{- |

Module : $Header$

Description : Abstract syntax for common logic

Copyright : (c) Karl Luc, DFKI Bremen 2010

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.tx

Maintainer : kluc@informatik.uni-bremen.de

Stability : provisional

Portability : portable

Definition of abstract syntax for common logic

-}

{-

Ref.

ISO/IEC IS 24707:2007(E)

-}

module CommonLogic.AS_CommonLogic where

import Common.Id as Id

import Common.Doc

import Common.DocUtils

import Common.Keywords

data TEXT = Text [PHRASE] Id.Range

deriving (Show, Ord, Eq)

data PHRASE = Module MODULE Id.Range

| Sentence SENTENCE Id.Range

| Importation IMPORTATION Id.Range

| Comment_Text TEXT COMMENT Id.Range

deriving (Show, Ord, Eq)

data COMMENT = Comment String Id.Range

deriving (Show, Ord, Eq)

data MODULE = Mod NAME [NAME] TEXT Id.Range

deriving (Show, Ord, Eq)

data IMPORTATION = Imp_name NAME Id.Range

deriving (Show, Ord, Eq)

data SENTENCE = Quant_sent QUANT_SENT Id.Range

| Bool_sent BOOL_SENT Id.Range

| Atom_sent ATOM Id.Range

| Comment_sent SENTENCE COMMENT Id.Range

| Irregular_sent Id.Range

deriving (Show, Ord, Eq)

data QUANT_SENT = Universal [BINDING_SEQ] SENTENCE Id.Range

| Existential [BINDING_SEQ] SENTENCE Id.Range

deriving (Show, Ord, Eq)

data BINDING_SEQ = B_name NAME Id.Range

| B_seqmark SEQ_MARK Id.Range

deriving (Show, Ord, Eq)

data BOOL_SENT = Conjunction [SENTENCE] Id.Range

| Disjunction [SENTENCE] Id.Range

| Negation SENTENCE Id.Range

| Implication SENTENCE SENTENCE Id.Range

| Biconditional SENTENCE SENTENCE Id.Range

deriving (Show, Ord, Eq)

data ATOM = Equation TERM TERM Id.Range

| Atom TERM TERM_SEQ Id.Range

deriving (Show, Ord, Eq)

data TERM = Name NAME Id.Range

| Funct_term TERM TERM_SEQ Id.Range

| Comment_term TERM COMMENT Id.Range

deriving (Show, Ord, Eq)

data TERM_SEQ = Term_seq [TERM] Id.Range

| Seq_marks [SEQ_MARK] Id.Range

deriving (Show, Ord, Eq)

type NAME = Id.Token

type SEQ_MARK = Id.Token

{-

newtype NAME = Name Id.Token

deriving (Show, Eq)

newtype SEQ_MARK = SeqMark Id.Token

deriving (Show, Eq)

-}

-- pretty printing using CLIF

instance Pretty SENTENCE where

pretty = printSentence

instance Pretty BOOL_SENT where

pretty = printBoolSent

instance Pretty QUANT_SENT where

pretty = printQuantSent

instance Pretty ATOM where

pretty = printAtom

instance Pretty TERM where

pretty = printTerm

instance Pretty TERM_SEQ where

pretty = printTermSeq

printSentence :: SENTENCE -> Doc

printSentence s = case s of

Quant_sent b _ -> br $ printQuantSent b

Bool_sent b _ -> br $ printBoolSent b

Atom_sent b _ -> printAtom b

Comment_sent _ _ _ -> text falseS -- opt.

Irregular_sent _ -> text falseS -- opt.

printQuantSent :: QUANT_SENT -> Doc

printQuantSent s = case s of

Universal a b _ -> text forallS <+> br (sep $ map printBindingSeq a)<+> printSentence b

Existential a b _ -> text existsS <+> br (sep $ map printBindingSeq a) <+> printSentence b

printBindingSeq :: BINDING_SEQ -> Doc

printBindingSeq s = case s of

B_name a _ -> printName a

B_seqmark a _ -> printSeqMark a

printBoolSent :: BOOL_SENT -> Doc

printBoolSent s = case s of

Conjunction a _ -> text andS <+> (sep $ map printSentence a)

Disjunction a _ -> text orS <+> (sep $ map printSentence a)

Negation a _ -> text notS <+> printSentence a

Implication a b _ -> text ifS <+> printSentence a <+> printSentence b

Biconditional a b _ -> text iffS <+> printSentence a <+> printSentence b

printAtom :: ATOM -> Doc

printAtom s = case s of

Equation a b _ -> br $ equals <+> printTerm a <+> printTerm b

Atom t ts _ -> br $ printTerm t <+> printTermSeq ts

printTerm :: TERM -> Doc

printTerm s = case s of

Name a _ -> printName a

Funct_term _ _ _ -> text ""

Comment_term _ _ _ -> text "" -- opt.

printTermSeq :: TERM_SEQ -> Doc

printTermSeq s = case s of

Term_seq t _ -> fsep $ map printTerm t

Seq_marks m _ -> fsep $ map printSeqMark m

printName :: NAME -> Doc

printName n = text $ tokStr n

printSeqMark :: SEQ_MARK -> Doc

printSeqMark m = text seqmark <> text (tokStr m)

-- parent

br :: Doc -> Doc

br a = lparen <> a <> rparen

-- keywords, reservednames in CLIF

seqmark :: String

seqmark = "..."

(...) :: String

(...) = "..."

orS :: String

orS = "or"

iffS :: String

iffS = "iff"