Fix: No parameters for event.

libsolidity/Parser.cpp

@@ -222,12 +222,7 @@ ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(bool _isPublic, A
 		returnParameters = parseParameterList(permitEmptyParameterList);
 	}
 	else
-	{
-		// create an empty parameter list at a zero-length location
-		ASTNodeFactory nodeFactory(*this);
-		nodeFactory.setLocationEmpty();
-		returnParameters = nodeFactory.createNode<ParameterList>(vector<ASTPointer<VariableDeclaration>>());
-	}
+		returnParameters = createEmptyParameterList();
 	ASTPointer<Block> block = parseBlock();
 	nodeFactory.setEndPositionFromNode(block);
 	bool const c_isConstructor = (_contractName && *name == *_contractName);
@@ -285,12 +280,7 @@ ASTPointer<ModifierDefinition> Parser::parseModifierDefinition()
 	if (m_scanner->getCurrentToken() == Token::LPAREN)
 		parameters = parseParameterList();
 	else
-	{
-		// create an empty parameter list at a zero-length location
-		ASTNodeFactory nodeFactory(*this);
-		nodeFactory.setLocationEmpty();
-		parameters = nodeFactory.createNode<ParameterList>(vector<ASTPointer<VariableDeclaration>>());
-	}
+		parameters = createEmptyParameterList();
 	ASTPointer<Block> block = parseBlock();
 	nodeFactory.setEndPositionFromNode(block);
 	return nodeFactory.createNode<ModifierDefinition>(name, docstring, parameters, block);
@@ -308,6 +298,8 @@ ASTPointer<EventDefinition> Parser::parseEventDefinition()
 	ASTPointer<ParameterList> parameters;
 	if (m_scanner->getCurrentToken() == Token::LPAREN)
 		parameters = parseParameterList(true, true);
+	else
+		parameters = createEmptyParameterList();
 	nodeFactory.markEndPosition();
 	expectToken(Token::SEMICOLON);
 	return nodeFactory.createNode<EventDefinition>(name, docstring, parameters);
@@ -771,6 +763,13 @@ ASTPointer<ASTString> Parser::getLiteralAndAdvance()
 	return identifier;
 }
 
+ASTPointer<ParameterList> Parser::createEmptyParameterList()
+{
+	ASTNodeFactory nodeFactory(*this);
+	nodeFactory.setLocationEmpty();
+	return nodeFactory.createNode<ParameterList>(vector<ASTPointer<VariableDeclaration>>());
+}
+
 ParserError Parser::createParserError(string const& _description) const
 {
 	return ParserError() << errinfo_sourceLocation(Location(getPosition(), getPosition(), getSourceName()))

libsolidity/Parser.h

@@ -97,6 +97,9 @@ private:
 	ASTPointer<ASTString> getLiteralAndAdvance();
 	///@}
 
+	/// Creates an empty ParameterList at the current location (used if parameters can be omitted).
+	ASTPointer<ParameterList> createEmptyParameterList();
+
 	/// Creates a @ref ParserError exception and annotates it with the current position and the
 	/// given @a _description.
 	ParserError createParserError(std::string const& _description) const;

test/SolidityEndToEndTest.cpp

@@ -2016,6 +2016,25 @@ BOOST_AUTO_TEST_CASE(event)
 	}
 }
 
+BOOST_AUTO_TEST_CASE(event_no_arguments)
+{
+	char const* sourceCode = R"(
+		contract ClientReceipt {
+			event Deposit;
+			function deposit() {
+				Deposit();
+			}
+		}
+	)";
+	compileAndRun(sourceCode);
+	callContractFunction("deposit()");
+	BOOST_REQUIRE_EQUAL(m_logs.size(), 1);
+	BOOST_CHECK_EQUAL(m_logs[0].address, m_contractAddress);
+	BOOST_CHECK(m_logs[0].data.empty());
+	BOOST_REQUIRE_EQUAL(m_logs[0].topics.size(), 1);
+	BOOST_CHECK_EQUAL(m_logs[0].topics[0], dev::sha3(string("Deposit()")));
+}
+
 BOOST_AUTO_TEST_CASE(event_lots_of_data)
 {
 	char const* sourceCode = R"(