611 lines
19 KiB
JavaScript
611 lines
19 KiB
JavaScript
import {
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ProtoRecord,
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Record,
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RECORD_FLAG_COLLECTION,
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RECORD_FLAG_IMPLICIT_RECEIVER,
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RECORD_TYPE_CONST,
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RECORD_TYPE_INVOKE_CLOSURE,
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RECORD_TYPE_INVOKE_FORMATTER,
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RECORD_TYPE_INVOKE_METHOD,
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RECORD_TYPE_INVOKE_PURE_FUNCTION,
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RECORD_TYPE_PROPERTY
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} from './record';
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import {FIELD, IMPLEMENTS, isBlank, isPresent, int, toBool, autoConvertAdd, BaseException,
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NumberWrapper} from 'facade/lang';
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import {List, Map, ListWrapper, MapWrapper} from 'facade/collection';
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import {ContextWithVariableBindings} from './parser/context_with_variable_bindings';
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import {
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AccessMember,
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Assignment,
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AST,
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AstVisitor,
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Binary,
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Chain,
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Collection,
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Conditional,
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Formatter,
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FunctionCall,
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ImplicitReceiver,
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KeyedAccess,
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LiteralArray,
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LiteralMap,
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LiteralPrimitive,
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MethodCall,
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PrefixNot
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} from './parser/ast';
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export class ProtoRecordRange {
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recordCreator: ProtoRecordCreator;
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constructor() {
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this.recordCreator = null;
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}
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/**
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* Parses [ast] into [ProtoRecord]s and adds them to [ProtoRecordRange].
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*
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* @param ast The expression to watch
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* @param expressionMemento an opaque object which will be passed to WatchGroupDispatcher on
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* detecting a change.
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* @param content Wether to watch collection content (true) or reference (false, default)
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*/
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addRecordsFromAST(ast:AST,
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expressionMemento,
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groupMemento,
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content:boolean = false)
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{
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if (this.recordCreator === null) {
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this.recordCreator = new ProtoRecordCreator(this);
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}
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if (content) {
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ast = new Collection(ast);
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}
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this.recordCreator.createRecordsFromAST(ast, expressionMemento, groupMemento);
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}
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// TODO(rado): the type annotation should be dispatcher:WatchGroupDispatcher.
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// but @Implements is not ready yet.
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instantiate(dispatcher, formatters:Map):RecordRange {
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var recordRange:RecordRange = new RecordRange(this, dispatcher);
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if (this.recordCreator !== null) {
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this._createRecords(recordRange, formatters);
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this._setDestination();
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}
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return recordRange;
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}
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_createRecords(recordRange:RecordRange, formatters:Map) {
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for (var proto = this.recordCreator.headRecord; proto != null; proto = proto.next) {
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var record = new Record(recordRange, proto, formatters);
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proto.recordInConstruction = record;
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recordRange.addRecord(record);
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}
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}
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_setDestination() {
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for (var proto = this.recordCreator.headRecord; proto != null; proto = proto.next) {
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if (proto.dest instanceof Destination) {
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proto.recordInConstruction.dest = proto.dest.record.recordInConstruction;
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} else {
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proto.recordInConstruction.dest = proto.dest;
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}
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proto.recordInConstruction = null;
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}
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}
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}
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export class RecordRange {
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protoRecordRange:ProtoRecordRange;
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dispatcher:any; //WatchGroupDispatcher
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headRecord:Record;
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tailRecord:Record;
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disabled:boolean;
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// TODO(rado): the type annotation should be dispatcher:WatchGroupDispatcher.
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// but @Implements is not ready yet.
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constructor(protoRecordRange:ProtoRecordRange, dispatcher) {
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this.protoRecordRange = protoRecordRange;
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this.dispatcher = dispatcher;
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this.disabled = false;
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this.headRecord = Record.createMarker(this);
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this.tailRecord = Record.createMarker(this);
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_link(this.headRecord, this.tailRecord);
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}
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/// addRecord assumes that the record is newly created, so it is enabled.
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addRecord(record:Record) {
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var lastRecord = this.tailRecord.prev;
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_link(lastRecord, record);
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if (!lastRecord.disabled) {
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_linkEnabled(lastRecord, record);
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}
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_link(record, this.tailRecord);
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}
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addRange(child:RecordRange) {
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var lastRecord = this.tailRecord.prev;
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var prevEnabledRecord = RecordRange._prevEnabled(this.tailRecord);
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var nextEnabledRerord = RecordRange._nextEnabled(this.tailRecord);
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var firstEnabledChildRecord = child.findFirstEnabledRecord();
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var lastEnabledChildRecord = child.findLastEnabledRecord();
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_link(lastRecord, child.headRecord);
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_link(child.tailRecord, this.tailRecord);
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if (isPresent(prevEnabledRecord) && isPresent(firstEnabledChildRecord)) {
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_linkEnabled(prevEnabledRecord, firstEnabledChildRecord);
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}
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if (isPresent(nextEnabledRerord) && isPresent(lastEnabledChildRecord)) {
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_linkEnabled(lastEnabledChildRecord, nextEnabledRerord);
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}
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}
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remove() {
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var firstEnabledChildRecord = this.findFirstEnabledRecord();
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var lastEnabledChildRecord = this.findLastEnabledRecord();
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var next = this.tailRecord.next;
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var prev = this.headRecord.prev;
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_link(prev, next);
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if (isPresent(firstEnabledChildRecord)) {
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var nextEnabled = lastEnabledChildRecord.nextEnabled;
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var prevEnabled = firstEnabledChildRecord.prevEnabled;
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if (isPresent(nextEnabled)) nextEnabled.prevEnabled = prevEnabled;
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if (isPresent(prevEnabled)) prevEnabled.nextEnabled = nextEnabled;
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}
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}
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disableRecord(record:Record) {
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var prevEnabled = record.prevEnabled;
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var nextEnabled = record.nextEnabled;
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if (isPresent(prevEnabled)) prevEnabled.nextEnabled = nextEnabled;
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if (isPresent(nextEnabled)) nextEnabled.prevEnabled = prevEnabled;
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record.disabled = true;
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}
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enableRecord(record:Record) {
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if (!record.disabled) return;
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var prevEnabled = RecordRange._prevEnabled(record);
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var nextEnabled = RecordRange._nextEnabled(record);
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record.prevEnabled = prevEnabled;
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record.nextEnabled = nextEnabled;
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if (isPresent(prevEnabled)) prevEnabled.nextEnabled = record;
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if (isPresent(nextEnabled)) nextEnabled.prevEnabled = record;
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record.disabled = false;
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}
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disable() {
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var firstEnabledChildRecord = this.findFirstEnabledRecord();
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var lastEnabledChildRecord = this.findLastEnabledRecord();
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var nextEnabled = isPresent(lastEnabledChildRecord) ?
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lastEnabledChildRecord.nextEnabled : null;
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var prevEnabled = isPresent(firstEnabledChildRecord) ?
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firstEnabledChildRecord.prevEnabled : null;
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if (isPresent(nextEnabled)) nextEnabled.prevEnabled = prevEnabled;
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if (isPresent(prevEnabled)) prevEnabled.nextEnabled = nextEnabled;
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this.disabled = true;
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}
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enable() {
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var prevEnabledRecord = RecordRange._prevEnabled(this.headRecord);
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var nextEnabledRecord = RecordRange._nextEnabled(this.tailRecord);
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var firstEnabledthisRecord = this.findFirstEnabledRecord();
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var lastEnabledthisRecord = this.findLastEnabledRecord();
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if (isPresent(firstEnabledthisRecord) && isPresent(prevEnabledRecord)){
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_linkEnabled(prevEnabledRecord, firstEnabledthisRecord);
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}
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if (isPresent(lastEnabledthisRecord) && isPresent(nextEnabledRecord)){
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_linkEnabled(lastEnabledthisRecord, nextEnabledRecord);
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}
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this.disabled = false;
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}
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/**
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* Returns the first enabled record in the current range.
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*
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* [H ER1 ER2 R3 T] returns ER1
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* [H R1 ER2 R3 T] returns ER2
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*
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* If no enabled records, returns null.
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*
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* [H R1 R2 R3 T] returns null
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*
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* The function skips disabled sub ranges.
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*/
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findFirstEnabledRecord() {
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var record = this.headRecord.next;
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while (record !== this.tailRecord && record.disabled) {
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if (record.isMarkerRecord && record.recordRange.disabled) {
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record = record.recordRange.tailRecord.next;
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} else {
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record = record.next;
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}
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}
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return record === this.tailRecord ? null : record;
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}
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/**
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* Returns the last enabled record in the current range.
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*
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* [H ER1 ER2 R3 T] returns ER2
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* [H R1 ER2 R3 T] returns ER2
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*
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* If no enabled records, returns null.
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*
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* [H R1 R2 R3 T] returns null
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*
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* The function skips disabled sub ranges.
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*/
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findLastEnabledRecord() {
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var record = this.tailRecord.prev;
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while (record !== this.headRecord && record.disabled) {
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if (record.isMarkerRecord && record.recordRange.disabled) {
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record = record.recordRange.headRecord.prev;
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} else {
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record = record.prev;
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}
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}
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return record === this.headRecord ? null : record;
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}
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/**
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* Returns the next enabled record. This search is not limited to the current range.
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*
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* [H ER1 T] [H ER2 T] _nextEnable(ER1) will return ER2
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*
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* The function skips disabled sub ranges.
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*/
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static _nextEnabled(record:Record) {
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record = record.next;
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while (isPresent(record) && record.disabled) {
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if (record.isMarkerRecord && record.recordRange.disabled) {
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record = record.recordRange.tailRecord.next;
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} else {
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record = record.next;
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}
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}
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return record;
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}
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/**
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* Returns the prev enabled record. This search is not limited to the current range.
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*
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* [H ER1 T] [H ER2 T] _nextEnable(ER2) will return ER1
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*
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* The function skips disabled sub ranges.
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*/
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static _prevEnabled(record:Record) {
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record = record.prev;
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while (isPresent(record) && record.disabled) {
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if (record.isMarkerRecord && record.recordRange.disabled) {
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record = record.recordRange.headRecord.prev;
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} else {
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record = record.prev;
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}
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}
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return record;
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}
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/**
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* Sets the context (the object) on which the change detection expressions will
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* dereference themselves on. Since the RecordRange can be reused the context
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* can be re-set many times during the lifetime of the RecordRange.
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*
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* @param context the new context for change detection for the current RecordRange
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*/
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setContext(context) {
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for (var record:Record = this.headRecord;
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record != null;
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record = record.next) {
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if (record.isImplicitReceiver) {
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this._setContextForRecord(context, record);
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}
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}
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}
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_setContextForRecord(context, record:Record) {
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var proto = record.protoRecord;
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while (context instanceof ContextWithVariableBindings) {
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if (context.hasBinding(proto.name)) {
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this._setVarBindingGetter(context, record, proto);
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return;
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}
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context = context.parent;
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}
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this._setRegularGetter(context, record, proto);
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}
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_setVarBindingGetter(context, record:Record, proto:ProtoRecord) {
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record.funcOrValue = _mapGetter(proto.name);
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record.updateContext(context.varBindings);
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}
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_setRegularGetter(context, record:Record, proto:ProtoRecord) {
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record.funcOrValue = proto.funcOrValue;
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record.updateContext(context);
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}
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}
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function _link(a:Record, b:Record) {
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a.next = b;
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b.prev = a;
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}
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function _linkEnabled(a:Record, b:Record) {
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a.nextEnabled = b;
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b.prevEnabled = a;
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}
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export class WatchGroupDispatcher {
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// The record holds the previous value at the time of the call
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onRecordChange(record:Record, context) {}
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}
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//todo: vsavkin: Create Array and Context destinations?
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class Destination {
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record:ProtoRecord;
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position:int;
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constructor(record:ProtoRecord, position:int) {
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this.record = record;
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this.position = position;
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}
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}
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@IMPLEMENTS(AstVisitor)
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class ProtoRecordCreator {
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protoRecordRange:ProtoRecordRange;
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headRecord:ProtoRecord;
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tailRecord:ProtoRecord;
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groupMemento:any;
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constructor(protoRecordRange) {
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this.protoRecordRange = protoRecordRange;
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this.headRecord = null;
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this.tailRecord = null;
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}
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visitImplicitReceiver(ast:ImplicitReceiver, args) {
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throw new BaseException('Should never visit an implicit receiver');
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}
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visitLiteralPrimitive(ast:LiteralPrimitive, dest) {
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this.add(this.construct(RECORD_TYPE_CONST, ast.value, 0, null, dest));
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}
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visitBinary(ast:Binary, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_PURE_FUNCTION,
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_operationToFunction(ast.operation), 2, null, dest);
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ast.left.visit(this, new Destination(record, 0));
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ast.right.visit(this, new Destination(record, 1));
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this.add(record);
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}
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visitPrefixNot(ast:PrefixNot, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_PURE_FUNCTION, _operation_negate, 1, null, dest);
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ast.expression.visit(this, new Destination(record, 0));
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this.add(record);
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}
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visitAccessMember(ast:AccessMember, dest) {
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var record = this.construct(RECORD_TYPE_PROPERTY, ast.getter, 0, ast.name, dest);
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if (ast.receiver instanceof ImplicitReceiver) {
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record.setIsImplicitReceiver();
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} else {
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ast.receiver.visit(this, new Destination(record, null));
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}
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this.add(record);
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}
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visitFormatter(ast:Formatter, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_FORMATTER, ast.name, ast.allArgs.length, null, dest);
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for (var i = 0; i < ast.allArgs.length; ++i) {
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ast.allArgs[i].visit(this, new Destination(record, i));
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}
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this.add(record);
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}
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visitMethodCall(ast:MethodCall, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_METHOD, ast.fn, ast.args.length, null, dest);
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for (var i = 0; i < ast.args.length; ++i) {
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ast.args[i].visit(this, new Destination(record, i));
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}
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if (ast.receiver instanceof ImplicitReceiver) {
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record.setIsImplicitReceiver();
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} else {
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ast.receiver.visit(this, new Destination(record, null));
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}
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this.add(record);
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}
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visitFunctionCall(ast:FunctionCall, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_CLOSURE, null, ast.args.length, null, dest);
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ast.target.visit(this, new Destination(record, null));
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for (var i = 0; i < ast.args.length; ++i) {
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ast.args[i].visit(this, new Destination(record, i));
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}
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this.add(record);
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}
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visitCollection(ast: Collection, dest) {
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var record = this.construct(RECORD_FLAG_COLLECTION, null, null, null, dest);
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ast.value.visit(this, new Destination(record, null));
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this.add(record);
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}
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visitConditional(ast:Conditional, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_PURE_FUNCTION, _cond, 3, null, dest);
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ast.condition.visit(this, new Destination(record, 0));
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ast.trueExp.visit(this, new Destination(record, 1));
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ast.falseExp.visit(this, new Destination(record, 2));
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this.add(record);
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}
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visitKeyedAccess(ast:KeyedAccess, dest) {
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var record = this.construct(RECORD_TYPE_INVOKE_METHOD, _keyedAccess, 1, null, dest);
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ast.obj.visit(this, new Destination(record, null));
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ast.key.visit(this, new Destination(record, 0));
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this.add(record);
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}
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visitLiteralArray(ast:LiteralArray, dest) {
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var length = ast.expressions.length;
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var record = this.construct(RECORD_TYPE_INVOKE_PURE_FUNCTION, _arrayFn(length), length, null, dest);
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for (var i = 0; i < length; ++i) {
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ast.expressions[i].visit(this, new Destination(record, i));
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}
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this.add(record);
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}
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visitLiteralMap(ast:LiteralMap, dest) {
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var length = ast.values.length;
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var record = this.construct(RECORD_TYPE_INVOKE_PURE_FUNCTION, _mapFn(ast.keys, length), length, null, dest);
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for (var i = 0; i < length; ++i) {
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ast.values[i].visit(this, new Destination(record, i));
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}
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this.add(record);
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}
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visitChain(ast:Chain, dest){this._unsupported();}
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visitAssignment(ast:Assignment, dest) {this._unsupported();}
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visitTemplateBindings(ast, dest) {this._unsupported();}
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createRecordsFromAST(ast:AST, expressionMemento:any, groupMemento:any){
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this.groupMemento = groupMemento;
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ast.visit(this, expressionMemento);
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}
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construct(recordType, funcOrValue, arity, name, dest) {
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return new ProtoRecord(this.protoRecordRange, recordType, funcOrValue, arity, name, dest, this.groupMemento);
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}
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add(protoRecord:ProtoRecord) {
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if (this.headRecord === null) {
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this.headRecord = this.tailRecord = protoRecord;
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} else {
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this.tailRecord.next = protoRecord;
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this.tailRecord = protoRecord;
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}
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}
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_unsupported() {
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throw new BaseException("Unsupported");
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}
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}
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function _operationToFunction(operation:string):Function {
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switch(operation) {
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case '+' : return _operation_add;
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case '-' : return _operation_subtract;
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case '*' : return _operation_multiply;
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case '/' : return _operation_divide;
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case '%' : return _operation_remainder;
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case '==' : return _operation_equals;
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case '!=' : return _operation_not_equals;
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|
case '<' : return _operation_less_then;
|
|
case '>' : return _operation_greater_then;
|
|
case '<=' : return _operation_less_or_equals_then;
|
|
case '>=' : return _operation_greater_or_equals_then;
|
|
case '&&' : return _operation_logical_and;
|
|
case '||' : return _operation_logical_or;
|
|
default: throw new BaseException(`Unsupported operation ${operation}`);
|
|
}
|
|
}
|
|
|
|
function _operation_negate(value) {return !value;}
|
|
function _operation_add(left, right) {return left + right;}
|
|
function _operation_subtract(left, right) {return left - right;}
|
|
function _operation_multiply(left, right) {return left * right;}
|
|
function _operation_divide(left, right) {return left / right;}
|
|
function _operation_remainder(left, right) {return left % right;}
|
|
function _operation_equals(left, right) {return left == right;}
|
|
function _operation_not_equals(left, right) {return left != right;}
|
|
function _operation_less_then(left, right) {return left < right;}
|
|
function _operation_greater_then(left, right) {return left > right;}
|
|
function _operation_less_or_equals_then(left, right) {return left <= right;}
|
|
function _operation_greater_or_equals_then(left, right) {return left >= right;}
|
|
function _operation_logical_and(left, right) {return left && right;}
|
|
function _operation_logical_or(left, right) {return left || right;}
|
|
function _cond(cond, trueVal, falseVal) {return cond ? trueVal : falseVal;}
|
|
|
|
function _arrayFn(length:int) {
|
|
switch (length) {
|
|
case 0: return () => [];
|
|
case 1: return (a1) => [a1];
|
|
case 2: return (a1, a2) => [a1, a2];
|
|
case 3: return (a1, a2, a3) => [a1, a2, a3];
|
|
case 4: return (a1, a2, a3, a4) => [a1, a2, a3, a4];
|
|
case 5: return (a1, a2, a3, a4, a5) => [a1, a2, a3, a4, a5];
|
|
case 6: return (a1, a2, a3, a4, a5, a6) => [a1, a2, a3, a4, a5, a6];
|
|
case 7: return (a1, a2, a3, a4, a5, a6, a7) => [a1, a2, a3, a4, a5, a6, a7];
|
|
case 8: return (a1, a2, a3, a4, a5, a6, a7, a8) => [a1, a2, a3, a4, a5, a6, a7, a8];
|
|
case 9: return (a1, a2, a3, a4, a5, a6, a7, a8, a9) => [a1, a2, a3, a4, a5, a6, a7, a8, a9];
|
|
default: throw new BaseException(`Does not support literal arrays with more than 9 elements`);
|
|
}
|
|
}
|
|
|
|
function _mapFn(keys:List, length:int) {
|
|
function buildMap(values) {
|
|
var res = MapWrapper.create();
|
|
for(var i = 0; i < keys.length; ++i) {
|
|
MapWrapper.set(res, keys[i], values[i]);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
switch (length) {
|
|
case 0: return () => [];
|
|
case 1: return (a1) => buildMap([a1]);
|
|
case 2: return (a1, a2) => buildMap([a1, a2]);
|
|
case 3: return (a1, a2, a3) => buildMap([a1, a2, a3]);
|
|
case 4: return (a1, a2, a3, a4) => buildMap([a1, a2, a3, a4]);
|
|
case 5: return (a1, a2, a3, a4, a5) => buildMap([a1, a2, a3, a4, a5]);
|
|
case 6: return (a1, a2, a3, a4, a5, a6) => buildMap([a1, a2, a3, a4, a5, a6]);
|
|
case 7: return (a1, a2, a3, a4, a5, a6, a7) => buildMap([a1, a2, a3, a4, a5, a6, a7]);
|
|
case 8: return (a1, a2, a3, a4, a5, a6, a7, a8) => buildMap([a1, a2, a3, a4, a5, a6, a7, a8]);
|
|
case 9: return (a1, a2, a3, a4, a5, a6, a7, a8, a9) => buildMap([a1, a2, a3, a4, a5, a6, a7, a8, a9]);
|
|
default: throw new BaseException(`Does not support literal maps with more than 9 elements`);
|
|
}
|
|
}
|
|
|
|
//TODO: cache the getters
|
|
function _mapGetter(key) {
|
|
return function(map) {
|
|
return MapWrapper.get(map, key);
|
|
}
|
|
}
|
|
|
|
function _keyedAccess(obj, args) {
|
|
var key = args[0];
|
|
return obj instanceof Map ? MapWrapper.get(obj, key):obj[key];
|
|
}
|