From 75e9b1831e252610f808810eaf094501e1b9bef3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Del=20Pino?= <stephane.delpino44@gmail.com>
Date: Sat, 31 Jul 2021 15:38:12 +0200
Subject: [PATCH] Add NaNHelper utility
The aim of this helper is to allow to print signaling NaN.
This should help to debug uninitialized matrices of vectors values
while printing them.
---
src/utils/NaNHelper.hpp | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 src/utils/NaNHelper.hpp
diff --git a/src/utils/NaNHelper.hpp b/src/utils/NaNHelper.hpp
new file mode 100644
index 000000000..d77d1d9f1
--- /dev/null
+++ b/src/utils/NaNHelper.hpp
@@ -0,0 +1,38 @@
+#ifndef NAN_HELPER_HPP
+#define NAN_HELPER_HPP
+
+#include <cmath>
+#include <iostream>
+#include <type_traits>
+
+template <typename T>
+class NaNHelper
+{
+ private:
+ const T& m_t;
+
+ public:
+ friend std::ostream&
+ operator<<(std::ostream& os, const NaNHelper<T>& helper)
+ {
+ if constexpr (std::is_arithmetic_v<T>) {
+ if (std::isnan(helper.m_t)) {
+ os << "nan";
+ } else {
+ os << helper.m_t;
+ }
+ } else {
+ os << helper.m_t;
+ }
+ return os;
+ }
+ NaNHelper(const T& t) : m_t{t} {}
+
+ NaNHelper(NaNHelper&&) = delete;
+ NaNHelper(const NaNHelper&) = delete;
+
+ NaNHelper() = delete;
+ ~NaNHelper() = default;
+};
+
+#endif // NAN_HELPER_HPP
--
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