Enable /WX, warning as error on Visual Studio

test/gtx/gtx_range.cpp

@@ -6,40 +6,68 @@
 
 #include <glm/gtx/range.hpp>
 
-int testVec()
+int test_vec()
 {
-	int Error(0);
-	glm::vec3 v(1, 2, 3);
+	int Error = 0;
 
-	int count = 0;
-	for(float x : v){ count++; }
-	Error += count == 3 ? 0 : 1;
+	{
+		glm::ivec3 const v(1, 2, 3);
+
+		int count = 0;
+		glm::ivec3 Result(0);
+		for(int x : v)
+		{
+			Result[count] = x;
+			count++;
+		}
+		Error += count == 3 ? 0 : 1;
+		Error += v == Result ? 0 : 1;
+	}
+
+	{
+		glm::ivec3 v(1, 2, 3);
+		for(int& x : v)
+			x = 0;
+		Error += glm::all(glm::equal(v, glm::ivec3(0))) ? 0 : 1;
+	}
 
-	for(float& x : v){ x = 0; }
-	Error += glm::all(glm::equal(v, glm::vec3(0, 0, 0))) ? 0 : 1;
 	return Error;
 }
 
-int testMat()
+int test_mat()
 {
-	int Error(0);
-	glm::mat4x3 m(1);
+	int Error = 0;
 
-	int count = 0;
-	for(float x : m){ count++; }
-	Error += count == 12 ? 0 : 1;
+	{
+		glm::mat4x3 m(1.0f);
+
+		int count = 0;
+		float Sum = 0.0f;
+		for(float x : m)
+		{
+			count++;
+			Sum += x;
+		}
+		Error += count == 12 ? 0 : 1;
+		Error += glm::epsilonEqual(Sum, 3.0f, 0.001f) ? 0 : 1;
+	}
+
+	{
+		glm::mat4x3 m(1.0f);
+
+		for (float& x : m) { x = 0; }
+		glm::vec4 v(1, 1, 1, 1);
+		Error += glm::all(glm::equal(m*v, glm::vec3(0, 0, 0))) ? 0 : 1;
+	}
 
-	for(float& x : m){ x = 0; }
-	glm::vec4 v(1, 1, 1, 1);
-	Error += glm::all(glm::equal(m*v, glm::vec3(0, 0, 0))) ? 0 : 1;
 	return Error;
 }
 
 int main()
 {
-	int Error(0);
-	Error += testVec();
-	Error += testMat();
+	int Error = 0;
+	Error += test_vec();
+	Error += test_mat();
 	return Error;
 }