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