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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text;
namespace Microsoft.AspNetCore.Analyzers.Infrastructure.VirtualChars;
internal static class Extensions
{
public static bool TryGetEscapeCharacter(this VirtualChar ch, out char escapedChar)
=> TryGetEscapeCharacter(ch.Value, out escapedChar);
public static bool TryGetEscapeCharacter(Rune rune, out char escapedChar)
=> TryGetEscapeCharacter(rune.Value, out escapedChar);
private static bool TryGetEscapeCharacter(int value, out char escapedChar)
{
// Keep in sync with CSharpVirtualCharService.TryAddSingleCharacterEscape
switch (value)
{
// Note: we don't care about single quote as that doesn't need to be escaped when
// producing a normal C# string literal.
// case '\'':
// escaped characters that translate to themselves.
case '"': escapedChar = '"'; return true;
case '\\': escapedChar = '\\'; return true;
// translate escapes as per C# spec 2.4.4.4
case '\0': escapedChar = '0'; return true;
case '\a': escapedChar = 'a'; return true;
case '\b': escapedChar = 'b'; return true;
case '\f': escapedChar = 'f'; return true;
case '\n': escapedChar = 'n'; return true;
case '\r': escapedChar = 'r'; return true;
case '\t': escapedChar = 't'; return true;
case '\v': escapedChar = 'v'; return true;
}
escapedChar = default;
return false;
}
}
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