override fun update()

in reactor/Core/src/jetbrains/mps/logic/reactor/core/internal/ReteRuleMatcherImpl.kt [318:348]

• 28 lines of code
• 8 McCabe index (conditional complexity)

            override fun update(nodes: UnionFindLinkedList<ReteNode>, introTrail: Trail, introNodes: MutableMap<Int, MutableList<ReteNode>>): Boolean {
                var found = false
                while (true) {
                    val n = onTopOf.nextNode(nodesIt)
                    if (n == null) break
                    if (n.isInvalid()) {
                        nodesIt.remove()
                        continue
                    }

                    val it = headPosMask.iterator()
                    while (it.hasNext()) {
                        val headPos = it.next()
                        if (n.occupiesHeadPosition(headPos)) continue

                        with(createOccurrenceMatcher(n.subst())) {
                            if (matches(head[headPos], occurrence)) {
                                val intro = AlphaNode(occurrence, headPos, subst())
                                introNodes.getOrPut(occurrence.identity) { arrayListOf() }.add(intro)
                                nodes.add(n.combine(intro, subst()))
                                found = true
                            }
                        }
                    }

                    if (found) {
                        introTrail.add(occurrence.identity)
                    }
                }
                return found
            }