@reactivex/ix-esnext-esm
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The Interactive Extensions for JavaScript
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{"version":3,"sources":["iterable/operators/memoize.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,SAAS,EAAE,MAAM,cAAc,CAAC;AACzC,OAAO,EAAiB,eAAe,EAAE,YAAY,EAAE,MAAM,iBAAiB,CAAC;AAC/E,OAAO,EAAE,MAAM,EAAE,MAAM,WAAW,CAAC;AAGnC,MAAM,aAAiB,SAAQ,SAAY;IAMzC,YAAY,MAAmB,EAAE,MAAwB;QACvD,KAAK,EAAE,CAAC;QAHF,aAAQ,GAAY,KAAK,CAAC;QAIhC,IAAI,CAAC,OAAO,GAAG,MAAM,CAAC;QACtB,IAAI,CAAC,OAAO,GAAG,MAAM,CAAC;IACxB,CAAC;IAED,sCAAsC;IACtC,CAAC,CAAC,MAAM,CAAC,QAAQ,CAAC;QAChB,IAAI,CAAC,GAAG,CAAC,CAAC;QACV,IAAI;YACF,OAAO,CAAC,EAAE;gBACR,IAAI,QAAQ,GAAG,KAAK,CAAC;gBACrB,IAAI,OAAO,GAAM,EAAE,CAAC;gBACpB,IAAI,CAAC,IAAI,IAAI,CAAC,OAAO,CAAC,KAAK,EAAE;oBAC3B,IAAI,CAAC,IAAI,CAAC,QAAQ,EAAE;wBAClB,IAAI;4BACF,MAAM,IAAI,GAAG,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE,CAAC;4BACjC,QAAQ,GAAG,CAAC,IAAI,CAAC,IAAI,CAAC;4BACtB,qCAAqC;4BACrC,IAAI,QAAQ,EAAE;gCACZ,OAAO,GAAG,IAAI,CAAC,KAAK,CAAC;6BACtB;yBACF;wBAAC,OAAO,CAAC,EAAE;4BACV,IAAI,CAAC,MAAM,GAAG,CAAC,CAAC;4BAChB,IAAI,CAAC,QAAQ,GAAG,IAAI,CAAC;yBACtB;qBACF;oBAED,IAAI,IAAI,CAAC,QAAQ,EAAE;wBACjB,MAAM,IAAI,CAAC,MAAM,CAAC;qBACnB;oBAED,IAAI,QAAQ,EAAE;wBACZ,IAAI,CAAC,OAAO,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;qBAC5B;iBACF;qBAAM;oBACL,QAAQ,GAAG,IAAI,CAAC;iBACjB;gBAED,IAAI,QAAQ,EAAE;oBACZ,MAAM,IAAI,CAAC,OAAO,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;iBAC3B;qBAAM;oBACL,MAAM;iBACP;gBAED,CAAC,EAAE,CAAC;aACL;SACF;gBAAS;YACR,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE,CAAC;SACrB;IACH,CAAC;CACF;AA+BD;;;;;;;;;;;;;GAaG;AACH,MAAM,UAAU,OAAO,CACrB,cAAsB,CAAC,CAAC,EACxB,QAA0D;IAE1D,OAAO,SAAS,uBAAuB,CAAC,MAAyB;QAC/D,IAAI,CAAC,QAAQ,EAAE;YACb,OAAO,WAAW,KAAK,CAAC,CAAC;gBACvB,CAAC,CAAC,IAAI,aAAa,CAAU,MAAM,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE,EAAE,IAAI,eAAe,EAAW,CAAC;gBACvF,CAAC,CAAC,IAAI,aAAa,CACjB,MAAM,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE,EACzB,IAAI,YAAY,CAAU,WAAW,CAAC,CACvC,CAAC;SACL;QACD,OAAO,MAAM,CAAoB,GAAG,EAAE,CACpC,QAAS,CAAC,OAAO,CAAU,WAAW,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE,CACpE,CAAC;IACJ,CAAC,CAAC;AACJ,CAAC","file":"memoize.js","sourcesContent":["import { IterableX } from '../iterablex';\nimport { IRefCountList, MaxRefCountList, RefCountList } from './_refcountlist';\nimport { create } from '../create';\nimport { OperatorFunction } from '../../interfaces';\n\nclass MemoizeBuffer<T> extends IterableX<T> {\n private _source: Iterator<T>;\n private _buffer: IRefCountList<T>;\n private _error: any;\n private _stopped: boolean = false;\n\n constructor(source: Iterator<T>, buffer: IRefCountList<T>) {\n super();\n this._source = source;\n this._buffer = buffer;\n }\n\n // eslint-disable-next-line complexity\n *[Symbol.iterator]() {\n let i = 0;\n try {\n while (1) {\n let hasValue = false;\n let current = <T>{};\n if (i >= this._buffer.count) {\n if (!this._stopped) {\n try {\n const next = this._source.next();\n hasValue = !next.done;\n // eslint-disable-next-line max-depth\n if (hasValue) {\n current = next.value;\n }\n } catch (e) {\n this._error = e;\n this._stopped = true;\n }\n }\n\n if (this._stopped) {\n throw this._error;\n }\n\n if (hasValue) {\n this._buffer.push(current);\n }\n } else {\n hasValue = true;\n }\n\n if (hasValue) {\n yield this._buffer.get(i);\n } else {\n break;\n }\n\n i++;\n }\n } finally {\n this._buffer.done();\n }\n }\n}\n\n/**\n * Creates a buffer with a view over the source sequence, causing a specified number of iterators to obtain access\n * to all of the sequence's elements without causing multiple enumerations over the source.\n * @export\n * @template TSource Source sequence element type.\n * @param {number} [readerCount] Number of iterators that can access the underlying buffer.\n * Once every iterator has obtained an element from the buffer, the element is removed from the buffer.\n * @returns {OperatorFunction<TSource, TSource>} Buffer enabling a specified number of iterators to retrieve all\n * elements from the shared source sequence, without duplicating source iteration side-effects.\n */\nexport function memoize<TSource>(readerCount?: number): OperatorFunction<TSource, TSource>;\n/**\n * Memoizes the source sequence within a selector function where a specified number of iterators can get access\n * to all of the sequence's elements without causing multiple iterations over the source.\n *\n * @export\n * @template TSource Source sequence element type.\n * @template TResult Result sequence element type.\n * @param {number} [readerCount] Number of iterators that can access the underlying buffer. Once every\n * iterator has obtained an element from the buffer, the element is removed from the buffer.\n * @param {(value: Iterable<TSource>) => Iterable<TResult>} [selector] Selector function with memoized access\n * to the source sequence for a specified number of iterators.\n * @returns {OperatorFunction<TSource, TResult>} Sequence resulting from applying the selector function to the\n * memoized view over the source sequence.\n */\nexport function memoize<TSource, TResult>(\n readerCount?: number,\n selector?: (value: Iterable<TSource>) => Iterable<TResult>\n): OperatorFunction<TSource, TResult>;\n/**\n * Memoizes the source sequence within a selector function where a specified number of iterators can get access\n * to all of the sequence's elements without causing multiple iterations over the source.\n *\n * @export\n * @template TSource Source sequence element type.\n * @template TResult Result sequence element type.\n * @param {number} [readerCount=-1] Number of iterators that can access the underlying buffer. Once every\n * iterator has obtained an element from the buffer, the element is removed from the buffer.\n * @param {(value: Iterable<TSource>) => Iterable<TResult>} [selector] Selector function with memoized access\n * to the source sequence for a specified number of iterators.\n * @returns {(OperatorFunction<TSource, TSource | TResult>)} Sequence resulting from applying the selector function to the\n * memoized view over the source sequence.\n */\nexport function memoize<TSource, TResult = TSource>(\n readerCount: number = -1,\n selector?: (value: Iterable<TSource>) => Iterable<TResult>\n): OperatorFunction<TSource, TSource | TResult> {\n return function memoizeOperatorFunction(source: Iterable<TSource>): IterableX<TSource | TResult> {\n if (!selector) {\n return readerCount === -1\n ? new MemoizeBuffer<TSource>(source[Symbol.iterator](), new MaxRefCountList<TSource>())\n : new MemoizeBuffer<TSource>(\n source[Symbol.iterator](),\n new RefCountList<TSource>(readerCount)\n );\n }\n return create<TSource | TResult>(() =>\n selector!(memoize<TSource>(readerCount)(source))[Symbol.iterator]()\n );\n };\n}\n"]}