24 lines
1.1 KiB
JavaScript
24 lines
1.1 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.mapToConstant = mapToConstant;
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const nat_1 = require("./nat");
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const IndexToMappedConstant_1 = require("./_internals/mappers/IndexToMappedConstant");
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const globals_1 = require("../utils/globals");
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function computeNumChoices(options) {
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if (options.length === 0)
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throw new globals_1.Error(`fc.mapToConstant expects at least one option`);
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let numChoices = 0;
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for (let idx = 0; idx !== options.length; ++idx) {
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if (options[idx].num < 0)
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throw new globals_1.Error(`fc.mapToConstant expects all options to have a number of entries greater or equal to zero`);
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numChoices += options[idx].num;
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}
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if (numChoices === 0)
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throw new globals_1.Error(`fc.mapToConstant expects at least one choice among options`);
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return numChoices;
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}
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function mapToConstant(...entries) {
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const numChoices = computeNumChoices(entries);
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return (0, nat_1.nat)({ max: numChoices - 1 }).map((0, IndexToMappedConstant_1.indexToMappedConstantMapperFor)(entries), (0, IndexToMappedConstant_1.indexToMappedConstantUnmapperFor)(entries));
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}
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