From 052066b7b2e24444df5761169dab9834921e973d Mon Sep 17 00:00:00 2001
From: dragonmux <git@dragonmux.network>
Date: Wed, 10 May 2023 13:07:35 +0100
Subject: [PATCH] Fixed the trailing return types being required for
 substrate::span to compile cleanly

---
 substrate/span | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/substrate/span b/substrate/span
index 97195fde..a9a3de87 100644
--- a/substrate/span
+++ b/substrate/span
@@ -25,11 +25,11 @@ namespace substrate
 {
 	template<typename...> using void_t = void;
 
-	template<typename C> constexpr auto data(C &c) { return c.data(); }
-	template<typename C> constexpr auto data(const C &c) { return c.data(); }
+	template<typename C> constexpr auto data(C &c) -> decltype(c.data()) { return c.data(); }
+	template<typename C> constexpr auto data(const C &c) -> decltype(c.data()) { return c.data(); }
 	template<typename T, std::size_t N> constexpr T *data(T (&array)[N]) noexcept { return array; }
 	template<typename E> constexpr const E *data(std::initializer_list<E> il) noexcept { return il.data(); }
-	template<typename C> constexpr auto size(const C &c) { return c.size(); }
+	template<typename C> constexpr auto size(const C &c) -> decltype(c.size()) { return c.size(); }
 	template<typename T, std::size_t N> constexpr std::size_t size(const T (&array)[N]) noexcept { return N; }
 	template<typename T, std::size_t N> constexpr std::ptrdiff_t ssize(const T (&array)[N]) noexcept
 		{ return static_cast<std::ptrdiff_t>(N); }