From 4e993f2d4dfaecbddd0d7f2641b1dfa0f0ba0b1c Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Thu, 9 Feb 2017 16:48:42 +1100
Subject: [PATCH] introspection: add type_char trait

---
 introspection.hpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/introspection.hpp b/introspection.hpp
index e1287468..b0de712c 100644
--- a/introspection.hpp
+++ b/introspection.hpp
@@ -78,6 +78,26 @@ namespace util {
     { return type_name_v<T>; }
 
 
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename T>
+    struct type_char;
+
+    template <> struct type_char<float > { static constexpr char value = 'f'; };
+    template <> struct type_char<double> { static constexpr char value = 'd'; };
+
+    template <> struct type_char<  int8_t> { static constexpr char value = 'i'; };
+    template <> struct type_char< int16_t> { static constexpr char value = 'i'; };
+    template <> struct type_char< int32_t> { static constexpr char value = 'i'; };
+    template <> struct type_char< int64_t> { static constexpr char value = 'i'; };
+
+    template <> struct type_char< uint8_t> { static constexpr char value = 'u'; };
+    template <> struct type_char<uint16_t> { static constexpr char value = 'u'; };
+    template <> struct type_char<uint32_t> { static constexpr char value = 'u'; };
+    template <> struct type_char<uint64_t> { static constexpr char value = 'u'; };
+
+    template <typename T>
+    constexpr auto type_char_v = type_char<T>::value;
+
     ///////////////////////////////////////////////////////////////////////////
     /// Lists valid values of an enumeration
     ///