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[First] Complete first extension.
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-83
lines changed

5 files changed

+410
-83
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‎src/StructLinq/First/RefStructCollection.First.cs‎

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// ReSharper disable once CheckNamespace
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using System;
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using System.Runtime.CompilerServices;
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// ReSharper disable once CheckNamespace
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namespace StructLinq
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{
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public static partial class StructEnumerable
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T First<T, TCollection, TEnumerator>(this TCollection collection, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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{
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T first = default;
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if (TryFirst(collection, ref first, x => x))
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return first;
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throw new Exception("No Elements");
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T First<T, TEnumerator>(this IRefStructCollection<T, TEnumerator> collection)
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where TEnumerator : struct, IRefStructEnumerator<T>
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{
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T first = default;
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if (TryFirst(collection, ref first))
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return first;
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throw new Exception("No Elements");
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T First<T, TCollection, TEnumerator>(this TCollection collection, Func<T, bool> predicate, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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{
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T first = default;
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if (TryFirst(collection, predicate, ref first, x => x))
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return first;
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throw new Exception("No Elements");
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T First<T, TEnumerator>(this IRefStructCollection<T, TEnumerator> collection, Func<T, bool> predicate)
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where TEnumerator : struct, IRefStructEnumerator<T>
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{
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T first = default;
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if (TryFirst(collection, predicate, ref first))
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return first;
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throw new Exception("No Elements");
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T First<T, TCollection, TEnumerator, TFunc>(this TCollection collection, ref TFunc predicate, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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where TFunc : struct, IInFunction<T, bool>
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{
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T first = default;
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if (TryFirst(collection, ref predicate, ref first, x => x))
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return first;
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throw new Exception("No Elements");
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool TryFirst<T, TCollection, TEnumerator>(this TCollection collection, ref T first, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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{
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if (collection.Count == 0)
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return false;
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ref var result = ref collection.Get(0);
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first = result;
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return true;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool TryFirst<T, TEnumerator>(this IRefStructCollection<T, TEnumerator> collection, ref T first)
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where TEnumerator : struct, IRefStructEnumerator<T>
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{
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if (collection.Count == 0)
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return false;
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ref var result = ref collection.Get(0);
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first = result;
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return true;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool TryFirst<T, TCollection, TEnumerator>(this TCollection collection, Func<T, bool> predicate, ref T first, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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{
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if (collection.Count == 0)
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return false;
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for (int i = 0; i < collection.Count; i++)
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{
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ref var result = ref collection.Get(i);
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if (predicate(result))
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{
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first = result;
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return true;
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}
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}
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return false;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool TryFirst<T, TEnumerator>(this IRefStructCollection<T, TEnumerator> collection, Func<T, bool> predicate, ref T first)
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where TEnumerator : struct, IRefStructEnumerator<T>
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{
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if (collection.Count == 0)
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return false;
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for (int i = 0; i < collection.Count; i++)
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{
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ref var result = ref collection.Get(i);
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if (predicate(result))
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{
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first = result;
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return true;
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}
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}
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return false;
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}
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static bool TryFirst<T, TCollection, TEnumerator, TFunc>(this TCollection collection, ref TFunc predicate, ref T first, Func<TCollection, IRefStructCollection<T, TEnumerator>> _)
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where TEnumerator : struct, IRefStructEnumerator<T>
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where TCollection : IRefStructCollection<T, TEnumerator>
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where TFunc : struct, IInFunction<T, bool>
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{
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if (collection.Count == 0)
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return false;
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for (int i = 0; i < collection.Count; i++)
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{
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ref var result = ref collection.Get(i);
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if (predicate.Eval(in result))
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{
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first = result;
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return true;
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}
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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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