DataStudy/Assets/UnityAsync/AwaitInstructions/WaitWhile.cs

using System;

namespace UnityAsync
{
	public struct WaitWhile : IAwaitInstruction
	{
		readonly Func<bool> condition;

		bool IAwaitInstruction.IsCompleted() => !condition();

		/// <summary>
		/// Waits until the condition returns false before continuing.
		/// </summary>
		public WaitWhile(Func<bool> condition)
		{
			#if UNITY_EDITOR
			if(condition == null)
				throw new ArgumentNullException(nameof(condition), "This check only occurs in edit mode.");
			#endif

			this.condition = condition;
		}
	}
}