Moving SourceReferenceFormatter into langutil namespace.

liblangutil/SourceReferenceFormatter.h

@@ -0,0 +1,76 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Formatting functions for errors referencing positions and locations in the source.
+ */
+
+#pragma once
+
+#include <ostream>
+#include <sstream>
+#include <functional>
+
+namespace dev
+{
+struct Exception; // forward
+}
+
+namespace langutil
+{
+struct SourceLocation;
+class Scanner;
+
+class SourceReferenceFormatter
+{
+public:
+	using ScannerFromSourceNameFun = std::function<langutil::Scanner const&(std::string const&)>;
+
+	explicit SourceReferenceFormatter(
+		std::ostream& _stream,
+		ScannerFromSourceNameFun _scannerFromSourceName
+	):
+		m_stream(_stream),
+		m_scannerFromSourceName(std::move(_scannerFromSourceName))
+	{}
+
+	/// Prints source location if it is given.
+	void printSourceLocation(langutil::SourceLocation const* _location);
+	void printExceptionInformation(dev::Exception const& _exception, std::string const& _name);
+
+	static std::string formatExceptionInformation(
+		dev::Exception const& _exception,
+		std::string const& _name,
+		ScannerFromSourceNameFun const& _scannerFromSourceName
+	)
+	{
+		std::ostringstream errorOutput;
+
+		SourceReferenceFormatter formatter(errorOutput, _scannerFromSourceName);
+		formatter.printExceptionInformation(_exception, _name);
+		return errorOutput.str();
+	}
+private:
+	/// Prints source name if location is given.
+	void printSourceName(langutil::SourceLocation const* _location);
+
+	std::ostream& m_stream;
+	ScannerFromSourceNameFun m_scannerFromSourceName;
+};
+
+}