Merge pull request #3892 from ethereum/develop

Merge develop into release for 0.4.22

1 files changed, 47 insertions, 0 deletions

diff --git a/libsolidity/formal/SymbolicBoolVariable.cpp b/libsolidity/formal/SymbolicBoolVariable.cpp
new file mode 100644
index 00000000..5cf22d7d
--- /dev/null
+++ b/libsolidity/formal/SymbolicBoolVariable.cpp
@@ -0,0 +1,47 @@
+/*
+	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/>.
+*/
+
+#include <libsolidity/formal/SymbolicBoolVariable.h>
+
+#include <libsolidity/ast/AST.h>
+
+using namespace std;
+using namespace dev;
+using namespace dev::solidity;
+
+SymbolicBoolVariable::SymbolicBoolVariable(
+	Declaration const& _decl,
+	smt::SolverInterface&_interface
+):
+	SymbolicVariable(_decl, _interface)
+{
+	solAssert(m_declaration.type()->category() == Type::Category::Bool, "");
+}
+
+smt::Expression SymbolicBoolVariable::valueAtSequence(int _seq) const
+{
+	return m_interface.newBool(uniqueSymbol(_seq));
+}
+
+void SymbolicBoolVariable::setZeroValue(int _seq)
+{
+	m_interface.addAssertion(valueAtSequence(_seq) == smt::Expression(false));
+}
+
+void SymbolicBoolVariable::setUnknownValue(int)
+{
+}