@@ -1,43 +1,33 @@
1−{-# LANGUAGE LambdaCase #-}
1+{-# LANGUAGE LambdaCase #-}
2−{-# LANGUAGE MultiWayIf #-}
3{-# LANGUAGE OverloadedStrings #-}
2{-# LANGUAGE OverloadedStrings #-}
4−{-# LANGUAGE RecordWildCards #-}
3+{-# LANGUAGE RecordWildCards #-}
5−{-# LANGUAGE TypeApplications #-}
7module Ormolu.Printer.Meat.Declaration.Value
5module Ormolu.Printer.Meat.Declaration.Value
8− ( p_valDecl,
6+ ( p_valDecl
10− p_hsExpr,
8+ , p_hsExpr
11− p_hsSplice,
9+ , p_hsSplice
16import Bag (bagToList)
13import Bag (bagToList)
17import BasicTypes
14import BasicTypes
18import Control.Monad
15import Control.Monad
19−import Ctype (is_space)
20import Data.Bool (bool)
16import Data.Bool (bool)
21−import Data.Char (isPunctuation, isSymbol)
22import Data.Data hiding (Infix, Prefix)
17import Data.Data hiding (Infix, Prefix)
23−import Data.Functor ((<&>))
24import Data.List (intersperse, sortOn)
18import Data.List (intersperse, sortOn)
25−import Data.List.NonEmpty (NonEmpty (..), (<|))
26−import qualified Data.List.NonEmpty as NE
27import Data.Text (Text)
19import Data.Text (Text)
28−import qualified Data.Text as Text
30−import OccName (occNameString)
31import Ormolu.Printer.Combinators
21import Ormolu.Printer.Combinators
32−import Ormolu.Printer.Internal
33import Ormolu.Printer.Meat.Common
22import Ormolu.Printer.Meat.Common
34−import {-# SOURCE #-} Ormolu.Printer.Meat.Declaration
35import Ormolu.Printer.Meat.Declaration.Signature
23import Ormolu.Printer.Meat.Declaration.Signature
36import Ormolu.Printer.Meat.Type
24import Ormolu.Printer.Meat.Type
37−import Ormolu.Printer.Operators
38import Ormolu.Utils
25import Ormolu.Utils
26+import Outputable (Outputable (..))
27+import SrcLoc (combineSrcSpans, isOneLineSpan)
28+import qualified Data.List.NonEmpty as NE
29+import {-# SOURCE #-} Ormolu.Printer.Meat.Declaration
40−-- | Style of a group of equations.
41data MatchGroupStyle
31data MatchGroupStyle
42 = Function (Located RdrName)
32 = Function (Located RdrName)
43 | PatternBind
33 | PatternBind
@@ -45,132 +35,87 @@ data MatchGroupStyle
46 | LambdaCase
36 | LambdaCase
48−-- | Style of equations in a group.
49data GroupStyle
38data GroupStyle
50 = EqualSign
39 = EqualSign
51 | RightArrow
40 | RightArrow
53-- | Expression placement. This marks the places where expressions that
42-- | Expression placement. This marks the places where expressions that
54-- implement handing forms may use them.
43-- implement handing forms may use them.
55data Placement
45data Placement
56− = -- | Multi-line layout should cause
46+ = Normal -- ^ Multi-line layout should cause
57− -- insertion of a newline and indentation
47+ -- insertion of a newline and indentation
59− Normal
49+ | Hanging -- ^ Expressions that have hanging form
60− | -- | Expressions that have hanging form
50+ -- should use it and avoid bumping one level
61− -- should use it and avoid bumping one level
51+ -- of indentation
66p_valDecl :: HsBindLR GhcPs GhcPs -> R ()
53p_valDecl :: HsBindLR GhcPs GhcPs -> R ()
67−p_valDecl = \case
54+p_valDecl = line . p_valDecl'
68− FunBind NoExtField funId funMatches _ _ -> p_funBind funId funMatches
55+
69− PatBind NoExtField pat grhss _ -> p_match PatternBind False NoSrcStrict [pat] grhss
56+p_valDecl' :: HsBindLR GhcPs GhcPs -> R ()
58+ FunBind NoExt funId funMatches _ _ -> p_funBind funId funMatches
59+ PatBind NoExt pat grhss _ -> p_match PatternBind False NoSrcStrict [pat] grhss
70 VarBind {} -> notImplemented "VarBinds" -- introduced by the type checker
60 VarBind {} -> notImplemented "VarBinds" -- introduced by the type checker
71 AbsBinds {} -> notImplemented "AbsBinds" -- introduced by the type checker
61 AbsBinds {} -> notImplemented "AbsBinds" -- introduced by the type checker
72− PatSynBind NoExtField psb -> p_patSynBind psb
62+ PatSynBind NoExt psb -> p_patSynBind psb
73− XHsBindsLR x -> noExtCon x
63+ XHsBindsLR NoExt -> notImplemented "XHsBindsLR"
75−p_funBind ::
65+p_funBind
76− Located RdrName ->
66+ :: Located RdrName
77− MatchGroup GhcPs (LHsExpr GhcPs) ->
67+ -> MatchGroup GhcPs (LHsExpr GhcPs)
79−p_funBind name = p_matchGroup (Function name)
69+p_funBind name mgroup =
80−
70+ p_matchGroup (Function name) mgroup
82− MatchGroupStyle ->
72+p_matchGroup
83− MatchGroup GhcPs (LHsExpr GhcPs) ->
73+ :: MatchGroupStyle
84− R ()
74+ -> MatchGroup GhcPs (LHsExpr GhcPs)
85p_matchGroup = p_matchGroup' exprPlacement p_hsExpr
76p_matchGroup = p_matchGroup' exprPlacement p_hsExpr
87−p_matchGroup' ::
78+p_matchGroup'
88− Data body =>
79+ :: Data body
89− -- | How to get body placement
80+ => (body -> Placement)
90− (body -> Placement) ->
81+ -> (body -> R ())
91− -- | How to print body
82+ -> MatchGroupStyle
92− (body -> R ()) ->
83+ -> MatchGroup GhcPs (Located body)
93− -- | Style of this group of equations
84+ -> R ()
94− MatchGroupStyle ->
85+p_matchGroup' placer pretty style MG {..} =
95− -- | Match group
86+ locatedVia Nothing mg_alts $
96− MatchGroup GhcPs (Located body) ->
87+ newlineSep (located' (\m@Match {..} ->
97− R ()
88+ p_match' placer pretty style (isInfixMatch m) (matchStrictness m) m_pats m_grhss))
98−p_matchGroup' placer render style MG {..} = do
89+p_matchGroup' _ _ _ (XMatchGroup NoExt) = notImplemented "XMatchGroup"
99− let ob = case style of
103− -- Since we are forcing braces on 'sepSemi' based on 'ob', we have to
104− -- restore the brace state inside the sepsemi.
105− ub <- bool dontUseBraces useBraces <$> canUseBraces
106− ob $ sepSemi (located' (ub . p_Match)) (unLoc mg_alts)
108− p_Match m@Match {..} =
112− (adjustMatchGroupStyle m style)
117− p_Match (XMatch x) = noExtCon x
118−p_matchGroup' _ _ _ (XMatchGroup x) = noExtCon x
120−-- | Function id obtained through pattern matching on 'FunBind' should not
121−-- be used to print the actual equations because the different ‘RdrNames’
122−-- used in the equations may have different “decorations” (such as backticks
123−-- and paretheses) associated with them. It is necessary to use per-equation
124−-- names obtained from 'm_ctxt' of 'Match'. This function replaces function
125−-- name inside of 'Function' accordingly.
126−adjustMatchGroupStyle ::
130−adjustMatchGroupStyle m = \case
131− Function _ -> (Function . mc_fun . m_ctxt) m
134matchStrictness :: Match id body -> SrcStrictness
91matchStrictness :: Match id body -> SrcStrictness
135matchStrictness match =
92matchStrictness match =
136 case m_ctxt match of
93 case m_ctxt match of
137− FunRhs {mc_strictness = s} -> s
94+ FunRhs{mc_strictness=s} -> s
138 _ -> NoSrcStrict
95 _ -> NoSrcStrict
141− -- | Style of the group
98+ :: MatchGroupStyle
142− MatchGroupStyle ->
99+ -> Bool -- ^ Is this an infix match?
143− -- | Is this an infix match?
100+ -> SrcStrictness -- ^ Strictness prefix (FunBind)
144− Bool ->
101+ -> [LPat GhcPs]
145− -- | Strictness prefix (FunBind)
102+ -> GRHSs GhcPs (LHsExpr GhcPs)
146− SrcStrictness ->
103+ -> R ()
147− -- | Argument patterns
150− GRHSs GhcPs (LHsExpr GhcPs) ->
152p_match = p_match' exprPlacement p_hsExpr
104p_match = p_match' exprPlacement p_hsExpr
154−p_match' ::
106+p_match'
155− Data body =>
107+ :: Data body
156− -- | How to get body placement
108+ => (body -> Placement)
157− (body -> Placement) ->
109+ -> (body -> R ())
158− -- | How to print body
110+ -> MatchGroupStyle
159− (body -> R ()) ->
111+ -> Bool -- ^ Is this an infix match?
160− -- | Style of this group of equations
112+ -> SrcStrictness -- ^ Strictness prefix (FunBind)
161− MatchGroupStyle ->
113+ -> [LPat GhcPs]
162− -- | Is this an infix match?
114+ -> GRHSs GhcPs (Located body)
164− -- | Strictness prefix (FunBind)
116+p_match' placer pretty style isInfix strictness m_pats m_grhss = do
165− SrcStrictness ->
117+ -- NOTE Normally, since patterns may be placed in a multi-line layout, it
166− -- | Argument patterns
118+ -- is necessary to bump indentation for the pattern group so it's more
169− GRHSs GhcPs (Located body) ->
171−p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
172− -- Normally, since patterns may be placed in a multi-line layout, it is
173− -- necessary to bump indentation for the pattern group so it's more
174 -- indented than function name. This in turn means that indentation for
119 -- indented than function name. This in turn means that indentation for
175 -- the body should also be bumped. Normally this would mean that bodies
120 -- the body should also be bumped. Normally this would mean that bodies
176 -- would start with two indentation steps applied, which is ugly, so we
121 -- would start with two indentation steps applied, which is ugly, so we
@@ -180,24 +125,23 @@ p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
180 NoSrcStrict -> return ()
125 NoSrcStrict -> return ()
181 SrcStrict -> txt "!"
126 SrcStrict -> txt "!"
182 SrcLazy -> txt "~"
127 SrcLazy -> txt "~"
183− indentBody <- case NE.nonEmpty m_pats of
128+ inci' <- case NE.nonEmpty m_pats of
184− Nothing ->
129+ Nothing -> id <$ case style of
185− False <$ case style of
130+ Function name -> p_rdrName name
186− Function name -> p_rdrName name
131+ _ -> return ()
188 Just ne_pats -> do
132 Just ne_pats -> do
189− let combinedSpans = case style of
133+ let combinedSpans = combineSrcSpans' $
190− Function name -> combineSrcSpans (getLoc name) patSpans
134+ getLoc <$> ne_pats
191− _ -> patSpans
135+ inci' = if isOneLineSpan combinedSpans
192− patSpans = combineSrcSpans' (getLoc <$> ne_pats)
136+ then id
193− indentBody = not (isOneLineSpan combinedSpans)
137+ else inci
194− switchLayout [combinedSpans] $ do
138+ switchLayout combinedSpans $ do
195− let stdCase = sep breakpoint (located' p_pat) m_pats
139+ let stdCase = velt' (located' p_pat <$> m_pats)
196 case style of
140 case style of
197 Function name ->
141 Function name ->
198 p_infixDefHelper
142 p_infixDefHelper
200− indentBody
144+ inci'
201 (p_rdrName name)
145 (p_rdrName name)
202 (located' p_pat <$> m_pats)
146 (located' p_pat <$> m_pats)
203 PatternBind -> stdCase
147 PatternBind -> stdCase
@@ -208,256 +152,225 @@ p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
208 BangPat _ _ -> True
152 BangPat _ _ -> True
209 SplicePat _ _ -> True
153 SplicePat _ _ -> True
210 _ -> False
154 _ -> False
211− txt "\\"
155+ txt (if needsSpace then "\\ " else "\\")
212− when needsSpace space
156+ stdCase
214 LambdaCase -> stdCase
157 LambdaCase -> stdCase
215− return indentBody
158+ return inci'
216− let -- Calculate position of end of patterns. This is useful when we decide
159+
217− -- about putting certain constructions in hanging positions.
160+ let
218− endOfPats = case NE.nonEmpty m_pats of
161+ -- Calculate position of end of patterns. This is useful when we decide
219− Nothing -> case style of
162+ -- about putting certain constructions in hanging positions.
220− Function name -> Just (getLoc name)
163+ endOfPats = case NE.nonEmpty m_pats of
221− _ -> Nothing
164+ Nothing -> case style of
222− Just pats -> (Just . getLoc . NE.last) pats
165+ Function name -> (Just . srcSpanEnd . getLoc) name
223− isCase = \case
166+ _ -> Nothing
224− Case -> True
167+ Just pats -> (Just . srcSpanEnd . getLoc . NE.last) pats
225− LambdaCase -> True
168+ isCase = \case
226− _ -> False
169+ Case -> True
227− hasGuards = withGuards grhssGRHSs
170+ LambdaCase -> True
228− grhssSpan =
171+ _ -> False
229− combineSrcSpans' $
172+ inci' $ do
230− getGRHSSpan . unLoc <$> NE.fromList grhssGRHSs
173+ let GRHSs {..} = m_grhss
231− patGrhssSpan =
174+ hasGuards = withGuards grhssGRHSs
232− maybe
175+ unless (length grhssGRHSs > 1) $ do
234− (combineSrcSpans grhssSpan . srcLocSpan . srcSpanEnd)
238− Nothing -> blockPlacement placer grhssGRHSs
240− if onTheSameLine spn grhssSpan
241− then blockPlacement placer grhssGRHSs
245− if isCase style && hasGuards
248− sep newline (located' (p_grhs' placer render groupStyle)) grhssGRHSs
250− let whereIsEmpty = GHC.isEmptyLocalBindsPR (unLoc grhssLocalBinds)
251− unless (GHC.eqEmptyLocalBinds (unLoc grhssLocalBinds)) $ do
254− unless whereIsEmpty breakpoint
255− inci $ located grhssLocalBinds p_hsLocalBinds
256− inciIf indentBody $ do
257− unless (length grhssGRHSs > 1) $
258 case style of
176 case style of
259 Function _ | hasGuards -> return ()
177 Function _ | hasGuards -> return ()
260− Function _ -> space >> inci equals
178+ Function _ -> txt " ="
261− PatternBind -> space >> inci equals
179+ PatternBind -> txt " ="
262 s | isCase s && hasGuards -> return ()
180 s | isCase s && hasGuards -> return ()
263− _ -> space >> txt "->"
181+ _ -> txt " ->"
264− switchLayout [patGrhssSpan] $
182+ let grhssSpan = combineSrcSpans' $
265− placeHanging placement p_body
183+ getGRHSSpan . unLoc <$> NE.fromList grhssGRHSs
266− inci p_where
184+ patGrhssSpan = maybe grhssSpan
267−p_match' _ _ _ _ _ _ (XGRHSs x) = noExtCon x
185+ (combineSrcSpans grhssSpan . srcLocSpan) endOfPats
188+ Nothing -> blockPlacement placer grhssGRHSs
191+ (mkSrcSpan spn (srcSpanStart grhssSpan))
192+ then blockPlacement placer grhssGRHSs
194+ inciLocalBinds = case placement of
199+ if isCase style && hasGuards
202+ newlineSep (located' (p_grhs' pretty groupStyle)) grhssGRHSs
203+ let whereLocation = combineSrcSpans patGrhssSpan $ getLoc grhssLocalBinds
204+ whereIsEmpty = GHC.isEmptyLocalBindsPR (unLoc grhssLocalBinds)
205+ unless (GHC.eqEmptyLocalBinds (unLoc grhssLocalBinds))
207+ . switchLayout whereLocation $ do
208+ if whereIsEmpty then newline else breakpoint
210+ unless whereIsEmpty $ do
212+ inci (located grhssLocalBinds p_hsLocalBinds)
214+ Lambda -> placeHanging placement $
215+ switchLayout patGrhssSpan p_body
216+ _ -> switchLayout patGrhssSpan $
217+ placeHanging placement p_body
269p_grhs :: GroupStyle -> GRHS GhcPs (LHsExpr GhcPs) -> R ()
219p_grhs :: GroupStyle -> GRHS GhcPs (LHsExpr GhcPs) -> R ()
270−p_grhs = p_grhs' exprPlacement p_hsExpr
220+p_grhs = p_grhs' p_hsExpr
272−p_grhs' ::
222+p_grhs'
273− Data body =>
223+ :: Data body
274− -- | How to get body placement
224+ => (body -> R ())
275− (body -> Placement) ->
225+ -> GroupStyle
276− -- | How to print body
226+ -> GRHS GhcPs (Located body)
277− (body -> R ()) ->
227+ -> R ()
278− GroupStyle ->
228+p_grhs' pretty style (GRHS NoExt guards body) =
279− GRHS GhcPs (Located body) ->
281−p_grhs' placer render style (GRHS NoExtField guards body) =
282 case guards of
229 case guards of
283 [] -> p_body
230 [] -> p_body
285− txt "|"
232+ txt "| "
233+ velt $ withSep comma (located' p_stmt) xs
287− sitcc (sep commaDel (sitcc . located' p_stmt) xs)
235+ txt $ case style of
288− space
236+ EqualSign -> "="
289− inci $ case style of
237+ RightArrow -> "->"
290− EqualSign -> equals
238+ breakpoint
291− RightArrow -> txt "->"
239+ inci p_body
292− placeHanging placement p_body
294− placement =
241+ p_body = located body pretty
295− case endOfGuards of
242+p_grhs' _ _ (XGRHS NoExt) = notImplemented "XGRHS"
296− Nothing -> placer (unLoc body)
298− if onTheSameLine spn (getLoc body)
299− then placer (unLoc body)
302− case NE.nonEmpty guards of
304− Just gs -> (Just . getLoc . NE.last) gs
305− p_body = located body render
306−p_grhs' _ _ _ (XGRHS x) = noExtCon x
308p_hsCmd :: HsCmd GhcPs -> R ()
244p_hsCmd :: HsCmd GhcPs -> R ()
309p_hsCmd = \case
245p_hsCmd = \case
310− HsCmdArrApp NoExtField body input arrType _ -> do
246+ HsCmdArrApp NoExt body input arrType _ -> do
311 located body p_hsExpr
247 located body p_hsExpr
312− breakpoint
248+ txt $ case arrType of
313− inci $ do
249+ HsFirstOrderApp -> " -<"
314− case arrType of
250+ HsHigherOrderApp -> " -<<"
315− HsFirstOrderApp -> txt "-<"
251+ placeHanging (exprPlacement (unLoc input)) $
316− HsHigherOrderApp -> txt "-<<"
252+ located input p_hsExpr
317− placeHanging (exprPlacement (unLoc input)) $
253+ HsCmdArrForm NoExt form Prefix _ cmds -> banana $ sitcc $ do
318− located input p_hsExpr
319− HsCmdArrForm NoExtField form Prefix _ cmds -> banana $ do
320 located form p_hsExpr
254 located form p_hsExpr
321− unless (null cmds) $ do
255+ unless (null cmds) $ do
322 breakpoint
256 breakpoint
323 inci (sequence_ (intersperse breakpoint (located' p_hsCmdTop <$> cmds)))
257 inci (sequence_ (intersperse breakpoint (located' p_hsCmdTop <$> cmds)))
324− HsCmdArrForm NoExtField form Infix _ [left, right] -> do
258+ HsCmdArrForm NoExt form Infix _ [left, right] -> do
325 located left p_hsCmdTop
259 located left p_hsCmdTop
327 located form p_hsExpr
261 located form p_hsExpr
328 placeHanging (cmdTopPlacement (unLoc right)) $
262 placeHanging (cmdTopPlacement (unLoc right)) $
329 located right p_hsCmdTop
263 located right p_hsCmdTop
330− HsCmdArrForm NoExtField _ Infix _ _ -> notImplemented "HsCmdArrForm"
264+ HsCmdArrForm NoExt _ Infix _ _ -> notImplemented "HsCmdArrForm"
331 HsCmdApp {} ->
265 HsCmdApp {} ->
332 -- XXX Does this ever occur in the syntax tree? It does not seem like it
266 -- XXX Does this ever occur in the syntax tree? It does not seem like it
333 -- does. Open an issue and ping @yumiova if this ever occurs in output.
267 -- does. Open an issue and ping @yumiova if this ever occurs in output.
334 notImplemented "HsCmdApp"
268 notImplemented "HsCmdApp"
335− HsCmdLam NoExtField mgroup -> p_matchGroup' cmdPlacement p_hsCmd Lambda mgroup
269+ HsCmdLam NoExt mgroup -> p_matchGroup' cmdPlacement p_hsCmd Lambda mgroup
336− HsCmdPar NoExtField c -> parens N (located c p_hsCmd)
270+ HsCmdPar NoExt c -> parens (located c p_hsCmd)
337− HsCmdCase NoExtField e mgroup ->
271+ HsCmdCase NoExt e mgroup -> do
338− p_case cmdPlacement p_hsCmd e mgroup
272+ txt "case "
339− HsCmdIf NoExtField _ if' then' else' ->
273+ located e p_hsExpr
340− p_if cmdPlacement p_hsCmd if' then' else'
274+ txt " of"
341− HsCmdLet NoExtField localBinds c ->
275+ breakpoint
342− p_let p_hsCmd localBinds c
276+ inci (p_matchGroup' cmdPlacement p_hsCmd Case mgroup)
343− HsCmdDo NoExtField es -> do
277+ HsCmdIf NoExt _ if' then' else' -> do
279+ located if' p_hsExpr
282+ located then' $ \x -> do
287+ located else' $ \x -> do
290+ HsCmdLet NoExt localBinds c -> do
292+ sitcc (located localBinds p_hsLocalBinds)
295+ sitcc (located c p_hsCmd)
296+ HsCmdDo NoExt es -> do
346− inci . located es $
299+ inci (located es (newlineSep (located' (sitcc . p_stmt' p_hsCmd))))
347− sitcc . sep newline (sitcc . withSpacing (p_stmt' cmdPlacement p_hsCmd))
348 HsCmdWrap {} -> notImplemented "HsCmdWrap"
300 HsCmdWrap {} -> notImplemented "HsCmdWrap"
349− XCmd x -> noExtCon x
301+ XCmd {} -> notImplemented "XCmd"
351p_hsCmdTop :: HsCmdTop GhcPs -> R ()
303p_hsCmdTop :: HsCmdTop GhcPs -> R ()
352p_hsCmdTop = \case
304p_hsCmdTop = \case
353− HsCmdTop NoExtField cmd -> located cmd p_hsCmd
305+ HsCmdTop NoExt cmd -> located cmd p_hsCmd
354− XCmdTop x -> noExtCon x
306+ XCmdTop {} -> notImplemented "XHsCmdTop"
356−-- | Render an expression preserving blank lines between such consecutive
357−-- expressions found in the original source code.
359− -- | Rendering function
361− -- | Entity to render
364−withSpacing f l = located l $ \x -> do
366− UnhelpfulSpan _ -> f x
367− RealSrcSpan currentSpn -> do
368− getSpanMark >>= \case
369− -- Spacing before comments will be handled by the code
370− -- that prints comments, so we just have to deal with
371− -- blank lines between statements here.
372− Just (StatementSpan lastSpn) ->
373− if srcSpanStartLine currentSpn > srcSpanEndLine lastSpn + 1
378− -- In some cases the (f x) expression may insert a new mark. We want
379− -- to be careful not to override comment marks.
380− getSpanMark >>= \case
381− Just (HaddockSpan _ _) -> return ()
382− Just (CommentSpan _) -> return ()
383− _ -> setSpanMark (StatementSpan currentSpn)
385p_stmt :: Stmt GhcPs (LHsExpr GhcPs) -> R ()
308p_stmt :: Stmt GhcPs (LHsExpr GhcPs) -> R ()
386−p_stmt = p_stmt' exprPlacement p_hsExpr
309+p_stmt = p_stmt' p_hsExpr
388−p_stmt' ::
311+p_stmt'
389− Data body =>
312+ :: Data body
390− -- | Placer
313+ => (body -> R ())
391− (body -> Placement) ->
314+ -> Stmt GhcPs (Located body)
392− -- | Render
315+ -> R ()
393− (body -> R ()) ->
316+p_stmt' pretty = \case
394− -- | Statement to render
317+ LastStmt NoExt body _ _ -> located body pretty
395− Stmt GhcPs (Located body) ->
318+ BindStmt NoExt l f _ _ -> do
396− R ()
319+ located l p_pat
397−p_stmt' placer render = \case
398− LastStmt NoExtField body _ _ -> located body render
399− BindStmt NoExtField p f _ _ -> do
403− let loc = getLoc p
322+ breakpoint
404− placement =
323+ inci (located f pretty)
408− (mkSrcSpan (srcSpanEnd loc) (srcSpanStart l'))
411− switchLayout [loc, getLoc f] $
412− placeHanging placement (located f render)
413 ApplicativeStmt {} -> notImplemented "ApplicativeStmt" -- generated by renamer
324 ApplicativeStmt {} -> notImplemented "ApplicativeStmt" -- generated by renamer
414− BodyStmt NoExtField body _ _ -> located body render
325+ BodyStmt NoExt body _ _ -> located body pretty
415− LetStmt NoExtField binds -> do
326+ LetStmt NoExt binds -> do
416− txt "let"
327+ txt "let "
418 sitcc $ located binds p_hsLocalBinds
328 sitcc $ located binds p_hsLocalBinds
419 ParStmt {} ->
329 ParStmt {} ->
420− -- 'ParStmt' should always be eliminated in 'gatherStmt' already, such
330+ -- NOTE 'ParStmt' should always be eliminated in 'gatherStmt' already,
421− -- that it never occurs in 'p_stmt''. Consequently, handling it here
331+ -- such that it never occurs in 'p_stmt''. Consequently, handling it
422− -- would be redundant.
332+ -- here would be redundant.
423 notImplemented "ParStmt"
333 notImplemented "ParStmt"
424− TransStmt {..} ->
334+ TransStmt {..} -> do
425− -- 'TransStmt' only needs to account for render printing itself, since
335+ -- NOTE 'TransStmt' only needs to account for pretty printing itself,
426− -- pretty printing of relevant statements (e.g., in 'trS_stmts') is
336+ -- since pretty printing of relevant statements (e.g., in 'trS_stmts')
427− -- handled through 'gatherStmt'.
337+ -- is handled through 'gatherStmt'.
428 case (trS_form, trS_by) of
338 case (trS_form, trS_by) of
429− (ThenForm, Nothing) -> do
339+ (ThenForm, Nothing) -> located trS_using $ \x -> do
430 txt "then"
340 txt "then"
431 breakpoint
341 breakpoint
432− inci $ located trS_using p_hsExpr
342+ inci (p_hsExpr x)
433 (ThenForm, Just e) -> do
343 (ThenForm, Just e) -> do
434− txt "then"
344+ located trS_using $ \x -> do
435− breakpoint
345+ txt "then"
436− inci $ located trS_using p_hsExpr
346+ breakpoint
437− breakpoint
347+ inci (p_hsExpr x)
439 breakpoint
348 breakpoint
440− inci $ located e p_hsExpr
349+ located e $ \x -> do
441− (GroupForm, Nothing) -> do
350+ txt "by"
353+ (GroupForm, Nothing) -> located trS_using $ \x -> do
442 txt "then group using"
354 txt "then group using"
443 breakpoint
355 breakpoint
444− inci $ located trS_using p_hsExpr
356+ inci (p_hsExpr x)
445 (GroupForm, Just e) -> do
357 (GroupForm, Just e) -> do
446− txt "then group by"
358+ located e $ \x -> do
447− breakpoint
359+ txt "then group by"
448− inci $ located e p_hsExpr
360+ breakpoint
449− breakpoint
361+ inci (p_hsExpr x)
451 breakpoint
362 breakpoint
452− inci $ located trS_using p_hsExpr
363+ located trS_using $ \x -> do
453 RecStmt {..} -> do
367 RecStmt {..} -> do
454− txt "rec"
368+ txt "rec "
455− space
369+ sitcc $ newlineSep (located' (p_stmt' pretty)) recS_stmts
456− sitcc $ sepSemi (withSpacing (p_stmt' placer render)) recS_stmts
370+ XStmtLR {} -> notImplemented "XStmtLR"
457− XStmtLR c -> noExtCon c
459gatherStmt :: ExprLStmt GhcPs -> [[ExprLStmt GhcPs]]
372gatherStmt :: ExprLStmt GhcPs -> [[ExprLStmt GhcPs]]
460−gatherStmt (L _ (ParStmt NoExtField block _ _)) =
373+gatherStmt (L _ (ParStmt NoExt block _ _)) =
461 foldr ((<>) . gatherStmtBlock) [] block
374 foldr ((<>) . gatherStmtBlock) [] block
462gatherStmt (L s stmt@TransStmt {..}) =
375gatherStmt (L s stmt@TransStmt {..}) =
463 foldr liftAppend [] ((gatherStmt <$> trS_stmts) <> pure [[L s stmt]])
376 foldr liftAppend [] ((gatherStmt <$> trS_stmts) <> pure [[L s stmt]])
@@ -466,641 +379,438 @@ gatherStmt stmt = [[stmt]]
466gatherStmtBlock :: ParStmtBlock GhcPs GhcPs -> [[ExprLStmt GhcPs]]
379gatherStmtBlock :: ParStmtBlock GhcPs GhcPs -> [[ExprLStmt GhcPs]]
467gatherStmtBlock (ParStmtBlock _ stmts _ _) =
380gatherStmtBlock (ParStmtBlock _ stmts _ _) =
468 foldr (liftAppend . gatherStmt) [] stmts
381 foldr (liftAppend . gatherStmt) [] stmts
469−gatherStmtBlock (XParStmtBlock x) = noExtCon x
382+gatherStmtBlock XParStmtBlock {} = notImplemented "XParStmtBlock"
471p_hsLocalBinds :: HsLocalBindsLR GhcPs GhcPs -> R ()
384p_hsLocalBinds :: HsLocalBindsLR GhcPs GhcPs -> R ()
472p_hsLocalBinds = \case
385p_hsLocalBinds = \case
473− HsValBinds NoExtField (ValBinds NoExtField bag lsigs) -> do
386+ HsValBinds NoExt (ValBinds NoExt bag lsigs) -> do
474− -- When in a single-line layout, there is a chance that the inner
387+ let ssStart = either
475− -- elements will also contain semicolons and they will confuse the
388+ (srcSpanStart . getLoc)
476− -- parser. so we request braces around every element except the last.
389+ (srcSpanStart . getLoc)
477− br <- layoutToBraces <$> getLayout
390+ items =
478− let items =
391+ (Left <$> bagToList bag) ++ (Right <$> lsigs)
479− let injectLeft (L l x) = L l (Left x)
392+ p_item (Left x) = located x p_valDecl'
480− injectRight (L l x) = L l (Right x)
393+ p_item (Right x) = located x p_sigDecl'
481− in (injectLeft <$> bagToList bag) ++ (injectRight <$> lsigs)
394+ newlineSep p_item (sortOn ssStart items)
482− positionToBracing = \case
395+ HsValBinds NoExt _ -> notImplemented "HsValBinds"
483− SinglePos -> id
396+ HsIPBinds NoExt _ -> notImplemented "HsIPBinds"
484− FirstPos -> br
397+ EmptyLocalBinds NoExt -> return ()
485− MiddlePos -> br
398+ XHsLocalBindsLR _ -> notImplemented "XHsLocalBindsLR"
487− p_item' (p, item) =
400+p_hsRecField
488− positionToBracing p $
401+ :: (Data id, Outputable id)
489− withSpacing (either p_valDecl p_sigDecl) item
402+ => HsRecField' id (LHsExpr GhcPs)
490− binds = sortOn (srcSpanStart . getLoc) items
403+ -> R ()
491− sitcc $ sepSemi p_item' (attachRelativePos binds)
404+p_hsRecField = \HsRecField {..} -> do
492− HsValBinds NoExtField _ -> notImplemented "HsValBinds"
405+ located hsRecFieldLbl atom
493− HsIPBinds NoExtField (IPBinds NoExtField xs) ->
406+ unless hsRecPun $ do
494− -- Second argument of IPBind is always Left before type-checking.
407+ txt " = "
495− let p_ipBind (IPBind NoExtField (Left name) expr) = do
408+ located hsRecFieldArg p_hsExpr
497− space
410+p_hsTupArg :: HsTupArg GhcPs -> R ()
498− equals
411+p_hsTupArg = \case
499− breakpoint
412+ Present NoExt x -> located x p_hsExpr
500− useBraces $ inci $ located expr p_hsExpr
413+ Missing NoExt -> pure ()
501− p_ipBind (IPBind NoExtField (Right _) _) =
414+ XTupArg {} -> notImplemented "XTupArg"
502− -- Should only occur after the type checker
503− notImplemented "IPBind _ (Right _) _"
504− p_ipBind (XIPBind x) = noExtCon x
505− in sepSemi (located' p_ipBind) xs
506− HsIPBinds NoExtField _ -> notImplemented "HsIpBinds"
507− EmptyLocalBinds NoExtField -> return ()
508− XHsLocalBindsLR x -> noExtCon x
511− HsRecField' RdrName (LHsExpr GhcPs) ->
513−p_hsRecField HsRecField {..} = do
514− p_rdrName hsRecFieldLbl
515− unless hsRecPun $ do
519− if onTheSameLine (getLoc hsRecFieldLbl) (getLoc hsRecFieldArg)
520− then exprPlacement (unLoc hsRecFieldArg)
522− placeHanging placement (located hsRecFieldArg p_hsExpr)
524p_hsExpr :: HsExpr GhcPs -> R ()
416p_hsExpr :: HsExpr GhcPs -> R ()
525−p_hsExpr = p_hsExpr' N
417+p_hsExpr = \case
526−
418+ HsVar NoExt name -> p_rdrName name
527−p_hsExpr' :: BracketStyle -> HsExpr GhcPs -> R ()
419+ HsUnboundVar NoExt _ -> notImplemented "HsUnboundVar"
528−p_hsExpr' s = \case
420+ HsConLikeOut NoExt _ -> notImplemented "HsConLikeOut"
529− HsVar NoExtField name -> p_rdrName name
421+ HsRecFld NoExt x ->
530− HsUnboundVar NoExtField v -> atom (unboundVarOcc v)
531− HsConLikeOut NoExtField _ -> notImplemented "HsConLikeOut"
532− HsRecFld NoExtField x ->
533 case x of
422 case x of
534− Unambiguous NoExtField name -> p_rdrName name
423+ Unambiguous NoExt name -> p_rdrName name
535− Ambiguous NoExtField name -> p_rdrName name
424+ Ambiguous NoExt name -> p_rdrName name
536− XAmbiguousFieldOcc xx -> noExtCon xx
425+ XAmbiguousFieldOcc NoExt -> notImplemented "XAmbiguousFieldOcc"
537− HsOverLabel NoExtField _ v -> do
426+ HsOverLabel NoExt _ v -> do
540− HsIPVar NoExtField (HsIPName name) -> do
429+ HsIPVar NoExt (HsIPName name) -> do
542 atom name
431 atom name
543− HsOverLit NoExtField v -> atom (ol_val v)
432+ HsOverLit NoExt v -> atom (ol_val v)
544− HsLit NoExtField lit ->
433+ HsLit NoExt lit -> atom lit
545− case lit of
434+ HsLam NoExt mgroup ->
546− HsString (SourceText stxt) _ -> p_stringLit stxt
547− HsStringPrim (SourceText stxt) _ -> p_stringLit stxt
549− HsLam NoExtField mgroup ->
550 p_matchGroup Lambda mgroup
435 p_matchGroup Lambda mgroup
551− HsLamCase NoExtField mgroup -> do
436+ HsLamCase NoExt mgroup -> do
552 txt "\\case"
437 txt "\\case"
553− breakpoint
438+ newline
554 inci (p_matchGroup LambdaCase mgroup)
439 inci (p_matchGroup LambdaCase mgroup)
555− HsApp NoExtField f x -> do
440+ HsApp NoExt f x -> do
556− let -- In order to format function applications with multiple parameters
441+ located f p_hsExpr
557− -- nicer, traverse the AST to gather the function and all the
442+ breakpoint
558− -- parameters together.
443+ inci (located x p_hsExpr)
559− gatherArgs f' knownArgs =
444+ HsAppType a e -> do
561− L _ (HsApp _ l r) -> gatherArgs l (r <| knownArgs)
562− _ -> (f', knownArgs)
563− (func, args) = gatherArgs f (x :| [])
564− -- We need to handle the last argument specially if it is a
565− -- hanging construct, so separate it from the rest.
566− (initp, lastp) = (NE.init args, NE.last args)
569− getLoc f :| [(srcLocSpan . srcSpanStart . getLoc) lastp]
570− -- Hang the last argument only if the initial arguments span one
573− if isOneLineSpan initSpan
574− then exprPlacement (unLoc lastp)
576− -- If the last argument is not hanging, just separate every argument as
577− -- usual. If it is hanging, print the initial arguments and hang the
578− -- last one. Also, use braces around the every argument except the last
582− let -- Usually we want to bump indentation for arguments for the
583− -- sake of readability. However, when the function itself is a
584− -- do-block or case expression it is not a good idea. It seems
585− -- to be safe to always bump indentation when the function
586− -- expression is parenthesised.
589− L _ (HsPar NoExtField _) -> True
590− L _ (HsAppType NoExtField _ _) -> True
591− L _ (HsMultiIf NoExtField _) -> True
592− L spn _ -> isOneLineSpan spn
595− SingleLine -> useBraces
598− located func (p_hsExpr' s)
600− inciIf doIndent $ sep breakpoint (located' p_hsExpr) initp
601− inciIf doIndent $ do
602− unless (null initp) breakpoint
603− located lastp p_hsExpr
605− useBraces . switchLayout [initSpan] $ do
606− located func (p_hsExpr' s)
608− sep breakpoint (located' p_hsExpr) initp
609− placeHanging placement $
610− located lastp p_hsExpr
611− HsAppType NoExtField e a -> do
612 located e p_hsExpr
445 located e p_hsExpr
613 breakpoint
446 breakpoint
614 inci $ do
447 inci $ do
616− -- Insert a space when the type is represented as a TH splice to avoid
617− -- gluing @ and $ together.
618− case unLoc (hswc_body a) of
619− HsSpliceTy {} -> space
621 located (hswc_body a) p_hsType
449 located (hswc_body a) p_hsType
622− OpApp NoExtField x op y -> do
450+ OpApp NoExt x op y -> do
623− let opTree = OpBranch (exprOpTree x) op (exprOpTree y)
451+ located x p_hsExpr
624− p_exprOpTree s (reassociateOpTree getOpName opTree)
625− NegApp NoExtField e _ -> do
453+ let opWrapper = case unLoc op of
454+ EWildPat NoExt -> backticks
456+ located op (opWrapper . p_hsExpr)
457+ placeHanging (exprPlacement (unLoc y)) $
459+ NegApp NoExt e _ -> do
628 located e p_hsExpr
461 located e p_hsExpr
629− HsPar NoExtField e ->
462+ HsPar NoExt e -> parens (located e p_hsExpr)
630− parens s (located e (dontUseBraces . p_hsExpr))
463+ SectionL NoExt x op -> do
631− SectionL NoExtField x op -> do
632 located x p_hsExpr
464 located x p_hsExpr
633 breakpoint
465 breakpoint
634 inci (located op p_hsExpr)
466 inci (located op p_hsExpr)
635− SectionR NoExtField op x -> do
467+ SectionR NoExt op x -> do
636 located op p_hsExpr
468 located op p_hsExpr
637− useRecordDot' <- useRecordDot
469+ breakpoint
638− let isRecordDot' = isRecordDot (unLoc op) (getLoc x)
639− unless (useRecordDot' && isRecordDot') breakpoint
640 inci (located x p_hsExpr)
470 inci (located x p_hsExpr)
641− ExplicitTuple NoExtField args boxity ->
471+ ExplicitTuple NoExt args boxity -> do
642 let isSection = any (isMissing . unLoc) args
472 let isSection = any (isMissing . unLoc) args
643 isMissing = \case
473 isMissing = \case
644− Missing NoExtField -> True
474+ Missing NoExt -> True
645 _ -> False
475 _ -> False
646− p_arg = \case
476+ let parens' =
647− Present NoExtField x -> located x p_hsExpr
648− Missing NoExtField -> pure ()
649− XTupArg x -> noExtCon x
650− p_larg = sitcc . located' p_arg
652 case boxity of
477 case boxity of
653 Boxed -> parens
478 Boxed -> parens
654 Unboxed -> parensHash
479 Unboxed -> parensHash
655− in if isSection
480+ parens' $ if isSection
656− then
481+ then sequence_ (withSep (txt ",") (located' p_hsTupArg) args)
657− switchLayout [] . parens' s $
482+ else velt (withSep comma (located' p_hsTupArg) args)
658− sep comma p_larg args
483+ ExplicitSum NoExt tag arity e -> do
659− else
484+ let before = tag - 1
660− switchLayout (getLoc <$> args) . parens' s $
485+ after = arity - before - 1
661− sep commaDel p_larg args
486+ args = replicate before Nothing <> [Just e] <> replicate after Nothing
662− ExplicitSum NoExtField tag arity e ->
487+ f (x,i) = do
663− p_unboxedSum N tag arity (located e p_hsExpr)
488+ let isFirst = i == 0
664− HsCase NoExtField e mgroup ->
489+ isLast = i == arity - 1
665− p_case exprPlacement p_hsExpr e mgroup
490+ case x of
666− HsIf NoExtField _ if' then' else' ->
491+ Nothing ->
667− p_if exprPlacement p_hsExpr if' then' else'
492+ unless (isFirst || isLast) space
668− HsMultiIf NoExtField guards -> do
493+ Just l -> do
669− txt "if"
494+ unless isFirst space
497+ parensHash $ sequence_ (withSep (txt "|") f (zip args [0..]))
498+ HsCase NoExt e mgroup -> do
670 breakpoint
502 breakpoint
671− inci . inci $ sep newline (located' (p_grhs RightArrow)) guards
503+ inci (p_matchGroup Case mgroup)
672− HsLet NoExtField localBinds e ->
504+ HsIf NoExt _ if' then' else' -> do
673− p_let p_hsExpr localBinds e
505+ txt "if "
674− HsDo NoExtField ctx es -> do
506+ located if' p_hsExpr
509+ located then' $ \x -> do
514+ located else' $ \x -> do
517+ HsMultiIf NoExt guards -> do
519+ sitcc $ newlineSep (located' (p_grhs RightArrow)) guards
520+ HsLet NoExt localBinds e -> do
522+ sitcc (located localBinds p_hsLocalBinds)
523+ vlayout space (newline >> space)
525+ sitcc (located e p_hsExpr)
526+ HsDo NoExt ctx es -> do
675 let doBody header = do
527 let doBody header = do
676 txt header
528 txt header
677− breakpoint
529+ newline
678− ub <- layoutToBraces <$> getLayout
530+ inci $ located es (newlineSep (located' (sitcc . p_stmt)))
679− inci $
531+ compBody = brackets $ located es $ \xs -> do
681− (ub . withSpacing (p_stmt' exprPlacement (p_hsExpr' S)))
683− compBody = brackets N . located es $ \xs -> do
684 let p_parBody =
532 let p_parBody =
686− (breakpoint >> txt "|" >> space)
534+ intersperse breakpoint .
687− p_seqBody
535+ withSep (txt "| ") p_seqBody
688 p_seqBody =
536 p_seqBody =
689− sitcc
537+ sequence_ .
690− . sep
538+ intersperse (vlayout (pure ()) newline) .
691− commaDel
539+ withSep comma (located' (sitcc . p_stmt))
692− (located' (sitcc . p_stmt))
693 stmts = init xs
540 stmts = init xs
694 yield = last xs
541 yield = last xs
695 lists = foldr (liftAppend . gatherStmt) [] stmts
542 lists = foldr (liftAppend . gatherStmt) [] stmts
696 located yield p_stmt
543 located yield p_stmt
697 breakpoint
544 breakpoint
698− txt "|"
545+ txt "| "
700 p_parBody lists
546 p_parBody lists
701 case ctx of
547 case ctx of
702 DoExpr -> doBody "do"
548 DoExpr -> doBody "do"
703 MDoExpr -> doBody "mdo"
549 MDoExpr -> doBody "mdo"
704 ListComp -> compBody
550 ListComp -> compBody
705 MonadComp -> notImplemented "MonadComp"
551 MonadComp -> notImplemented "MonadComp"
706− ArrowExpr -> notImplemented "ArrowExpr"
552+ ArrowExpr -> notImplemented "ArrowExpr"
707 GhciStmtCtxt -> notImplemented "GhciStmtCtxt"
553 GhciStmtCtxt -> notImplemented "GhciStmtCtxt"
708 PatGuard _ -> notImplemented "PatGuard"
554 PatGuard _ -> notImplemented "PatGuard"
709 ParStmtCtxt _ -> notImplemented "ParStmtCtxt"
555 ParStmtCtxt _ -> notImplemented "ParStmtCtxt"
710 TransStmtCtxt _ -> notImplemented "TransStmtCtxt"
556 TransStmtCtxt _ -> notImplemented "TransStmtCtxt"
711 ExplicitList _ _ xs ->
557 ExplicitList _ _ xs ->
712− brackets s $
558+ brackets $ velt (withSep comma (located' p_hsExpr) xs)
713− sep commaDel (sitcc . located' p_hsExpr) xs
714 RecordCon {..} -> do
559 RecordCon {..} -> do
715 located rcon_con_name atom
560 located rcon_con_name atom
716 breakpoint
561 breakpoint
717 let HsRecFields {..} = rcon_flds
562 let HsRecFields {..} = rcon_flds
718− updName f =
563+ fields = located' p_hsRecField <$> rec_flds
719− (f :: HsRecField GhcPs (LHsExpr GhcPs))
720− { hsRecFieldLbl = case unLoc $ hsRecFieldLbl f of
722− XFieldOcc x -> noExtCon x
724− fields = located' (p_hsRecField . updName) <$> rec_flds
726 case rec_dotdot of
565 case rec_dotdot of
727 Just {} -> [txt ".."]
566 Just {} -> [txt ".."]
728 Nothing -> []
567 Nothing -> []
729− inci . braces N $
568+ inci $ braces $ velt (withSep comma id (fields <> dotdot))
730− sep commaDel sitcc (fields <> dotdot)
731 RecordUpd {..} -> do
569 RecordUpd {..} -> do
732 located rupd_expr p_hsExpr
570 located rupd_expr p_hsExpr
733− useRecordDot' <- useRecordDot
571+ breakpoint
734− let mrs sp = case getLoc sp of
572+ inci $ braces $ velt (withSep comma (located' p_hsRecField) rupd_flds)
735− RealSrcSpan r -> Just r
573+ ExprWithTySig affix x -> sitcc $ do
738− ((1 +) . srcSpanEndCol <$> mrs rupd_expr)
739− == (srcSpanStartCol <$> mrs (head rupd_flds))
740− unless (useRecordDot' && isPluginForm) breakpoint
742− (f :: HsRecUpdField GhcPs)
743− { hsRecFieldLbl = case unLoc $ hsRecFieldLbl f of
745− Unambiguous _ n -> n
746− XAmbiguousFieldOcc x -> noExtCon x
751− (sitcc . located' (p_hsRecField . updName))
753− ExprWithTySig NoExtField x HsWC {hswc_body = HsIB {..}} -> sitcc $ do
754 located x p_hsExpr
574 located x p_hsExpr
757 breakpoint
575 breakpoint
758− inci $ located hsib_body p_hsType
576+ inci $ do
759− ExprWithTySig NoExtField _ HsWC {hswc_body = XHsImplicitBndrs x} -> noExtCon x
577+ txt ":: "
760− ExprWithTySig NoExtField _ (XHsWildCardBndrs x) -> noExtCon x
578+ let HsWC {..} = affix
761− ArithSeq NoExtField _ x ->
579+ HsIB {..} = hswc_body
580+ located hsib_body p_hsType
581+ ArithSeq NoExt _ x -> do
762 case x of
582 case x of
763− From from -> brackets s $ do
583+ From from -> brackets $ do
764 located from p_hsExpr
584 located from p_hsExpr
765 breakpoint
585 breakpoint
767− FromThen from next -> brackets s $ do
587+ FromThen from next -> brackets $ do
768− sep commaDel (located' p_hsExpr) [from, next]
588+ velt (withSep comma (located' p_hsExpr) [from, next])
769 breakpoint
589 breakpoint
771− FromTo from to -> brackets s $ do
591+ FromTo from to -> brackets $ do
772 located from p_hsExpr
592 located from p_hsExpr
773 breakpoint
593 breakpoint
774− txt ".."
594+ txt ".. "
776 located to p_hsExpr
595 located to p_hsExpr
777− FromThenTo from next to -> brackets s $ do
596+ FromThenTo from next to -> brackets $ do
778− sep commaDel (located' p_hsExpr) [from, next]
597+ velt (withSep comma (located' p_hsExpr) [from, next])
779 breakpoint
598 breakpoint
780− txt ".."
599+ txt ".. "
782 located to p_hsExpr
600 located to p_hsExpr
783− HsSCC NoExtField _ name x -> do
601+ HsSCC NoExt _ name x -> do
784 txt "{-# SCC "
602 txt "{-# SCC "
785 atom name
603 atom name
786 txt " #-}"
604 txt " #-}"
787 breakpoint
605 breakpoint
788 located x p_hsExpr
606 located x p_hsExpr
789− HsCoreAnn NoExtField _ value x -> do
607+ HsCoreAnn NoExt _ value x -> do
790 txt "{-# CORE "
608 txt "{-# CORE "
791 atom value
609 atom value
792 txt " #-}"
610 txt " #-}"
793 breakpoint
611 breakpoint
794 located x p_hsExpr
612 located x p_hsExpr
795− HsBracket NoExtField x -> p_hsBracket x
613+ HsBracket NoExt x -> p_hsBracket x
796 HsRnBracketOut {} -> notImplemented "HsRnBracketOut"
614 HsRnBracketOut {} -> notImplemented "HsRnBracketOut"
797 HsTcBracketOut {} -> notImplemented "HsTcBracketOut"
615 HsTcBracketOut {} -> notImplemented "HsTcBracketOut"
798− HsSpliceE NoExtField splice -> p_hsSplice splice
616+ HsSpliceE NoExt splice -> p_hsSplice splice
799− HsProc NoExtField p e -> do
617+ HsProc NoExt p e -> do
800 txt "proc"
618 txt "proc"
801− located p $ \x -> do
619+ located p $ \x -> do
802 breakpoint
620 breakpoint
803 inci (p_pat x)
621 inci (p_pat x)
804 breakpoint
622 breakpoint
806− placeHanging (cmdTopPlacement (unLoc e)) $
624+ placeHanging (cmdTopPlacement (unLoc e)) (located e p_hsCmdTop)
807− located e p_hsCmdTop
625+ HsStatic _ e -> do
809 txt "static"
626 txt "static"
810 breakpoint
627 breakpoint
811 inci (located e p_hsExpr)
628 inci (located e p_hsExpr)
629+ HsArrApp NoExt body input arrType cond ->
630+ p_hsCmd (HsCmdArrApp NoExt body input arrType cond)
631+ HsArrForm NoExt form mfixity cmds ->
632+ p_hsCmd (HsCmdArrForm NoExt form Prefix mfixity cmds)
812 HsTick {} -> notImplemented "HsTick"
633 HsTick {} -> notImplemented "HsTick"
813 HsBinTick {} -> notImplemented "HsBinTick"
634 HsBinTick {} -> notImplemented "HsBinTick"
814 HsTickPragma {} -> notImplemented "HsTickPragma"
635 HsTickPragma {} -> notImplemented "HsTickPragma"
636+ EWildPat NoExt -> txt "_"
637+ EAsPat {} -> notImplemented "EAsPat"
638+ EViewPat {} -> notImplemented "EViewPat"
639+ ELazyPat {} -> notImplemented "ELazyPat"
815 HsWrap {} -> notImplemented "HsWrap"
640 HsWrap {} -> notImplemented "HsWrap"
816− XExpr x -> noExtCon x
641+ XExpr {} -> notImplemented "XExpr"
818p_patSynBind :: PatSynBind GhcPs GhcPs -> R ()
643p_patSynBind :: PatSynBind GhcPs GhcPs -> R ()
819p_patSynBind PSB {..} = do
644p_patSynBind PSB {..} = do
820− let rhs = do
645+ txt "pattern "
821− space
646+ let nonEmptySynDetails = \case
822− case psb_dir of
647+ PrefixCon (_:_) -> True
823− Unidirectional -> do
648+ RecCon (_:_) -> True
824− txt "<-"
649+ _ -> False
825− breakpoint
650+ case psb_dir of
826− located psb_def p_pat
651+ Unidirectional -> do
827− ImplicitBidirectional -> do
830− located psb_def p_pat
831− ExplicitBidirectional mgroup -> do
834− located psb_def p_pat
838− inci (p_matchGroup (Function psb_id) mgroup)
843 p_rdrName psb_id
652 p_rdrName psb_id
844− inci $ do
653+ when (nonEmptySynDetails psb_args) space
845− switchLayout (getLoc <$> xs) $ do
654+ p_patSynDetails psb_args
846− unless (null xs) breakpoint
655+ txt " <-"
847− sitcc (sep breakpoint p_rdrName xs)
656+ breakpoint
848− rhs
657+ inci (located psb_def p_pat)
849− RecCon xs -> do
658+ ImplicitBidirectional -> do
850− space
659+ p_rdrName psb_id
660+ when (nonEmptySynDetails psb_args) space
661+ p_patSynDetails psb_args
664+ inci (located psb_def p_pat)
665+ ExplicitBidirectional mgroup -> do
851 p_rdrName psb_id
666 p_rdrName psb_id
667+ when (nonEmptySynDetails psb_args) space
668+ p_patSynDetails psb_args
671+ inci (located psb_def p_pat)
852 inci $ do
673 inci $ do
853− switchLayout (getLoc . recordPatSynPatVar <$> xs) $ do
674+ line (txt "where")
854− unless (null xs) breakpoint
675+ inci (p_matchGroup (Function psb_id) mgroup)
855− braces N $
676+p_patSynBind (XPatSynBind NoExt) = notImplemented "XPatSynBind"
856− sep commaDel (p_rdrName . recordPatSynPatVar) xs
677+
857− rhs
678+p_patSynDetails :: HsPatSynDetails (Located RdrName) -> R ()
858− InfixCon l r -> do
679+p_patSynDetails = \case
859− switchLayout [getLoc l, getLoc r] $ do
680+ PrefixCon xs ->
860− space
681+ velt' (p_rdrName <$> xs)
861− p_rdrName l
682+ RecCon xs ->
862− breakpoint
683+ velt' (p_rdrName . recordPatSynPatVar <$> xs)
863− inci $ do
684+ InfixCon _ _ -> notImplemented "InfixCon"
868−p_patSynBind (XPatSynBind x) = noExtCon x
873− (body -> Placement) ->
879− MatchGroup GhcPs (Located body) ->
881−p_case placer render e mgroup = do
888− inci (p_matchGroup' placer render Case mgroup)
893− (body -> Placement) ->
903−p_if placer render if' then' else' = do
906− located if' p_hsExpr
911− located then' $ \x ->
912− placeHanging (placer x) (render x)
916− located else' $ \x ->
917− placeHanging (placer x) (render x)
923− Located (HsLocalBindsLR GhcPs GhcPs) ->
926−p_let render localBinds e = sitcc $ do
929− dontUseBraces $ sitcc (located localBinds p_hsLocalBinds)
930− vlayout space (newline >> txt " ")
933− sitcc (located e render)
935p_pat :: Pat GhcPs -> R ()
686p_pat :: Pat GhcPs -> R ()
936p_pat = \case
687p_pat = \case
937− WildPat NoExtField -> txt "_"
688+ WildPat NoExt -> txt "_"
938− VarPat NoExtField name -> p_rdrName name
689+ VarPat NoExt name -> p_rdrName name
939− LazyPat NoExtField pat -> do
690+ LazyPat NoExt pat -> do
941 located pat p_pat
692 located pat p_pat
942− AsPat NoExtField name pat -> do
693+ AsPat NoExt name pat -> do
943 p_rdrName name
694 p_rdrName name
945 located pat p_pat
696 located pat p_pat
946− ParPat NoExtField pat ->
697+ ParPat NoExt pat ->
947− located pat (parens S . p_pat)
698+ located pat (parens . p_pat)
948− BangPat NoExtField pat -> do
699+ BangPat NoExt pat -> do
950 located pat p_pat
701 located pat p_pat
951− ListPat NoExtField pats ->
702+ ListPat NoExt pats -> do
952− brackets S $ sep commaDel (located' p_pat) pats
703+ brackets $ velt (withSep comma (located' p_pat) pats)
953− TuplePat NoExtField pats boxing -> do
704+ TuplePat NoExt pats boxing -> do
954− let parens' =
705+ let f =
955 case boxing of
706 case boxing of
956− Boxed -> parens S
707+ Boxed -> parens
957− Unboxed -> parensHash S
708+ Unboxed -> parensHash
958− parens' $ sep commaDel (sitcc . located' p_pat) pats
709+ f $ velt (withSep comma (located' p_pat) pats)
959− SumPat NoExtField pat tag arity ->
710+ SumPat NoExt pat _ _ -> do
960− p_unboxedSum S tag arity (located pat p_pat)
711+ -- XXX I'm not sure about this one.
961 ConPatIn pat details ->
713 ConPatIn pat details ->
962 case details of
714 case details of
963 PrefixCon xs -> sitcc $ do
715 PrefixCon xs -> sitcc $ do
964 p_rdrName pat
716 p_rdrName pat
965 unless (null xs) $ do
717 unless (null xs) $ do
966 breakpoint
718 breakpoint
967− inci . sitcc $ sep breakpoint (sitcc . located' p_pat) xs
719+ inci $ velt' (located' p_pat <$> xs)
968 RecCon (HsRecFields fields dotdot) -> do
720 RecCon (HsRecFields fields dotdot) -> do
969 p_rdrName pat
721 p_rdrName pat
970 breakpoint
722 breakpoint
971 let f = \case
723 let f = \case
972 Nothing -> txt ".."
724 Nothing -> txt ".."
973 Just x -> located x p_pat_hsRecField
725 Just x -> located x p_pat_hsRecField
974− inci . braces N . sep commaDel f $
726+ inci . braces . velt . withSep comma f $ case dotdot of
975− case dotdot of
727+ Nothing -> Just <$> fields
976− Nothing -> Just <$> fields
728+ Just n -> (Just <$> take n fields) ++ [Nothing]
977− Just (L _ n) -> (Just <$> take n fields) ++ [Nothing]
729+ InfixCon x y -> do
978− InfixCon l r -> do
730+ located x p_pat
979− switchLayout [getLoc l, getLoc r] $ do
731+ space
980− located l p_pat
732+ p_rdrName pat
981− breakpoint
733+ breakpoint
982− inci $ do
734+ inci (located y p_pat)
986 ConPatOut {} -> notImplemented "ConPatOut" -- presumably created by renamer?
735 ConPatOut {} -> notImplemented "ConPatOut" -- presumably created by renamer?
987− ViewPat NoExtField expr pat -> sitcc $ do
736+ ViewPat NoExt expr pat -> sitcc $ do
988 located expr p_hsExpr
737 located expr p_hsExpr
991 breakpoint
739 breakpoint
992 inci (located pat p_pat)
740 inci (located pat p_pat)
993− SplicePat NoExtField splice -> p_hsSplice splice
741+ SplicePat NoExt splice -> p_hsSplice splice
994− LitPat NoExtField p -> atom p
742+ LitPat NoExt p -> atom p
995− NPat NoExtField v _ _ -> located v (atom . ol_val)
743+ NPat NoExt v _ _ -> located v (atom . ol_val)
996− NPlusKPat NoExtField n k _ _ _ -> sitcc $ do
744+ NPlusKPat NoExt n k _ _ _ -> sitcc $ do
997 p_rdrName n
745 p_rdrName n
998 breakpoint
746 breakpoint
999 inci $ do
747 inci $ do
1000− txt "+"
748+ txt "+ "
1002 located k (atom . ol_val)
749 located k (atom . ol_val)
1003− SigPat NoExtField pat hswc -> do
750+ SigPat hswc pat -> do
1004 located pat p_pat
751 located pat p_pat
1005 p_typeAscription hswc
752 p_typeAscription hswc
1006 CoPat {} -> notImplemented "CoPat" -- apparently created at some later stage
753 CoPat {} -> notImplemented "CoPat" -- apparently created at some later stage
1007− XPat x -> noExtCon x
754+ XPat NoExt -> notImplemented "XPat"
1009p_pat_hsRecField :: HsRecField' (FieldOcc GhcPs) (LPat GhcPs) -> R ()
756p_pat_hsRecField :: HsRecField' (FieldOcc GhcPs) (LPat GhcPs) -> R ()
1010p_pat_hsRecField HsRecField {..} = do
757p_pat_hsRecField HsRecField {..} = do
1011 located hsRecFieldLbl $ \x ->
758 located hsRecFieldLbl $ \x ->
1012 p_rdrName (rdrNameFieldOcc x)
759 p_rdrName (rdrNameFieldOcc x)
1013 unless hsRecPun $ do
760 unless hsRecPun $ do
1016 breakpoint
762 breakpoint
1017 inci (located hsRecFieldArg p_pat)
763 inci (located hsRecFieldArg p_pat)
1019−p_unboxedSum :: BracketStyle -> ConTag -> Arity -> R () -> R ()
1020−p_unboxedSum s tag arity m = do
1021− let before = tag - 1
1022− after = arity - before - 1
1023− args = replicate before Nothing <> [Just m] <> replicate after Nothing
1025− case x :: Maybe (R ()) of
1032− parensHash s $ sep (txt "|") f args
1034p_hsSplice :: HsSplice GhcPs -> R ()
765p_hsSplice :: HsSplice GhcPs -> R ()
1035p_hsSplice = \case
766p_hsSplice = \case
1036− HsTypedSplice NoExtField deco _ expr -> p_hsSpliceTH True expr deco
767+ HsTypedSplice NoExt deco _ expr -> p_hsSpliceTH True expr deco
1037− HsUntypedSplice NoExtField deco _ expr -> p_hsSpliceTH False expr deco
768+ HsUntypedSplice NoExt deco _ expr -> p_hsSpliceTH False expr deco
1038− HsQuasiQuote NoExtField _ quoterName srcSpan str -> do
769+ HsQuasiQuote NoExt _ quoterName srcSpan str -> do
1040 p_rdrName (L srcSpan quoterName)
771 p_rdrName (L srcSpan quoterName)
1042− -- QuasiQuoters often rely on precise custom strings. We cannot do any
773+ -- NOTE QuasiQuoters often rely on precise custom strings. We cannot do
1043− -- formatting here without potentially breaking someone's code.
774+ -- any formatting here without potentially breaking someone's code.
1044 atom str
775 atom str
1045 txt "|]"
776 txt "|]"
1046 HsSpliced {} -> notImplemented "HsSpliced"
777 HsSpliced {} -> notImplemented "HsSpliced"
1047− HsSplicedT {} -> notImplemented "HsSplicedT"
778+ XSplice {} -> notImplemented "XSplice"
1048− XSplice x -> noExtCon x
1050−p_hsSpliceTH ::
780+p_hsSpliceTH
1051− -- | Typed splice?
781+ :: Bool -- ^ Typed splice?
1052− Bool ->
782+ -> LHsExpr GhcPs -- ^ Splice expression
1053− -- | Splice expression
783+ -> SpliceDecoration -- ^ Splice decoration
1054− LHsExpr GhcPs ->
784+ -> R ()
1055− -- | Splice decoration
1056− SpliceDecoration ->
1058p_hsSpliceTH isTyped expr = \case
785p_hsSpliceTH isTyped expr = \case
1059 HasParens -> do
786 HasParens -> do
1060 txt decoSymbol
787 txt decoSymbol
1061− parens N (located expr (sitcc . p_hsExpr))
788+ parens (located expr (sitcc . p_hsExpr))
1062 HasDollar -> do
789 HasDollar -> do
1063 txt decoSymbol
790 txt decoSymbol
1064 located expr (sitcc . p_hsExpr)
791 located expr (sitcc . p_hsExpr)
1065− NoParens ->
792+ NoParens -> do
1066 located expr (sitcc . p_hsExpr)
793 located expr (sitcc . p_hsExpr)
1068 decoSymbol = if isTyped then "$$" else "$"
795 decoSymbol = if isTyped then "$$" else "$"
1070p_hsBracket :: HsBracket GhcPs -> R ()
797p_hsBracket :: HsBracket GhcPs -> R ()
1071p_hsBracket = \case
798p_hsBracket = \case
1072− ExpBr NoExtField expr -> do
799+ ExpBr NoExt expr -> quote "e" (located expr p_hsExpr)
1073− anns <- getEnclosingAnns
800+ PatBr NoExt pat -> quote "p" (located pat p_pat)
1074− let name = case anns of
801+ DecBrL NoExt decls -> quote "d" (p_hsDecls Free decls)
1075− AnnOpenEQ : _ -> ""
802+ DecBrG NoExt _ -> notImplemented "DecBrG" -- result of renamer
1076− _ -> "e"
803+ TypBr NoExt ty -> quote "t" (located ty p_hsType)
1077− quote name (located expr p_hsExpr)
804+ VarBr NoExt isSingleQuote name -> do
1078− PatBr NoExtField pat -> located pat (quote "p" . p_pat)
1079− DecBrL NoExtField decls -> quote "d" (p_hsDecls Free decls)
1080− DecBrG NoExtField _ -> notImplemented "DecBrG" -- result of renamer
1081− TypBr NoExtField ty -> quote "t" (located ty p_hsType)
1082− VarBr NoExtField isSingleQuote name -> do
1083 txt (bool "''" "'" isSingleQuote)
805 txt (bool "''" "'" isSingleQuote)
1084− -- HACK As you can see we use 'noLoc' here to be able to pass name into
806+ p_rdrName (noLoc name)
1085− -- 'p_rdrName' since the latter expects a "located" thing. The problem
807+ TExpBr NoExt expr -> do
1086− -- is that 'VarBr' doesn't provide us with location of the name. This in
1087− -- turn makes it impossible to detect if there are parentheses around
1088− -- it, etc. So we have to add parentheses manually assuming they are
1089− -- necessary for all operators.
1092− (\i -> isPunctuation i || isSymbol i)
1093− (showOutputable (rdrNameOcc name))
1094− && not (doesNotNeedExtraParens name)
1095− wrapper = if isOperator then parens N else id
1096− wrapper $ p_rdrName (noLoc name)
1097− TExpBr NoExtField expr -> do
1098 txt "[||"
808 txt "[||"
1099 breakpoint'
809 breakpoint'
1100 located expr p_hsExpr
810 located expr p_hsExpr
1101 breakpoint'
811 breakpoint'
1102 txt "||]"
812 txt "||]"
1103− XBracket x -> noExtCon x
813+ XBracket {} -> notImplemented "XBracket"
1105 quote :: Text -> R () -> R ()
815 quote :: Text -> R () -> R ()
1106 quote name body = do
816 quote name body = do
@@ -1108,70 +818,16 @@ p_hsBracket = \case
1108 txt name
818 txt name
1110 breakpoint'
820 breakpoint'
1112− dontUseBraces body
822+ breakpoint'
1113− breakpoint'
823+ txt "|]"
1116−-- Print the source text of a string literal while indenting
1119−p_stringLit :: String -> R ()
1121− let s = splitGaps src
1123− txt $ Text.pack (mconcat s)
1125− sitcc $ sep breakpoint (txt . Text.pack) (backslashes s)
1126− in vlayout singleLine multiLine
1128− -- Split a string on gaps (backslash delimited whitespaces)
1130− -- > splitGaps "bar\\ \\fo\\&o" == ["bar", "fo\\&o"]
1131− splitGaps :: String -> [String]
1134− let -- A backslash and a whitespace starts a "gap"
1135− p (Just '\\', _, _) = True
1136− p (_, '\\', Just c) | ghcSpace c = False
1138− in case span p (zipPrevNext s) of
1140− let -- drop the initial '\', any amount of 'ghcSpace', and another '\'
1141− r' = drop 1 . dropWhile ghcSpace . drop 1 $ map orig r
1142− in map orig l : splitGaps r'
1143− -- GHC's definition of whitespaces in strings
1144− -- See: https://gitlab.haskell.org/ghc/ghc/blob/86753475/compiler/parser/Lexer.x#L1653
1145− ghcSpace :: Char -> Bool
1146− ghcSpace c = c <= '\x7f' && is_space c
1147− -- Add backslashes to the inner side of the strings
1149− -- > backslashes ["a", "b", "c"] == ["a\\", "\\b\\", "\\c"]
1150− backslashes :: [String] -> [String]
1151− backslashes (x : y : xs) = (x ++ "\\") : backslashes (('\\' : y) : xs)
1152− backslashes xs = xs
1153− -- Attaches previous and next items to each list element
1154− zipPrevNext :: [a] -> [(Maybe a, a, Maybe a)]
1158− (zip (Nothing : map Just xs) xs)
1159− (map Just (tail xs) ++ repeat Nothing)
1160− in map (\((p, x), n) -> (p, x, n)) z
1163----------------------------------------------------------------------------
825----------------------------------------------------------------------------
1164-- Helpers
826-- Helpers
1166−-- | Return the wrapping function controlling the use of braces according to
1167−-- the current layout.
1168−layoutToBraces :: Layout -> R () -> R ()
1169−layoutToBraces = \case
1170− SingleLine -> useBraces
1173-- | Append each element in both lists with semigroups. If one list is shorter
828-- | Append each element in both lists with semigroups. If one list is shorter
1174-- than the other, return the rest of the longer list unchanged.
829-- than the other, return the rest of the longer list unchanged.
1175liftAppend :: Semigroup a => [a] -> [a] -> [a]
831liftAppend :: Semigroup a => [a] -> [a] -> [a]
1176liftAppend [] [] = []
832liftAppend [] [] = []
1177liftAppend [] (y : ys) = y : ys
833liftAppend [] (y : ys) = y : ys
@@ -1179,15 +835,15 @@ liftAppend (x : xs) [] = x : xs
1179liftAppend (x : xs) (y : ys) = x <> y : liftAppend xs ys
835liftAppend (x : xs) (y : ys) = x <> y : liftAppend xs ys
1181getGRHSSpan :: GRHS GhcPs (Located body) -> SrcSpan
837getGRHSSpan :: GRHS GhcPs (Located body) -> SrcSpan
1182−getGRHSSpan (GRHS NoExtField guards body) =
838+getGRHSSpan (GRHS NoExt _ body) = getLoc body
1183− combineSrcSpans' $ getLoc body :| map getLoc guards
839+getGRHSSpan (XGRHS NoExt) = notImplemented "XGRHS"
1184−getGRHSSpan (XGRHS x) = noExtCon x
1186-- | Place a thing that may have a hanging form. This function handles how
841-- | Place a thing that may have a hanging form. This function handles how
1187-- to separate it from preceding expressions and whether to bump indentation
842-- to separate it from preceding expressions and whether to bump indentation
1188-- depending on what sort of expression we have.
843-- depending on what sort of expression we have.
1189placeHanging :: Placement -> R () -> R ()
845placeHanging :: Placement -> R () -> R ()
1190−placeHanging placement m =
846+placeHanging placement m = do
1191 case placement of
847 case placement of
1192 Hanging -> do
848 Hanging -> do
@@ -1198,165 +854,49 @@ placeHanging placement m =
1199-- | Check if given block contains single expression which has a hanging
855-- | Check if given block contains single expression which has a hanging
1201−blockPlacement ::
857+
1202− (body -> Placement) ->
858+blockPlacement
1203− [LGRHS GhcPs (Located body)] ->
859+ :: (body -> Placement)
1204− Placement
860+ -> [LGRHS GhcPs (Located body)]
1205−blockPlacement placer [L _ (GRHS NoExtField _ (L _ x))] = placer x
861+ -> Placement
862+blockPlacement placer [(L _ (GRHS NoExt _ (L _ x)))] = placer x
1206blockPlacement _ _ = Normal
863blockPlacement _ _ = Normal
1208-- | Check if given command has a hanging form.
865-- | Check if given command has a hanging form.
1209cmdPlacement :: HsCmd GhcPs -> Placement
867cmdPlacement :: HsCmd GhcPs -> Placement
1210cmdPlacement = \case
868cmdPlacement = \case
1211− HsCmdLam NoExtField _ -> Hanging
869+ HsCmdLam NoExt _ -> Hanging
1212− HsCmdCase NoExtField _ _ -> Hanging
870+ HsCmdCase NoExt _ _ -> Hanging
1213− HsCmdDo NoExtField _ -> Hanging
871+ HsCmdDo NoExt _ -> Hanging
1214 _ -> Normal
872 _ -> Normal
1216cmdTopPlacement :: HsCmdTop GhcPs -> Placement
874cmdTopPlacement :: HsCmdTop GhcPs -> Placement
1217cmdTopPlacement = \case
875cmdTopPlacement = \case
1218− HsCmdTop NoExtField (L _ x) -> cmdPlacement x
876+ HsCmdTop NoExt (L _ x) -> cmdPlacement x
1219− XCmdTop x -> noExtCon x
877+ XCmdTop {} -> notImplemented "XCmdTop"
1221-- | Check if given expression has a hanging form.
879-- | Check if given expression has a hanging form.
1222exprPlacement :: HsExpr GhcPs -> Placement
881exprPlacement :: HsExpr GhcPs -> Placement
1223exprPlacement = \case
882exprPlacement = \case
1224− -- Only hang lambdas with single line parameter lists
883+ HsLam NoExt _ -> Hanging
1225− HsLam NoExtField mg -> case mg of
884+ HsLamCase NoExt _ -> Hanging
1226− MG _ (L _ [L _ (Match NoExtField _ (x : xs) _)]) _
885+ HsCase NoExt _ _ -> Hanging
1227− | isOneLineSpan (combineSrcSpans' $ fmap getLoc (x :| xs)) ->
886+ HsDo NoExt DoExpr _ -> Hanging
1228− Hanging
887+ HsDo NoExt MDoExpr _ -> Hanging
1229− _ -> Normal
888+ RecordCon NoExt _ _ -> Hanging
1230− HsLamCase NoExtField _ -> Hanging
889+ HsProc NoExt (L s _) _ ->
1231− HsCase NoExtField _ _ -> Hanging
890+ -- Indentation breaks if pattern is longer than one line and left hanging.
1232− HsDo NoExtField DoExpr _ -> Hanging
891+ -- Consequentally, once apply hanging when it is safe.
1233− HsDo NoExtField MDoExpr _ -> Hanging
892+ if isOneLineSpan s
1234− OpApp NoExtField _ op y ->
893+ then Hanging
1235− case (fmap getOpNameStr . getOpName . unLoc) op of
894+ else Normal
1236− Just "$" -> exprPlacement (unLoc y)
1238− HsApp NoExtField _ y -> exprPlacement (unLoc y)
1239− HsProc NoExtField p _ ->
1240− -- Indentation breaks if pattern is longer than one line and left
1241− -- hanging. Consequently, only apply hanging when it is safe.
1242− if isOneLineSpan (getLoc p)
1245 _ -> Normal
895 _ -> Normal
1247withGuards :: [LGRHS GhcPs (Located body)] -> Bool
897withGuards :: [LGRHS GhcPs (Located body)] -> Bool
1248withGuards = any (checkOne . unLoc)
898withGuards = any (checkOne . unLoc)
1250 checkOne :: GRHS GhcPs (Located body) -> Bool
900 checkOne :: GRHS GhcPs (Located body) -> Bool
1251− checkOne (GRHS NoExtField [] _) = False
901+ checkOne (GRHS NoExt [] _) = False
1252 checkOne _ = True
902 checkOne _ = True
1254−exprOpTree :: LHsExpr GhcPs -> OpTree (LHsExpr GhcPs) (LHsExpr GhcPs)
1255−exprOpTree (L _ (OpApp NoExtField x op y)) = OpBranch (exprOpTree x) op (exprOpTree y)
1256−exprOpTree n = OpNode n
1258−getOpName :: HsExpr GhcPs -> Maybe RdrName
1260− HsVar NoExtField (L _ a) -> Just a
1263−getOpNameStr :: RdrName -> String
1264−getOpNameStr = occNameString . rdrNameOcc
1267− -- | Bracket style to use
1269− OpTree (LHsExpr GhcPs) (LHsExpr GhcPs) ->
1271−p_exprOpTree s (OpNode x) = located x (p_hsExpr' s)
1272−p_exprOpTree s (OpBranch x op y) = do
1273− -- If the beginning of the first argument and the second argument are on
1274− -- the same line, and the second argument has a hanging form, use hanging
1278− (mkSrcSpan (srcSpanStart (opTreeLoc x)) (srcSpanStart (opTreeLoc y)))
1280− OpNode (L _ n) -> exprPlacement n
1283− -- Distinguish holes used in infix notation.
1284− -- eg. '1 _foo 2' and '1 `_foo` 2'
1285− opWrapper = case unLoc op of
1286− HsUnboundVar NoExtField _ -> backticks
1288− layout <- getLayout
1289− let ub = case layout of
1290− SingleLine -> useBraces
1291− MultiLine -> case placement of
1292− Hanging -> useBraces
1293− Normal -> dontUseBraces
1294− opNameStr = (fmap getOpNameStr . getOpName . unLoc) op
1295− gotDollar = opNameStr == Just "$"
1296− gotColon = opNameStr == Just ":"
1297− gotRecordDot = isRecordDot (unLoc op) (opTreeLoc y)
1299− switchLayout [opTreeLoc x] $
1301− p_op = located op (opWrapper . p_hsExpr)
1302− p_y = switchLayout [opTreeLoc y] (p_exprOpTree N y)
1303− isSection = case (opTreeLoc x, getLoc op) of
1304− (RealSrcSpan treeSpan, RealSrcSpan opSpan) ->
1305− srcSpanEndCol treeSpan /= srcSpanStartCol opSpan
1308− OpNode (L _ HsDo {}) -> True
1310− useRecordDot' <- useRecordDot
1322− inciIf (isDoBlock y) p_y
1324− && isOneLineSpan (opTreeLoc x)
1325− && placement == Normal -> do
1331− | useRecordDot' && gotRecordDot -> do
1333− when isSection space
1338− placeHanging placement $ do
1343−-- | Return 'True' if given expression is a record-dot operator expression.
1345− -- | Operator expression
1347− -- | Span of the expression on the right-hand side of the operator
1350−isRecordDot op (RealSrcSpan ySpan) = case op of
1351− HsVar NoExtField (L (RealSrcSpan opSpan) opName) ->
1352− (getOpNameStr opName == ".") && (srcSpanEndCol opSpan == srcSpanStartCol ySpan)
1354−isRecordDot _ _ = False
1356−-- | Get annotations for the enclosing element.
1357−getEnclosingAnns :: R [AnnKeywordId]
1358−getEnclosingAnns = do
1359− e <- getEnclosingSpan (const True)
1361− Nothing -> return []
1362− Just e' -> getAnns (RealSrcSpan e')