EEL discussion

pattern TOP {
    | <hot> {} <dry($<hot><area>)>
    | <dry> {} <hot($<dry><area>)>
}

method hot($area?) {
    do given await $.next-event {
        .<type> eq "temperature"
        && .<value> > 40
        && (
            $area
            ?? .<area> eq $area
            !! .<area>.defined
        )
    }
}

method dry($area?) {
    do given await $.next-event {
        .<type> eq "humidity"
        && .<value> < 20
        && (
            $area
            ?? .<area> eq $area
            !! .<area>.defined
        )
    }
}