diff --git a/ASTJsonConverter.cpp b/ASTJsonConverter.cpp
index be89de924..122b1c0d1 100644
--- a/ASTJsonConverter.cpp
+++ b/ASTJsonConverter.cpp
@@ -151,12 +151,6 @@ bool ASTJsonConverter::visit(Mapping const&)
 	return true;
 }
 
-bool ASTJsonConverter::visit(Statement const&)
-{
-	addJsonNode("Statement", {}, true);
-	return true;
-}
-
 bool ASTJsonConverter::visit(Block const&)
 {
 	addJsonNode("Block", {}, true);
@@ -169,11 +163,6 @@ bool ASTJsonConverter::visit(IfStatement const&)
 	return true;
 }
 
-bool ASTJsonConverter::visit(BreakableStatement const&)
-{
-	return true;
-}
-
 bool ASTJsonConverter::visit(WhileStatement const&)
 {
 	addJsonNode("WhileStatement", {}, true);
@@ -216,17 +205,6 @@ bool ASTJsonConverter::visit(ExpressionStatement const&)
 	return true;
 }
 
-bool ASTJsonConverter::visit(Expression const& _node)
-{
-	addJsonNode(
-		"Expression",
-		{ make_pair("type", getType(_node)),
-			make_pair("lvalue", boost::lexical_cast<std::string>(_node.isLValue())) },
-		true
-	);
-	return true;
-}
-
 bool ASTJsonConverter::visit(Assignment const& _node)
 {
 	addJsonNode("Assignment",
@@ -285,11 +263,6 @@ bool ASTJsonConverter::visit(IndexAccess const& _node)
 	return true;
 }
 
-bool ASTJsonConverter::visit(PrimaryExpression const&)
-{
-	return true;
-}
-
 bool ASTJsonConverter::visit(Identifier const& _node)
 {
 	addJsonNode("Identifier",
@@ -358,11 +331,6 @@ void ASTJsonConverter::endVisit(Mapping const&)
 {
 }
 
-void ASTJsonConverter::endVisit(Statement const&)
-{
-	goUp();
-}
-
 void ASTJsonConverter::endVisit(Block const&)
 {
 	goUp();
@@ -373,10 +341,6 @@ void ASTJsonConverter::endVisit(IfStatement const&)
 	goUp();
 }
 
-void ASTJsonConverter::endVisit(BreakableStatement const&)
-{
-}
-
 void ASTJsonConverter::endVisit(WhileStatement const&)
 {
 	goUp();
@@ -410,11 +374,6 @@ void ASTJsonConverter::endVisit(ExpressionStatement const&)
 	goUp();
 }
 
-void ASTJsonConverter::endVisit(Expression const&)
-{
-	goUp();
-}
-
 void ASTJsonConverter::endVisit(Assignment const&)
 {
 	goUp();
@@ -450,10 +409,6 @@ void ASTJsonConverter::endVisit(IndexAccess const&)
 	goUp();
 }
 
-void ASTJsonConverter::endVisit(PrimaryExpression const&)
-{
-}
-
 void ASTJsonConverter::endVisit(Identifier const&)
 {
 }
diff --git a/ASTJsonConverter.h b/ASTJsonConverter.h
index 56502ab3c..aaa54f7fd 100644
--- a/ASTJsonConverter.h
+++ b/ASTJsonConverter.h
@@ -56,10 +56,8 @@ public:
 	bool visit(ElementaryTypeName const& _node) override;
 	bool visit(UserDefinedTypeName const& _node) override;
 	bool visit(Mapping const& _node) override;
-	bool visit(Statement const& _node) override;
 	bool visit(Block const& _node) override;
 	bool visit(IfStatement const& _node) override;
-	bool visit(BreakableStatement const& _node) override;
 	bool visit(WhileStatement const& _node) override;
 	bool visit(ForStatement const& _node) override;
 	bool visit(Continue const& _node) override;
@@ -67,7 +65,6 @@ public:
 	bool visit(Return const& _node) override;
 	bool visit(VariableDeclarationStatement const& _node) override;
 	bool visit(ExpressionStatement const& _node) override;
-	bool visit(Expression const& _node) override;
 	bool visit(Assignment const& _node) override;
 	bool visit(UnaryOperation const& _node) override;
 	bool visit(BinaryOperation const& _node) override;
@@ -75,7 +72,6 @@ public:
 	bool visit(NewExpression const& _node) override;
 	bool visit(MemberAccess const& _node) override;
 	bool visit(IndexAccess const& _node) override;
-	bool visit(PrimaryExpression const& _node) override;
 	bool visit(Identifier const& _node) override;
 	bool visit(ElementaryTypeNameExpression const& _node) override;
 	bool visit(Literal const& _node) override;
@@ -90,10 +86,8 @@ public:
 	void endVisit(ElementaryTypeName const&) override;
 	void endVisit(UserDefinedTypeName const&) override;
 	void endVisit(Mapping const&) override;
-	void endVisit(Statement const&) override;
 	void endVisit(Block const&) override;
 	void endVisit(IfStatement const&) override;
-	void endVisit(BreakableStatement const&) override;
 	void endVisit(WhileStatement const&) override;
 	void endVisit(ForStatement const&) override;
 	void endVisit(Continue const&) override;
@@ -101,7 +95,6 @@ public:
 	void endVisit(Return const&) override;
 	void endVisit(VariableDeclarationStatement const&) override;
 	void endVisit(ExpressionStatement const&) override;
-	void endVisit(Expression const&) override;
 	void endVisit(Assignment const&) override;
 	void endVisit(UnaryOperation const&) override;
 	void endVisit(BinaryOperation const&) override;
@@ -109,7 +102,6 @@ public:
 	void endVisit(NewExpression const&) override;
 	void endVisit(MemberAccess const&) override;
 	void endVisit(IndexAccess const&) override;
-	void endVisit(PrimaryExpression const&) override;
 	void endVisit(Identifier const&) override;
 	void endVisit(ElementaryTypeNameExpression const&) override;
 	void endVisit(Literal const&) override;
diff --git a/ASTPrinter.cpp b/ASTPrinter.cpp
index d0b27b317..713059d38 100644
--- a/ASTPrinter.cpp
+++ b/ASTPrinter.cpp
@@ -162,13 +162,6 @@ bool ASTPrinter::visit(ArrayTypeName const& _node)
 	return goDeeper();
 }
 
-bool ASTPrinter::visit(Statement const& _node)
-{
-	writeLine("Statement");
-	printSourcePart(_node);
-	return goDeeper();
-}
-
 bool ASTPrinter::visit(Block const& _node)
 {
 	writeLine("Block");
@@ -190,13 +183,6 @@ bool ASTPrinter::visit(IfStatement const& _node)
 	return goDeeper();
 }
 
-bool ASTPrinter::visit(BreakableStatement const& _node)
-{
-	writeLine("BreakableStatement");
-	printSourcePart(_node);
-	return goDeeper();
-}
-
 bool ASTPrinter::visit(WhileStatement const& _node)
 {
 	writeLine("WhileStatement");
@@ -246,14 +232,6 @@ bool ASTPrinter::visit(ExpressionStatement const& _node)
 	return goDeeper();
 }
 
-bool ASTPrinter::visit(Expression const& _node)
-{
-	writeLine("Expression");
-	printType(_node);
-	printSourcePart(_node);
-	return goDeeper();
-}
-
 bool ASTPrinter::visit(Assignment const& _node)
 {
 	writeLine(string("Assignment using operator ") + Token::toString(_node.getAssignmentOperator()));
@@ -311,14 +289,6 @@ bool ASTPrinter::visit(IndexAccess const& _node)
 	return goDeeper();
 }
 
-bool ASTPrinter::visit(PrimaryExpression const& _node)
-{
-	writeLine("PrimaryExpression");
-	printType(_node);
-	printSourcePart(_node);
-	return goDeeper();
-}
-
 bool ASTPrinter::visit(Identifier const& _node)
 {
 	writeLine(string("Identifier ") + _node.getName());
@@ -431,11 +401,6 @@ void ASTPrinter::endVisit(ArrayTypeName const&)
 	m_indentation--;
 }
 
-void ASTPrinter::endVisit(Statement const&)
-{
-	m_indentation--;
-}
-
 void ASTPrinter::endVisit(Block const&)
 {
 	m_indentation--;
@@ -451,11 +416,6 @@ void ASTPrinter::endVisit(IfStatement const&)
 	m_indentation--;
 }
 
-void ASTPrinter::endVisit(BreakableStatement const&)
-{
-	m_indentation--;
-}
-
 void ASTPrinter::endVisit(WhileStatement const&)
 {
 	m_indentation--;
@@ -491,11 +451,6 @@ void ASTPrinter::endVisit(ExpressionStatement const&)
 	m_indentation--;
 }
 
-void ASTPrinter::endVisit(Expression const&)
-{
-	m_indentation--;
-}
-
 void ASTPrinter::endVisit(Assignment const&)
 {
 	m_indentation--;
@@ -531,11 +486,6 @@ void ASTPrinter::endVisit(IndexAccess const&)
 	m_indentation--;
 }
 
-void ASTPrinter::endVisit(PrimaryExpression const&)
-{
-	m_indentation--;
-}
-
 void ASTPrinter::endVisit(Identifier const&)
 {
 	m_indentation--;
diff --git a/ASTPrinter.h b/ASTPrinter.h
index a1797383c..9494bf8cb 100644
--- a/ASTPrinter.h
+++ b/ASTPrinter.h
@@ -59,11 +59,9 @@ public:
 	bool visit(UserDefinedTypeName const& _node) override;
 	bool visit(Mapping const& _node) override;
 	bool visit(ArrayTypeName const& _node) override;
-	bool visit(Statement const& _node) override;
 	bool visit(Block const& _node) override;
 	bool visit(PlaceholderStatement const& _node) override;
 	bool visit(IfStatement const& _node) override;
-	bool visit(BreakableStatement const& _node) override;
 	bool visit(WhileStatement const& _node) override;
 	bool visit(ForStatement const& _node) override;
 	bool visit(Continue const& _node) override;
@@ -71,7 +69,6 @@ public:
 	bool visit(Return const& _node) override;
 	bool visit(VariableDeclarationStatement const& _node) override;
 	bool visit(ExpressionStatement const& _node) override;
-	bool visit(Expression const& _node) override;
 	bool visit(Assignment const& _node) override;
 	bool visit(UnaryOperation const& _node) override;
 	bool visit(BinaryOperation const& _node) override;
@@ -79,7 +76,6 @@ public:
 	bool visit(NewExpression const& _node) override;
 	bool visit(MemberAccess const& _node) override;
 	bool visit(IndexAccess const& _node) override;
-	bool visit(PrimaryExpression const& _node) override;
 	bool visit(Identifier const& _node) override;
 	bool visit(ElementaryTypeNameExpression const& _node) override;
 	bool visit(Literal const& _node) override;
@@ -101,11 +97,9 @@ public:
 	void endVisit(UserDefinedTypeName const&) override;
 	void endVisit(Mapping const&) override;
 	void endVisit(ArrayTypeName const&) override;
-	void endVisit(Statement const&) override;
 	void endVisit(Block const&) override;
 	void endVisit(PlaceholderStatement const&) override;
 	void endVisit(IfStatement const&) override;
-	void endVisit(BreakableStatement const&) override;
 	void endVisit(WhileStatement const&) override;
 	void endVisit(ForStatement const&) override;
 	void endVisit(Continue const&) override;
@@ -113,7 +107,6 @@ public:
 	void endVisit(Return const&) override;
 	void endVisit(VariableDeclarationStatement const&) override;
 	void endVisit(ExpressionStatement const&) override;
-	void endVisit(Expression const&) override;
 	void endVisit(Assignment const&) override;
 	void endVisit(UnaryOperation const&) override;
 	void endVisit(BinaryOperation const&) override;
@@ -121,7 +114,6 @@ public:
 	void endVisit(NewExpression const&) override;
 	void endVisit(MemberAccess const&) override;
 	void endVisit(IndexAccess const&) override;
-	void endVisit(PrimaryExpression const&) override;
 	void endVisit(Identifier const&) override;
 	void endVisit(ElementaryTypeNameExpression const&) override;
 	void endVisit(Literal const&) override;
diff --git a/ASTVisitor.h b/ASTVisitor.h
index 3eeb9c456..2028579c7 100644
--- a/ASTVisitor.h
+++ b/ASTVisitor.h
@@ -41,7 +41,6 @@ namespace solidity
 class ASTVisitor
 {
 public:
-	virtual bool visit(ASTNode&) { return true; }
 	virtual bool visit(SourceUnit&) { return true; }
 	virtual bool visit(ImportDirective&) { return true; }
 	virtual bool visit(ContractDefinition&) { return true; }
@@ -60,11 +59,9 @@ public:
 	virtual bool visit(UserDefinedTypeName&) { return true; }
 	virtual bool visit(Mapping&) { return true; }
 	virtual bool visit(ArrayTypeName&) { return true; }
-	virtual bool visit(Statement&) { return true; }
 	virtual bool visit(Block&) { return true; }
 	virtual bool visit(PlaceholderStatement&) { return true; }
 	virtual bool visit(IfStatement&) { return true; }
-	virtual bool visit(BreakableStatement&) { return true; }
 	virtual bool visit(WhileStatement&) { return true; }
 	virtual bool visit(ForStatement&) { return true; }
 	virtual bool visit(Continue&) { return true; }
@@ -72,7 +69,6 @@ public:
 	virtual bool visit(Return&) { return true; }
 	virtual bool visit(VariableDeclarationStatement&) { return true; }
 	virtual bool visit(ExpressionStatement&) { return true; }
-	virtual bool visit(Expression&) { return true; }
 	virtual bool visit(Assignment&) { return true; }
 	virtual bool visit(UnaryOperation&) { return true; }
 	virtual bool visit(BinaryOperation&) { return true; }
@@ -80,12 +76,10 @@ public:
 	virtual bool visit(NewExpression&) { return true; }
 	virtual bool visit(MemberAccess&) { return true; }
 	virtual bool visit(IndexAccess&) { return true; }
-	virtual bool visit(PrimaryExpression&) { return true; }
 	virtual bool visit(Identifier&) { return true; }
 	virtual bool visit(ElementaryTypeNameExpression&) { return true; }
 	virtual bool visit(Literal&) { return true; }
 
-	virtual void endVisit(ASTNode&) { }
 	virtual void endVisit(SourceUnit&) { }
 	virtual void endVisit(ImportDirective&) { }
 	virtual void endVisit(ContractDefinition&) { }
@@ -104,11 +98,9 @@ public:
 	virtual void endVisit(UserDefinedTypeName&) { }
 	virtual void endVisit(Mapping&) { }
 	virtual void endVisit(ArrayTypeName&) { }
-	virtual void endVisit(Statement&) { }
 	virtual void endVisit(Block&) { }
 	virtual void endVisit(PlaceholderStatement&) { }
 	virtual void endVisit(IfStatement&) { }
-	virtual void endVisit(BreakableStatement&) { }
 	virtual void endVisit(WhileStatement&) { }
 	virtual void endVisit(ForStatement&) { }
 	virtual void endVisit(Continue&) { }
@@ -116,7 +108,6 @@ public:
 	virtual void endVisit(Return&) { }
 	virtual void endVisit(VariableDeclarationStatement&) { }
 	virtual void endVisit(ExpressionStatement&) { }
-	virtual void endVisit(Expression&) { }
 	virtual void endVisit(Assignment&) { }
 	virtual void endVisit(UnaryOperation&) { }
 	virtual void endVisit(BinaryOperation&) { }
@@ -124,7 +115,6 @@ public:
 	virtual void endVisit(NewExpression&) { }
 	virtual void endVisit(MemberAccess&) { }
 	virtual void endVisit(IndexAccess&) { }
-	virtual void endVisit(PrimaryExpression&) { }
 	virtual void endVisit(Identifier&) { }
 	virtual void endVisit(ElementaryTypeNameExpression&) { }
 	virtual void endVisit(Literal&) { }
@@ -133,7 +123,6 @@ public:
 class ASTConstVisitor
 {
 public:
-	virtual bool visit(ASTNode const&) { return true; }
 	virtual bool visit(SourceUnit const&) { return true; }
 	virtual bool visit(ImportDirective const&) { return true; }
 	virtual bool visit(ContractDefinition const&) { return true; }
@@ -152,11 +141,9 @@ public:
 	virtual bool visit(UserDefinedTypeName const&) { return true; }
 	virtual bool visit(Mapping const&) { return true; }
 	virtual bool visit(ArrayTypeName const&) { return true; }
-	virtual bool visit(Statement const&) { return true; }
 	virtual bool visit(Block const&) { return true; }
 	virtual bool visit(PlaceholderStatement const&) { return true; }
 	virtual bool visit(IfStatement const&) { return true; }
-	virtual bool visit(BreakableStatement const&) { return true; }
 	virtual bool visit(WhileStatement const&) { return true; }
 	virtual bool visit(ForStatement const&) { return true; }
 	virtual bool visit(Continue const&) { return true; }
@@ -164,7 +151,6 @@ public:
 	virtual bool visit(Return const&) { return true; }
 	virtual bool visit(VariableDeclarationStatement const&) { return true; }
 	virtual bool visit(ExpressionStatement const&) { return true; }
-	virtual bool visit(Expression const&) { return true; }
 	virtual bool visit(Assignment const&) { return true; }
 	virtual bool visit(UnaryOperation const&) { return true; }
 	virtual bool visit(BinaryOperation const&) { return true; }
@@ -172,12 +158,10 @@ public:
 	virtual bool visit(NewExpression const&) { return true; }
 	virtual bool visit(MemberAccess const&) { return true; }
 	virtual bool visit(IndexAccess const&) { return true; }
-	virtual bool visit(PrimaryExpression const&) { return true; }
 	virtual bool visit(Identifier const&) { return true; }
 	virtual bool visit(ElementaryTypeNameExpression const&) { return true; }
 	virtual bool visit(Literal const&) { return true; }
 
-	virtual void endVisit(ASTNode const&) { }
 	virtual void endVisit(SourceUnit const&) { }
 	virtual void endVisit(ImportDirective const&) { }
 	virtual void endVisit(ContractDefinition const&) { }
@@ -196,11 +180,9 @@ public:
 	virtual void endVisit(UserDefinedTypeName const&) { }
 	virtual void endVisit(Mapping const&) { }
 	virtual void endVisit(ArrayTypeName const&) { }
-	virtual void endVisit(Statement const&) { }
 	virtual void endVisit(Block const&) { }
 	virtual void endVisit(PlaceholderStatement const&) { }
 	virtual void endVisit(IfStatement const&) { }
-	virtual void endVisit(BreakableStatement const&) { }
 	virtual void endVisit(WhileStatement const&) { }
 	virtual void endVisit(ForStatement const&) { }
 	virtual void endVisit(Continue const&) { }
@@ -208,7 +190,6 @@ public:
 	virtual void endVisit(Return const&) { }
 	virtual void endVisit(VariableDeclarationStatement const&) { }
 	virtual void endVisit(ExpressionStatement const&) { }
-	virtual void endVisit(Expression const&) { }
 	virtual void endVisit(Assignment const&) { }
 	virtual void endVisit(UnaryOperation const&) { }
 	virtual void endVisit(BinaryOperation const&) { }
@@ -216,7 +197,6 @@ public:
 	virtual void endVisit(NewExpression const&) { }
 	virtual void endVisit(MemberAccess const&) { }
 	virtual void endVisit(IndexAccess const&) { }
-	virtual void endVisit(PrimaryExpression const&) { }
 	virtual void endVisit(Identifier const&) { }
 	virtual void endVisit(ElementaryTypeNameExpression const&) { }
 	virtual void endVisit(Literal const&) { }