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diff --git a/liblangutil/SourceReferenceExtractor.h b/liblangutil/SourceReferenceExtractor.h
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+/*
+	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/>.
+*/
+#pragma once
+
+#include <iosfwd>
+#include <string>
+#include <tuple>
+#include <vector>
+
+namespace dev
+{
+struct Exception;
+}
+
+namespace langutil
+{
+
+struct LineColumn
+{
+	int line;
+	int column;
+
+	LineColumn(std::tuple<int, int> const& _t): line{std::get<0>(_t)}, column{std::get<1>(_t)} {}
+	LineColumn(int _line, int _column): line{_line}, column{_column} {}
+	LineColumn(): line{-1}, column{-1} {}
+};
+
+struct SourceReference
+{
+	std::string message;    ///< A message that relates to this source reference (such as a warning or an error message).
+	std::string sourceName; ///< Underlying source name (for example the filename).
+	LineColumn position;    ///< Actual (error) position this source reference is surrounding.
+	bool multiline;         ///< Indicates whether the actual SourceReference is truncated to one line.
+	std::string text;       ///< Extracted source code text (potentially truncated if multiline or too long).
+	int startColumn;        ///< Highlighting range-start of text field.
+	int endColumn;          ///< Highlighting range-end of text field.
+
+	/// Constructs a SourceReference containing a message only.
+	static SourceReference MessageOnly(std::string _msg)
+	{
+		return SourceReference{std::move(_msg), "", LineColumn{-1, -1}, false, "", -1, -1};
+	}
+};
+
+struct SourceLocation;
+
+namespace SourceReferenceExtractor
+{
+	struct Message
+	{
+		SourceReference primary;
+		std::string category; // "Error", "Warning", ...
+		std::vector<SourceReference> secondary;
+	};
+
+	Message extract(dev::Exception const& _exception, std::string _category);
+	SourceReference extract(SourceLocation const* _location, std::string message = "");
+}
+
+}