public static void Assert <T>(this T? @this, string name, T?value, IEqualityComparer <T> comparer, [CallerMemberName] string?caller = null)
{
name.AssertNotBlank(nameof(name));
comparer.AssertNotNull(nameof(comparer));
if (!comparer.Equals(@this, value))
{
throw new ArgumentOutOfRangeException($"{caller} -> {nameof(Assert)}: {(@this is not null ? $"[{@this}]" : "null")} <> {(value is not null ? $"[{value}]" : "null")}.", name);
}
}
/// <remarks>Throws <see cref="ArgumentNullException"/>.</remarks>
public static async ValueTask <bool> HasAsync <T>([NotNullWhen(true)] this IAsyncEnumerable <T>? @this, IAsyncEnumerable <T>?values, IEqualityComparer <T> comparer)
{
comparer.AssertNotNull(nameof(comparer));
if (@this is null)
{
return(false);
}
if (values is null)
{
return(true);
}
await foreach (var value in values)
{
if (!await @this.HasAsync(value, comparer))
{
return(false);
}
}
return(true);
}
/// <summary>
/// <c>await @<paramref name="this"/>.IfAsync(_ => <paramref name="comparer"/>.Equals(_, <paramref name="value"/>)).AnyAsync()</c>
/// </summary>
/// <remarks>Throws <see cref="ArgumentNullException"/>.</remarks>
public static async ValueTask <bool> HasAsync <T>([NotNullWhen(true)] this IAsyncEnumerable <T>? @this, T value, IEqualityComparer <T> comparer)
{
comparer.AssertNotNull(nameof(comparer));
return(await @this.IfAsync(_ => comparer.Equals(_, value)).AnyAsync());
}
