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|
(* $Id$ *)
open Pcoq
open Command
GEXTEND Gram
pattern_list:
[ [ -> []
| p = pattern; pl = pattern_list -> p :: pl ] ]
;
lsimple_pattern:
[ [ c = simple_pattern2 -> c ] ]
;
simple_pattern:
[ [ id = ident -> id
| "("; p = lsimple_pattern; ")" -> p ] ]
;
simple_pattern_list:
[ [ -> []
| p = simple_pattern; pl = simple_pattern_list ->
p :: pl ] ]
;
(* The XTRA"!" means we want to override the implicit arg mecanism of bdize,
since params are not given in patterns *)
simple_pattern2:
[ [ p = simple_pattern; lp = pattern_list ->
<:ast< (PATTCONSTRUCT $p ($LIST $lp)) >>
| p = simple_pattern; "as"; id = ident -> <:ast< (PATTAS $id $p) >>
| c1 = simple_pattern; ","; c2 = simple_pattern ->
<:ast< (PATTCONSTRUCT pair $c1 $c2) >> ] ]
;
pattern:
[ [ p = simple_pattern -> p ] ]
;
ne_pattern_list:
[ [ c1 = pattern; cl = ne_pattern_list -> c1 :: cl
| c1 = pattern -> [c1] ] ]
;
equation:
[ [ lhs = ne_pattern_list; "=>"; rhs = command ->
<:ast< (EQN $rhs ($LIST $lhs)) >> ] ]
;
ne_eqn_list:
[ [ e = equation; "|"; leqn = ne_eqn_list -> e :: leqn
| e = equation -> [e] ] ]
;
command1:
[ [ "<"; l1 = lcommand; ">"; "Cases"; lc = ne_command_list; "of";
OPT "|"; eqs = ne_eqn_list; "end" ->
<:ast< (MULTCASE $l1 (TOMATCH ($LIST $lc)) ($LIST $eqs)) >>
| "Cases"; lc = ne_command_list; "of";
OPT "|"; eqs = ne_eqn_list; "end" ->
<:ast< (MULTCASE "SYNTH" (TOMATCH ($LIST $lc)) ($LIST $eqs)) >>
| "<"; l1 = lcommand; ">"; "Cases"; lc = ne_command_list; "of";
"end" ->
<:ast< (MULTCASE $l1 (TOMATCH ($LIST $lc))) >>
| "Cases"; lc = ne_command_list; "of"; "end" ->
<:ast< (MULTCASE "SYNTH" (TOMATCH ($LIST $lc))) >> ] ]
;
END;
|
