- added tests to test empty comment

- fixed skipSingleLineComment
- some style fixes

test/libsolidity/SolidityNatspecJSON.cpp

@@ -527,6 +527,22 @@ BOOST_AUTO_TEST_CASE(natspec_multiline_notice_without_tag)
 	checkNatspec(sourceCode, natspec, true);
 }
 
+BOOST_AUTO_TEST_CASE(empty_comment)
+{
+	char const* sourceCode = R"(
+		//
+		contract test
+		{}
+	)";
+	char const* natspec = R"ABCDEF(
+	{
+	   "methods" : {}
+	}
+	)ABCDEF";
+
+	checkNatspec(sourceCode, natspec, true);
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }

test/libsolidity/SolidityParser.cpp

@@ -914,6 +914,16 @@ BOOST_AUTO_TEST_CASE(location_specifiers_with_var)
 	BOOST_CHECK_THROW(parseText(text), ParserError);
 }
 
+BOOST_AUTO_TEST_CASE(empty_comment)
+{
+	char const* text = R"(
+		//
+		contract test
+		{}
+	)";
+	BOOST_CHECK_NO_THROW(parseText(text));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }

test/libsolidity/SolidityScanner.cpp

@@ -281,6 +281,16 @@ BOOST_AUTO_TEST_CASE(time_after)
 	BOOST_CHECK_EQUAL(scanner.currentToken(), Token::After);
 }
 
+BOOST_AUTO_TEST_CASE(empty_comment)
+{
+	Scanner scanner(CharStream("//\ncontract{}"));
+	BOOST_CHECK_EQUAL(scanner.currentCommentLiteral(), "");
+	BOOST_CHECK_EQUAL(scanner.currentToken(), Token::Contract);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::LBrace);
+	BOOST_CHECK_EQUAL(scanner.next(), Token::RBrace);
+
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }