filtration(f_boundary), filtration(f_simplex));
         assign_filtration(f_boundary, alpha_complex_filtration);