jvmMain.prime.combinator.pasers.implementations.Not.kt Maven / Gradle / Ivy

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package prime.combinator.pasers.implementations

import prime.combinator.pasers.Parsed
import prime.combinator.pasers.ParsedResult
import prime.combinator.pasers.Parser
import prime.combinator.pasers.ParsingError
import prime.combinator.pasers.implementations.Not.NotParsed
import java.util.*
import kotlin.Long

/**
 * Not inverses parser.
 * It doesn't capture end index!
 * @License: Apache-2.0
 * @source: https://github.com/fantaevroman/primeCombinator
 * @author: Roman Fantaev
 * @contact: [email protected]
 * @since 2021
 */
class Not(
    private val parser: Parser
) : Parser {
    inner class NotParsed(previous: Parsed, indexEnd: Long) : Parsed(previous, indexEnd)

    override fun parse(previous: Parsed): ParsedResult {
        val parsed = parser.parse(previous)
        return if (parsed.success()) {
            ParsedResult.asError("Expected failed on Not operation but was success")
        } else {
            ParsedResult.asSuccess(NotParsed(previous, previous.indexEnd))
        }
    }
}