package lambdapi
Symbols and signature for unification rules.
This module provides a signature to be used to handle unification rules. The signature is not attached to any real lambdapi file and is henceforth qualified to be a "ghost" signature.
val path : Common.Path.tPath of signature containing unificaton rules symbols.
val sign : Sign.tGhost signature holding the symbols used in unification rules.
- All signatures depend on it (dependency set in
Sig_state.create_sign). - All signatures open it (opened in
Sig_state.of_sign). - It is automatically loaded.
val equiv : Term.symSymbol of name LpLexer.equiv, with infix notation.
val cons : Term.symSymbol of name LpLexer.cons, with infix right notation with priority < LpLexer.equiv.
unpack eqs transforms a term of the form cons (equiv t u) (cons (equiv v w) ...) into a list [(t,u); (v,w); ...].
val is_ghost : Term.sym -> boolis_ghost s is true iff s is a symbol of the ghost signature.