private VariableDef CreateVariableInDeclaredScope(NameExpression name)
{
var reference = name.GetVariableReference(_entry.Tree);
if (reference != null && reference.Variable != null) {
var declNode = reference.Variable.Scope;
var declScope = _scope.EnumerateTowardsGlobal.FirstOrDefault(s => s.Node == declNode);
if (declScope != null) {
return declScope.CreateVariable(name, _curUnit, name.Name, false);
}
}
return _scope.CreateVariable(name, _curUnit, name.Name, false);
}
public override bool Walk(NameExpression node)
{
var reference = node.GetVariableReference(_collector._root);
return WalkName(node, reference);
}
public override bool Walk(NameExpression node)
{
var reference = node.GetVariableReference(_collector._root);
_collector._allWrites.Add(reference);
_collector._allWrittenVariables.Add(reference.Variable);
return false;
}
public override bool Walk(NameExpression node)
{
var reference = node.GetVariableReference(_root);
if (!_inputCollector._allReads.Contains(reference) && !_inputCollector._allWrites.Contains(reference)) {
// this variable is referenced outside of the refactored code
if (node.StartIndex < _target.Start) {
// it's read before the extracted code, we don't care...
} else {
Debug.Assert(node.EndIndex > _target.End, "didn't reference variable in extracted range");
// it's read after the extracted code, if its written to in the refactored
// code we need to include it as an output
if (_inputCollector._allWrittenVariables.Contains(reference.Variable) &&
(_readByFollowingCodeBeforeInit == null || _readByFollowingCodeBeforeInit.Contains(reference.Variable))) {
// the variable is written to by the refactored code
_outputVars.Add(reference.Variable);
}
}
}
return true;
}
public override bool Walk(NameExpression node)
{
var reference = node.GetVariableReference(_root);
_allReads.Add(reference);
_allReadVariables.Add(reference.Variable);
return true;
}