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(* $Id$ *)
Require Export Datatypes.
(* Parsing of things in Datatypes.v *)
Grammar constr constr1 :=
pair_expl [ "<" lconstr($l1) "," lconstr($c2) ">" "(" lconstr($c3) ","
lconstr($c4) ")" ] -> [<<(pair $l1 $c2 $c3 $c4)>>]
| fst_expl [ "<" lconstr($l1) "," lconstr($c2) ">" "Fst" "("
lconstr($l) ")" ] -> [<<(fst $l1 $c2 $l)>>]
| snd_expl [ "<" lconstr($l1) "," lconstr($c2) ">" "Snd" "("
lconstr($l) ")" ] -> [<<(snd $l1 $c2 $l)>>]
with constr0 :=
pair [ "(" lconstr($lc1) "," lconstr($lc2) ")" ] ->
[<<(pair ? ? $lc1 $lc2)>>]
with constr3 :=
prod [ constr2($c1) "*" constr3($c2) ] -> [<<(prod $c1 $c2)>>].
(* Pretty-printing of things in Datatypes.v *)
Syntax constr
level 4:
sum [<<(sum $t1 $t2)>>] -> [ [<hov 0> $t1:E [0 1] "+" $t2:L ] ]
;
level 3:
product [<<(prod $t1 $t2)>>] -> [ [<hov 0> $t1:L [0 1] "*" $t2:E ] ]
;
level 1:
pair
[<<(pair $_ $_ $t3 $t4)>>] -> [ [<hov 0> "(" $t3:E ","[0 1] $t4:E ")" ] ]
| fst_imp [<<(fst $_ $_ $t2)>>] -> [ [<hov 0> "(Fst " $t2:E ")"] ]
| snd_imp [<<(snd $_ $_ $t2)>>] -> [ [<hov 0> "(Snd " $t2:E ")"] ].
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