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//
// TokenNode.cs
//
// Author:
// Mike Krüger <mkrueger@novell.com>
//
// Copyright (c) 2010 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
namespace ICSharpCode.NRefactory.CSharp
{
/// <summary>
/// Represents a token in C#. Note that the type of the token is defined through the TokenRole.
/// </summary>
/// <remarks>
/// In all non null c# token nodes the Role of a CSharpToken must be a TokenRole.
/// </remarks>
public class CSharpTokenNode : AstNode
{
public static new readonly CSharpTokenNode Null = new NullCSharpTokenNode ();
class NullCSharpTokenNode : CSharpTokenNode
{
public override bool IsNull {
get {
return true;
}
}
public NullCSharpTokenNode () : base (TextLocation.Empty, null)
{
}
public override void AcceptVisitor (IAstVisitor visitor)
{
}
public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
{
return default (T);
}
public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
{
return default (S);
}
protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
{
return other == null || other.IsNull;
}
}
public override NodeType NodeType {
get {
return NodeType.Token;
}
}
TextLocation startLocation;
public override TextLocation StartLocation {
get {
return startLocation;
}
}
int TokenLength {
get {
return TokenRole.TokenLengths [(int)(this.flags >> AstNodeFlagsUsedBits)];
}
}
public override TextLocation EndLocation {
get {
return new TextLocation (StartLocation.Line, StartLocation.Column + TokenLength);
}
}
public CSharpTokenNode (TextLocation location, TokenRole role)
{
this.startLocation = location;
if (role != null)
this.flags |= role.TokenIndex << AstNodeFlagsUsedBits;
}
public override string ToString(CSharpFormattingOptions formattingOptions)
{
return TokenRole.Tokens [(int)(this.flags >> AstNodeFlagsUsedBits)];
}
public override void AcceptVisitor (IAstVisitor visitor)
{
visitor.VisitCSharpTokenNode (this);
}
public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
{
return visitor.VisitCSharpTokenNode (this);
}
public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
{
return visitor.VisitCSharpTokenNode (this, data);
}
protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
{
CSharpTokenNode o = other as CSharpTokenNode;
return o != null && !o.IsNull && !(o is CSharpModifierToken);
}
}
}
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