57 lines
1.8 KiB
C#
57 lines
1.8 KiB
C#
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
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using System;
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using System.Globalization;
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namespace ICSharpCode.AvalonEdit.Utils
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{
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/// <summary>
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/// Contains exception-throwing helper methods.
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/// </summary>
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static class ThrowUtil
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{
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/// <summary>
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/// Throws an ArgumentNullException if <paramref name="val"/> is null; otherwise
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/// returns val.
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/// </summary>
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/// <example>
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/// Use this method to throw an ArgumentNullException when using parameters for base
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/// constructor calls.
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/// <code>
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/// public VisualLineText(string text) : base(ThrowUtil.CheckNotNull(text, "text").Length)
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/// </code>
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/// </example>
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public static T CheckNotNull<T>(T val, string parameterName) where T : class
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{
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if (val == null)
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throw new ArgumentNullException(parameterName);
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return val;
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}
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public static int CheckNotNegative(int val, string parameterName)
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{
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if (val < 0)
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throw new ArgumentOutOfRangeException(parameterName, val, "value must not be negative");
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return val;
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}
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public static int CheckInRangeInclusive(int val, string parameterName, int lower, int upper)
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{
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if (val < lower || val > upper)
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throw new ArgumentOutOfRangeException(parameterName, val, "Expected: " + lower.ToString(CultureInfo.InvariantCulture) + " <= " + parameterName + " <= " + upper.ToString(CultureInfo.InvariantCulture));
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return val;
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}
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public static InvalidOperationException NoDocumentAssigned()
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{
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return new InvalidOperationException("Document is null");
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}
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public static InvalidOperationException NoValidCaretPosition()
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{
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return new InvalidOperationException("Could not find a valid caret position in the line");
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}
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}
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}
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