parsley.internal.machine.stacks.HintStack.scala Maven / Gradle / Ivy

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/* SPDX-FileCopyrightText: © 2021 Parsley Contributors 
 * SPDX-License-Identifier: BSD-3-Clause
 */
package parsley.internal.machine.stacks

import parsley.internal.machine.errors.DefuncHints

private [machine] final class HintStack(val hints: DefuncHints, val validOffset: Int, val tail: HintStack)
private [machine] object HintStack extends Stack[HintStack] {
    implicit val inst: Stack[HintStack] = this
    type ElemTy = (DefuncHints, Int)
    // $COVERAGE-OFF$
    override protected def show(x: ElemTy): String = {
        val (hints, validOffset) = x
        s"($validOffset, $hints)"
    }
    override protected def head(xs: HintStack): ElemTy = (xs.hints, xs.validOffset)
    override protected def tail(xs: HintStack): HintStack = xs.tail
    // $COVERAGE-ON$
}