manage static properly

NonLinearSolver/materialLaw/STensorOperations.cpp

@@ -241,7 +241,7 @@ bool STensorOperation::logSTensor3(const STensor3& a, const int order, STensor3&
 }
 
 
-void STensorOperation::expSTensor3(const STensor3& a, const int order, STensor3& expa, STensor43* dexpa, STensor63* ddexpa)
+bool STensorOperation::expSTensor3(const STensor3& a, const int order, STensor3& expa, STensor43* dexpa, STensor63* ddexpa)
 {
   // Tools
   static const STensor3 I(1.);
@@ -279,6 +279,7 @@ void STensorOperation::expSTensor3(const STensor3& a, const int order, STensor3&
       Msg::Error("error in computing expSTensor3");
       #endif // _DEBUG
     }
+    return ok;
   }
   else if (order == -1)
   {
@@ -358,7 +359,9 @@ void STensorOperation::expSTensor3(const STensor3& a, const int order, STensor3&
   else
   {
     Msg::Error("order = %d is not implemented",order);
+    return false;
   }
+  return true;
 }
 
 void STensorOperation::getEigenDecomposition(const STensor3& a, double& x1, double& x2, double& x3, STensor3& E1, STensor3& E2, STensor3& E3, 

NonLinearSolver/materialLaw/STensorOperations.h

@@ -2152,7 +2152,7 @@ namespace STensorOperation{
   // F = sum_{i=0, order) coeffs[i]*a^i
   bool polynomial(const STensor3& a, const int order, const fullVector<double>& coeffs, STensor3& F, STensor43* dF= NULL, STensor63* ddF=NULL);
   bool logSTensor3(const STensor3& a, const int order, STensor3& loga, STensor43* dloga = NULL, STensor63* ddloga = NULL);
-  void expSTensor3(const STensor3& a, const int order, STensor3& expa, STensor43* dexpa = NULL, STensor63* ddexpa = NULL);
+  bool expSTensor3(const STensor3& a, const int order, STensor3& expa, STensor43* dexpa = NULL, STensor63* ddexpa = NULL);
   
   void VRDecomposition(const STensor3& a, STensor3& V, STensor3&R);
   void RUDecomposition(const STensor3& a, STensor3& U, STensor3&R);