blob: 488f900e5b42a3b6f9c5967facacd9318c8f01b9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*s Syntax for arithmetic *)
Require Export Params.
Require Export NeqDef.
Infix 6 "<" lt.
Infix 6 "<=" le.
Infix 6 ">" gt.
Infix 6 ">=" ge.
Infix 6 "<>" neq.
(*i Infix 6 "=" eq. i*)
Grammar constr constr1 :=
eq_impl [ constr0($c) "=" constr0($c2) ] -> [ (eq $c $c2) ].
(*i Infix 7 "+" plus. i*)
Grammar constr lassoc_constr4 :=
squash_sum
[ lassoc_constr4($c1) "+" lassoc_constr4($c2) ] ->
case [$c2] of
(SQUASH $T2) ->
case [$c1] of
(SQUASH $T1) -> [ (sumbool $T1 $T2) ] (* {T1}+{T2} *)
| $_ -> [ (sumor $c1 $T2) ] (* c1+{T2} *)
esac
| $_ -> [ (add $c1 $c2) ] (* c1+c2 *)
esac.
Syntax constr
level 1:
equal [ (eq $t1 $t2) ] -> [ [<hov 0> $t1:E [0 1] "=" $t2:E ] ]
;
level 4:
sum [ (add $t1 $t2) ] -> [ [<hov 0> $t1:E [0 1] "+" $t2:L ] ]
.
|
