60 lines
2.6 KiB
C#
60 lines
2.6 KiB
C#
// Copyright 2016-2019, Pulumi Corporation
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using System.Collections.Immutable;
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namespace Pulumi
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{
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/// <summary>
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/// Extension methods for <see cref="Output{T}"/>.
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/// </summary>
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public static class OutputExtensions
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{
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#region Output<ImmutableArray<>>
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/// <summary>
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/// Convert an output containing an array to an output containing the array element
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/// at the specified index.
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/// </summary>
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/// <typeparam name="T">The type of elements in the array.</typeparam>
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/// <param name="array">An array wrapped into <see cref="Output{T}"/>.</param>
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/// <param name="index">An index to get an element at.</param>
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/// <returns>An <see cref="Output{T}"/> containing an array element.</returns>
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public static Output<T> GetAt<T>(this Output<ImmutableArray<T>> array, Input<int> index)
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{
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var inputArray = (Input<ImmutableArray<T>>)array;
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return Output.Tuple(inputArray, index).Apply(v => v.Item1[v.Item2]);
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}
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/// <summary>
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/// Convert an output containing an array to an output containing its first element.
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/// </summary>
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/// <typeparam name="T">The type of elements in the array.</typeparam>
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/// <param name="array">An array wrapped into <see cref="Output{T}"/>.</param>
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/// <returns>An <see cref="Output{T}"/> containing the first array element.</returns>
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public static Output<T> First<T>(this Output<ImmutableArray<T>> array) => array.GetAt(0);
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/// <summary>
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/// Convert an output containing an array to an output containing the length of the array.
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/// </summary>
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/// <typeparam name="T">The type of elements in the array.</typeparam>
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/// <param name="array">An array wrapped into <see cref="Output{T}"/>.</param>
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/// <returns>An <see cref="Output{T}"/> containing the array length.</returns>
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public static Output<int> Length<T>(this Output<ImmutableArray<T>> array)
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=> array.Apply(xs => xs.Length);
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#endregion
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#region Output<Union<,>>
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public static Output<bool> IsT0<T0, T1>(this Output<Union<T0, T1>> output) => output.Apply(v => v.IsT0);
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public static Output<bool> IsT1<T0, T1>(this Output<Union<T0, T1>> output) => output.Apply(v => v.IsT1);
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public static Output<T0> AsT0<T0, T1>(this Output<Union<T0, T1>> output) => output.Apply(v => v.AsT0);
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public static Output<T1> AsT1<T0, T1>(this Output<Union<T0, T1>> output) => output.Apply(v => v.AsT1);
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public static Output<object> Value<T0, T1>(this Output<Union<T0, T1>> output) => output.Apply(v => v.Value);
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#endregion
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}
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}
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