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Evaluate.sml
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1997-08-18
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201 b
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[
TEXT/R*ch
]
local open Expr
in
fun eval (Cst n) = n
| eval (Neg e) = ~ (eval e)
| eval (Plus (e1, e2)) = eval e1 + eval e2;
fun test e = (eval e = eval (Reduce.reduce e))
end