module Slp3 {

-- Straight Line Programs from MC
-- With user defined field names
-- With sequence
-- With raw products, atributes and options

pos = (string? file,int line, int offset)

stm = Compound(stm head,stm next)
    | Assign(identifier id,exp exp) 
    | Print(exp*)
     attributes (pos p,int? value)

-- Values are optional so that a parser can ignore them
-- but an evaluator can use them to record the value of each
-- sub-expression

exp = Id(identifier id)
    | Num(int v)
    | Op(exp lexp,binop,exp rexp)
     attributes (pos p,int? value)	

binop = Plus | Minus | Times | Div

}