how can I test a bit in a arrow

[kik1kou]

hello,

I would test a bit in a buffer of arrow
I have a buffer of 8 bytes

for exemple:
buffer var byte[8]

buffer[0] = %11110000
buffer[1] = %10011010
...

if buffer[1].2 == 1 then ... 'test bit 2 of buffer[1]

(the value is just an exemple)
but "buffer[1].2" don't work and return an error

ERROR Line 93: This style array syntax not supported, (test.pbp)

how can I test a bit in a arrow?