add nbl::system::to_string utility function

all credit goes to @Przemog1

Author: devshgraphicsprogramming

include/nbl/system/to_string.h

@@ -0,0 +1,83 @@
+#ifndef _NBL_SYSTEM_TO_STRING_INCLUDED_
+#define _NBL_SYSTEM_TO_STRING_INCLUDED_
+
+#include <nbl/builtin/hlsl/cpp_compat.hlsl>
+#include <nbl/builtin/hlsl/emulated/int64_t.hlsl>
+#include <nbl/builtin/hlsl/morton.hlsl>
+
+namespace nbl
+{
+namespace system
+{
+namespace impl
+{
+
+template<typename T>
+struct to_string_helper
+{
+    static std::string __call(const T& value)
+    {
+        return std::to_string(value);
+    }
+};
+
+template<>
+struct to_string_helper<hlsl::emulated_uint64_t>
+{
+    static std::string __call(const hlsl::emulated_uint64_t& value)
+    {
+        return std::to_string(static_cast<uint64_t>(value));
+    }
+};
+
+template<>
+struct to_string_helper<hlsl::emulated_int64_t>
+{
+    static std::string __call(const hlsl::emulated_int64_t& value)
+    {
+        return std::to_string(static_cast<int64_t>(value));
+    }
+};
+
+template<typename T, int16_t N>
+struct to_string_helper<hlsl::vector<T, N>>
+{
+    static std::string __call(const hlsl::vector<T, N>& value)
+    {
+        std::stringstream output;
+        output << "{ ";
+        for (int i = 0; i < N; ++i)
+        {
+            output << to_string_helper<T>::__call(value[i]);
+
+            if (i < N - 1)
+                output << ", ";
+        }
+        output << " }";
+
+        return output.str();
+    }
+};
+
+template<bool Signed, uint16_t Bits, uint16_t D, typename _uint64_t>
+struct to_string_helper<hlsl::morton::code<Signed, Bits, D, _uint64_t>>
+{
+    using value_t = hlsl::morton::code<Signed, Bits, D, _uint64_t>;
+    static std::string __call(value_t value)
+    {
+        return to_string_helper<value_t::storage_t>::__call(value.value);
+    }
+};
+
+
+}
+
+template<typename T>
+std::string to_string(T value)
+{
+    return impl::to_string_helper<T>::__call(value);
+}
+}
+}
+
+#endif