{- |

Module : $Header$

Copyright : (c) Sonja Groening, Christian Maeder, Uni Bremen 2004

Licence : similar to LGPL, see HetCATS/LICENCE.txt or LIZENZ.txt

Maintainer : hets@tzi.de

Stability : provisional

Portability : portable

utilities for the HasCASL to Isabelle comorphism

-}

module Isabelle.IsaConsts where

import Isabelle.IsaSign

-- | application

termAppl :: Term -> Term -> Term

termAppl t1 t2 = App t1 t2 NotCont

-- | apply binary operation to arguments

binConst :: String -> Term -> Term -> Term

binConst s t1 t2 = termAppl (termAppl (con s) t1) t2

-- | construct a constant

conT :: String -> Typ -> Term

conT s t = Const s t isaTerm

-- | construct a constant with no type

con :: String -> Term

con s = conT s noType

-- * some stuff

someS :: String

someS = "Some"

conSomeT :: Typ -> Term

conSomeT t = conT someS t

-- | some constant with no type

conSome :: Term

conSome = con someS

-- | defOp constant

defOp :: Term

defOp = con "defOp"

-- | not constant

notOp :: Term

notOp = con "Not"

-- * quantor strings

allS, exS, ex1S :: String

allS = "All"

exS = "Ex"

ex1S = "Ex1"

-- * strings of binary ops

conj :: String

conj = "op &"

disj :: String

disj = "op |"

impl :: String

impl = "op -->"

eqv :: String

eqv = "op <=>"

eq :: String

eq = "op ="

-- * binary junctors

binConj, binDisj, binImpl, binEqv, binEq :: Term -> Term -> Term

binConj= binConst conj

binDisj = binConst disj

binImpl = binConst impl

binEq = binConst eq

binEqv = binConst eqv

-- * boolean constants

true, false :: Term

true = con "True"

false = con "False"

-- | pair stuff

pairC :: String

pairC = "pair"

isaPair :: String

isaPair = "Pair"