36 lines
1.0 KiB
Haskell
36 lines
1.0 KiB
Haskell
{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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module Nix.Context where
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import Nix.Options
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import Nix.Scope
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import Nix.Frames
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import Nix.Utils
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import Nix.Expr.Types.Annotated ( SrcSpan
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, nullSpan
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)
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data Context m t = Context
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{ scopes :: Scopes m t
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, source :: SrcSpan
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, frames :: Frames
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, options :: Options
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}
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instance Has (Context m t) (Scopes m t) where
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hasLens f (Context x y z w) = (\x' -> Context x' y z w) <$> f x
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instance Has (Context m t) SrcSpan where
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hasLens f (Context x y z w) = (\y' -> Context x y' z w) <$> f y
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instance Has (Context m t) Frames where
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hasLens f (Context x y z w) = (\z' -> Context x y z' w) <$> f z
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instance Has (Context m t) Options where
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hasLens f (Context x y z w) = (\w' -> Context x y z w') <$> f w
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newContext :: Options -> Context m t
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newContext = Context emptyScopes nullSpan []
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