protected override Expression VisitGoto(GotoExpression node)
{
var target = node.Target;
if (!_labels.Contains(target))
{
var data = default(LeaveLabelData);
if (!LeaveLabels.TryGetValue(target, out data))
{
var parameter = default(ParameterExpression);
if (target.Type != typeof(void))
{
parameter = Expression.Parameter(target.Type, FormattableString.Invariant($"__goto{LeaveLabels.Count}"));
}
data = new LeaveLabelData
{
Index = LeaveLabels.Count + 1,
Target = target,
Value = parameter
};
LeaveLabels.Add(target, data);
}
var res = default(Expression);
if (data.Value != null)
{
res =
Expression.Block(
Expression.Assign(_pendingBranch, Helpers.CreateConstantInt32(data.Index)),
Expression.Assign(data.Value, node.Value),
Expression.Goto(_exit, node.Type)
);
}
else
{
res =
Expression.Block(
Expression.Assign(_pendingBranch, Helpers.CreateConstantInt32(data.Index)),
Expression.Goto(_exit, node.Type)
);
}
return(res);
}
return(base.VisitGoto(node));
}
protected override Expression VisitGoto(GotoExpression node)
{
var target = node.Target;
if (!_labels.Contains(target))
{
var data = default(LeaveLabelData);
if (!LeaveLabels.TryGetValue(target, out data))
{
var parameter = default(ParameterExpression);
if (target.Type != typeof(void))
{
parameter = Expression.Parameter(target.Type, FormattableString.Invariant($"__goto{LeaveLabels.Count}"));
}
data = new LeaveLabelData
{
Index = LeaveLabels.Count + 1,
Target = target,
Value = parameter
};
LeaveLabels.Add(target, data);
}
var res = default(Expression);
if (data.Value != null)
{
res =
Expression.Block(
Expression.Assign(_pendingBranch, Helpers.CreateConstantInt32(data.Index)),
Expression.Assign(data.Value, node.Value),
Expression.Goto(_exit, node.Type)
);
}
else
{
res =
Expression.Block(
Expression.Assign(_pendingBranch, Helpers.CreateConstantInt32(data.Index)),
Expression.Goto(_exit, node.Type)
);
}
return res;
}
return base.VisitGoto(node);
}
