From 6eb37e9b7881057b6f6fb646a46fd2c1ea4c79a1 Mon Sep 17 00:00:00 2001
From: Anthony VH <anthony@anthonyvh.com>
Date: Thu, 14 Jan 2021 12:39:03 +0100
Subject: [PATCH] Only add conditional constexpr to get() for >= C++14 to work
 around errors on older compilers.

---
 include/nlohmann/json.hpp        | 5 ++++-
 single_include/nlohmann/json.hpp | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index a7adb724f..e5a7917c5 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -3063,7 +3063,10 @@ class basic_json
     @since version 2.1.0
     */
     template < typename ValueTypeCV, typename ValueType = detail::uncvref_t<ValueTypeCV>>
-    constexpr auto get() const noexcept(
+#if defined(JSON_HAS_CPP_14)
+    constexpr
+#endif
+    auto get() const noexcept(
     noexcept(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {})))
     -> decltype(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {}))
     {
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index f7ee9030b..7ce313829 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -19815,7 +19815,10 @@ class basic_json
     @since version 2.1.0
     */
     template < typename ValueTypeCV, typename ValueType = detail::uncvref_t<ValueTypeCV>>
-    constexpr auto get() const noexcept(
+#if defined(JSON_HAS_CPP_14)
+    constexpr
+#endif
+    auto get() const noexcept(
     noexcept(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {})))
     -> decltype(std::declval<const basic_json_t&>().template get_impl<ValueType>(detail::priority_tag<4> {}))
     {