Fishery
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bbradson
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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.CompilerServices;
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namespace FisheryLib.Utility.Diagnostics;
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/// <summary>
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/// Helper methods to verify conditions when running code.
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/// </summary>
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[DebuggerStepThrough]
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public static partial class Guard
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{
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/// <summary>
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/// Asserts that the input value is <see langword="null"/>.
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/// </summary>
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/// <typeparam name="T">The type of reference value type being tested.</typeparam>
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/// <param name="value">The input value to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is not <see langword="null"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNull<T>(T? value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value is null)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNull(value, name);
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}
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/// <summary>
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/// Asserts that the input value is <see langword="null"/>.
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/// </summary>
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/// <typeparam name="T">The type of nullable value type being tested.</typeparam>
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/// <param name="value">The input value to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is not <see langword="null"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNull<T>(T? value, [CallerArgumentExpression("value")] string name = "")
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where T : struct
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{
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if (value is null)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNull(value, name);
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}
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/// <summary>
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/// Asserts that the input value is not <see langword="null"/>.
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/// </summary>
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/// <typeparam name="T">The type of reference value type being tested.</typeparam>
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/// <param name="value">The input value to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentNullException">Thrown if <paramref name="value"/> is <see langword="null"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotNull<T>([NotNull] T? value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value is not null)
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return;
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ThrowHelper.ThrowArgumentNullExceptionForIsNotNull<T>(name);
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}
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/// <summary>
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/// Asserts that the input value is not <see langword="null"/>.
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/// </summary>
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/// <typeparam name="T">The type of nullable value type being tested.</typeparam>
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/// <param name="value">The input value to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentNullException">Thrown if <paramref name="value"/> is <see langword="null"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotNull<T>([NotNull] T? value, [CallerArgumentExpression("value")] string name = "")
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where T : struct
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{
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if (value is not null)
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return;
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ThrowHelper.ThrowArgumentNullExceptionForIsNotNull<T?>(name);
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}
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/// <summary>
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/// Asserts that the input value is of a specific type.
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/// </summary>
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/// <typeparam name="T">The type of the input value.</typeparam>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is not of type <typeparamref name="T"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsOfType<T>(object value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value.GetType() == typeof(T))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsOfType<T>(value, name);
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}
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/// <summary>
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/// Asserts that the input value is not of a specific type.
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/// </summary>
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/// <typeparam name="T">The type of the input value.</typeparam>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is of type <typeparamref name="T"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotOfType<T>(object value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value.GetType() != typeof(T))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNotOfType<T>(value, name);
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}
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/// <summary>
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/// Asserts that the input value is of a specific type.
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/// </summary>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="type">The type to look for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if the type of <paramref name="value"/> is not the same as <paramref name="type"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsOfType(object value, Type type, [CallerArgumentExpression("value")] string name = "")
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{
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if (value.GetType() == type)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsOfType(value, type, name);
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}
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/// <summary>
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/// Asserts that the input value is not of a specific type.
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/// </summary>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="type">The type to look for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if the type of <paramref name="value"/> is the same as <paramref name="type"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotOfType(object value, Type type, [CallerArgumentExpression("value")] string name = "")
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{
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if (value.GetType() != type)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNotOfType(value, type, name);
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}
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/// <summary>
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/// Asserts that the input value can be assigned to a specified type.
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/// </summary>
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/// <typeparam name="T">The type to check the input value against.</typeparam>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> can't be assigned to type <typeparamref name="T"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsAssignableToType<T>(object value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value is T)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsAssignableToType<T>(value, name);
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}
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/// <summary>
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/// Asserts that the input value can't be assigned to a specified type.
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/// </summary>
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/// <typeparam name="T">The type to check the input value against.</typeparam>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> can be assigned to type <typeparamref name="T"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotAssignableToType<T>(object value, [CallerArgumentExpression("value")] string name = "")
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{
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if (value is not T)
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNotAssignableToType<T>(value, name);
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}
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/// <summary>
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/// Asserts that the input value can be assigned to a specified type.
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/// </summary>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="type">The type to look for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> can't be assigned to <paramref name="type"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsAssignableToType(object value, Type type, [CallerArgumentExpression("value")] string name = "")
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{
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if (type.IsInstanceOfType(value))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsAssignableToType(value, type, name);
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}
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/// <summary>
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/// Asserts that the input value can't be assigned to a specified type.
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/// </summary>
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/// <param name="value">The input <see cref="object"/> to test.</param>
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/// <param name="type">The type to look for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> can be assigned to <paramref name="type"/>.</exception>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsNotAssignableToType(object value, Type type, [CallerArgumentExpression("value")] string name = "")
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{
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if (!type.IsInstanceOfType(value))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsNotAssignableToType(value, type, name);
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}
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/// <summary>
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/// Asserts that the input value must be the same instance as the target value.
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/// </summary>
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/// <typeparam name="T">The type of input values to compare.</typeparam>
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/// <param name="value">The input <typeparamref name="T"/> value to test.</param>
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/// <param name="target">The target <typeparamref name="T"/> value to test for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is not the same instance as <paramref name="target"/>.</exception>
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/// <remarks>The method is generic to prevent using it with value types.</remarks>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsReferenceEqualTo<T>(T value, T target, [CallerArgumentExpression("value")] string name = "")
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where T : class
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{
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if (ReferenceEquals(value, target))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsReferenceEqualTo<T>(name);
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}
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/// <summary>
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/// Asserts that the input value must not be the same instance as the target value.
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/// </summary>
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/// <typeparam name="T">The type of input values to compare.</typeparam>
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/// <param name="value">The input <typeparamref name="T"/> value to test.</param>
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/// <param name="target">The target <typeparamref name="T"/> value to test for.</param>
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/// <param name="name">The name of the input parameter being tested.</param>
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/// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is the same instance as <paramref name="target"/>.</exception>
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/// <remarks>The method is generic to prevent using it with value types.</remarks>
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static void IsReferenceNotEqualTo<T>(T value, T target, [CallerArgumentExpression("value")] string name = "")
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where T : class
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{
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if (!ReferenceEquals(value, target))
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return;
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ThrowHelper.ThrowArgumentExceptionForIsReferenceNotEqualTo<T>(name);
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}
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}
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