Fixed problem with casting of negative values to fload and long double issue #145

cppcms/json.h

@@ -706,7 +706,7 @@ namespace json {
 		static float get(value const &v)
 		{
 			double r=v.number();
-			if(	r < std::numeric_limits<float>::min()
+			if(	r < (-std::numeric_limits<float>::max()) // actually should be C++11 lowest, but it should be under IEEE float lowest()=-max()
 			     || std::numeric_limits<float>::max() < r )
 			{
 				throw bad_value_cast();
@@ -727,7 +727,7 @@ namespace json {
 		}
 		static void set(value &v,long double const &in)
 		{
-			if( in < std::numeric_limits<double>::min()
+			if( in < -std::numeric_limits<double>::max() // should actually be std::numeric_limits<float>::lowest() but it is ==-max()
 			     || std::numeric_limits<double>::max() < in )
 			{
 				throw bad_value_cast();

tests/json_test.cpp

@@ -227,6 +227,14 @@ int main()
 		TEST(v.type() == cppcms::json::is_object);
 		TEST(!v.load(part,part+4,true));
 
+		{
+			json::value v;
+			v["x"]=-10.0;
+			TEST(v.get<float>("x")==-10.0f);
+			TEST(v.get<double>("x")==-10.0);
+			TEST(v.get<long double>("x")==-10.0);
+		}
+
 	}
 	catch(std::exception const &e)
 	{