expression.grm

define expression
        [arithExp]
    |   [compExp]
    |   [expression] [logicop] [compExp]
    |   [questionExp]
    |   [expression] 'is [id]
    |   [expression] 'as [id]
end define

define compExp
        [arithExp] [compop] [arithExp]
    |   [arithExp]
end define

define arithExp
        [term]
    |   [arithExp] [addop] [term]
end define

define term
        [primary]
    |   [term] [mulop] [primary]
    |   '! [term]
    |   [term] [selfaddop]
    |   [selfaddop] [term]
end define

define questionExp
    [expression] '? [expression] ': [expression]
end define

define addop
        '+
    |   '-
end define

define mulop
        '*
    |   '/
    |   '%
end define

define compop
        '==
    |   '!=
    |   '>=
    |   '<=
    |   '<
    |   '>
end define

define evalop
        '=
    |   '+=
    |   '-=
    |   '*=
    |   '/=
end define

define logicop
        '||
    |   '&&
    |   '&
    |   '|
end define

define selfaddop
        '++
    |   '--
end define