40 lines
1.2 KiB
OCaml
40 lines
1.2 KiB
OCaml
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(* Identifiers (unique names) *)
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type t
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val new: string -> t
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val new_persistent: string -> t
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val name: t -> string
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val persistent: t -> bool
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val equal: t -> t -> bool
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(* Compare identifiers by name. *)
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val same: t -> t -> bool
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(* Compare identifiers by binding location.
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Two identifiers are the same either if they are both
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non-persistent and have been created by the same call to
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[new], or if they are both persistent and have the same
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name. *)
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val identify: t -> t -> (unit -> 'a) -> 'a
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(* [identify id1 id2 f] temporarily makes [id1] and [id2] the same
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during the evaluation of [f ()]. *)
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val hide: t -> t
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(* Return an identifier with same name as the given identifier,
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but stamp different from any stamp returns by new.
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When put in a 'a tbl, this identifier can only be looked
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up by name. *)
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val make_global: t -> unit
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val global: t -> bool
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val print: t -> unit
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type 'a tbl
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(* Association tables from identifiers to type 'a. *)
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val empty: 'a tbl
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val add: t -> 'a -> 'a tbl -> 'a tbl
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val find_same: t -> 'a tbl -> 'a
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val find_name: string -> 'a tbl -> 'a
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val print_tbl: ('a -> unit) -> 'a tbl -> unit
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