diff --git a/Makefile b/Makefile
index eba6fef..f26cd92 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,13 @@ rebuild: clean all
 
 xmltest: xmltest.cpp libtinyxml2.a
 
+effc:
+	gcc -Werror -Wall -Wextra -Wshadow -Wpedantic -Wformat-nonliteral \
+        -Wformat-security -Wswitch-default -Wuninitialized -Wundef \
+        -Wpointer-arith -Woverloaded-virtual -Wctor-dtor-privacy \
+        -Wnon-virtual-dtor -Woverloaded-virtual -Wsign-promo \
+        -Wno-unused-parameter -Weffc++ xmltest.cpp tinyxml2.cpp -o xmltest
+
 clean:
 	$(RM) *.o xmltest libtinyxml2.a
 	
diff --git a/contrib/html5-printer.cpp b/contrib/html5-printer.cpp
index 7728b69..e9a423d 100644
--- a/contrib/html5-printer.cpp
+++ b/contrib/html5-printer.cpp
@@ -40,7 +40,7 @@ distribution.
 */
 
 
-#include <tinyxml2.h>
+#include "../tinyxml2.h"
 #include <iostream>
 
 #if defined (_MSC_VER)
diff --git a/tinyxml2.cpp b/tinyxml2.cpp
index 3ec4f6d..5de92b5 100755
--- a/tinyxml2.cpp
+++ b/tinyxml2.cpp
@@ -742,6 +742,7 @@ bool XMLDocument::Accept( XMLVisitor* visitor ) const
 XMLNode::XMLNode( XMLDocument* doc ) :
     _document( doc ),
     _parent( 0 ),
+    _value(),
     _parseLineNum( 0 ),
     _firstChild( 0 ), _lastChild( 0 ),
     _prev( 0 ), _next( 0 ),
@@ -2001,9 +2002,16 @@ XMLDocument::XMLDocument( bool processEntities, Whitespace whitespaceMode ) :
     _processEntities( processEntities ),
     _errorID(XML_SUCCESS),
     _whitespaceMode( whitespaceMode ),
+    _errorStr1(),
+    _errorStr2(),
     _errorLineNum( 0 ),
     _charBuffer( 0 ),
-    _parseCurLineNum( 0 )
+    _parseCurLineNum( 0 ),
+    _unlinked(),
+    _elementPool(),
+    _attributePool(),
+    _textPool(),
+    _commentPool()
 {
     // avoid VC++ C4355 warning about 'this' in initializer list (C4355 is off by default in VS2012+)
     _document = this;
@@ -2363,12 +2371,14 @@ void XMLDocument::Parse()
 
 XMLPrinter::XMLPrinter( FILE* file, bool compact, int depth ) :
     _elementJustOpened( false ),
+    _stack(),
     _firstElement( true ),
     _fp( file ),
     _depth( depth ),
     _textDepth( -1 ),
     _processEntities( true ),
-    _compactMode( compact )
+    _compactMode( compact ),
+    _buffer()
 {
     for( int i=0; i<ENTITY_RANGE; ++i ) {
         _entityFlag[i] = false;
diff --git a/tinyxml2.h b/tinyxml2.h
index c9850f6..2958b46 100755
--- a/tinyxml2.h
+++ b/tinyxml2.h
@@ -192,10 +192,11 @@ template <class T, int INITIAL_SIZE>
 class DynArray
 {
 public:
-    DynArray() {
-        _mem = _pool;
-        _allocated = INITIAL_SIZE;
-        _size = 0;
+    DynArray() :
+        _mem( _pool ),
+        _allocated( INITIAL_SIZE ),
+        _size( 0 )
+    {
     }
 
     ~DynArray() {
@@ -333,7 +334,7 @@ template< int ITEM_SIZE >
 class MemPoolT : public MemPool
 {
 public:
-    MemPoolT() : _root(0), _currentAllocs(0), _nAllocs(0), _maxAllocs(0), _nUntracked(0)	{}
+    MemPoolT() : _blockPtrs(), _root(0), _currentAllocs(0), _nAllocs(0), _maxAllocs(0), _nUntracked(0)	{}
     ~MemPoolT() {
         Clear();
     }
@@ -1211,7 +1212,7 @@ public:
 private:
     enum { BUF_SIZE = 200 };
 
-    XMLAttribute() : _parseLineNum( 0 ), _next( 0 ), _memPool( 0 ) {}
+    XMLAttribute() : _name(), _value(),_parseLineNum( 0 ), _next( 0 ), _memPool( 0 ) {}
     virtual ~XMLAttribute()	{}
 
     XMLAttribute( const XMLAttribute& );	// not supported
@@ -1953,16 +1954,13 @@ class TINYXML2_LIB XMLHandle
 {
 public:
     /// Create a handle from any node (at any depth of the tree.) This can be a null pointer.
-    XMLHandle( XMLNode* node )												{
-        _node = node;
+    XMLHandle( XMLNode* node ) : _node( node ) {
     }
     /// Create a handle from a node.
-    XMLHandle( XMLNode& node )												{
-        _node = &node;
+    XMLHandle( XMLNode& node ) : _node( &node ) {
     }
     /// Copy constructor
-    XMLHandle( const XMLHandle& ref )										{
-        _node = ref._node;
+    XMLHandle( const XMLHandle& ref ) : _node( ref._node ) {
     }
     /// Assignment
     XMLHandle& operator=( const XMLHandle& ref )							{
@@ -2036,14 +2034,11 @@ private:
 class TINYXML2_LIB XMLConstHandle
 {
 public:
-    XMLConstHandle( const XMLNode* node )											{
-        _node = node;
+    XMLConstHandle( const XMLNode* node ) : _node( node ) {
     }
-    XMLConstHandle( const XMLNode& node )											{
-        _node = &node;
+    XMLConstHandle( const XMLNode& node ) : _node( &node ) {
     }
-    XMLConstHandle( const XMLConstHandle& ref )										{
-        _node = ref._node;
+    XMLConstHandle( const XMLConstHandle& ref ) : _node( ref._node ) {
     }
 
     XMLConstHandle& operator=( const XMLConstHandle& ref )							{
@@ -2258,6 +2253,10 @@ private:
     bool _restrictedEntityFlag[ENTITY_RANGE];
 
     DynArray< char, 20 > _buffer;
+
+    // Prohibit cloning, intentionally not implemented
+    XMLPrinter( const XMLPrinter& );
+    XMLPrinter& operator=( const XMLPrinter& );
 };
 
 
diff --git a/xmltest.cpp b/xmltest.cpp
index a297722..91494ec 100644
--- a/xmltest.cpp
+++ b/xmltest.cpp
@@ -1035,8 +1035,9 @@ int main( int argc, const char ** argv )
 		if ( textfile )
 		{
 			XMLPrinter streamer( textfile );
-			psg->Accept( &streamer );
+			bool acceptResult = psg->Accept( &streamer );
 			fclose( textfile );
+			XMLTest( "Entity transformation: Accept", true, acceptResult );
 		}
 
 		textfile = fopen( textFilePath, "r" );
@@ -1332,7 +1333,8 @@ int main( int argc, const char ** argv )
 			XMLTest( "Parse before deep cloning sub element", false, doc.Error() );
 
 			const XMLElement* subElement = doc.FirstChildElement("root")->FirstChildElement("child2");
-			subElement->Accept(&printer1);
+			bool acceptResult = subElement->Accept(&printer1);
+			XMLTest( "Accept before deep cloning", true, acceptResult );
 
 			XMLNode* clonedSubElement = subElement->DeepClone(&doc2);
 			doc2.InsertFirstChild(clonedSubElement);
@@ -1648,7 +1650,8 @@ int main( int argc, const char ** argv )
 		XMLElement* ele = doc.FirstChildElement( "parent")->FirstChildElement( "child");
 
 		XMLPrinter printer;
-		ele->Accept( &printer );
+		bool acceptResult = ele->Accept( &printer );
+		XMLTest( "Accept of sub-element", true, acceptResult );
 		XMLTest( "Printing of sub-element", "<child>abc</child>\n", printer.CStr(), false );
 	}
 
@@ -1730,7 +1733,8 @@ int main( int argc, const char ** argv )
 		XMLElement* two = doc.RootElement()->FirstChildElement("two");
 		two->InsertFirstChild(subtree);
 		XMLPrinter printer1(0, true);
-		doc.Accept(&printer1);
+		bool acceptResult = doc.Accept(&printer1);
+		XMLTest("Move node from within <one> to <two> - Accept()", true, acceptResult);
 		XMLTest("Move node from within <one> to <two>", xmlInsideTwo, printer1.CStr());
 
 		doc.Parse(xml);
@@ -1739,7 +1743,8 @@ int main( int argc, const char ** argv )
 		two = doc.RootElement()->FirstChildElement("two");
 		doc.RootElement()->InsertAfterChild(two, subtree);
 		XMLPrinter printer2(0, true);
-		doc.Accept(&printer2);
+		acceptResult = doc.Accept(&printer2);
+		XMLTest("Move node from within <one> after <two> - Accept()", true, acceptResult);
 		XMLTest("Move node from within <one> after <two>", xmlAfterTwo, printer2.CStr(), false);
 
 		doc.Parse(xml);
@@ -1748,7 +1753,8 @@ int main( int argc, const char ** argv )
 		subtree = one->FirstChildElement("subtree");
 		doc.RootElement()->InsertAfterChild(one, subtree);
 		XMLPrinter printer3(0, true);
-		doc.Accept(&printer3);
+		acceptResult = doc.Accept(&printer3);
+		XMLTest("Move node from within <one> after <one> - Accept()", true, acceptResult);
 		XMLTest("Move node from within <one> after <one>", xmlAfterOne, printer3.CStr(), false);
 
 		doc.Parse(xml);
@@ -1757,7 +1763,8 @@ int main( int argc, const char ** argv )
 		two = doc.RootElement()->FirstChildElement("two");
 		doc.RootElement()->InsertEndChild(subtree);
 		XMLPrinter printer4(0, true);
-		doc.Accept(&printer4);
+		acceptResult = doc.Accept(&printer4);
+		XMLTest("Move node from within <one> after <two> - Accept()", true, acceptResult);
 		XMLTest("Move node from within <one> after <two>", xmlAfterTwo, printer4.CStr(), false);
 	}
 
@@ -1881,7 +1888,8 @@ int main( int argc, const char ** argv )
 		XMLDocument doc;
 		XMLElement* newElement = doc.NewElement( "printme" );
 		XMLPrinter printer;
-		newElement->Accept( &printer );
+		bool acceptResult = newElement->Accept( &printer );
+		XMLTest( "printme - Accept()", true, acceptResult );
 		// Delete the node to avoid possible memory leak report in debug output
 		doc.DeleteNode( newElement );
 	}
@@ -2015,22 +2023,33 @@ int main( int argc, const char ** argv )
 		XMLElement* playlist = doc.FirstChildElement("playlist");
 		XMLTest("Crash bug parsing", true, playlist != 0);
 
-		tinyxml2::XMLElement* entry = playlist->FirstChildElement("entry");
-		XMLTest("Crash bug parsing", true, entry != 0);
-		while (entry) {
-			tinyxml2::XMLElement* todelete = entry;
-			entry = entry->NextSiblingElement("entry");
-			playlist->DeleteChild(todelete);
-		};
-		tinyxml2::XMLElement* blank = playlist->FirstChildElement("blank");
-		while (blank) {
-			tinyxml2::XMLElement* todelete = blank;
-			blank = blank->NextSiblingElement("blank");
-			playlist->DeleteChild(todelete);
-		};
+		{
+			const char* elementName = "entry";
+			XMLElement* entry = playlist->FirstChildElement(elementName);
+			XMLTest("Crash bug parsing", true, entry != 0);
+			while (entry) {
+				XMLElement* todelete = entry;
+				entry = entry->NextSiblingElement(elementName);
+				playlist->DeleteChild(todelete);
+			}
+			entry = playlist->FirstChildElement(elementName);
+			XMLTest("Crash bug parsing", true, entry == 0);
+		}
+		{
+			const char* elementName = "blank";
+			XMLElement* blank = playlist->FirstChildElement(elementName);
+			XMLTest("Crash bug parsing", true, blank != 0);
+			while (blank) {
+				XMLElement* todelete = blank;
+				blank = blank->NextSiblingElement(elementName);
+				playlist->DeleteChild(todelete);
+			}
+			XMLTest("Crash bug parsing", true, blank == 0);
+		}
 
 		tinyxml2::XMLPrinter printer;
-		playlist->Accept(&printer);
+		const bool acceptResult = playlist->Accept(&printer);
+		XMLTest("Crash bug parsing - Accept()", true, acceptResult);
 		printf("%s\n", printer.CStr());
 
 		// No test; it only need to not crash. 
@@ -2046,6 +2065,8 @@ int main( int argc, const char ** argv )
     {
         struct TestUtil: XMLVisitor
         {
+            TestUtil() : str() {}
+
             void TestParseError(const char *testString, const char *docStr, XMLError expected_error, int expectedLine)
             {
                 XMLDocument doc;
@@ -2119,7 +2140,8 @@ int main( int argc, const char ** argv )
             void TestDocLines(const char *testString, XMLDocument &doc, const char *expectedLines)
             {
                 str.Clear();
-                doc.Accept(this);
+                const bool acceptResult = doc.Accept(this);
+                XMLTest(testString, true, acceptResult);
                 str.Push(0);
                 XMLTest(testString, expectedLines, str.Mem());
             }