commonMain.org.antlr.v4.kotlinruntime.atn.LexerSkipAction.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.atn.LexerSkipAction.Companion.INSTANCE
import org.antlr.v4.kotlinruntime.misc.MurmurHash
/**
* Implements the `skip` lexer action by calling [Lexer.skip].
*
* The `skip` command does not have any parameters, so this action is
* implemented as a singleton instance exposed by [INSTANCE].
*
* @author Sam Harwell
* @since 4.2
*/
public class LexerSkipAction private constructor() : LexerAction {
public companion object {
/**
* Provides a singleton instance of this parameterless lexer action.
*/
public val INSTANCE: LexerSkipAction = LexerSkipAction()
}
/**
* Returns [LexerActionType.SKIP].
*/
override val actionType: LexerActionType =
LexerActionType.SKIP
/**
* Returns `false`.
*/
override val isPositionDependent: Boolean =
false
/**
* This action is implemented by calling [Lexer.skip].
*/
override fun execute(lexer: Lexer): Unit =
lexer.skip()
override fun hashCode(): Int {
var hash = MurmurHash.initialize()
hash = MurmurHash.update(hash, actionType.ordinal)
return MurmurHash.finish(hash, 1)
}
override fun equals(other: Any?): Boolean =
other === this
override fun toString(): String =
"skip"
}