author | blanchet |
Fri, 17 Sep 2010 01:56:19 +0200 | |
changeset 39501 | aaa7078fff55 |
parent 39444 | beabb8443ee4 |
child 39502 | cffceed8e7fa |
permissions | -rw-r--r-- |
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(* ========================================================================= *) |
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(* FIRST ORDER LOGIC TERMS *) |
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39501
aaa7078fff55
updated source files with Metis 2.3 (timestamp: 16 Sept. 2010)
blanchet
parents:
39444
diff
changeset
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(* Copyright (c) 2001 Joe Hurd, distributed under the MIT license *) |
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(* ========================================================================= *) |
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signature Term = |
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sig |
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(* ------------------------------------------------------------------------- *) |
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(* A type of first order logic terms. *) |
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(* ------------------------------------------------------------------------- *) |
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type var = Name.name |
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type functionName = Name.name |
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type function = functionName * int |
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type const = functionName |
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datatype term = |
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Var of var |
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| Fn of functionName * term list |
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(* ------------------------------------------------------------------------- *) |
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(* Constructors and destructors. *) |
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(* ------------------------------------------------------------------------- *) |
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(* Variables *) |
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val destVar : term -> var |
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val isVar : term -> bool |
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val equalVar : var -> term -> bool |
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(* Functions *) |
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val destFn : term -> functionName * term list |
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val isFn : term -> bool |
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val fnName : term -> functionName |
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val fnArguments : term -> term list |
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val fnArity : term -> int |
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val fnFunction : term -> function |
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val functions : term -> NameAritySet.set |
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val functionNames : term -> NameSet.set |
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(* Constants *) |
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val mkConst : const -> term |
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val destConst : term -> const |
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val isConst : term -> bool |
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(* Binary functions *) |
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val mkBinop : functionName -> term * term -> term |
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val destBinop : functionName -> term -> term * term |
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val isBinop : functionName -> term -> bool |
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(* ------------------------------------------------------------------------- *) |
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(* The size of a term in symbols. *) |
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(* ------------------------------------------------------------------------- *) |
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val symbols : term -> int |
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(* ------------------------------------------------------------------------- *) |
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(* A total comparison function for terms. *) |
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(* ------------------------------------------------------------------------- *) |
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val compare : term * term -> order |
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val equal : term -> term -> bool |
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(* ------------------------------------------------------------------------- *) |
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(* Subterms. *) |
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(* ------------------------------------------------------------------------- *) |
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type path = int list |
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val subterm : term -> path -> term |
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val subterms : term -> (path * term) list |
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val replace : term -> path * term -> term |
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val find : (term -> bool) -> term -> path option |
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val ppPath : path Print.pp |
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val pathToString : path -> string |
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(* ------------------------------------------------------------------------- *) |
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(* Free variables. *) |
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(* ------------------------------------------------------------------------- *) |
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val freeIn : var -> term -> bool |
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val freeVars : term -> NameSet.set |
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val freeVarsList : term list -> NameSet.set |
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(* ------------------------------------------------------------------------- *) |
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(* Fresh variables. *) |
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(* ------------------------------------------------------------------------- *) |
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val newVar : unit -> term |
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val newVars : int -> term list |
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val variantPrime : NameSet.set -> var -> var |
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val variantNum : NameSet.set -> var -> var |
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(* ------------------------------------------------------------------------- *) |
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(* Special support for terms with type annotations. *) |
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(* ------------------------------------------------------------------------- *) |
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val hasTypeFunctionName : functionName |
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val hasTypeFunction : function |
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val isTypedVar : term -> bool |
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val typedSymbols : term -> int |
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val nonVarTypedSubterms : term -> (path * term) list |
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(* ------------------------------------------------------------------------- *) |
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(* Special support for terms with an explicit function application operator. *) |
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(* ------------------------------------------------------------------------- *) |
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val appName : Name.name |
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val mkApp : term * term -> term |
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val destApp : term -> term * term |
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val isApp : term -> bool |
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val listMkApp : term * term list -> term |
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val stripApp : term -> term * term list |
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(* ------------------------------------------------------------------------- *) |
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(* Parsing and pretty printing. *) |
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(* ------------------------------------------------------------------------- *) |
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(* Infix symbols *) |
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val infixes : Print.infixes ref |
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(* The negation symbol *) |
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val negation : string ref |
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(* Binder symbols *) |
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val binders : string list ref |
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(* Bracket symbols *) |
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val brackets : (string * string) list ref |
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(* Pretty printing *) |
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val pp : term Print.pp |
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val toString : term -> string |
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(* Parsing *) |
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val fromString : string -> term |
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val parse : term Parse.quotation -> term |
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end |