1 files changed, 85 insertions, 0 deletions
diff --git a/libsolidity/DeclarationContainer.cpp b/libsolidity/DeclarationContainer.cpp
new file mode 100644
index 00000000..3e23d93b
--- /dev/null
+++ b/libsolidity/DeclarationContainer.cpp
@@ -0,0 +1,85 @@
+/*
+    This file is part of cpp-ethereum.
+
+    cpp-ethereum 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.
+
+    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @author Christian <c@ethdev.com>
+ * @date 2014
+ * Scope - object that holds declaration of names.
+ */
+
+#include <libsolidity/DeclarationContainer.h>
+#include <libsolidity/AST.h>
+#include <libsolidity/Types.h>
+
+using namespace std;
+using namespace dev;
+using namespace dev::solidity;
+
+Declaration const* DeclarationContainer::conflictingDeclaration(Declaration const& _declaration) const
+{
+	ASTString const& name(_declaration.getName());
+	solAssert(!name.empty(), "");
+	vector<Declaration const*> declarations;
+	if (m_declarations.count(name))
+		declarations += m_declarations.at(name);
+	if (m_invisibleDeclarations.count(name))
+		declarations += m_invisibleDeclarations.at(name);
+
+	if (dynamic_cast<FunctionDefinition const*>(&_declaration))
+	{
+		// check that all other declarations with the same name are functions
+		for (Declaration const* declaration: declarations)
+			if (!dynamic_cast<FunctionDefinition const*>(declaration))
+				return declaration;
+	}
+	else if (!declarations.empty())
+		return declarations.front();
+
+	return nullptr;
+}
+
+bool DeclarationContainer::registerDeclaration(Declaration const& _declaration, bool _invisible, bool _update)
+{
+	ASTString const& name(_declaration.getName());
+	if (name.empty())
+		return true;
+
+	if (_update)
+	{
+		solAssert(!dynamic_cast<FunctionDefinition const*>(&_declaration), "Attempt to update function definition.");
+		m_declarations.erase(name);
+		m_invisibleDeclarations.erase(name);
+	}
+	else if (conflictingDeclaration(_declaration))
+		return false;
+
+	if (_invisible)
+		m_invisibleDeclarations[name].push_back(&_declaration);
+	else
+		m_declarations[name].push_back(&_declaration);
+	return true;
+}
+
+std::vector<Declaration const*> DeclarationContainer::resolveName(ASTString const& _name, bool _recursive) const
+{
+	solAssert(!_name.empty(), "Attempt to resolve empty name.");
+	auto result = m_declarations.find(_name);
+	if (result != m_declarations.end())
+		return result->second;
+	if (_recursive && m_enclosingContainer)
+		return m_enclosingContainer->resolveName(_name, true);
+	return vector<Declaration const*>({});
+}