61 lines
2.7 KiB
Plaintext
61 lines
2.7 KiB
Plaintext
"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || (function () {
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var ownKeys = function(o) {
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ownKeys = Object.getOwnPropertyNames || function (o) {
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var ar = [];
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for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
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return ar;
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};
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return ownKeys(o);
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};
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return function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
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__setModuleDefault(result, mod);
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return result;
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};
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})();
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isPossiblyTruthy = exports.isPossiblyFalsy = void 0;
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const tsutils = __importStar(require("ts-api-utils"));
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const ts = __importStar(require("typescript"));
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const getValueOfLiteralType_1 = require("./getValueOfLiteralType");
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// Truthiness utilities
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const isTruthyLiteral = (type) => tsutils.isTrueLiteralType(type) ||
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(type.isLiteral() && !!(0, getValueOfLiteralType_1.getValueOfLiteralType)(type));
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const isPossiblyFalsy = (type) => tsutils
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.unionConstituents(type)
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// Intersections like `string & {}` can also be possibly falsy,
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// requiring us to look into the intersection.
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.flatMap(type => tsutils.intersectionConstituents(type))
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// PossiblyFalsy flag includes literal values, so exclude ones that
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// are definitely truthy
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.filter(t => !isTruthyLiteral(t))
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.some(type => tsutils.isTypeFlagSet(type, ts.TypeFlags.PossiblyFalsy));
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exports.isPossiblyFalsy = isPossiblyFalsy;
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const isPossiblyTruthy = (type) => tsutils
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.unionConstituents(type)
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.map(type => tsutils.intersectionConstituents(type))
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.some(intersectionParts =>
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// It is possible to define intersections that are always falsy,
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// like `"" & { __brand: string }`.
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intersectionParts.every(type => !tsutils.isFalsyType(type)));
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exports.isPossiblyTruthy = isPossiblyTruthy;
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