added long double support for printing values

include/internal/catch_polyfills.cpp

@@ -18,6 +18,9 @@ namespace Catch {
     bool isnan(double d) {
         return std::isnan(d);
     }
+    bool isnan(long double d) {
+        return std::isnan(d);
+    }
 #else
     // For now we only use this for embarcadero
     bool isnan(float f) {
@@ -26,6 +29,9 @@ namespace Catch {
     bool isnan(double d) {
         return std::_isnan(d);
     }
+    bool isnan(long double d) {
+        return std::_isnan(d);
+    }
 #endif
 
 } // end namespace Catch

include/internal/catch_polyfills.hpp

@@ -10,6 +10,7 @@
 namespace Catch {
     bool isnan(float f);
     bool isnan(double d);
+    bool isnan(long double d);
 }
 
 #endif // TWOBLUECUBES_CATCH_POLYFILLS_HPP_INCLUDED

include/internal/catch_tostring.cpp

@@ -73,7 +73,8 @@ std::string fpToString( T value, int precision ) {
 
     ReusableStringStream rss;
     rss << std::setprecision( precision )
-        << std::fixed
+		<< std::fixed
+//        << std::scientific    // would be nice if we could switch between these two !
         << value;
     std::string d = rss.str();
     std::size_t i = d.find_last_not_of( '0' );
@@ -250,6 +251,13 @@ std::string StringMaker<double>::convert(double value) {
     return fpToString(value, precision);
 }
 
+int StringMaker<long double>::precision = 15;
+
+std::string StringMaker<long double>::convert(long double value) {
+    return fpToString(value, precision);
+}
+
+
 std::string ratio_string<std::atto>::symbol() { return "a"; }
 std::string ratio_string<std::femto>::symbol() { return "f"; }
 std::string ratio_string<std::pico>::symbol() { return "p"; }

include/internal/catch_tostring.h

@@ -276,6 +276,12 @@ namespace Catch {
         static int precision;
     };
 
+    template<>
+    struct StringMaker<long double> {
+        static std::string convert(long double value);
+        static int precision;
+    };
+
     template <typename T>
     struct StringMaker<T*> {
         template <typename U>