Merge pull request #480 from pah/feature/document-parseresult

GenericDocument: add implicit conversion to ParseResult

include/rapidjson/document.h

@@ -1986,6 +1986,17 @@ public:
     //! Get the position of last parsing error in input, 0 otherwise.
     size_t GetErrorOffset() const { return parseResult_.Offset(); }
 
+    //! Implicit conversion to get the last parse result
+    /*! \return \ref ParseResult of the last parse operation
+
+        \code
+          Document doc;
+          ParseResult ok = doc.Parse(json);
+          if (!ok)
+            printf( "JSON parse error: %s (%u)\n", GetParseError_En(ok.Code()), ok.Offset());
+        \endcode
+     */
+    operator ParseResult() const { return parseResult_; }
     //!@}
 
     //! Get the allocator of this document.

test/unittest/documenttest.cpp

@@ -28,6 +28,7 @@ void ParseCheck(DocumentType& doc) {
     typedef typename DocumentType::ValueType ValueType;
 
     EXPECT_FALSE(doc.HasParseError());
+    EXPECT_TRUE((ParseResult)doc);
 
     EXPECT_TRUE(doc.IsObject());
 
@@ -99,13 +100,18 @@ TEST(Document, UnchangedOnParseError) {
     Document doc;
     doc.SetArray().PushBack(0, doc.GetAllocator());
 
-    doc.Parse("{]");
+    ParseResult err = doc.Parse("{]");
     EXPECT_TRUE(doc.HasParseError());
+    EXPECT_EQ(err.Code(), doc.GetParseError());
+    EXPECT_EQ(err.Offset(), doc.GetErrorOffset());
     EXPECT_TRUE(doc.IsArray());
     EXPECT_EQ(doc.Size(), 1u);
 
-    doc.Parse("{}");
+    err = doc.Parse("{}");
     EXPECT_FALSE(doc.HasParseError());
+    EXPECT_FALSE(err.IsError());
+    EXPECT_EQ(err.Code(), doc.GetParseError());
+    EXPECT_EQ(err.Offset(), doc.GetErrorOffset());
     EXPECT_TRUE(doc.IsObject());
     EXPECT_EQ(doc.MemberCount(), 0u);
 }