1 files changed, 115 insertions, 0 deletions
diff --git a/liblangutil/ParserBase.cpp b/liblangutil/ParserBase.cpp
new file mode 100644
index 00000000..197c2d65
--- /dev/null
+++ b/liblangutil/ParserBase.cpp
@@ -0,0 +1,115 @@
+/*
+    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 2016
+ * Solidity parser shared functionality.
+ */
+
+#include <liblangutil/ParserBase.h>
+#include <liblangutil/Scanner.h>
+#include <liblangutil/ErrorReporter.h>
+
+using namespace std;
+using namespace dev;
+using namespace dev::solidity;
+
+std::shared_ptr<string const> const& ParserBase::sourceName() const
+{
+	return m_scanner->sourceName();
+}
+
+int ParserBase::position() const
+{
+	return m_scanner->currentLocation().start;
+}
+
+int ParserBase::endPosition() const
+{
+	return m_scanner->currentLocation().end;
+}
+
+Token ParserBase::currentToken() const
+{
+	return m_scanner->currentToken();
+}
+
+Token ParserBase::peekNextToken() const
+{
+	return m_scanner->peekNextToken();
+}
+
+std::string ParserBase::currentLiteral() const
+{
+	return m_scanner->currentLiteral();
+}
+
+Token ParserBase::advance()
+{
+	return m_scanner->next();
+}
+
+void ParserBase::expectToken(Token _value, bool _advance)
+{
+	Token tok = m_scanner->currentToken();
+	if (tok != _value)
+	{
+		auto tokenName = [this](Token _token)
+		{
+			if (_token == Token::Identifier)
+				return string("identifier");
+			else if (_token == Token::EOS)
+				return string("end of source");
+			else if (TokenTraits::isReservedKeyword(_token))
+				return string("reserved keyword '") + TokenTraits::friendlyName(_token) + "'";
+			else if (TokenTraits::isElementaryTypeName(_token)) //for the sake of accuracy in reporting
+			{
+				ElementaryTypeNameToken elemTypeName = m_scanner->currentElementaryTypeNameToken();
+				return string("'") + elemTypeName.toString() + "'";
+			}
+			else
+				return string("'") + TokenTraits::friendlyName(_token) + "'";
+		};
+
+		fatalParserError(string("Expected ") + tokenName(_value) + string(" but got ") + tokenName(tok));
+	}
+	if (_advance)
+		m_scanner->next();
+}
+
+void ParserBase::increaseRecursionDepth()
+{
+	m_recursionDepth++;
+	if (m_recursionDepth >= 2560)
+		fatalParserError("Maximum recursion depth reached during parsing.");
+}
+
+void ParserBase::decreaseRecursionDepth()
+{
+	solAssert(m_recursionDepth > 0, "");
+	m_recursionDepth--;
+}
+
+void ParserBase::parserError(string const& _description)
+{
+	m_errorReporter.parserError(SourceLocation(position(), endPosition(), sourceName()), _description);
+}
+
+void ParserBase::fatalParserError(string const& _description)
+{
+	m_errorReporter.fatalParserError(SourceLocation(position(), endPosition(), sourceName()), _description);
+}