57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
"use strict";
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import { Coder } from "./abstract-coder";
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import { pack, unpack } from "./array";
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export class TupleCoder extends Coder {
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constructor(coders, localName) {
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let dynamic = false;
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const types = [];
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coders.forEach((coder) => {
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if (coder.dynamic) {
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dynamic = true;
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}
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types.push(coder.type);
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});
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const type = ("tuple(" + types.join(",") + ")");
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super("tuple", type, localName, dynamic);
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this.coders = coders;
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}
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defaultValue() {
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const values = [];
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this.coders.forEach((coder) => {
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values.push(coder.defaultValue());
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});
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// We only output named properties for uniquely named coders
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const uniqueNames = this.coders.reduce((accum, coder) => {
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const name = coder.localName;
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if (name) {
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if (!accum[name]) {
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accum[name] = 0;
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}
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accum[name]++;
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}
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return accum;
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}, {});
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// Add named values
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this.coders.forEach((coder, index) => {
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let name = coder.localName;
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if (!name || uniqueNames[name] !== 1) {
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return;
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}
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if (name === "length") {
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name = "_length";
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}
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if (values[name] != null) {
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return;
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}
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values[name] = values[index];
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});
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return Object.freeze(values);
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}
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encode(writer, value) {
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return pack(writer, this.coders, value);
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}
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decode(reader) {
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return reader.coerce(this.name, unpack(reader, this.coders));
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}
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}
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//# sourceMappingURL=tuple.js.map
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