/*
 * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
 * that can be found in the LICENSE file.
 */

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 *  Licensed to the Apache Software Foundation (ASF) under one or more
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/*
 *
 *  Portions, Copyright © 1991-2005 Unicode, Inc. The following applies to Unicode. 
 *
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 *
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 *  2. Additional terms from the Database:
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 */

package kotlin.text.regex

/**
 * Represents node accepting single supplementary codepoint.
 */
internal class SupplementaryCharSet(val codePoint: Int, ignoreCase: Boolean)
    : SequenceSet(Char.toChars(codePoint).concatToString(0, 2), ignoreCase) {

    override val name: String
        get() = patternString

    override fun first(set: AbstractSet): Boolean {
        return when (set) {
            is SupplementaryCharSet -> set.codePoint == codePoint
            is SupplementaryRangeSet -> set.contains(codePoint)
            is CharSet,
            is RangeSet -> false
            else -> true
        }
    }
}
