From 0d1ee21cb2335181d4d1108cda1216b11e95d298 Mon Sep 17 00:00:00 2001
From: fabian <ichmagkatzenbabies@gmx.de>
Date: Tue, 23 Apr 2024 12:13:57 +0200
Subject: [PATCH] make project compileable with VS2013

---
 include/json/value.h        |  8 ++++++++
 src/lib_json/json_value.cpp | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/include/json/value.h b/include/json/value.h
index c2efe95..8b9efd1 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -256,7 +256,15 @@ public:
   // The constant is hard-coded because some compiler have trouble
   // converting Value::maxUInt64 to a double correctly (AIX/xlC).
   // Assumes that UInt64 is a 64 bits integer.
+#if JSONCPP_CXX_STD_11
   static JSONCPP_CONST double maxUInt64AsDouble = 18446744073709551615.0;
+#else
+  // In-class initializer for static data member of type 'const double' is a GNU
+  // extension. JSONCPP_CONST == const, if C++0x.
+  // So initialization has to be done in json_value.cpp to make this project
+  // compileable with e.g. VS2013
+  static JSONCPP_CONST double maxUInt64AsDouble;
+#endif
 // Workaround for bug in the NVIDIAs CUDA 9.1 nvcc compiler
 // when using gcc and clang backend compilers.  CZString
 // cannot be defined as private.  See issue #486
diff --git a/src/lib_json/json_value.cpp b/src/lib_json/json_value.cpp
index 2938ea5..64ef81b 100644
--- a/src/lib_json/json_value.cpp
+++ b/src/lib_json/json_value.cpp
@@ -334,6 +334,16 @@ bool Value::CZString::isStaticString() const {
 // //////////////////////////////////////////////////////////////////
 // //////////////////////////////////////////////////////////////////
 
+#if JSONCPP_CXX_STD_11
+
+#else
+// In-class initializer for static data member of type 'const double' is a GNU
+// extension. JSONCPP_CONST == const, if C++0x.
+// So initialization has to be done in json_value.cpp to make this project
+// compileable with e.g. VS2013.
+JSONCPP_CONST double Value::maxUInt64AsDouble = 18446744073709551615.0;
+#endif
+
 /*! \internal Default constructor initialization must be equivalent to:
  * memset( this, 0, sizeof(Value) )
  * This optimization is used in ValueInternalMap fast allocator.