ILSpy/ICSharpCode.NRefactory.CSharp/Refactoring/PatternHelper.cs

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using System;
using ICSharpCode.NRefactory.PatternMatching;

namespace ICSharpCode.NRefactory.CSharp.Refactoring
{
	/// <summary>
	/// Helper class for constructing pattern ASTs.
	/// </summary>
	public class PatternHelper
	{
		/// <summary>
		/// Produces a choice pattern for <c>expr1 op expr2</c> or <c>expr2 op expr1</c>.
		/// </summary>
		public static Expression CommutativeOperator(Expression expr1, BinaryOperatorType op, Expression expr2)
		{
			return new Choice {
				new BinaryOperatorExpression(expr1, op, expr2),
				new BinaryOperatorExpression(expr2.Clone(), op, expr1.Clone())
			};
		}
	}
}