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101 lines
2.5 KiB
101 lines
2.5 KiB
5 years ago
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#if FAT
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using System;
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using System.Collections.Generic;
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namespace LinqInternal.Collections
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{
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internal static partial class Extensions
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{
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public static T TakeAndReturn<T>(this IDropPoint<T> dropPoint)
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{
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if (dropPoint == null)
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{
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throw new ArgumentNullException("dropPoint");
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}
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T item;
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if (dropPoint.TryTake(out item))
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{
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return item;
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}
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else
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{
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throw new InvalidOperationException();
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}
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}
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public static bool TryTakeAndIgnore<T>(this IDropPoint<T> dropPoint)
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{
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if (dropPoint == null)
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{
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throw new ArgumentNullException("dropPoint");
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}
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T item;
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return dropPoint.TryTake(out item);
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}
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public static bool TryTakeUntil<T>(this IDropPoint<T> dropPoint, Predicate<T> check, out T item)
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{
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if (check == null)
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{
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throw new ArgumentNullException("check");
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}
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if (dropPoint == null)
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{
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throw new ArgumentNullException("dropPoint");
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}
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back:
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if (dropPoint.TryTake(out item))
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{
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if (check(item))
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{
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return true;
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}
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else
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{
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goto back;
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}
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}
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else
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{
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return false;
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}
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}
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public static bool TryTakeUntil<T>(this IDropPoint<T> dropPoint, Predicate<T> check, ICollection<T> trail)
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{
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if (check == null)
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{
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throw new ArgumentNullException("check");
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}
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if (dropPoint == null)
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{
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throw new ArgumentNullException("dropPoint");
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}
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if (trail == null)
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{
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throw new ArgumentNullException("trail");
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}
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T item;
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back:
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if (dropPoint.TryTake(out item))
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{
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if (check(item))
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{
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return true;
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}
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else
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{
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trail.Add(item);
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goto back;
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}
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}
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else
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{
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return false;
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}
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}
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}
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}
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#endif
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