Move Hash2Doubles to separate translation unit

Core/Multilayer/Hash2Doubles.cpp

+// ************************************************************************** //
+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      Core/Computation/Hash2Doubles.cpp
+//! @brief     Implements class Hash2Doubles.
+//!
+//! @homepage  http://www.bornagainproject.org
+//! @license   GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2017
+//! @authors   Scientific Computing Group at MLZ Garching
+//! @authors   J. Burle, J. M. Fisher, M. Ganeva, G. Pospelov, W. Van Herck, J. Wuttke
+//
+// ************************************************************************** //
+
+#include "Hash2Doubles.h"
+
+// Simple exclusive or of the std::hash<double> of its parts
+size_t Hash2Doubles::operator()(std::pair<double, double> doubles) const noexcept
+{
+    return m_double_hash(doubles.first) ^ m_double_hash(doubles.second);
+}

Core/Multilayer/Hash2Doubles.h

+//
+//  BornAgain: simulate and fit scattering at grazing incidence
+//
+//! @file      Core/Computation/Hash2Doubles.h
+//! @brief     Defines class Hash2Doubles.
+//!
+//! @homepage  http://www.bornagainproject.org
+//! @license   GNU General Public License v3 or higher (see COPYING)
+//! @copyright Forschungszentrum Jülich GmbH 2017
+//! @authors   Scientific Computing Group at MLZ Garching
+//! @authors   J. Burle, J. M. Fisher, M. Ganeva, G. Pospelov, W. Van Herck, J. Wuttke
+//
+// ************************************************************************** //
+
+#ifndef HASH2DOUBLES_H
+#define HASH2DOUBLES_H
+
+#include <functional>
+#include <utility>
+
+class Hash2Doubles
+{
+public:
+    Hash2Doubles() {}
+    ~Hash2Doubles() {}
+
+    size_t operator()(std::pair<double, double> doubles) const noexcept;
+private:
+    std::hash<double> m_double_hash;
+};
+
+#endif // HASH2DOUBLES_H

Core/Multilayer/HashKVector.cpp

@@ -20,8 +20,3 @@ size_t HashKVector::operator()(kvector_t kvec) const noexcept
 {
     return m_double_hash(kvec.x()) ^ m_double_hash(kvec.y()) ^ m_double_hash(kvec.z());
 }
-
-size_t Hash2Doubles::operator()(std::pair<double, double> doubles) const noexcept
-{
-    return m_double_hash(doubles.first) ^ m_double_hash(doubles.second);
-}

Core/Multilayer/HashKVector.h

@@ -31,15 +31,4 @@ private:
     std::hash<double> m_double_hash;
 };
 
-class Hash2Doubles
-{
-public:
-    Hash2Doubles() {}
-    ~Hash2Doubles() {}
-
-    size_t operator()(std::pair<double, double> doubles) const noexcept;
-private:
-    std::hash<double> m_double_hash;
-};
-
 #endif // HASHKVECTOR_H

Core/Multilayer/ScalarFresnelMap.h

@@ -16,8 +16,9 @@
 #ifndef SCALARFRESNELMAP_H
 #define SCALARFRESNELMAP_H
 
-#include "HashKVector.h"
+#include "Hash2Doubles.h"
 #include "IFresnelMap.h"
+#include "Vectors3D.h"
 #include <unordered_map>
 #include <utility>
 #include <vector>