Function matchAsync

docs/assets/getting-started-assets/javascripts/JSXTransformer.js:5761–5772

()

                        }

                        function matchAsync() {
                            var backtrackToken = lookahead,
                                matches = false

                            if (matchContextualKeyword("async")) {
                                lex() // Make sure peekLineTerminator() starts after 'async'.
                                matches = !peekLineTerminator()
                                rewind(backtrackToken) // Revert the lex().
                            }

                            return matches
                        }

                        function matchAwait() {
                            return state.awaitAllowed && matchContextualKeyword("await")