Function tryReparseOptionalChain

test/fixtures/snapshot/typescript.js:35466–35486

(node)

                && lookAhead(nextTokenIsIdentifierOrKeywordOrOpenBracketOrTemplate);
        }
        function tryReparseOptionalChain(node) {
            if (node.flags & 32 /* NodeFlags.OptionalChain */) {
                return true;
            }
            // check for an optional chain in a non-null expression
            if (ts.isNonNullExpression(node)) {
                var expr = node.expression;
                while (ts.isNonNullExpression(expr) && !(expr.flags & 32 /* NodeFlags.OptionalChain */)) {
                    expr = expr.expression;
                }
                if (expr.flags & 32 /* NodeFlags.OptionalChain */) {
                    // this is part of an optional chain. Walk down from `node` to `expression` and set the flag.
                    while (ts.isNonNullExpression(node)) {
                        node.flags |= 32 /* NodeFlags.OptionalChain */;
                        node = node.expression;
                    }
                    return true;
                }
            }
            return false;
        }
        function parsePropertyAccessExpressionRest(pos, expression, questionDotToken) {
            var name = parseRightSideOfDot(/*allowIdentifierNames*/ true, /*allowPrivateIdentifiers*/ true);
            var isOptionalChain = questionDotToken || tryReparseOptionalChain(expression);