1 files changed, 4 insertions, 2 deletions
diff --git a/Source/Particles/Gather/GetExternalFields.H b/Source/Particles/Gather/GetExternalFields.H
index 92f1a21bc..ff107dce5 100644
--- a/Source/Particles/Gather/GetExternalFields.H
+++ b/Source/Particles/Gather/GetExternalFields.H
@@ -13,13 +13,12 @@
 #include <AMReX_Parser.H>
 #include <AMReX_REAL.H>
 
-enum ExternalFieldInitType { None, Constant, Parser, RepeatedPlasmaLens, Unknown };
-
 /** \brief Functor class that assigns external
  *         field values (E and B) to particles.
 */
 struct GetExternalEBField
 {
+    enum ExternalFieldInitType { None, Constant, Parser, RepeatedPlasmaLens, Unknown };
 
     GetExternalEBField () = default;
 
@@ -56,6 +55,9 @@ struct GetExternalEBField
     const amrex::ParticleReal* AMREX_RESTRICT m_uz = nullptr;
 
     AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
+    bool isNoOp () const { return (m_Etype == None && m_Btype == None); }
+
+    AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
     void operator () (long i,
                       amrex::ParticleReal& field_Ex,
                       amrex::ParticleReal& field_Ey,