type ntactic =
| NApply of loc * CicNotationPt.term
+ | NAssert of loc * (string * [`Decl of CicNotationPt.term | `Def of CicNotationPt.term * CicNotationPt.term]) list * CicNotationPt.term
| NCases of loc * CicNotationPt.term * npattern
| NCase1 of loc * string
| NChange of loc * npattern * CicNotationPt.term