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/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
* Use of this file is governed by the BSD 3-clause license that
* can be found in the LICENSE.txt file in the project root.
*/
using Antlr4.Runtime;
using Antlr4.Runtime.Atn;
using Antlr4.Runtime.Misc;
using Antlr4.Runtime.Sharpen;
namespace Antlr4.Runtime.Atn
{
/// <summary>
/// Implements the
/// <c>channel</c>
/// lexer action by calling
/// <see cref="Lexer.Channel"/>
/// with the assigned channel.
/// </summary>
/// <author>Sam Harwell</author>
/// <since>4.2</since>
public sealed class LexerChannelAction : ILexerAction
{
private readonly int channel;
/// <summary>
/// Constructs a new
/// <paramref name="channel"/>
/// action with the specified channel value.
/// </summary>
/// <param name="channel">
/// The channel value to pass to
/// <see cref="Lexer.Channel"/>
/// .
/// </param>
public LexerChannelAction(int channel)
{
this.channel = channel;
}
/// <summary>
/// Gets the channel to use for the
/// <see cref="Antlr4.Runtime.IToken"/>
/// created by the lexer.
/// </summary>
/// <returns>
/// The channel to use for the
/// <see cref="Antlr4.Runtime.IToken"/>
/// created by the lexer.
/// </returns>
public int Channel
{
get
{
return channel;
}
}
/// <summary><inheritDoc/></summary>
/// <returns>
/// This method returns
/// <see cref="LexerActionType.Channel"/>
/// .
/// </returns>
public LexerActionType ActionType
{
get
{
return LexerActionType.Channel;
}
}
/// <summary><inheritDoc/></summary>
/// <returns>
/// This method returns
/// <see langword="false"/>
/// .
/// </returns>
public bool IsPositionDependent
{
get
{
return false;
}
}
/// <summary>
/// <inheritDoc/>
/// <p>This action is implemented by calling
/// <see cref="Lexer.Channel"/>
/// with the
/// value provided by
/// <see cref="Channel()"/>
/// .</p>
/// </summary>
public void Execute(Lexer lexer)
{
lexer.Channel = channel;
}
public override int GetHashCode()
{
int hash = MurmurHash.Initialize();
hash = MurmurHash.Update(hash, (int)(ActionType));
hash = MurmurHash.Update(hash, channel);
return MurmurHash.Finish(hash, 2);
}
public override bool Equals(object obj)
{
if (obj == this)
{
return true;
}
else
{
if (!(obj is Antlr4.Runtime.Atn.LexerChannelAction))
{
return false;
}
}
return channel == ((Antlr4.Runtime.Atn.LexerChannelAction)obj).channel;
}
public override string ToString()
{
return string.Format("channel({0})", channel);
}
}
}