package minisat

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package minisat
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Module Minisat.LitSource

Sourcetype t = private int

Some representation of literals that will be accepted by minisat. NOTE the representation used by minisat is not based on sign but parity. Do not try to encode negative literals as negative integers.

Sourceval equal : t -> t -> bool
  • since 0.6
Sourceval compare : t -> t -> int
  • since 0.6
Sourceval hash : t -> int
  • since 0.6
Sourceval make : int -> t

make n creates the literal whose index is n. NOTE n must be strictly positive. Use neg to obtain the negation of a literal.

Sourceval neg : t -> t

Negation of a literal. Invariant: neg (neg x) = x

Sourceval abs : t -> t

Absolute value (removes negation if any).

Sourceval apply_sign : bool -> t -> t

apply_sign true lit is lit; apply_sign false lit is neg lit

  • since 0.6
Sourceval sign : t -> bool

Sign: true if the literal is positive, false for a negated literal. Invariants: sign (abs x) = true sign (neg x) = not (sign x)

Sourceval to_int : t -> int
Sourceval to_string : t -> string
Sourceval pp : t printer