Function isUnambiguouslyStartOfFunctionType

test/fixtures/snapshot/typescript.js:34218–34245

()

            return false;
        }
        function isUnambiguouslyStartOfFunctionType() {
            nextToken();
            if (token() === 21 /* SyntaxKind.CloseParenToken */ || token() === 25 /* SyntaxKind.DotDotDotToken */) {
                // ( )
                // ( ...
                return true;
            }
            if (skipParameterStart()) {
                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
                // now see if we have something that indicates a parameter declaration
                if (token() === 58 /* SyntaxKind.ColonToken */ || token() === 27 /* SyntaxKind.CommaToken */ ||
                    token() === 57 /* SyntaxKind.QuestionToken */ || token() === 63 /* SyntaxKind.EqualsToken */) {
                    // ( xxx :
                    // ( xxx ,
                    // ( xxx ?
                    // ( xxx =
                    return true;
                }
                if (token() === 21 /* SyntaxKind.CloseParenToken */) {
                    nextToken();
                    if (token() === 38 /* SyntaxKind.EqualsGreaterThanToken */) {
                        // ( xxx ) =>
                        return true;
                    }
                }
            }
            return false;
        }
        function parseTypeOrTypePredicate() {
            var pos = getNodePos();
            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);