From 59588e3a10af176d84ddf8fbe60cd825c4113c5f Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Sun, 2 Dec 2018 23:16:28 +0900
Subject: [PATCH] add static_assert and useful member funcs

---
 toml/region.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/toml/region.hpp b/toml/region.hpp
index df97f0d..355c785 100644
--- a/toml/region.hpp
+++ b/toml/region.hpp
@@ -16,6 +16,7 @@ namespace detail
 template<typename Container>
 struct location
 {
+    static_assert(std::is_same<char, typename Container::value_type>::value,"");
     using const_iterator = typename Container::const_iterator;
 
     location(Container cont)
@@ -39,6 +40,7 @@ struct location
 template<typename Container>
 struct region
 {
+    static_assert(std::is_same<char, typename Container::value_type>::value,"");
     using const_iterator = typename Container::const_iterator;
 
     region(const location<Container>& loc)
@@ -65,6 +67,9 @@ struct region
     region& operator=(region&&)      = default;
     ~region() = default;
 
+    std::string str()  const {return std::string(first, last);}
+    std::size_t size() const {return std::distance(first, last);}
+
     const_iterator begin, first, last, end;
     std::shared_ptr<const Container> source;
 };