commonMain.api.grammar.GrammarRule.kt Maven / Gradle / Ivy

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Dynamic, scan-on-demand, parsing; when a regular expression is just not enough

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/**
 * Copyright (C) 2018 Dr. David H. Akehurst (http://dr.david.h.akehurst.net)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.akehurst.language.api.grammar

interface PreferenceRule : GrammarItem {
    val forItem: SimpleItem
    val optionList: List
}

interface PreferenceOption {

    enum class Associativity { LEFT, RIGHT }

    val item: NonTerminal
    val choiceNumber: Int
    val onTerminals: List
    val associativity: Associativity
}

interface GrammarRule : GrammarItem {
    val name: String
    val isOverride: Boolean
    val isSkip: Boolean
    val isLeaf: Boolean
    val isOneEmbedded: Boolean
    val rhs: RuleItem

    val compressedLeaf: Terminal
}

interface NormalRule : GrammarRule {
}

enum class OverrideKind { REPLACE, APPEND_ALTERNATIVE, SUBSTITUTION }

interface OverrideRule : GrammarRule {
    val overrideKind: OverrideKind
    val overridenRhs: RuleItem
}