2021-02-17 15:52:01 +00:00
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import { canonicalEncode, canonicalString, Encoder } from "./codec";
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import { Tag } from "./constants";
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import { FlexMap, FlexSet, _iterMap } from "./flex";
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import { PreserveOn } from "./symbols";
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import { stringify } from "./text";
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import { DefaultPointer, fromJS, Value } from "./values";
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import { Bytes } from './bytes';
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export type DictionaryType = 'Dictionary' | 'Set';
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export const DictionaryType = Symbol.for('DictionaryType');
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export class Dictionary<V, T extends object = DefaultPointer> extends FlexMap<Value<T>, V> {
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get [DictionaryType](): DictionaryType {
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return 'Dictionary';
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}
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static isDictionary<V, T extends object = DefaultPointer>(x: any): x is Dictionary<V, T> {
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return x?.[DictionaryType] === 'Dictionary';
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}
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static fromJS<V extends object = DefaultPointer, T extends object = DefaultPointer>(x: object): Dictionary<Value<V>, T> {
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if (Dictionary.isDictionary<V, T>(x)) return x as Dictionary<Value<V>, T>;
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const d = new Dictionary<Value<V>, T>();
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Object.entries(x).forEach(([key, value]) => d.set(key, fromJS(value)));
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return d;
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}
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2021-02-22 19:00:15 +00:00
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constructor(items?: readonly [Value<T>, V][]);
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constructor(items?: Iterable<readonly [Value<T>, V]>);
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constructor(items?: Iterable<readonly [Value<T>, V]>) {
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super(canonicalString, items);
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2021-02-17 15:52:01 +00:00
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}
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mapEntries<W, R extends object = DefaultPointer>(f: (entry: [Value<T>, V]) => [Value<R>, W]): Dictionary<W, R> {
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const result = new Dictionary<W, R>();
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for (let oldEntry of this.entries()) {
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const newEntry = f(oldEntry);
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result.set(newEntry[0], newEntry[1])
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}
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return result;
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}
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asPreservesText(): string {
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return '{' +
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Array.from(_iterMap(this.entries(), ([k, v]) =>
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k.asPreservesText() + ': ' + stringify(v))).join(', ') +
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'}';
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}
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clone(): Dictionary<V, T> {
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return new Dictionary(this);
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}
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toString(): string {
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return this.asPreservesText();
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}
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get [Symbol.toStringTag]() { return 'Dictionary'; }
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[PreserveOn](encoder: Encoder<T>) {
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if (encoder.canonical) {
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const pieces = Array.from(this).map(([k, v]) =>
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Bytes.concat([canonicalEncode(k), canonicalEncode(v)]));
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pieces.sort(Bytes.compare);
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encoder.encoderawvalues(Tag.Dictionary, pieces);
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} else {
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encoder.emitbyte(Tag.Dictionary);
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this.forEach((v, k) => {
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encoder.push(k);
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encoder.push(v as unknown as Value<T>); // Suuuuuuuper unsound
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});
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encoder.emitbyte(Tag.End);
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}
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}
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}
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export class Set<T extends object = DefaultPointer> extends FlexSet<Value<T>> {
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get [DictionaryType](): DictionaryType {
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return 'Set';
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}
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static isSet<T extends object = DefaultPointer>(x: any): x is Set<T> {
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return x?.[DictionaryType] === 'Set';
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}
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2021-02-22 19:00:15 +00:00
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constructor(items?: Iterable<Value<T>>) {
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super(canonicalString, items);
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2021-02-17 15:52:01 +00:00
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}
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map<R extends object = DefaultPointer>(f: (value: Value<T>) => Value<R>): Set<R> {
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return new Set(_iterMap(this[Symbol.iterator](), f));
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}
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filter(f: (value: Value<T>) => boolean): Set<T> {
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const result = new Set<T>();
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for (let k of this) if (f(k)) result.add(k);
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return result;
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}
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toString(): string {
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return this.asPreservesText();
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}
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asPreservesText(): string {
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return '#{' +
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Array.from(_iterMap(this.values(), v => v.asPreservesText())).join(', ') +
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'}';
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}
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clone(): Set<T> {
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return new Set(this);
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}
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get [Symbol.toStringTag]() { return 'Set'; }
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[PreserveOn](encoder: Encoder<T>) {
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if (encoder.canonical) {
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const pieces = Array.from(this).map(k => canonicalEncode(k));
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pieces.sort(Bytes.compare);
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encoder.encoderawvalues(Tag.Set, pieces);
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} else {
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encoder.encodevalues(Tag.Set, this);
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}
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}
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}
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