From 7b31e56fbff1014350c0b315373679f2b76afe95 Mon Sep 17 00:00:00 2001
From: lieff <lieff@users.noreply.github.com>
Date: Mon, 25 Feb 2019 16:38:22 +0300
Subject: [PATCH] fix GCC 7.1.1 - 7.2.1 on CentOS closes
 https://github.com/nlohmann/json/issues/670

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

diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 3554be12..f0aff55e 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -2859,7 +2859,7 @@ class basic_json
 
 #ifndef _MSC_VER  // fix for issue #167 operator<< ambiguity under VS2015
                    and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
-#if defined(JSON_HAS_CPP_17) && defined(_MSC_VER) and _MSC_VER <= 1914
+#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) and _MSC_VER <= 1914))
                    and not std::is_same<ValueType, typename std::string_view>::value
 #endif
 #endif
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 1b83be0b..d66a9b36 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -15367,7 +15367,7 @@ class basic_json
 
 #ifndef _MSC_VER  // fix for issue #167 operator<< ambiguity under VS2015
                    and not std::is_same<ValueType, std::initializer_list<typename string_t::value_type>>::value
-#if defined(JSON_HAS_CPP_17) && defined(_MSC_VER) and _MSC_VER <= 1914
+#if defined(JSON_HAS_CPP_17) && (defined(__GNUC__) || (defined(_MSC_VER) and _MSC_VER <= 1914))
                    and not std::is_same<ValueType, typename std::string_view>::value
 #endif
 #endif