18 lines
617 B
OCaml
18 lines
617 B
OCaml
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type term =
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Var of int
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| Term of string * term list
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val union: 'a list -> 'a list -> 'a list
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val vars: term -> int list
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val vars_of_list: term list -> int list
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val substitute: (int * term) list -> term -> term
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val replace: term -> int list -> term -> term
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val replace_nth: int -> term list -> int list -> term -> term list
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val matching: term -> term -> (int * term) list
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val compsubst: (int * term) list -> (int * term) list -> (int * term) list
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val occurs: int -> term -> bool
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val unify: term -> term -> (int * term) list
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val infixes: string list
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val pretty_term: term -> unit
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val pretty_close: term -> unit
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