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src/ltk/test_comma.h

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+/*//////////////////////////////////////////////////////////////////////////////
+// CMT Cosmic Muon Tomography project //////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+
+  Copyright (c) 2014, Universita' degli Studi di Padova, INFN sez. di Padova
+  All rights reserved
+
+  Authors: Andrea Rigoni Garola < andrea.rigoni@pd.infn.it >
+
+  ------------------------------------------------------------------
+  This library is free software;  you  can  redistribute  it  and/or
+  modify it  under the  terms  of  the  GNU  Lesser  General  Public
+  License as published  by  the  Free  Software  Foundation;  either
+  version 3.0 of the License, or (at your option) any later version.
+
+  This library is  distributed in  the hope that it will  be useful,
+  but  WITHOUT ANY WARRANTY;  without  even  the implied warranty of
+  MERCHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of  the GNU Lesser General  Public
+  License along with this library.
+
+//////////////////////////////////////////////////////////////////////////////*/
+
+
+
+/* 
+ * File:   test_comma.h
+ * Author: andrea
+ *
+ * Created on May 24, 2012, 4:47 PM
+ */
+
+#ifndef TEST_COMMA_H
+#define	TEST_COMMA_H
+
+#include <assert.h>
+
+struct Vector3
+{
+    union
+    {
+	struct { float x, y, z; };
+	float data[3];
+    };
+
+   struct CommaAssign;
+
+    CommaAssign operator=(float _x)
+   {
+      x = _x;
+      return CommaAssign(this,1);
+   }
+
+   struct CommaAssign
+    {
+	Vector3 *vec3;
+	int index;
+
+	explicit CommaAssign(Vector3 *vec3, int index) : vec3(vec3) {
+	    this->index = index;
+	}
+	CommaAssign operator, (float f) {
+	    vec3->data[index] = f;
+	    return CommaAssign(vec3, index + 1);
+	}
+
+    };
+
+};
+
+
+
+struct Container
+{
+    union
+    {
+	struct { float x, y, z; };
+	float data[3];
+    };
+
+    inline float *getBuffer() {
+	return this->data;
+    }
+
+   template <typename T, unsigned int size> class CommaAssign
+    {
+    private:
+	T *container;
+	int index;
+
+    public:
+	inline explicit CommaAssign(T *container, float s) : container(container) {
+	    this->index = 0;
+	    this->container->getBuffer()[0] = s;
+	}
+
+	inline CommaAssign& operator, (float s) {
+	    this->index++;
+	    assert(index < size);
+	    this->container->getBuffer()[this->index] = s;
+	    return *this;
+	}
+    };
+
+    CommaAssign<Container, 3> operator=(float s) {
+	return CommaAssign<Container, 3 > (this, s);
+    }
+
+};
+
+
+
+
+#endif	/* TEST_COMMA_H */
+