Guard against min/max being macros in document.h

Sometimes, particularly when Microsoft's windows.h is included, min/max
are defined as macros, interfering with use of
std::numeric_limits::min() and the like.

To guard against this, the function name is wrapped in an extra set of
parenthesis, which inhibits function-style macro expansion.

include/rapidjson/document.h

@@ -29,14 +29,6 @@ RAPIDJSON_DIAG_PUSH
 #ifdef _MSC_VER
 RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
 RAPIDJSON_DIAG_OFF(4244) // conversion from kXxxFlags to 'uint16_t', possible loss of data
-#ifdef _MINWINDEF_       // see: http://stackoverflow.com/questions/22744262/cant-call-stdmax-because-minwindef-h-defines-max
-#ifndef NOMINMAX
-#pragma push_macro("min")
-#pragma push_macro("max")
-#undef min
-#undef max
-#endif
-#endif
 #endif
 
 #ifdef __clang__
@@ -1018,14 +1010,14 @@ class GenericValue {
             uint64_t u = GetUint64();
             volatile double d = static_cast<double>(u);
             return (d >= 0.0)
-                && (d < static_cast<double>(std::numeric_limits<uint64_t>::max()))
+                && (d < static_cast<double>((std::numeric_limits<uint64_t>::max)()))
                 && (u == static_cast<uint64_t>(d));
         }
         if (IsInt64()) {
             int64_t i = GetInt64();
             volatile double d = static_cast<double>(i);
-            return (d >= static_cast<double>(std::numeric_limits<int64_t>::min()))
-                && (d < static_cast<double>(std::numeric_limits<int64_t>::max()))
+            return (d >= static_cast<double>((std::numeric_limits<int64_t>::min)()))
+                && (d < static_cast<double>((std::numeric_limits<int64_t>::max)()))
                 && (i == static_cast<int64_t>(d));
         }
         return true; // double, int, uint are always lossless
@@ -1042,8 +1034,8 @@ class GenericValue {
     bool IsLosslessFloat() const {
         if (!IsNumber()) return false;
         double a = GetDouble();
-        if (a < static_cast<double>(-std::numeric_limits<float>::max())
-                || a > static_cast<double>(std::numeric_limits<float>::max()))
+        if (a < static_cast<double>(-(std::numeric_limits<float>::max)())
+                || a > static_cast<double>((std::numeric_limits<float>::max)()))
             return false;
         double b = static_cast<double>(static_cast<float>(a));
         return a >= b && a <= b;    // Prevent -Wfloat-equal
@@ -2616,12 +2608,6 @@ class GenericObject {
 };
 
 RAPIDJSON_NAMESPACE_END
-#ifdef _MINWINDEF_       // see: http://stackoverflow.com/questions/22744262/cant-call-stdmax-because-minwindef-h-defines-max
-#ifndef NOMINMAX
-#pragma pop_macro("min")
-#pragma pop_macro("max")
-#endif
-#endif
 RAPIDJSON_DIAG_POP
 
 #endif // RAPIDJSON_DOCUMENT_H_