Function getTypeOfExpression

test/fixtures/snapshot/typescript.js:79780–79802

* Returns the type of an expression. Unlike checkExpression, this function is simply concerned * with computing the type and may not fully check all contained sub-expressions for errors.

(node)

         * with computing the type and may not fully check all contained sub-expressions for errors.
         */
        function getTypeOfExpression(node) {
            // Don't bother caching types that require no flow analysis and are quick to compute.
            var quickType = getQuickTypeOfExpression(node);
            if (quickType) {
                return quickType;
            }
            // If a type has been cached for the node, return it.
            if (node.flags & 134217728 /* NodeFlags.TypeCached */ && flowTypeCache) {
                var cachedType = flowTypeCache[getNodeId(node)];
                if (cachedType) {
                    return cachedType;
                }
            }
            var startInvocationCount = flowInvocationCount;
            var type = checkExpression(node);
            // If control flow analysis was required to determine the type, it is worth caching.
            if (flowInvocationCount !== startInvocationCount) {
                var cache = flowTypeCache || (flowTypeCache = []);
                cache[getNodeId(node)] = type;
                ts.setNodeFlags(node, node.flags | 134217728 /* NodeFlags.TypeCached */);
            }
            return type;
        }
        function getQuickTypeOfExpression(node) {
            var expr = ts.skipParentheses(node, /*excludeJSDocTypeAssertions*/ true);
            if (ts.isJSDocTypeAssertion(expr)) {