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Add left indent support for statements 

This aligns left indent style `let` statements with their expression
form.
pull/66/head
Evan Rutledge Borden 2017-11-19 15:09:29 -05:00 committed by Lennart Spitzner
parent de5f0401f3
commit a13a137f68
1 changed files with 13 additions and 9 deletions
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22
src/Language/Haskell/Brittany/Internal/Layouters/Stmt.hs
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@ -11,6 +11,7 @@ where
import Language.Haskell.Brittany.Internal.Types
import Language.Haskell.Brittany.Internal.LayouterBasics
import Language.Haskell.Brittany.Internal.Config.Types
import RdrName ( RdrName(..) )
import GHC ( runGhc, GenLocated(L), moduleNameString )
@ -27,6 +28,7 @@ import {-# SOURCE #-} Language.Haskell.Brittany.Internal.Layouters.Expr
layoutStmt :: ToBriDoc' (StmtLR RdrName RdrName (LHsExpr RdrName))
layoutStmt lstmt@(L _ stmt) = do
indentPolicy <- mAsk <&> _conf_layout .> _lconfig_indentPolicy .> confUnpack
docWrapNode lstmt $ case stmt of
LastStmt body False _ -> do
layoutExpr body
@ -62,15 +64,17 @@ layoutStmt lstmt@(L _ stmt) = do
(docLit $ Text.pack "let")
(docSetBaseAndIndent $ return bindDoc)
]
Just bindDocs -> docAlt
[ docSeq
[ appSep $ docLit $ Text.pack "let"
, docSetBaseAndIndent $ docLines $ return <$> bindDocs
]
, docAddBaseY BrIndentRegular $ docPar
(docLit $ Text.pack "let")
(docSetBaseAndIndent $ docLines $ return <$> bindDocs)
]
Just bindDocs ->
let letSeq = docSeq
[ appSep $ docLit $ Text.pack "let"
, docSetBaseAndIndent $ docLines $ return <$> bindDocs
]
letRegular = docAddBaseY BrIndentRegular $ docPar
(docLit $ Text.pack "let")
(docSetBaseAndIndent $ docLines $ return <$> bindDocs)
in case indentPolicy of
IndentPolicyLeft -> docAlt [letRegular]
_ -> docAlt [letSeq, letRegular]
RecStmt stmts _ _ _ _ _ _ _ _ _ -> do
docSeq
[ docLit (Text.pack "rec")