From c9590db18888376f94e6c4752e9192088a2fecac Mon Sep 17 00:00:00 2001
From: Max Kellermann <mk@cm4all.com>
Date: Tue, 24 Sep 2019 15:16:07 +0200
Subject: [PATCH] util/StringView: enable string_view support only on C++17
---
src/util/StringView.hxx | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/util/StringView.hxx b/src/util/StringView.hxx
index 2e107dcbe..8b5064785 100644
--- a/src/util/StringView.hxx
+++ b/src/util/StringView.hxx
@@ -36,7 +36,7 @@
#include <utility>
-#if !GCC_OLDER_THAN(7,0)
+#if __cplusplus >= 201703L && !GCC_OLDER_THAN(7,0)
#include <string_view>
#endif
@@ -71,7 +71,7 @@ struct BasicStringView : ConstBuffer<T> {
constexpr BasicStringView(std::nullptr_t n) noexcept
:ConstBuffer<T>(n) {}
-#if !GCC_OLDER_THAN(7,0)
+#if __cplusplus >= 201703L && !GCC_OLDER_THAN(7,0)
constexpr BasicStringView(std::basic_string_view<T> src) noexcept
:ConstBuffer<T>(src.data(), src.size()) {}