Fix #905 unable to set writeFlags for PrettyWriter

include/rapidjson/prettywriter.h

@@ -47,7 +47,7 @@ enum PrettyFormatOptions {
 template<typename OutputStream, typename SourceEncoding = UTF8<>, typename TargetEncoding = UTF8<>, typename StackAllocator = CrtAllocator, unsigned writeFlags = kWriteDefaultFlags>
 class PrettyWriter : public Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator, writeFlags> {
 public:
-    typedef Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator> Base;
+    typedef Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator, writeFlags> Base;
     typedef typename Base::Ch Ch;
 
     //! Constructor

test/unittest/prettywritertest.cpp

@@ -258,6 +258,49 @@ TEST(PrettyWriter, InvalidEventSequence) {
     }
 }
 
+TEST(PrettyWriter, NaN) {
+    double nan = std::numeric_limits<double>::quiet_NaN();
+
+    EXPECT_TRUE(internal::Double(nan).IsNan());
+    StringBuffer buffer;
+    {
+        PrettyWriter<StringBuffer> writer(buffer);
+        EXPECT_FALSE(writer.Double(nan));
+    }
+    {
+        PrettyWriter<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(nan));
+        EXPECT_STREQ("NaN", buffer.GetString());
+    }
+    GenericStringBuffer<UTF16<> > buffer2;
+    PrettyWriter<GenericStringBuffer<UTF16<> > > writer2(buffer2);
+    EXPECT_FALSE(writer2.Double(nan));
+}
+
+TEST(PrettyWriter, Inf) {
+    double inf = std::numeric_limits<double>::infinity();
+
+    EXPECT_TRUE(internal::Double(inf).IsInf());
+    StringBuffer buffer;
+    {
+        PrettyWriter<StringBuffer> writer(buffer);
+        EXPECT_FALSE(writer.Double(inf));
+    }
+    {
+        PrettyWriter<StringBuffer> writer(buffer);
+        EXPECT_FALSE(writer.Double(-inf));
+    }
+    {
+        PrettyWriter<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(inf));
+    }
+    {
+        PrettyWriter<StringBuffer, UTF8<>, UTF8<>, CrtAllocator, kWriteNanAndInfFlag> writer(buffer);
+        EXPECT_TRUE(writer.Double(-inf));
+    }
+    EXPECT_STREQ("Infinity-Infinity", buffer.GetString());
+}
+
 TEST(PrettyWriter, Issue_889) {
     char buf[100] = "Hello";