my $inlinetag = do {
        our $acc =
        qr/(?> \{          (?: (?> \\. | [^\\{}]+ | (??{ $acc }) ) )*   \} )/x;
        qr/    \{ (\w+): ( (?: (?> \\. | [^\\{}]+ | (??{ $acc }) ) )* ) \}  /x;
    };