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For loop.

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This commit is contained in:
chriseth
2017-11-22 02:35:34 +00:00
committed by Alex Beregszaszi
parent 5e2c066778
commit 19d5c42429
3 changed files with 110 additions and 0 deletions
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libsolidity/formal/SMTChecker.cpp
+42
View File
@@ -126,6 +126,48 @@ bool SMTChecker::visit(WhileStatement const& _node)
return false;
}
bool SMTChecker::visit(ForStatement const& _node)
{
if (_node.initializationExpression())
_node.initializationExpression()->accept(*this);
// Do not reset the init expression part.
auto touchedVariables =
m_variableUsage->touchedVariables(_node.body());
if (_node.condition())
touchedVariables += m_variableUsage->touchedVariables(*_node.condition());
if (_node.loopExpression())
touchedVariables += m_variableUsage->touchedVariables(*_node.loopExpression());
// Remove duplicates
std::sort(touchedVariables.begin(), touchedVariables.end());
touchedVariables.erase(std::unique(touchedVariables.begin(), touchedVariables.end()), touchedVariables.end());
resetVariables(touchedVariables);
if (_node.condition())
{
_node.condition()->accept(*this);
checkBooleanNotConstant(*_node.condition(), "For loop condition is always $VALUE.");
}
VariableSequenceCounters sequenceCountersStart = m_currentSequenceCounter;
m_interface->push();
if (_node.condition())
m_interface->addAssertion(expr(*_node.condition()));
_node.body().accept(*this);
if (_node.loopExpression())
_node.loopExpression()->accept(*this);
m_interface->pop();
m_conditionalExecutionHappened = true;
m_currentSequenceCounter = sequenceCountersStart;
resetVariables(touchedVariables);
return false;
}
void SMTChecker::endVisit(VariableDeclarationStatement const& _varDecl)
{
if (_varDecl.declarations().size() != 1)
libsolidity/formal/SMTChecker.h
+1
View File
@@ -52,6 +52,7 @@ private:
virtual void endVisit(FunctionDefinition const& _node) override;
virtual bool visit(IfStatement const& _node) override;
virtual bool visit(WhileStatement const& _node) override;
virtual bool visit(ForStatement const& _node) override;
virtual void endVisit(VariableDeclarationStatement const& _node) override;
virtual void endVisit(ExpressionStatement const& _node) override;
virtual void endVisit(Assignment const& _node) override;