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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
{
////////////////////////////////////////////////////////////////////////////////////////////////
///
/// CharClassRange ( -> CharClassSet.Element -> CharClass -> RegExpr )
///
////////////////////////////////////////////////////////////////////////////////////////////////
/// <summary>
/// Represents an elementary character class defined by a range of characters
/// </summary>
///
public partial class CharClassRange : CharClassSet.Element
{
public CharClassLiteral LowerBound { get; set; }
public CharClassLiteral UpperBound { 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)
pattern.Append("[");
return Items(LowerBound, UpperBound);
}
protected override void OnRenderNext(RegExpr defaultTokenWs, RegExpr parent,
StringBuilder pattern, ref RenderMode mode, Stack<Token> tokenStack)
{
base.OnRenderNext(defaultTokenWs, parent, pattern, ref mode, tokenStack);
pattern.Append("-");
}
protected override void OnRenderEnd(RegExpr defaultTokenWs, RegExpr parent,
StringBuilder pattern, ref RenderMode mode, Stack<Token> tokenStack)
{
base.OnRenderEnd(defaultTokenWs, parent, pattern, ref mode, tokenStack);
if (parent is not CharClass)
pattern.Append("]");
}
}
public abstract partial class CharClass : RegExpr
{
public static CharClassRange CharRange(string lBound, string uBound)
{
return CharRange(CharLiteral(lBound), CharLiteral(uBound));
}
public static CharClassRange CharRange(CharClassLiteral lBound, CharClassLiteral uBound)
{
return new CharClassRange
{
LowerBound = lBound,
UpperBound = uBound
};
}
public partial class CharExprBuilder
{
public CharClassRange this[char lBound, char uBound] =>
CharRange(lBound.ToString(), uBound.ToString());
}
}
}
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