add #include "ElementType.h"

FunctionSpace/LineLagrangeBasis.cpp

 #include "Exception.h"
 #include "LineLagrangeBasis.h"
 #include "pointsGenerators.h"
+#include "ElementType.h"
 
 LineLagrangeBasis::LineLagrangeBasis(unsigned int order){
   // If order 0 (Nedelec): use order 1

FunctionSpace/QuadLagrangeBasis.cpp

 #include "Exception.h"
 #include "QuadLagrangeBasis.h"
 #include "pointsGenerators.h"
+#include "ElementType.h"
 
 QuadLagrangeBasis::QuadLagrangeBasis(unsigned int order){
   // If order 0 (Nedelec): use order 1

FunctionSpace/TetLagrangeBasis.cpp

 #include "Exception.h"
 #include "TetLagrangeBasis.h"
 #include "pointsGenerators.h"
+#include "ElementType.h"
 
 TetLagrangeBasis::TetLagrangeBasis(unsigned int order){
   // If order 0 (Nedelec): use order 1

FunctionSpace/TriLagrangeBasis.cpp

@@ -2,6 +2,7 @@
 #include "TriLagrangeBasis.h"
 #include "pointsGenerators.h"
 #include "TriLagrangeReferenceSpace.h"
+#include "ElementType.h"
 
 #include <iostream>