{- |
     Author  : Kai-Oliver Prott
     Version : August 2018

     Datatypes for identifiers from the curry-frontend
-}
module Curry.Ident where

import Curry.SpanInfo

-- | Identifier for modules, from the curry-frontend.
data ModuleIdent = ModuleIdent SpanInfo [String]
  deriving (Show, Read)

instance Eq ModuleIdent where
  ModuleIdent _ ss1 == ModuleIdent _ ss2 = ss1 == ss2

instance Ord ModuleIdent where
  compare (ModuleIdent _ ss1) (ModuleIdent _ ss2) = compare ss1 ss2

instance HasSpanInfo ModuleIdent where
    getSpanInfo     (ModuleIdent spi _ ) = spi
    setSpanInfo spi (ModuleIdent _   ss) = ModuleIdent spi ss

-- | Identifier, from the curry-frontend.
data Ident = Ident SpanInfo String Int
  deriving (Show, Read)

instance Eq Ident where
  Ident _ s1 id1 == Ident _ s2 id2 = (s1, id1) == (s2, id2)

instance Ord Ident where
  compare (Ident _ s1 id1) (Ident _ s2 id2) = compare (s1, id1) (s2, id2)

instance HasSpanInfo Ident where
  getSpanInfo     (Ident spi _ _  ) = spi
  setSpanInfo spi (Ident _   s idt) = Ident spi s idt

-- | Qualified identifier, from the curry-frontend.
data QualIdent = QualIdent SpanInfo (Maybe ModuleIdent) Ident
  deriving (Show, Read)

instance Eq QualIdent where
  QualIdent _ mid1 idt1 == QualIdent _ mid2 idt2 = (mid1, idt1) == (mid2, idt2)

instance Ord QualIdent where
  compare (QualIdent _ mid1 idt1) (QualIdent _ mid2 idt2) =
    compare (mid1, idt1) (mid2, idt2)

instance HasSpanInfo QualIdent where
  getSpanInfo     (QualIdent spi _   _  ) = spi
  setSpanInfo spi (QualIdent _   mid idt) = QualIdent spi mid idt