Replace NULL by nullptr

src/OpenMesh/Core/IO/IOManager.cc

@@ -258,7 +258,7 @@ find_writer(const std::string& _format)
     if ((*it)->can_u_write(filename))
       return *it;
 
-  return NULL;
+  return nullptr;
 }
 
 

src/OpenMesh/Core/IO/OMFormat.cc

@@ -135,7 +135,7 @@ namespace OMFormat {
       default:
 	std::clog << "as_string(Chunk::Entity): Invalid value!";
     }
-    return NULL;
+    return nullptr;
   }
 
 
@@ -153,7 +153,7 @@ namespace OMFormat {
       case Chunk::Type_Custom:   return "Custom";
       case Chunk::Type_Topology: return "Topology";
     }
-    return NULL;
+    return nullptr;
   }
 
 
@@ -172,7 +172,7 @@ namespace OMFormat {
       case Chunk::Dim_7D: return "7D";
       case Chunk::Dim_8D: return "8D";
     }
-    return NULL;
+    return nullptr;
   }
 
 
@@ -187,7 +187,7 @@ namespace OMFormat {
       case Chunk::Integer_32 : return "32";
       case Chunk::Integer_64 : return "64";
     }
-    return NULL;
+    return nullptr;
   }
 
   const char *as_string(Chunk::Float_Size d)
@@ -198,7 +198,7 @@ namespace OMFormat {
       case Chunk::Float_64 : return "64";
       case Chunk::Float_128: return "128";
     }
-    return NULL;
+    return nullptr;
   }
 
 

src/OpenMesh/Core/IO/exporter/BaseExporter.hh

@@ -144,7 +144,7 @@ public:
   virtual OpenMesh::Attributes::StatusInfo  status(HalfedgeHandle _heh) const = 0;
 
   // get reference to base kernel
-  virtual const BaseKernel* kernel() { return 0; }
+  virtual const BaseKernel* kernel() { return nullptr; }
 
 
   // query number of faces, vertices, normals, texcoords

src/OpenMesh/Core/IO/importer/BaseImporter.hh

@@ -196,7 +196,7 @@ public:
   virtual void add_texture_information( int _id , std::string _name ) = 0;
 
   // get reference to base kernel
-  virtual BaseKernel* kernel() { return 0; }
+  virtual BaseKernel* kernel() { return nullptr; }
 
   virtual bool is_triangle_mesh()     const { return false; }