Function getIterationTypesOfIterable

test/fixtures/snapshot/typescript.js:83173–83209

* Gets the *yield*, *return*, and *next* types from an `Iterable`-like or `AsyncIterable`-like type. * * At every level that involves analyzing return types of signatures, we union the return types of all the signatures. * * Another thing to note is that at any st

(type, use, errorNode)

         * the `[Symbol.asyncIterator]()` method first, and then the `[Symbol.iterator]()` method.
         */
        function getIterationTypesOfIterable(type, use, errorNode) {
            if (isTypeAny(type)) {
                return anyIterationTypes;
            }
            if (!(type.flags & 1048576 /* TypeFlags.Union */)) {
                var iterationTypes_1 = getIterationTypesOfIterableWorker(type, use, errorNode);
                if (iterationTypes_1 === noIterationTypes) {
                    if (errorNode) {
                        reportTypeNotIterableError(errorNode, type, !!(use & 2 /* IterationUse.AllowsAsyncIterablesFlag */));
                    }
                    return undefined;
                }
                return iterationTypes_1;
            }
            var cacheKey = use & 2 /* IterationUse.AllowsAsyncIterablesFlag */ ? "iterationTypesOfAsyncIterable" : "iterationTypesOfIterable";
            var cachedTypes = getCachedIterationTypes(type, cacheKey);
            if (cachedTypes)
                return cachedTypes === noIterationTypes ? undefined : cachedTypes;
            var allIterationTypes;
            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
                var constituent = _a[_i];
                var iterationTypes_2 = getIterationTypesOfIterableWorker(constituent, use, errorNode);
                if (iterationTypes_2 === noIterationTypes) {
                    if (errorNode) {
                        reportTypeNotIterableError(errorNode, type, !!(use & 2 /* IterationUse.AllowsAsyncIterablesFlag */));
                    }
                    setCachedIterationTypes(type, cacheKey, noIterationTypes);
                    return undefined;
                }
                else {
                    allIterationTypes = ts.append(allIterationTypes, iterationTypes_2);
                }
            }
            var iterationTypes = allIterationTypes ? combineIterationTypes(allIterationTypes) : noIterationTypes;
            setCachedIterationTypes(type, cacheKey, iterationTypes);
            return iterationTypes === noIterationTypes ? undefined : iterationTypes;
        }
        function getAsyncFromSyncIterationTypes(iterationTypes, errorNode) {
            if (iterationTypes === noIterationTypes)
                return noIterationTypes;