commonMain.org.antlr.v4.kotlinruntime.atn.LexerChannelAction.kt Maven / Gradle / Ivy
// Copyright 2017-present Strumenta and contributors, licensed under Apache 2.0.
// Copyright 2024-present Strumenta and contributors, licensed under BSD 3-Clause.
package org.antlr.v4.kotlinruntime.atn
import org.antlr.v4.kotlinruntime.Lexer
import org.antlr.v4.kotlinruntime.misc.MurmurHash
/**
* Implements the `channel` lexer action by setting [Lexer.channel]
* with the assigned channel.
*
* @param channel The channel value to assign to [Lexer.channel]
*
* @author Sam Harwell
* @since 4.2
*/
public class LexerChannelAction(public val channel: Int) : LexerAction {
/**
* Set to [LexerActionType.CHANNEL] by default.
*/
override val actionType: LexerActionType =
LexerActionType.CHANNEL
/**
* Set to `false` by default.
*/
override val isPositionDependent: Boolean =
false
/**
* This action is implemented by assigning [Lexer.channel] with the
* value provided by [channel].
*/
override fun execute(lexer: Lexer) {
lexer.channel = channel
}
override fun hashCode(): Int {
var hash = MurmurHash.initialize()
hash = MurmurHash.update(hash, actionType.ordinal)
hash = MurmurHash.update(hash, channel)
return MurmurHash.finish(hash, 2)
}
override fun equals(other: Any?): Boolean {
if (other === this) {
return true
}
if (other !is LexerChannelAction) {
return false
}
return channel == other.channel
}
override fun toString(): String =
"channel($channel)"
}