Implemented ASTJson import export for UserDefinedValueType

Also added a test.

Author: hrkrshnn

libsolidity/ast/ASTJsonConverter.cpp

@@ -353,6 +353,20 @@ bool ASTJsonConverter::visit(EnumValue const& _node)
 	return false;
 }
 
+bool ASTJsonConverter::visit(UserDefinedValueType const& _node)
+{
+	solAssert(_node.typeName(), "");
+	std::vector<pair<string, Json::Value>> attributes = {
+		make_pair("name", _node.name()),
+		make_pair("nameLocation", sourceLocationToString(_node.nameLocation())),
+		make_pair("typeName", toJson(*_node.typeName()))
+	};
+
+	setJsonNode(_node, "UserDefinedValueTypeDefinition", std::move(attributes));
+
+	return false;
+}
+
 bool ASTJsonConverter::visit(ParameterList const& _node)
 {
 	setJsonNode(_node, "ParameterList", {

libsolidity/ast/ASTJsonConverter.h

@@ -81,6 +81,7 @@ class ASTJsonConverter: public ASTConstVisitor
 	bool visit(StructDefinition const& _node) override;
 	bool visit(EnumDefinition const& _node) override;
 	bool visit(EnumValue const& _node) override;
+	bool visit(UserDefinedValueType const& _node) override;
 	bool visit(ParameterList const& _node) override;
 	bool visit(OverrideSpecifier const& _node) override;
 	bool visit(FunctionDefinition const& _node) override;

libsolidity/ast/ASTJsonImporter.cpp

@@ -133,6 +133,8 @@ ASTPointer<ASTNode> ASTJsonImporter::convertJsonToASTNode(Json::Value const& _js
 		return createEnumDefinition(_json);
 	if (nodeType == "EnumValue")
 		return createEnumValue(_json);
+	if (nodeType == "UserDefinedValueTypeDefinition")
+		return createUserDefinedValueTypeDefinition(_json);
 	if (nodeType == "ParameterList")
 		return createParameterList(_json);
 	if (nodeType == "OverrideSpecifier")
@@ -387,6 +389,16 @@ ASTPointer<EnumValue> ASTJsonImporter::createEnumValue(Json::Value const& _node)
 	);
 }
 
+ASTPointer<UserDefinedValueType> ASTJsonImporter::createUserDefinedValueTypeDefinition(Json::Value const& _node)
+{
+	return createASTNode<UserDefinedValueType>(
+		_node,
+		memberAsASTString(_node, "name"),
+		createNameSourceLocation(_node),
+		convertJsonToASTNode<TypeName>(member(_node, "typeName"))
+	);
+}
+
 ASTPointer<ParameterList> ASTJsonImporter::createParameterList(Json::Value const&  _node)
 {
 	std::vector<ASTPointer<VariableDeclaration>> parameters;

libsolidity/ast/ASTJsonImporter.h

@@ -81,6 +81,7 @@ class ASTJsonImporter
 	ASTPointer<ASTNode> createStructDefinition(Json::Value const& _node);
 	ASTPointer<EnumDefinition> createEnumDefinition(Json::Value const& _node);
 	ASTPointer<EnumValue> createEnumValue(Json::Value const& _node);
+	ASTPointer<UserDefinedValueType> createUserDefinedValueTypeDefinition(Json::Value const& _node);
 	ASTPointer<ParameterList> createParameterList(Json::Value const& _node);
 	ASTPointer<OverrideSpecifier> createOverrideSpecifier(Json::Value const& _node);
 	ASTPointer<FunctionDefinition> createFunctionDefinition(Json::Value const& _node);