{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE Strict            #-}
module Language.Cimple.Diagnostics
  ( Diagnostics
  , HasDiagnostics (..)
  , warn
  , sloc
  ) where

import           Control.Monad.State.Strict  (State)
import qualified Control.Monad.State.Strict  as State
import           Data.Text                   (Text)
import           Language.Cimple.DescribeAst (HasLocation (..))

type DiagnosticsT diags a = State diags a
type Diagnostics a = DiagnosticsT [Text] a

warn
    :: (HasLocation at, HasDiagnostics diags)
    => FilePath -> at -> Text -> DiagnosticsT diags ()
warn :: FilePath -> at -> Text -> DiagnosticsT diags ()
warn FilePath
file at
l Text
w = (diags -> diags) -> DiagnosticsT diags ()
forall s (m :: * -> *). MonadState s m => (s -> s) -> m ()
State.modify (Text -> diags -> diags
forall a. HasDiagnostics a => Text -> a -> a
addDiagnostic (Text -> diags -> diags) -> Text -> diags -> diags
forall a b. (a -> b) -> a -> b
$ FilePath -> at -> Text
forall a. HasLocation a => FilePath -> a -> Text
sloc FilePath
file at
l Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
": " Text -> Text -> Text
forall a. Semigroup a => a -> a -> a
<> Text
w)


class HasDiagnostics a where
    addDiagnostic :: Text -> a -> a

instance HasDiagnostics [Text] where
    addDiagnostic :: Text -> [Text] -> [Text]
addDiagnostic = (:)