revert 'Made it possible to drop null placeholders from array output.'

revert ae3c7a7

Author: cdunn2001

include/json/writer.h

@@ -153,13 +153,6 @@ class JSON_API FastWriter : public Writer {
 
   void enableYAMLCompatibility();
 
-  /** \brief Drop the "null" string from the writer's output for nullValues.
-   * Strictly speaking, this is not valid JSON. But when the output is being
-   * fed to a browser's Javascript, it makes for smaller output and the
-   * browser can handle the output just fine.
-   */
-  void dropNullPlaceholders();
-
 public: // overridden from Writer
   virtual std::string write(const Value& root);
 
@@ -168,7 +161,6 @@ class JSON_API FastWriter : public Writer {
 
   std::string document_;
   bool yamlCompatiblityEnabled_;
-  bool dropNullPlaceholders_;
 };
 
 /** \brief Writes a Value in <a HREF="http://www.json.org">JSON</a> format in a

src/lib_json/json_writer.cpp

@@ -192,12 +192,10 @@ Writer::~Writer() {}
 // //////////////////////////////////////////////////////////////////
 
 FastWriter::FastWriter()
-    : yamlCompatiblityEnabled_(false), dropNullPlaceholders_(false) {}
+    : yamlCompatiblityEnabled_(false) {}
 
 void FastWriter::enableYAMLCompatibility() { yamlCompatiblityEnabled_ = true; }
 
-void FastWriter::dropNullPlaceholders() { dropNullPlaceholders_ = true; }
-
 std::string FastWriter::write(const Value& root) {
   document_ = "";
   writeValue(root);
@@ -208,8 +206,7 @@ std::string FastWriter::write(const Value& root) {
 void FastWriter::writeValue(const Value& value) {
   switch (value.type()) {
   case nullValue:
-    if (!dropNullPlaceholders_)
-      document_ += "null";
+    document_ += "null";
     break;
   case intValue:
     document_ += valueToString(value.asLargestInt());

src/test_lib_json/main.cpp

@@ -1497,17 +1497,6 @@ JSONTEST_FIXTURE(ValueTest, typeChecksThrowExceptions) {
 #endif
 }
 
-struct WriterTest : JsonTest::TestCase {};
-
-JSONTEST_FIXTURE(WriterTest, dropNullPlaceholders) {
-  Json::FastWriter writer;
-  Json::Value nullValue;
-  JSONTEST_ASSERT(writer.write(nullValue) == "null\n");
-
-  writer.dropNullPlaceholders();
-  JSONTEST_ASSERT(writer.write(nullValue) == "\n");
-}
-
 struct StreamWriterTest : JsonTest::TestCase {};
 
 JSONTEST_FIXTURE(StreamWriterTest, dropNullPlaceholders) {
@@ -1841,7 +1830,6 @@ int main(int argc, const char* argv[]) {
   JSONTEST_REGISTER_FIXTURE(runner, ValueTest, compareType);
   JSONTEST_REGISTER_FIXTURE(runner, ValueTest, typeChecksThrowExceptions);
 
-  JSONTEST_REGISTER_FIXTURE(runner, WriterTest, dropNullPlaceholders);
   JSONTEST_REGISTER_FIXTURE(runner, StreamWriterTest, dropNullPlaceholders);
 
   JSONTEST_REGISTER_FIXTURE(runner, ReaderTest, parseWithNoErrors);