LoopExpression.cs

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using System.Diagnostics;
 
namespace System.Linq.Expressions;
 
[DebuggerTypeProxy(typeof(LoopExpressionProxy))]
public sealed class LoopExpression : Expression
{
    public sealed override Type Type
    {
        get
        {
            if (BreakLabel != null)
            {
                return BreakLabel.Type;
            }
            return typeof(void);
        }
    }
 
    public sealed override ExpressionType NodeType => ExpressionType.Loop;
 
    public Expression Body { get; }
 
    public LabelTarget? BreakLabel { get; }
 
    public LabelTarget? ContinueLabel { get; }
 
    internal LoopExpression(Expression body, LabelTarget @break, LabelTarget @continue)
    {
        Body = body;
        BreakLabel = @break;
        ContinueLabel = @continue;
    }
 
    protected internal override Expression Accept(ExpressionVisitor visitor)
    {
        return visitor.VisitLoop(this);
    }
 
    public LoopExpression Update(LabelTarget? breakLabel, LabelTarget? continueLabel, Expression body)
    {
        if (breakLabel == BreakLabel && continueLabel == ContinueLabel && body == Body)
        {
            return this;
        }
        return Expression.Loop(body, breakLabel, continueLabel);
    }
}