MathematicaPatternVisitor2.kt

/*
 * Copyright (c) 2013 Patrick Scheibe
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package de.halirutan.mathematica.lang.psi.util

import com.google.common.collect.Lists
import com.google.common.collect.Sets
import com.intellij.psi.PsiElement
import de.halirutan.mathematica.lang.psi.MathematicaVisitor
import de.halirutan.mathematica.lang.psi.api.FunctionCall
import de.halirutan.mathematica.lang.psi.api.Group
import de.halirutan.mathematica.lang.psi.api.Symbol
import de.halirutan.mathematica.lang.psi.api.assignment.SetDelayed
import de.halirutan.mathematica.lang.psi.api.assignment.TagSet
import de.halirutan.mathematica.lang.psi.api.assignment.TagSetDelayed
import de.halirutan.mathematica.lang.psi.api.lists.MList
import de.halirutan.mathematica.lang.psi.api.pattern.*
import de.halirutan.mathematica.lang.psi.api.rules.RuleDelayed

import java.util.LinkedHashSet

/**
 * @author patrick (10/10/13)
 */
class MathematicaPatternVisitor2 : MathematicaVisitor() {

    val patternSymbols = HashSet<Symbol>()


    private fun extractPatternVariables(element: PsiElement) {
        val extractor = PatternSymbolExtractor()
        element.accept(extractor)
        patternSymbols.addAll(extractor.patternSymbols)
    }

    override fun visitSetDelayed(setDelayed: SetDelayed) {
        val lhs = setDelayed.firstChild
        extractPatternVariables(lhs)
    }

    override fun visitSet(set: de.halirutan.mathematica.lang.psi.api.assignment.Set) {
        val lhs = set.firstChild
        extractPatternVariables(lhs)
    }

    override fun visitTagSet(tagSet: TagSet) {
        val firstChild = tagSet.firstChild ?: return
        val operator = MathematicaPsiUtilities.getNextSiblingSkippingWhitespace(firstChild) ?: return
        val pattern = MathematicaPsiUtilities.getNextSiblingSkippingWhitespace(operator)
        extractPatternVariables(pattern)
    }


    override fun visitTagSetDelayed(tagSetDelayed: TagSetDelayed) {
        val firstChild = tagSetDelayed.firstChild
        val operator = MathematicaPsiUtilities.getNextSiblingSkippingWhitespace(firstChild) ?: return
        val pattern = MathematicaPsiUtilities.getNextSiblingSkippingWhitespace(operator)
        extractPatternVariables(pattern)
    }

    override fun visitRuleDelayed(ruleDelayed: RuleDelayed) {
        val lhs = ruleDelayed.firstChild
        extractPatternVariables(lhs)
    }

}