From 4e11afe5b5d73ce90169a2658f019384f2de33e8 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Thu, 30 Aug 2018 21:14:37 +0100
Subject: Add constexpr functions for identifying char ranges

---
 libadhocutil/compileTimeFormatter.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/libadhocutil/compileTimeFormatter.h b/libadhocutil/compileTimeFormatter.h
index 8d60800..bb80edf 100644
--- a/libadhocutil/compileTimeFormatter.h
+++ b/libadhocutil/compileTimeFormatter.h
@@ -7,6 +7,19 @@
 #include "unique.h"
 
 namespace AdHoc {
+	// Template char utils
+	template<typename char_type>
+	constexpr bool isdigit(const char_type & ch)
+	{
+		return (ch >= '0' && ch <= '9');
+	}
+
+	template<typename char_type>
+	constexpr bool ispositivedigit(const char_type & ch)
+	{
+		return (ch >= '1' && ch <= '9');
+	}
+
 	// Template string utils
 	template<const auto & S>
 	static constexpr auto strlen()
-- 
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