1 parse_as_prefix "Not";;
2 parse_as_infix("&&",(16,"right"));;
3 parse_as_infix("||",(15,"right"));;
4 parse_as_infix("-->",(14,"right"));;
5 parse_as_infix("<->",(13,"right"));;
7 let false_def = define `False = \t:num. F`;;
8 let true_def = define `True = \t:num. T`;;
9 let not_def = define `Not p = \t:num. ~(p t)`;;
10 let and_def = define `p && q = \t:num. p t /\ q t`;;
11 let or_def = define `p || q = \t:num. p t \/ q t`;;
12 let imp_def = define `p --> q = \t:num. p t ==> q t`;;
13 let iff_def = define `p <-> q = \t:num. p t <=> q t`;;
15 let forever = define `forever p = \t:num. !t'. t <= t' ==> p t'`;;
16 let sometime = define `sometime p = \t:num. ?t'. t <= t' /\ p t'`;;
18 let next = define `next p = \t:num. p(t + 1)`;;
20 parse_as_infix("until",(17,"right"));;
24 \t:num. ?t'. t <= t' /\ (!t''. t <= t'' /\ t'' < t' ==> p t'') /\ q t'`;;