From 54f5f2d1703e219dbe9c6505221fd80b0c4655fe Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 13 Apr 2015 21:46:56 +1000
Subject: [PATCH] tap: add expect_nan function

---
 tap.hpp |  4 ++++
 tap.ipp | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/tap.hpp b/tap.hpp
index 57eea4ba..c1ddf001 100644
--- a/tap.hpp
+++ b/tap.hpp
@@ -52,6 +52,10 @@ namespace util { namespace TAP {
         template <typename T, typename U> void expect_lt (const T&, const U&, const std::string &msg = "lt");
         template <typename T, typename U> void expect_le (const T&, const U&, const std::string &msg = "le");
 
+        //---------------------------------------------------------------------
+        template <typename T> void expect_nan (const T&, const std::string &msg = "nan");
+
+        //---------------------------------------------------------------------
         void skip (const std::string &msg);
         void todo (const std::string &msg);
         void noop (void);
diff --git a/tap.ipp b/tap.ipp
index fa16d456..42e797f6 100644
--- a/tap.ipp
+++ b/tap.ipp
@@ -77,3 +77,13 @@ TAP_TEST(lt, < )
 TAP_TEST(le, <=)
 
 #undef TAP_TEST
+
+
+//-----------------------------------------------------------------------------
+template <typename T>
+void
+util::TAP::logger::expect_nan (const T &t, const std::string &msg)
+{
+    bool(*func)(T) = std::isnan;
+    expect<const T&> (func, t, msg);
+}