034c92a64c
and Making name, type_variable, built-in, constructor, label and string uncompatible types in ligo (weird bug with types in ligodity)
46 lines
1.6 KiB
OCaml
46 lines
1.6 KiB
OCaml
(* Currently, Var.t is equivalent to (string * int option). The
|
|
optional counter value is present on variables generated with
|
|
`fresh`.
|
|
|
|
The intent is that there are two disjoint classes of variables:
|
|
'user variables' (embedded with `of_name`) and 'generated
|
|
variables' (generated with `fresh`.)
|
|
|
|
Vars with indices are printed as %s#%d. This could be confusing if
|
|
vars like `name_of "foo#121"` are allowed -- `name_of "foo#121"`
|
|
will be _not equal_ to a generated var `fresh ~name:"foo"` with
|
|
counter 121, despite being printed the same way.
|
|
|
|
This module does not prevent that confusion. But, the LIGO lexer
|
|
does not accept names like "foo#121" as possible variable names, so
|
|
this confusion should not arise for us. *)
|
|
|
|
type 'a t
|
|
|
|
val equal : 'a t -> 'a t -> bool
|
|
val compare : 'a t -> 'a t -> int
|
|
|
|
(* Prints vars as %s or %s#%d *)
|
|
val pp : Format.formatter -> 'a t -> unit
|
|
|
|
(* Construct a user variable directly from a string. This should only
|
|
be used for embedding user variable names. For programmatically
|
|
generated variables, use `fresh`. Take care not to cause
|
|
shadowing/capture except as the user intended. *)
|
|
val of_name : string -> 'a t
|
|
|
|
(* TODO don't use this, this should not exist. *)
|
|
val to_name : 'a t -> string
|
|
|
|
(* Generate a variable, using a counter value from a _global_
|
|
counter. If the name is not provided, it will be empty. *)
|
|
val fresh : ?name:string -> unit -> 'a t
|
|
|
|
(* Generate a variable as with `fresh`, reusing the name part of the
|
|
given variable. *)
|
|
val fresh_like : 'a t -> 'a t
|
|
|
|
(* Reset the global counter. Danger, do not use... Provided for tests
|
|
only. *)
|
|
val reset_counter : unit -> unit
|