Adds line numbers to parser errors in isoltest.

test/libsolidity/SemanticTest.cpp

@@ -43,7 +43,8 @@ SemanticTest::SemanticTest(string const& _filename, string const& _ipcPath, lang
 	soltestAssert(file, "Cannot open test contract: \"" + _filename + "\".");
 	file.exceptions(ios::badbit);
 
-	m_source = parseSourceAndSettings(file);
+	std::tie(m_source, m_lineOffset) = parseSourceAndSettingsWithLineNumbers(file);
+
 	if (m_settings.count("compileViaYul"))
 	{
 		if (m_settings["compileViaYul"] == "also")
@@ -163,7 +164,7 @@ void SemanticTest::printUpdatedExpectations(ostream& _stream, string const&) con
 void SemanticTest::parseExpectations(istream& _stream)
 {
 	TestFileParser parser{_stream};
-	auto functionCalls = parser.parseFunctionCalls();
+	auto functionCalls = parser.parseFunctionCalls(m_lineOffset);
 	std::move(functionCalls.begin(), functionCalls.end(), back_inserter(m_tests));
 }
 

test/libsolidity/SemanticTest.h

@@ -64,6 +64,7 @@ public:
 
 private:
 	std::string m_source;
+	std::size_t m_lineOffset;
 	std::vector<TestFunctionCall> m_tests;
 	bool m_runWithYul = false;
 	bool m_runWithoutYul = true;

test/libsolidity/util/TestFileParser.cpp

@@ -48,7 +48,7 @@ char TestFileParser::Scanner::peek() const noexcept
 	return *next;
 }
 
-vector<dev::solidity::test::FunctionCall> TestFileParser::parseFunctionCalls()
+vector<dev::solidity::test::FunctionCall> TestFileParser::parseFunctionCalls(size_t _lineOffset)
 {
 	vector<FunctionCall> calls;
 	if (!accept(Token::EOS))
@@ -70,32 +70,47 @@ vector<dev::solidity::test::FunctionCall> TestFileParser::parseFunctionCalls()
 				if (calls.empty())
 					expect(Token::Newline);
 				else
-					accept(Token::Newline, true);
+					if (accept(Token::Newline, true))
+						m_lineNumber++;
 
-				call.signature = parseFunctionSignature();
-				if (accept(Token::Comma, true))
-					call.value = parseFunctionCallValue();
-				if (accept(Token::Colon, true))
-					call.arguments = parseFunctionCallArguments();
+				try
+				{
+					call.signature = parseFunctionSignature();
+					if (accept(Token::Comma, true))
+						call.value = parseFunctionCallValue();
+					if (accept(Token::Colon, true))
+						call.arguments = parseFunctionCallArguments();
 
-				if (accept(Token::Newline, true))
-					call.displayMode = FunctionCall::DisplayMode::MultiLine;
+					if (accept(Token::Newline, true))
+					{
+						call.displayMode = FunctionCall::DisplayMode::MultiLine;
+						m_lineNumber++;
+					}
 
-				call.arguments.comment = parseComment();
+					call.arguments.comment = parseComment();
 
-				if (accept(Token::Newline, true))
-					call.displayMode = FunctionCall::DisplayMode::MultiLine;
+					if (accept(Token::Newline, true))
+					{
+						call.displayMode = FunctionCall::DisplayMode::MultiLine;
+						m_lineNumber++;
+					}
 
-				expect(Token::Arrow);
-				call.expectations = parseFunctionCallExpectations();
+					expect(Token::Arrow);
+					call.expectations = parseFunctionCallExpectations();
 
-				accept(Token::Newline, true);
-				call.expectations.comment = parseComment();
+					if (accept(Token::Newline, true))
+						m_lineNumber++;
+					call.expectations.comment = parseComment();
 
-				if (call.signature == "constructor()")
-					call.isConstructor = true;
+					if (call.signature == "constructor()")
+						call.isConstructor = true;
 
-				calls.emplace_back(std::move(call));
+					calls.emplace_back(std::move(call));
+				}
+				catch (Error const& _e)
+				{
+					throw Error{_e.type(), "Line " + to_string(_lineOffset + m_lineNumber) + ": " + _e.what()};
+				}
 			}
 		}
 	}
@@ -207,7 +222,10 @@ Parameter TestFileParser::parseParameter()
 {
 	Parameter parameter;
 	if (accept(Token::Newline, true))
+	{
 		parameter.format.newline = true;
+		m_lineNumber++;
+	}
 
 	bool isSigned = false;
 

test/libsolidity/util/TestFileParser.h

@@ -59,7 +59,9 @@ public:
 	/// Throws an exception if a function call cannot be parsed because of its
 	/// incorrect structure, an invalid or unsupported encoding
 	/// of its arguments or expected results.
-	std::vector<FunctionCall> parseFunctionCalls();
+	/// Passes the source line offset, such that parsing errors can be enhanced
+	/// with a line number it occurred in.
+	std::vector<FunctionCall> parseFunctionCalls(std::size_t _lineOffset);
 
 private:
 	using Token = soltest::Token;
@@ -179,6 +181,10 @@ private:
 
 	/// A scanner instance
 	Scanner m_scanner;
+
+	/// The current line number. Incremented when Token::Newline (//) is found and
+	/// used to enhance parser error messages.
+	size_t m_lineNumber = 0;
 };
 
 }

test/libsolidity/util/TestFileParserTests.cpp

@@ -44,7 +44,7 @@ vector<FunctionCall> parse(string const& _source)
 {
 	istringstream stream{_source, ios_base::out};
 	TestFileParser parser{stream};
-	return parser.parseFunctionCalls();
+	return parser.parseFunctionCalls(0);
 }
 
 void testFunctionCall(