static bool HasBreakto (LabelStatement label)
{
var m = label.GetParent<MethodDeclaration> ();
if (m == null)
return false;
return m.Descendants.OfType<BreakStatement> ().Any (x => {
var l = x.Annotation<LabelStatement> ();
if (l == null)
return false;
return l.Label == label.Label;
});
}
public override void VisitLabelStatement (LabelStatement labelStatement)
{
base.VisitLabelStatement (labelStatement);
var t = labelStatement.GetParent <TryCatchStatement> ();
if (t == null)
return;
if (t.TryBlock.Statements.First () == labelStatement) {
labelStatement.Remove ();
t.Parent.InsertChildBefore (t, labelStatement, (Role<Statement>)t.Role);
}
}
static bool HasGoto (LabelStatement label)
{
var m = label.GetParent<MethodDeclaration> ();
if (m == null)
return false;
return m.Descendants.OfType<GotoStatement> ().Any (x => x.Label == label.Label);
}
public override void VisitLabelStatement (LabelStatement labelStatement)
{
base.VisitLabelStatement (labelStatement);
var ifs = labelStatement.NextSibling as IfElseStatement;
if (ifs == null || !ifs.FalseStatement.IsNull)
return;
var b = ifs.TrueStatement as BlockStatement;
if (b == null || b.Statements.Count == 0)
return;
var gt = b.Statements.Last () as GotoStatement;
if (gt == null || gt.Label != labelStatement.Label)
return;
if (labelStatement.GetParent<MethodDeclaration> ().Descendants.OfType<GotoStatement> ().Count () != 1)
return;
gt.Remove ();
b.Remove ();
var wh = new WhileStatement {
Condition = ifs.Condition.Clone (),
EmbeddedStatement = b,
};
ifs.ReplaceWith (wh);
labelStatement.Remove ();
}