From 5212992f059cda11aab7d10ab8cb945d389959a5 Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Fri, 27 Mar 2020 18:02:37 +0900
Subject: [PATCH] feat: add is_std_forward_list

std::forward_list does not have push_back, insert, or emplace but
push_front, insert_after, and emplace_after. We need to distinguish it
from other continers.
---
 toml/traits.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/toml/traits.hpp b/toml/traits.hpp
index 2fd36a2..31037f4 100644
--- a/toml/traits.hpp
+++ b/toml/traits.hpp
@@ -7,6 +7,7 @@
 #include <chrono>
 #include <tuple>
 #include <string>
+#include <forward_list>
 #if __cplusplus >= 201703L
 #if __has_include(<string_view>)
 #include <string_view>
@@ -157,6 +158,10 @@ template<typename T> struct is_std_tuple : std::false_type{};
 template<typename ... Ts>
 struct is_std_tuple<std::tuple<Ts...>> : std::true_type{};
 
+template<typename T> struct is_std_forward_list : std::false_type{};
+template<typename T>
+struct is_std_forward_list<std::forward_list<T>> : std::true_type{};
+
 template<typename T> struct is_chrono_duration: std::false_type{};
 template<typename Rep, typename Period>
 struct is_chrono_duration<std::chrono::duration<Rep, Period>>: std::true_type{};