protected virtual ICode TopLevel(ICode c)
{
this.seen.Add(c);
this.todo.Enqueue(c);
ICode ret = null;
while (todo.Any())
{
var node = todo.Dequeue();
this.BlockStart(node);
var transformed = this.Visit(node);
this.BlockEnd(node, transformed);
if (ret == null)
{
ret = transformed;
}
}
bool anyChanges = false;
foreach (var continuation in this.continuations)
{
var mapped = this.map.ValueOrDefault(continuation.To);
if (mapped != null)
{
continuation.To = (Stmt)mapped;
anyChanges = true;
}
}
if (anyChanges)
{
// Cloned to make sure the returned object will be different from ICode argument
// Other code relies on it being different if this visitor has made changes to the AST
ret = (ICode)ret.Clone();
}
return(ret);
}
