Qmake boolean operator precedence

[napajejenunedk0]

Could you guess the result?

Please, could someone give me the exact operator precedence table for qmake ( : = and, | = or )?

@
VAR_A =
VAR_B = B
VAR_C = C

!isEmpty( VAR_A ) | !isEmpty( VAR_B ) : !isEmpty( VAR_C ) {
message( 1 )
}

VAR_D = D

!isEmpty( VAR_A ) : !isEmpty( VAR_B ) | !isEmpty( VAR_C ) : !isEmpty( VAR_D ) {
message( 2 )
}
@