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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
using System.Collections.Generic;
using System.Text;
namespace QtVsTools.SyntaxAnalysis
{
////////////////////////////////////////////////////////////////////////////////////////////////
///
/// CharClassLiteral ( -> CharClassSet.Element -> CharClass -> RegExpr )
///
////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Elementary character class defined by one or more allowed characters
/// </summary>
///
public class CharClassLiteral : CharClassSet.Element
{
public string LiteralChars { get; set; }
protected override IEnumerable<RegExpr> OnRender(RegExpr defaultTokenWs, RegExpr parent,
StringBuilder pattern, ref RenderMode mode, Stack<Token> tokenStack)
{
base.OnRender(defaultTokenWs, parent, pattern, ref mode, tokenStack);
if (parent is not CharClass && NeedsGroup(LiteralChars))
pattern.AppendFormat("[{0}]", LiteralChars);
else
pattern.Append(LiteralChars);
return null;
}
}
public abstract partial class CharClass : RegExpr
{
public static CharClassLiteral CharLiteral(string s)
{
return new CharClassLiteral
{
LiteralChars = Escape(s)
};
}
public static CharClassLiteral CharRawLiteral(string s)
{
return new CharClassLiteral
{
LiteralChars = s
};
}
public static CharClassLiteral CharLiteral(char c)
{
return CharLiteral(c.ToString());
}
public partial class CharExprBuilder
{
public CharClassLiteral this[string s] => CharLiteral(s);
public CharClassLiteral this[char c] => CharLiteral(c);
}
}
}
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