/****************************************************************************
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**
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** Copyright (C) 2019 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt VS Tools.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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using System.Collections.Generic;
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using System.Text;
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namespace QtVsTools.SyntaxAnalysis
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{
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////////////////////////////////////////////////////////////////////////////////////////////////
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///
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/// CharClassLiteral ( -> CharClassSet.Element -> CharClass -> RegExpr )
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///
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////////////////////////////////////////////////////////////////////////////////////////////////
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/// <summary>
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/// Elementary character class defined by one or more allowed characters
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/// </summary>
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///
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public class CharClassLiteral : CharClassSet.Element
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{
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public string LiteralChars { get; set; }
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protected override IEnumerable<RegExpr> OnRender(RegExpr defaultTokenWs, RegExpr parent,
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StringBuilder pattern, ref RenderMode mode, Stack<Token> tokenStack)
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{
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base.OnRender(defaultTokenWs, parent, pattern, ref mode, tokenStack);
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if ((parent == null || !(parent is CharClass)) && NeedsGroup(LiteralChars))
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pattern.AppendFormat("[{0}]", LiteralChars);
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else
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pattern.Append(LiteralChars);
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return null;
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}
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}
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public abstract partial class CharClass : RegExpr
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{
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public static CharClassLiteral CharLiteral(string s)
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{
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return new CharClassLiteral
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{
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LiteralChars = Escape(s)
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};
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}
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public static CharClassLiteral CharRawLiteral(string s)
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{
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return new CharClassLiteral
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{
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LiteralChars = s
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};
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}
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public static CharClassLiteral CharLiteral(char c)
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{
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return CharLiteral(c.ToString());
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}
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public partial class CharExprBuilder
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{
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public CharClassLiteral this[string s] { get { return CharLiteral(s); } }
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public CharClassLiteral this[char c] { get { return CharLiteral(c); } }
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}
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}
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}
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