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package touist
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type var = string * t list optionand t = | Touist_code of t list| Int of int| Float of float| Bool of bool| Var of var| Set of AstSet.t| Set_decl of t list| Neg of t| Add of t * t| Sub of t * t| Mul of t * t| Div of t * t| Mod of t * t| Sqrt of t| To_int of t| To_float of t| Abs of t| Top| Bottom| Not of t| And of t * t| Or of t * t| Xor of t * t| Implies of t * t| Equiv of t * t| Equal of t * t| Not_equal of t * t| Lesser_than of t * t| Lesser_or_equal of t * t| Greater_than of t * t| Greater_or_equal of t * t| Union of t * t| Inter of t * t| Diff of t * t| Range of t * t| Empty of t| Card of t| Subset of t * t| Powerset of t| In of t * t| If of t * t * t| Exact of t * t| Atleast of t * t| Atmost of t * t| Bigand of t list * t list * t option * t| Bigor of t list * t list * t option * t| Let of t * t * t| Affect of t * t| UnexpProp of string * t list option(*UnexpPropis a proposition that contains unexpanded variables; we cannot tranformUnexpPropintoPropbefore knowing what is the content of the variables. Examples:abcd(1,$d,$i,a) <- not a full-string yet
*)| Prop of string(*Propcontains the actual proposition after the evaluation has been run. Example: if $d=foo and $i=123, then thePropis:abcd(1,foo,123,a) <- an actual string that represents an actual logical proposition*)| Loc of t * TouistErr.loc(*Locis a clever (or ugly, you pick) way of keeping the locations in the text of the Ast.t elements. In touistParser.mly, each production rule gives its location in the original text; for example, instead of simply returningInter (x,y)the parser will returnLoc (Inter (x,y), ($startpos,$endpos)).
*)Locis used in eval.ml when checking the types; it allows to give precise locations.| Paren of t(*
*)Parenkeeps track of the parenthesis in the AST in order to print latex| Exists of t * t| Forall of t * t| For of t * t * t| NewlineAfter of t| NewlineBefore of t