Improved external interface for multi-source and multi-contract compilation.

BaseTypes.h

@@ -37,14 +37,13 @@ namespace solidity
  */
 struct Location
 {
-	Location(int _start, int _end): start(_start), end(_end) { }
+	Location(int _start, int _end, std::shared_ptr<std::string const> _sourceName):
+		start(_start), end(_end), sourceName(_sourceName) { }
 	Location(): start(-1), end(-1) { }
 
-	bool IsValid() const { return !!sourceName && start >= 0 && end >= start; }
-
-	std::shared_ptr<std::string> sourceName;
 	int start;
 	int end;
+	std::shared_ptr<std::string const> sourceName;
 };
 
 /// Stream output for Location (used e.g. in boost exceptions).

CompilerStack.cpp

@@ -81,10 +81,20 @@ void CompilerStack::parse(string const& _sourceCode)
 	parse();
 }
 
-void CompilerStack::compile(bool _optimize)
+vector<string> CompilerStack::getContractNames()
 {
 	if (!m_parseSuccessful)
 		BOOST_THROW_EXCEPTION(CompilerError() << errinfo_comment("Parsing was not successful."));
+	vector<string> contractNames;
+	for (auto const& contract: m_contracts)
+		contractNames.push_back(contract.first);
+	return contractNames;
+}
+
+void CompilerStack::compile(bool _optimize)
+{
+	if (!m_parseSuccessful)
+		parse();
 	for (Source const* source: m_sourceOrder)
 		for (ASTPointer<ASTNode> const& node: source->ast->getNodes())
 			if (ContractDefinition* contract = dynamic_cast<ContractDefinition*>(node.get()))

CompilerStack.h

@@ -54,6 +54,9 @@ public:
 	void parse();
 	/// Sets the given source code as the only source unit and parses it.
 	void parse(std::string const& _sourceCode);
+	/// Returns a list of the contract names in the sources.
+	std::vector<std::string> getContractNames();
+
 	/// Compiles the source units that were prevously added and parsed.
 	void compile(bool _optimize = false);
 	/// Parses and compiles the given source code.

Exceptions.h

@@ -37,7 +37,6 @@ struct DeclarationError: virtual Exception {};
 struct CompilerError: virtual Exception {};
 struct InternalCompilerError: virtual Exception {};
 
-typedef boost::error_info<struct tag_sourcePosition, int> errinfo_sourcePosition;
 typedef boost::error_info<struct tag_sourceLocation, Location> errinfo_sourceLocation;
 
 }

Parser.cpp

@@ -39,7 +39,8 @@ namespace solidity
 class Parser::ASTNodeFactory
 {
 public:
-	ASTNodeFactory(Parser const& _parser): m_parser(_parser), m_location(_parser.getPosition(), -1) {}
+	ASTNodeFactory(Parser const& _parser):
+		m_parser(_parser), m_location(_parser.getPosition(), -1, _parser.getSourceName()) {}
 
 	void markEndPosition() { m_location.end = m_parser.getEndPosition(); }
 	void setLocationEmpty() { m_location.end = m_location.start; }
@@ -81,6 +82,11 @@ ASTPointer<SourceUnit> Parser::parse(shared_ptr<Scanner> const& _scanner)
 	return nodeFactory.createNode<SourceUnit>(nodes);
 }
 
+std::shared_ptr<const string> const& Parser::getSourceName() const
+{
+	return m_scanner->getSourceName();
+}
+
 int Parser::getPosition() const
 {
 	return m_scanner->getCurrentLocation().start;
@@ -579,7 +585,8 @@ ASTPointer<ASTString> Parser::getLiteralAndAdvance()
 
 ParserError Parser::createParserError(string const& _description) const
 {
-	return ParserError() << errinfo_sourcePosition(getPosition()) << errinfo_comment(_description);
+	return ParserError() << errinfo_sourceLocation(Location(getPosition(), getPosition(), getSourceName()))
+						 << errinfo_comment(_description);
 }
 
 

Parser.h

@@ -35,6 +35,7 @@ class Parser
 {
 public:
 	ASTPointer<SourceUnit> parse(std::shared_ptr<Scanner> const& _scanner);
+	std::shared_ptr<std::string const> const& getSourceName() const;
 
 private:
 	class ASTNodeFactory;

Scanner.cpp

@@ -143,16 +143,10 @@ private:
 }; // end of LiteralScope class
 
 
-void Scanner::reset(CharStream const& _source, std::string const& _sourceName)
+void Scanner::reset(CharStream const& _source, string const& _sourceName)
 {
 	m_source = _source;
-
-	shared_ptr<string> sourceName = make_shared<string>(_sourceName);
-	m_currentToken.location.sourceName = sourceName;
-	m_nextToken.location.sourceName = sourceName;
-	m_skippedComment.location.sourceName = sourceName;
-	m_nextSkippedComment.location.sourceName = sourceName;
-
+	m_sourceName = make_shared<string const>(_sourceName);
 	reset();
 }
 

Scanner.h

@@ -142,6 +142,8 @@ public:
 	std::string const& peekLiteral() const { return m_nextToken.literal; }
 	///@}
 
+	std::shared_ptr<std::string const> const& getSourceName() const { return m_sourceName; }
+
 	///@{
 	///@name Error printing helper functions
 	/// Functions that help pretty-printing parse errors
@@ -206,6 +208,7 @@ private:
 	TokenDesc m_nextToken;     // desc for next token (one token look-ahead)
 
 	CharStream m_source;
+	std::shared_ptr<std::string const> m_sourceName;
 
 	/// one character look-ahead, equals 0 at end of input
 	char m_char;

SourceReferenceFormatter.cpp

@@ -21,6 +21,7 @@
  */
 
 #include <libsolidity/SourceReferenceFormatter.h>
+#include <libsolidity/CompilerStack.h>
 #include <libsolidity/Scanner.h>
 #include <libsolidity/Exceptions.h>
 
@@ -38,7 +39,6 @@ void SourceReferenceFormatter::printSourceLocation(ostream& _stream,
 	int startLine;
 	int startColumn;
 	tie(startLine, startColumn) = _scanner.translatePositionToLineColumn(_location.start);
-	_stream << "starting at line " << (startLine + 1) << ", column " << (startColumn + 1) << "\n";
 	int endLine;
 	int endColumn;
 	tie(endLine, endColumn) = _scanner.translatePositionToLineColumn(_location.end);
@@ -58,37 +58,28 @@ void SourceReferenceFormatter::printSourceLocation(ostream& _stream,
 				<< "Spanning multiple lines.\n";
 }
 
-void SourceReferenceFormatter::printSourcePosition(ostream& _stream,
-												   int _position,
-												   const Scanner& _scanner)
-{
-	int line;
-	int column;
-	tie(line, column) = _scanner.translatePositionToLineColumn(_position);
-	_stream << "at line " << (line + 1) << ", column " << (column + 1) << endl
-			<< _scanner.getLineAtPosition(_position) << endl
-			<< string(column, ' ') << "^" << endl;
-}
-
 void SourceReferenceFormatter::printExceptionInformation(ostream& _stream,
 														 Exception const& _exception,
 														 string const& _name,
-														 Scanner const& _scanner)
+														 CompilerStack& _compiler)
 {
+	Location const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
+	Scanner const* scanner;
+
+	if (location)
+	{
+		scanner = &_compiler.getScanner(*location->sourceName);
+		int startLine;
+		int startColumn;
+		tie(startLine, startColumn) = scanner->translatePositionToLineColumn(location->start);
+		_stream << *location->sourceName << ":" << (startLine + 1) << ":" << (startColumn + 1) << ": ";
+	}
 	_stream << _name;
 	if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
-		_stream << ": " << *description;
+		_stream << ": " << *description << endl;
 
-	if (int const* position = boost::get_error_info<errinfo_sourcePosition>(_exception))
-	{
-		_stream << " ";
-		printSourcePosition(_stream, *position, _scanner);
-	}
-	if (Location const* location = boost::get_error_info<errinfo_sourceLocation>(_exception))
-	{
-		_stream << " ";
-		printSourceLocation(_stream, *location, _scanner);
-	}
+	if (location)
+		printSourceLocation(_stream, *location, *scanner);
 }
 
 }

SourceReferenceFormatter.h

@@ -34,14 +34,14 @@ namespace solidity
 {
 
 class Scanner; // forward
+class CompilerStack; // forward
 
 struct SourceReferenceFormatter
 {
 public:
 	static void printSourceLocation(std::ostream& _stream, Location const& _location, Scanner const& _scanner);
-	static void printSourcePosition(std::ostream& _stream, int _position, Scanner const& _scanner);
 	static void printExceptionInformation(std::ostream& _stream, Exception const& _exception,
-										  std::string const& _name, Scanner const& _scanner);
+										  std::string const& _name, CompilerStack& _compiler);
 };
 
 }