Delete nullptr Json::Value constructor (open-source-parsers#1194)

nathanruiz · web-flow · commit c8453d39d1d9 · 2020-06-23T14:52:28.000-07:00
This patch adds an explicit ctor with a std::nullptr_t argument, that is `delete`-d. This keeps Json::Value from exposing a coding error when automatically promoted to a const char* type.
diff --git a/include/json/value.h b/include/json/value.h
@@ -342,6 +342,7 @@ class JSON_API Value {
   Value(const StaticString& value);
   Value(const String& value);
   Value(bool value);
+  Value(std::nullptr_t ptr) = delete;
   Value(const Value& other);
   Value(Value&& other);
   ~Value();
