Reduce the number of calling the numeric_limits constructor.

- Create a test module for Point.
- Add test cases.

mert/Jamfile

@@ -58,6 +58,7 @@ unit-test feature_data_test : FeatureDataTest.cpp mert_lib ..//boost_unit_test_f
 unit-test data_test : DataTest.cpp mert_lib ..//boost_unit_test_framework ;
 unit-test ngram_test : NgramTest.cpp mert_lib ..//boost_unit_test_framework ;
 unit-test optimizer_factory_test : OptimizerFactoryTest.cpp mert_lib ..//boost_unit_test_framework ;
+unit-test point_test : PointTest.cpp mert_lib ..//boost_unit_test_framework ;
 unit-test reference_test : ReferenceTest.cpp mert_lib ..//boost_unit_test_framework ;
 unit-test singleton_test : SingletonTest.cpp mert_lib ..//boost_unit_test_framework ;
 unit-test timer_test : TimerTest.cpp mert_lib ..//boost_unit_test_framework ;

mert/Optimizer.h

@@ -10,6 +10,8 @@
 
 using namespace std;
 
+static const float kMaxFloat = numeric_limits<float>::max();
+
 class Point;
 
 /**

mert/Point.cpp

@@ -3,8 +3,8 @@
 #include <cmath>
 #include <cstdlib>
 #include "util/check.hh"
-#include <limits>
 #include "FeatureStats.h"
+#include "Optimizer.h"
 
 using namespace std;
 
@@ -84,7 +84,7 @@ Point Point::operator+(const Point& p2) const
     Res[i] += p2[i];
   }
 
-  Res.m_score = numeric_limits<statscore_t>::max();
+  Res.m_score = kMaxFloat;
   return Res;
 }
 
@@ -94,7 +94,7 @@ void Point::operator+=(const Point& p2)
   for (unsigned i = 0; i < size(); i++) {
     operator[](i) += p2[i];
   }
-  m_score = numeric_limits<statscore_t>::max();
+  m_score = kMaxFloat;
 }
 
 Point Point::operator*(float l) const
@@ -103,7 +103,7 @@ Point Point::operator*(float l) const
   for (unsigned i = 0; i < size(); i++) {
     Res[i] *= l;
   }
-  Res.m_score = numeric_limits<statscore_t>::max();
+  Res.m_score = kMaxFloat;
   return Res;
 }
 

mert/PointTest.cpp

@@ -0,0 +1,29 @@
+#include "Point.h"
+
+#define BOOST_TEST_MODULE MertPoint
+#include <boost/test/unit_test.hpp>
+
+#include "Optimizer.h"
+
+BOOST_AUTO_TEST_CASE(point_operators) {
+  // Test operator '+'
+  {
+    Point p1, p2;
+    Point p3 = p1 + p2;
+    BOOST_CHECK_EQUAL(p3.GetScore(), kMaxFloat);
+  }
+
+  // Test operator '+='
+  {
+    Point p1, p2;
+    p1 += p2;
+    BOOST_CHECK_EQUAL(p1.GetScore(), kMaxFloat);
+  }
+
+  // Test operator '*'
+  {
+    Point p1;
+    const Point p2 = p1 * 2.0;
+    BOOST_CHECK_EQUAL(p2.GetScore(), kMaxFloat);
+  }
+}