{- |

Module : $Header$

Description : symbols for CSL

Copyright : (c) Dominik Dietrich, DFKI Bremen 2010

License : GPLv2 or higher, see LICENSE.txt

Maintainer : dominik.dietrich@dfki.de

Stability : experimental

Portability : portable

-}

module CSL.Symbol where

import Common.Id

import Common.Doc

import Common.DocUtils

import qualified Data.Set as Set

import qualified Data.Map as Map

import CSL.Sign

import CSL.Morphism

-- | Datatype for symbols

newtype Symbol = Symbol {symName :: Id}

deriving (Show, Eq, Ord)

instance GetRange Symbol where

getRange = getRange . symName

instance Pretty Symbol where

pretty = printSymbol

printSymbol :: Symbol -> Doc

printSymbol x = pretty $ symName x

-- | Extraction of symbols from a signature

symOf :: Sign -> Set.Set Symbol

symOf = Set.map Symbol . Map.keysSet . items

-- | Determines the symbol map of a morhpism

getSymbolMap :: Morphism -> Map.Map Symbol Symbol

getSymbolMap f =

Map.foldWithKey (\ x _ -> Map.insert (Symbol x) (Symbol $ applyMap (operatorMap f) x))

Map.empty $ items $ source f

-- | Determines the name of a symbol

getSymbolName :: Symbol -> Id

getSymbolName = symName

-- | make a raw_symbol

idToRaw :: Id -> Symbol

idToRaw mid = Symbol {symName = mid}

-- | convert to raw symbol

symbolToRaw :: Symbol -> Symbol

symbolToRaw = id

-- | does a smybol match a raw symbol?

matches :: Symbol -> Symbol -> Bool

matches s1 s2 = s1 == s2

-- | application function for Symbol Maps

applySymMap :: Map.Map Symbol Symbol -> Symbol -> Symbol

applySymMap smap idt = Map.findWithDefault idt idt smap