Function combineIterationTypes

test/fixtures/snapshot/typescript.js:83125–83145

* Combines multiple `IterationTypes` records. * * If `array` is empty or all elements are missing or are references to `noIterationTypes`, * then `noIterationTypes` is returned. Otherwise, an `IterationTypes` record is returned * for the combined iteration types.

(array)

         * for the combined iteration types.
         */
        function combineIterationTypes(array) {
            var yieldTypes;
            var returnTypes;
            var nextTypes;
            for (var _i = 0, array_11 = array; _i < array_11.length; _i++) {
                var iterationTypes = array_11[_i];
                if (iterationTypes === undefined || iterationTypes === noIterationTypes) {
                    continue;
                }
                if (iterationTypes === anyIterationTypes) {
                    return anyIterationTypes;
                }
                yieldTypes = ts.append(yieldTypes, iterationTypes.yieldType);
                returnTypes = ts.append(returnTypes, iterationTypes.returnType);
                nextTypes = ts.append(nextTypes, iterationTypes.nextType);
            }
            if (yieldTypes || returnTypes || nextTypes) {
                return createIterationTypes(yieldTypes && getUnionType(yieldTypes), returnTypes && getUnionType(returnTypes), nextTypes && getIntersectionType(nextTypes));
            }
            return noIterationTypes;
        }
        function getCachedIterationTypes(type, cacheKey) {
            return type[cacheKey];
        }