@@ -1,43 +1,34 @@
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)
17+import Data.Char (isPunctuation)
22import Data.Data hiding (Infix, Prefix)
18import Data.Data hiding (Infix, Prefix)
23−import Data.Functor ((<&>))
24import Data.List (intersperse, sortOn)
19import Data.List (intersperse, sortOn)
25−import Data.List.NonEmpty (NonEmpty (..), (<|))
26−import qualified Data.List.NonEmpty as NE
27import Data.Text (Text)
20import Data.Text (Text)
28−import qualified Data.Text as Text
30−import OccName (occNameString)
31import Ormolu.Printer.Combinators
22import Ormolu.Printer.Combinators
32−import Ormolu.Printer.Internal
33import Ormolu.Printer.Meat.Common
23import Ormolu.Printer.Meat.Common
34−import {-# SOURCE #-} Ormolu.Printer.Meat.Declaration
35import Ormolu.Printer.Meat.Declaration.Signature
24import Ormolu.Printer.Meat.Declaration.Signature
36import Ormolu.Printer.Meat.Type
25import Ormolu.Printer.Meat.Type
37−import Ormolu.Printer.Operators
38import Ormolu.Utils
26import Ormolu.Utils
27+import Outputable (Outputable (..))
28+import SrcLoc (combineSrcSpans, isOneLineSpan)
29+import qualified Data.List.NonEmpty as NE
30+import {-# SOURCE #-} Ormolu.Printer.Meat.Declaration
40−-- | Style of a group of equations.
41data MatchGroupStyle
32data MatchGroupStyle
42 = Function (Located RdrName)
33 = Function (Located RdrName)
43 | PatternBind
34 | PatternBind
@@ -45,132 +36,87 @@ data MatchGroupStyle
46 | LambdaCase
37 | LambdaCase
48−-- | Style of equations in a group.
49data GroupStyle
39data GroupStyle
50 = EqualSign
40 = EqualSign
51 | RightArrow
41 | RightArrow
53-- | Expression placement. This marks the places where expressions that
43-- | Expression placement. This marks the places where expressions that
54-- implement handing forms may use them.
44-- implement handing forms may use them.
55data Placement
46data Placement
56− = -- | Multi-line layout should cause
47+ = Normal -- ^ Multi-line layout should cause
57− -- insertion of a newline and indentation
48+ -- insertion of a newline and indentation
60− | -- | Expressions that have hanging form
50+ | Hanging -- ^ Expressions that have hanging form
61− -- should use it and avoid bumping one level
51+ -- should use it and avoid bumping one level
62− -- of indentation
52+ -- of indentation
66p_valDecl :: HsBindLR GhcPs GhcPs -> R ()
54p_valDecl :: HsBindLR GhcPs GhcPs -> R ()
67−p_valDecl = \case
55+p_valDecl = line . p_valDecl'
57+p_valDecl' :: HsBindLR GhcPs GhcPs -> R ()
68− FunBind NoExtField funId funMatches _ _ -> p_funBind funId funMatches
59+ FunBind NoExt funId funMatches _ _ -> p_funBind funId funMatches
69− PatBind NoExtField pat grhss _ -> p_match PatternBind False NoSrcStrict [pat] grhss
60+ PatBind NoExt pat grhss _ -> p_match PatternBind False NoSrcStrict [pat] grhss
70 VarBind {} -> notImplemented "VarBinds" -- introduced by the type checker
61 VarBind {} -> notImplemented "VarBinds" -- introduced by the type checker
71 AbsBinds {} -> notImplemented "AbsBinds" -- introduced by the type checker
62 AbsBinds {} -> notImplemented "AbsBinds" -- introduced by the type checker
72− PatSynBind NoExtField psb -> p_patSynBind psb
63+ PatSynBind NoExt psb -> p_patSynBind psb
73− XHsBindsLR x -> noExtCon x
64+ XHsBindsLR NoExt -> notImplemented "XHsBindsLR"
75−p_funBind ::
66+p_funBind
76− Located RdrName ->
67+ :: Located RdrName
77− MatchGroup GhcPs (LHsExpr GhcPs) ->
68+ -> MatchGroup GhcPs (LHsExpr GhcPs)
70+p_funBind name mgroup =
79−p_funBind name = p_matchGroup (Function name)
71+ p_matchGroup (Function name) mgroup
81−p_matchGroup ::
73+p_matchGroup
82− MatchGroupStyle ->
74+ :: MatchGroupStyle
83− MatchGroup GhcPs (LHsExpr GhcPs) ->
75+ -> MatchGroup GhcPs (LHsExpr GhcPs)
85p_matchGroup = p_matchGroup' exprPlacement p_hsExpr
77p_matchGroup = p_matchGroup' exprPlacement p_hsExpr
87−p_matchGroup' ::
79+p_matchGroup'
88− Data body =>
80+ :: Data body
89− -- | How to get body placement
90− (body -> Placement) ->
81+ => (body -> Placement)
91− -- | How to print body
92− (body -> R ()) ->
82+ -> (body -> R ())
93− -- | Style of this group of equations
83+ -> MatchGroupStyle
96− MatchGroup GhcPs (Located body) ->
84+ -> MatchGroup GhcPs (Located body)
98−p_matchGroup' placer render style MG {..} = do
86+p_matchGroup' placer pretty style MG {..} =
99− let ob = case style of
87+ locatedVia Nothing mg_alts $
100− Case -> id
88+ newlineSep (located' (\m@Match {..} ->
101− LambdaCase -> id
89+ p_match' placer pretty style (isInfixMatch m) (matchStrictness m) m_pats m_grhss))
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
90+p_matchGroup' _ _ _ (XMatchGroup NoExt) = notImplemented "XMatchGroup"
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
92matchStrictness :: Match id body -> SrcStrictness
135matchStrictness match =
93matchStrictness match =
136 case m_ctxt match of
94 case m_ctxt match of
137− FunRhs {mc_strictness = s} -> s
95+ FunRhs{mc_strictness=s} -> s
138 _ -> NoSrcStrict
96 _ -> NoSrcStrict
141− -- | Style of the group
142− MatchGroupStyle ->
99+ :: MatchGroupStyle
143− -- | Is this an infix match?
100+ -> Bool -- ^ Is this an infix match?
145− -- | Strictness prefix (FunBind)
101+ -> SrcStrictness -- ^ Strictness prefix (FunBind)
147− -- | Argument patterns
148− [LPat GhcPs] ->
102+ -> [LPat GhcPs]
150− GRHSs GhcPs (LHsExpr GhcPs) ->
103+ -> GRHSs GhcPs (LHsExpr GhcPs)
152p_match = p_match' exprPlacement p_hsExpr
105p_match = p_match' exprPlacement p_hsExpr
154−p_match' ::
107+p_match'
155− Data body =>
108+ :: Data body
156− -- | How to get body placement
157− (body -> Placement) ->
109+ => (body -> Placement)
158− -- | How to print body
159− (body -> R ()) ->
110+ -> (body -> R ())
160− -- | Style of this group of equations
161− MatchGroupStyle ->
111+ -> MatchGroupStyle
162− -- | Is this an infix match?
112+ -> Bool -- ^ Is this an infix match?
164− -- | Strictness prefix (FunBind)
113+ -> SrcStrictness -- ^ Strictness prefix (FunBind)
166− -- | Argument patterns
167− [LPat GhcPs] ->
114+ -> [LPat GhcPs]
169− GRHSs GhcPs (Located body) ->
115+ -> GRHSs GhcPs (Located body)
171−p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
117+p_match' placer pretty style isInfix strictness m_pats m_grhss = do
172− -- Normally, since patterns may be placed in a multi-line layout, it is
118+ -- NOTE Normally, since patterns may be placed in a multi-line layout, it
173− -- necessary to bump indentation for the pattern group so it's more
119+ -- is necessary to bump indentation for the pattern group so it's more
174 -- indented than function name. This in turn means that indentation for
120 -- indented than function name. This in turn means that indentation for
175 -- the body should also be bumped. Normally this would mean that bodies
121 -- 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
122 -- would start with two indentation steps applied, which is ugly, so we
@@ -180,24 +126,23 @@ p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
180 NoSrcStrict -> return ()
126 NoSrcStrict -> return ()
181 SrcStrict -> txt "!"
127 SrcStrict -> txt "!"
182 SrcLazy -> txt "~"
128 SrcLazy -> txt "~"
183− indentBody <- case NE.nonEmpty m_pats of
129+ inci' <- case NE.nonEmpty m_pats of
185− False <$ case style of
130+ Nothing -> id <$ case style of
186− Function name -> p_rdrName name
131+ Function name -> p_rdrName name
187− _ -> return ()
132+ _ -> return ()
188 Just ne_pats -> do
133 Just ne_pats -> do
189− let combinedSpans = case style of
134+ let combinedSpans = combineSrcSpans' $
190− Function name -> combineSrcSpans (getLoc name) patSpans
192− patSpans = combineSrcSpans' (getLoc <$> ne_pats)
135+ getLoc <$> ne_pats
193− indentBody = not (isOneLineSpan combinedSpans)
136+ inci' = if isOneLineSpan combinedSpans
194− switchLayout [combinedSpans] $ do
139+ switchLayout combinedSpans $ do
195− let stdCase = sep breakpoint (located' p_pat) m_pats
140+ let stdCase = velt' (located' p_pat <$> m_pats)
196 case style of
141 case style of
197 Function name ->
142 Function name ->
198 p_infixDefHelper
143 p_infixDefHelper
200− indentBody
145+ inci'
201 (p_rdrName name)
146 (p_rdrName name)
202 (located' p_pat <$> m_pats)
147 (located' p_pat <$> m_pats)
203 PatternBind -> stdCase
148 PatternBind -> stdCase
@@ -208,256 +153,225 @@ p_match' placer render style isInfix strictness m_pats GRHSs {..} = do
208 BangPat _ _ -> True
153 BangPat _ _ -> True
209 SplicePat _ _ -> True
154 SplicePat _ _ -> True
210 _ -> False
155 _ -> False
212− when needsSpace space
156+ txt (if needsSpace then "\\ " else "\\")
213− sitcc stdCase
157+ stdCase
214 LambdaCase -> stdCase
158 LambdaCase -> stdCase
215− return indentBody
159+ return inci'
216− let -- Calculate position of end of patterns. This is useful when we decide
162+ -- Calculate position of end of patterns. This is useful when we decide
217− -- about putting certain constructions in hanging positions.
163+ -- about putting certain constructions in hanging positions.
218− endOfPats = case NE.nonEmpty m_pats of
164+ endOfPats = case NE.nonEmpty m_pats of
219− Nothing -> case style of
165+ Nothing -> case style of
220− Function name -> Just (getLoc name)
166+ Function name -> (Just . srcSpanEnd . getLoc) name
221− _ -> Nothing
167+ _ -> Nothing
222− Just pats -> (Just . getLoc . NE.last) pats
168+ Just pats -> (Just . srcSpanEnd . getLoc . NE.last) pats
223− isCase = \case
169+ isCase = \case
224− Case -> True
170+ Case -> True
225− LambdaCase -> True
171+ LambdaCase -> True
226− _ -> False
172+ _ -> False
174+ let GRHSs {..} = m_grhss
227− hasGuards = withGuards grhssGRHSs
175+ hasGuards = withGuards grhssGRHSs
230− getGRHSSpan . unLoc <$> NE.fromList grhssGRHSs
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) $
176+ unless (length grhssGRHSs > 1) $ do
258 case style of
177 case style of
259 Function _ | hasGuards -> return ()
178 Function _ | hasGuards -> return ()
260− Function _ -> space >> inci equals
179+ Function _ -> txt " ="
261− PatternBind -> space >> inci equals
180+ PatternBind -> txt " ="
262 s | isCase s && hasGuards -> return ()
181 s | isCase s && hasGuards -> return ()
263− _ -> space >> txt "->"
182+ _ -> txt " ->"
183+ let grhssSpan = combineSrcSpans' $
184+ getGRHSSpan . unLoc <$> NE.fromList grhssGRHSs
264− switchLayout [patGrhssSpan] $
185+ patGrhssSpan = maybe grhssSpan
265− placeHanging placement p_body
186+ (combineSrcSpans grhssSpan . srcLocSpan) endOfPats
266− inci p_where
187+ placement =
267−p_match' _ _ _ _ _ _ (XGRHSs x) = noExtCon x
188+ case endOfPats of
189+ Nothing -> blockPlacement placer grhssGRHSs
192+ (mkSrcSpan spn (srcSpanStart grhssSpan))
193+ then blockPlacement placer grhssGRHSs
195+ inciLocalBinds = case placement of
200+ if isCase style && hasGuards
203+ newlineSep (located' (p_grhs' pretty groupStyle)) grhssGRHSs
204+ let whereLocation = combineSrcSpans patGrhssSpan $ getLoc grhssLocalBinds
205+ whereIsEmpty = GHC.isEmptyLocalBindsPR (unLoc grhssLocalBinds)
206+ unless (GHC.eqEmptyLocalBinds (unLoc grhssLocalBinds))
208+ . switchLayout whereLocation $ do
209+ if whereIsEmpty then newline else breakpoint
211+ unless whereIsEmpty $ do
213+ inci (located grhssLocalBinds p_hsLocalBinds)
215+ Lambda -> placeHanging placement $
216+ switchLayout patGrhssSpan p_body
217+ _ -> switchLayout patGrhssSpan $
218+ placeHanging placement p_body
269p_grhs :: GroupStyle -> GRHS GhcPs (LHsExpr GhcPs) -> R ()
220p_grhs :: GroupStyle -> GRHS GhcPs (LHsExpr GhcPs) -> R ()
270−p_grhs = p_grhs' exprPlacement p_hsExpr
221+p_grhs = p_grhs' p_hsExpr
272−p_grhs' ::
223+p_grhs'
273− Data body =>
224+ :: Data body
274− -- | How to get body placement
275− (body -> Placement) ->
276− -- | How to print body
277− (body -> R ()) ->
225+ => (body -> R ())
278− GroupStyle ->
226+ -> GroupStyle
279− GRHS GhcPs (Located body) ->
227+ -> GRHS GhcPs (Located body)
281−p_grhs' placer render style (GRHS NoExtField guards body) =
229+p_grhs' pretty style (GRHS NoExt guards body) =
282 case guards of
230 case guards of
283 [] -> p_body
231 [] -> p_body
285− txt "|"
233+ txt "| "
234+ velt $ withSep comma (located' p_stmt) xs
287− sitcc (sep commaDel (sitcc . located' p_stmt) xs)
289− inci $ case style of
236+ txt $ case style of
290− EqualSign -> equals
237+ EqualSign -> "="
291− RightArrow -> txt "->"
238+ RightArrow -> "->"
292− placeHanging placement p_body
239+ breakpoint
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
242+ p_body = located body pretty
306−p_grhs' _ _ _ (XGRHS x) = noExtCon x
243+p_grhs' _ _ (XGRHS NoExt) = notImplemented "XGRHS"
308p_hsCmd :: HsCmd GhcPs -> R ()
245p_hsCmd :: HsCmd GhcPs -> R ()
309p_hsCmd = \case
246p_hsCmd = \case
310− HsCmdArrApp NoExtField body input arrType _ -> do
247+ HsCmdArrApp NoExt body input arrType _ -> do
311 located body p_hsExpr
248 located body p_hsExpr
314− case arrType of
249+ txt $ case arrType of
315− HsFirstOrderApp -> txt "-<"
250+ HsFirstOrderApp -> " -<"
316− HsHigherOrderApp -> txt "-<<"
251+ HsHigherOrderApp -> " -<<"
317− placeHanging (exprPlacement (unLoc input)) $
252+ placeHanging (exprPlacement (unLoc input)) $
318− located input p_hsExpr
253+ located input p_hsExpr
319− HsCmdArrForm NoExtField form Prefix _ cmds -> banana $ do
254+ HsCmdArrForm NoExt form Prefix _ cmds -> banana $ sitcc $ do
320 located form p_hsExpr
255 located form p_hsExpr
321− unless (null cmds) $ do
256+ unless (null cmds) $ do
322 breakpoint
257 breakpoint
323 inci (sequence_ (intersperse breakpoint (located' p_hsCmdTop <$> cmds)))
258 inci (sequence_ (intersperse breakpoint (located' p_hsCmdTop <$> cmds)))
324− HsCmdArrForm NoExtField form Infix _ [left, right] -> do
259+ HsCmdArrForm NoExt form Infix _ [left, right] -> do
325 located left p_hsCmdTop
260 located left p_hsCmdTop
327 located form p_hsExpr
262 located form p_hsExpr
328 placeHanging (cmdTopPlacement (unLoc right)) $
263 placeHanging (cmdTopPlacement (unLoc right)) $
329 located right p_hsCmdTop
264 located right p_hsCmdTop
330− HsCmdArrForm NoExtField _ Infix _ _ -> notImplemented "HsCmdArrForm"
265+ HsCmdArrForm NoExt _ Infix _ _ -> notImplemented "HsCmdArrForm"
331 HsCmdApp {} ->
266 HsCmdApp {} ->
332 -- XXX Does this ever occur in the syntax tree? It does not seem like it
267 -- 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.
268 -- does. Open an issue and ping @yumiova if this ever occurs in output.
334 notImplemented "HsCmdApp"
269 notImplemented "HsCmdApp"
335− HsCmdLam NoExtField mgroup -> p_matchGroup' cmdPlacement p_hsCmd Lambda mgroup
270+ HsCmdLam NoExt mgroup -> p_matchGroup' cmdPlacement p_hsCmd Lambda mgroup
336− HsCmdPar NoExtField c -> parens N (located c p_hsCmd)
271+ HsCmdPar NoExt c -> parens (located c p_hsCmd)
337− HsCmdCase NoExtField e mgroup ->
272+ HsCmdCase NoExt e mgroup -> do
338− p_case cmdPlacement p_hsCmd e mgroup
277+ inci (p_matchGroup' cmdPlacement p_hsCmd Case mgroup)
339− HsCmdIf NoExtField _ if' then' else' ->
278+ HsCmdIf NoExt _ if' then' else' -> do
340− p_if cmdPlacement p_hsCmd if' then' else'
279+ txt "if "
280+ located if' p_hsExpr
283+ located then' $ \x -> do
288+ located else' $ \x -> do
341− HsCmdLet NoExtField localBinds c ->
291+ HsCmdLet NoExt localBinds c -> do
342− p_let p_hsCmd localBinds c
292+ txt "let "
293+ sitcc (located localBinds p_hsLocalBinds)
296+ sitcc (located c p_hsCmd)
343− HsCmdDo NoExtField es -> do
297+ HsCmdDo NoExt es -> do
346− inci . located es $
300+ 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"
301 HsCmdWrap {} -> notImplemented "HsCmdWrap"
349− XCmd x -> noExtCon x
302+ XCmd {} -> notImplemented "XCmd"
351p_hsCmdTop :: HsCmdTop GhcPs -> R ()
304p_hsCmdTop :: HsCmdTop GhcPs -> R ()
352p_hsCmdTop = \case
305p_hsCmdTop = \case
353− HsCmdTop NoExtField cmd -> located cmd p_hsCmd
306+ HsCmdTop NoExt cmd -> located cmd p_hsCmd
354− XCmdTop x -> noExtCon x
307+ 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 ()
309p_stmt :: Stmt GhcPs (LHsExpr GhcPs) -> R ()
386−p_stmt = p_stmt' exprPlacement p_hsExpr
310+p_stmt = p_stmt' p_hsExpr
388−p_stmt' ::
312+p_stmt'
389− Data body =>
313+ :: Data body
391− (body -> Placement) ->
314+ => (body -> R ())
394− -- | Statement to render
395− Stmt GhcPs (Located body) ->
315+ -> Stmt GhcPs (Located body)
397−p_stmt' placer render = \case
317+p_stmt' pretty = \case
398− LastStmt NoExtField body _ _ -> located body render
318+ LastStmt NoExt body _ _ -> located body pretty
399− BindStmt NoExtField p f _ _ -> do
319+ BindStmt NoExt l f _ _ -> do
400− located p p_pat
320+ located l p_pat
403− let loc = getLoc p
323+ breakpoint
404− placement =
324+ 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
325 ApplicativeStmt {} -> notImplemented "ApplicativeStmt" -- generated by renamer
414− BodyStmt NoExtField body _ _ -> located body render
326+ BodyStmt NoExt body _ _ -> located body pretty
415− LetStmt NoExtField binds -> do
327+ LetStmt NoExt binds -> do
416− txt "let"
328+ txt "let "
418 sitcc $ located binds p_hsLocalBinds
329 sitcc $ located binds p_hsLocalBinds
419 ParStmt {} ->
330 ParStmt {} ->
420− -- 'ParStmt' should always be eliminated in 'gatherStmt' already, such
331+ -- NOTE 'ParStmt' should always be eliminated in 'gatherStmt' already,
421− -- that it never occurs in 'p_stmt''. Consequently, handling it here
332+ -- such that it never occurs in 'p_stmt''. Consequently, handling it
422− -- would be redundant.
333+ -- here would be redundant.
423 notImplemented "ParStmt"
334 notImplemented "ParStmt"
424− TransStmt {..} ->
335+ TransStmt {..} -> do
425− -- 'TransStmt' only needs to account for render printing itself, since
336+ -- NOTE 'TransStmt' only needs to account for pretty printing itself,
426− -- pretty printing of relevant statements (e.g., in 'trS_stmts') is
337+ -- since pretty printing of relevant statements (e.g., in 'trS_stmts')
427− -- handled through 'gatherStmt'.
338+ -- is handled through 'gatherStmt'.
428 case (trS_form, trS_by) of
339 case (trS_form, trS_by) of
429− (ThenForm, Nothing) -> do
340+ (ThenForm, Nothing) -> located trS_using $ \x -> do
430 txt "then"
341 txt "then"
431 breakpoint
342 breakpoint
432− inci $ located trS_using p_hsExpr
343+ inci (p_hsExpr x)
433 (ThenForm, Just e) -> do
344 (ThenForm, Just e) -> do
436− inci $ located trS_using p_hsExpr
345+ located trS_using $ \x -> do
437− breakpoint
346+ txt "then"
438− txt "by"
347+ breakpoint
439 breakpoint
349 breakpoint
440− inci $ located e p_hsExpr
350+ located e $ \x -> do
441− (GroupForm, Nothing) -> do
354+ (GroupForm, Nothing) -> located trS_using $ \x -> do
442 txt "then group using"
355 txt "then group using"
443 breakpoint
356 breakpoint
444− inci $ located trS_using p_hsExpr
357+ inci (p_hsExpr x)
445 (GroupForm, Just e) -> do
358 (GroupForm, Just e) -> do
359+ located e $ \x -> do
446− txt "then group by"
360+ txt "then group by"
447− breakpoint
361+ breakpoint
448− inci $ located e p_hsExpr
362+ inci (p_hsExpr x)
451 breakpoint
363 breakpoint
452− inci $ located trS_using p_hsExpr
364+ located trS_using $ \x -> do
453 RecStmt {..} -> do
368 RecStmt {..} -> do
454− txt "rec"
369+ txt "rec "
456− sitcc $ sepSemi (withSpacing (p_stmt' placer render)) recS_stmts
370+ sitcc $ newlineSep (located' (p_stmt' pretty)) recS_stmts
457− XStmtLR c -> noExtCon c
371+ XStmtLR {} -> notImplemented "XStmtLR"
459gatherStmt :: ExprLStmt GhcPs -> [[ExprLStmt GhcPs]]
373gatherStmt :: ExprLStmt GhcPs -> [[ExprLStmt GhcPs]]
460−gatherStmt (L _ (ParStmt NoExtField block _ _)) =
374+gatherStmt (L _ (ParStmt NoExt block _ _)) =
461 foldr ((<>) . gatherStmtBlock) [] block
375 foldr ((<>) . gatherStmtBlock) [] block
462gatherStmt (L s stmt@TransStmt {..}) =
376gatherStmt (L s stmt@TransStmt {..}) =
463 foldr liftAppend [] ((gatherStmt <$> trS_stmts) <> pure [[L s stmt]])
377 foldr liftAppend [] ((gatherStmt <$> trS_stmts) <> pure [[L s stmt]])
@@ -466,620 +380,429 @@ gatherStmt stmt = [[stmt]]
466gatherStmtBlock :: ParStmtBlock GhcPs GhcPs -> [[ExprLStmt GhcPs]]
380gatherStmtBlock :: ParStmtBlock GhcPs GhcPs -> [[ExprLStmt GhcPs]]
467gatherStmtBlock (ParStmtBlock _ stmts _ _) =
381gatherStmtBlock (ParStmtBlock _ stmts _ _) =
468 foldr (liftAppend . gatherStmt) [] stmts
382 foldr (liftAppend . gatherStmt) [] stmts
469−gatherStmtBlock (XParStmtBlock x) = noExtCon x
383+gatherStmtBlock XParStmtBlock {} = notImplemented "XParStmtBlock"
471p_hsLocalBinds :: HsLocalBindsLR GhcPs GhcPs -> R ()
385p_hsLocalBinds :: HsLocalBindsLR GhcPs GhcPs -> R ()
472p_hsLocalBinds = \case
386p_hsLocalBinds = \case
473− HsValBinds NoExtField (ValBinds NoExtField bag lsigs) -> do
387+ HsValBinds NoExt (ValBinds NoExt bag lsigs) -> do
474− -- When in a single-line layout, there is a chance that the inner
388+ let ssStart = either
475− -- elements will also contain semicolons and they will confuse the
389+ (srcSpanStart . getLoc)
476− -- parser. so we request braces around every element except the last.
390+ (srcSpanStart . getLoc)
477− br <- layoutToBraces <$> getLayout
391+ items =
479− let injectLeft (L l x) = L l (Left x)
480− injectRight (L l x) = L l (Right x)
481− in (injectLeft <$> bagToList bag) ++ (injectRight <$> lsigs)
392+ (Left <$> bagToList bag) ++ (Right <$> lsigs)
482− positionToBracing = \case
393+ p_item (Left x) = located x p_valDecl'
483− SinglePos -> id
394+ p_item (Right x) = located x p_sigDecl'
484− FirstPos -> br
395+ newlineSep (sitcc . p_item) (sortOn ssStart items)
488− positionToBracing p $
489− withSpacing (either p_valDecl p_sigDecl) item
490− binds = sortOn (srcSpanStart . getLoc) items
491− sitcc $ sepSemi p_item' (attachRelativePos binds)
492− HsValBinds NoExtField _ -> notImplemented "HsValBinds"
396+ HsValBinds NoExt _ -> notImplemented "HsValBinds"
493− HsIPBinds NoExtField (IPBinds NoExtField xs) ->
397+ HsIPBinds NoExt _ -> notImplemented "HsIPBinds"
494− -- Second argument of IPBind is always Left before type-checking.
495− let p_ipBind (IPBind NoExtField (Left name) expr) = do
500− useBraces $ inci $ located expr p_hsExpr
501− p_ipBind (IPBind NoExtField (Right _) _) =
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 ()
398+ EmptyLocalBinds NoExt -> return ()
508− XHsLocalBindsLR x -> noExtCon x
399+ XHsLocalBindsLR _ -> notImplemented "XHsLocalBindsLR"
510−p_hsRecField ::
401+p_hsRecField
402+ :: (Data id, Outputable id)
511− HsRecField' RdrName (LHsExpr GhcPs) ->
403+ => HsRecField' id (LHsExpr GhcPs)
513−p_hsRecField HsRecField {..} = do
405+p_hsRecField = \HsRecField {..} -> do
514− p_rdrName hsRecFieldLbl
406+ located hsRecFieldLbl atom
515− unless hsRecPun $ do
407+ unless hsRecPun $ do
517− equals
409+ located hsRecFieldArg p_hsExpr
519− if onTheSameLine (getLoc hsRecFieldLbl) (getLoc hsRecFieldArg)
411+p_hsTupArg :: HsTupArg GhcPs -> R ()
520− then exprPlacement (unLoc hsRecFieldArg)
412+p_hsTupArg = \case
521− else Normal
413+ Present NoExt x -> located x p_hsExpr
522− placeHanging placement (located hsRecFieldArg p_hsExpr)
414+ Missing NoExt -> pure ()
415+ XTupArg {} -> notImplemented "XTupArg"
524p_hsExpr :: HsExpr GhcPs -> R ()
417p_hsExpr :: HsExpr GhcPs -> R ()
525−p_hsExpr = p_hsExpr' N
418+p_hsExpr = \case
527−p_hsExpr' :: BracketStyle -> HsExpr GhcPs -> R ()
529− HsVar NoExtField name -> p_rdrName name
419+ HsVar NoExt name -> p_rdrName name
530− HsUnboundVar NoExtField v -> atom (unboundVarOcc v)
420+ HsUnboundVar NoExt _ -> notImplemented "HsUnboundVar"
531− HsConLikeOut NoExtField _ -> notImplemented "HsConLikeOut"
421+ HsConLikeOut NoExt _ -> notImplemented "HsConLikeOut"
532− HsRecFld NoExtField x ->
422+ HsRecFld NoExt x ->
533 case x of
423 case x of
534− Unambiguous NoExtField name -> p_rdrName name
424+ Unambiguous NoExt name -> p_rdrName name
535− Ambiguous NoExtField name -> p_rdrName name
425+ Ambiguous NoExt name -> p_rdrName name
536− XAmbiguousFieldOcc xx -> noExtCon xx
426+ XAmbiguousFieldOcc NoExt -> notImplemented "XAmbiguousFieldOcc"
537− HsOverLabel NoExtField _ v -> do
427+ HsOverLabel NoExt _ v -> do
540− HsIPVar NoExtField (HsIPName name) -> do
430+ HsIPVar NoExt (HsIPName name) -> do
542 atom name
432 atom name
543− HsOverLit NoExtField v -> atom (ol_val v)
433+ HsOverLit NoExt v -> atom (ol_val v)
544− HsLit NoExtField lit ->
434+ HsLit NoExt lit -> atom lit
546− HsString (SourceText stxt) _ -> p_stringLit stxt
547− HsStringPrim (SourceText stxt) _ -> p_stringLit stxt
549− HsLam NoExtField mgroup ->
435+ HsLam NoExt mgroup ->
550 p_matchGroup Lambda mgroup
436 p_matchGroup Lambda mgroup
551− HsLamCase NoExtField mgroup -> do
437+ HsLamCase NoExt mgroup -> do
552 txt "\\case"
438 txt "\\case"
553− breakpoint
439+ newline
554 inci (p_matchGroup LambdaCase mgroup)
440 inci (p_matchGroup LambdaCase mgroup)
555− HsApp NoExtField f x -> do
441+ HsApp NoExt f x -> do
556− let -- In order to format function applications with multiple parameters
442+ located f p_hsExpr
557− -- nicer, traverse the AST to gather the function and all the
443+ breakpoint
558− -- parameters together.
559− gatherArgs f' knownArgs =
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)
444+ inci (located x p_hsExpr)
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
445+ HsAppType a e -> do
612 located e p_hsExpr
446 located e p_hsExpr
613 breakpoint
447 breakpoint
614 inci $ do
448 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
450 located (hswc_body a) p_hsType
622− OpApp NoExtField x op y -> do
451+ OpApp NoExt x op y -> do
623− let opTree = OpBranch (exprOpTree x) op (exprOpTree y)
452+ located x p_hsExpr
624− p_exprOpTree s (reassociateOpTree getOpName opTree)
625− NegApp NoExtField e _ -> do
454+ let opWrapper = case unLoc op of
455+ EWildPat NoExt -> backticks
457+ located op (opWrapper . p_hsExpr)
458+ placeHanging (exprPlacement (unLoc y)) $
460+ NegApp NoExt e _ -> do
628 located e p_hsExpr
462 located e p_hsExpr
629− HsPar NoExtField e ->
630− parens s (located e (dontUseBraces . p_hsExpr))
463+ HsPar NoExt e -> parens (located e p_hsExpr)
631− SectionL NoExtField x op -> do
464+ SectionL NoExt x op -> do
632 located x p_hsExpr
465 located x p_hsExpr
633 breakpoint
466 breakpoint
634 inci (located op p_hsExpr)
467 inci (located op p_hsExpr)
635− SectionR NoExtField op x -> do
468+ SectionR NoExt op x -> do
636 located op p_hsExpr
469 located op p_hsExpr
637− useRecordDot' <- useRecordDot
638− let isRecordDot' = isRecordDot (unLoc op) (getLoc x)
639− unless (useRecordDot' && isRecordDot') breakpoint
470+ breakpoint
640 inci (located x p_hsExpr)
471 inci (located x p_hsExpr)
641− ExplicitTuple NoExtField args boxity ->
472+ ExplicitTuple NoExt args boxity -> do
642 let isSection = any (isMissing . unLoc) args
473 let isSection = any (isMissing . unLoc) args
643 isMissing = \case
474 isMissing = \case
644− Missing NoExtField -> True
475+ Missing NoExt -> True
645 _ -> False
476 _ -> False
647− Present NoExtField x -> located x p_hsExpr
648− Missing NoExtField -> pure ()
649− XTupArg x -> noExtCon x
650− p_larg = sitcc . located' p_arg
651− parens' =
477+ let parens' =
652 case boxity of
478 case boxity of
653 Boxed -> parens
479 Boxed -> parens
654 Unboxed -> parensHash
480 Unboxed -> parensHash
655− in if isSection
481+ parens' $ if isSection
656− then
482+ then sequence_ (withSep (txt ",") (located' p_hsTupArg) args)
657− switchLayout [] . parens' s $
483+ else velt (withSep comma (located' p_hsTupArg) args)
658− sep comma p_larg args
660− switchLayout (getLoc <$> args) . parens' s $
661− sep commaDel p_larg args
662− ExplicitSum NoExtField tag arity e ->
484+ ExplicitSum NoExt tag arity e -> do
485+ let before = tag - 1
486+ after = arity - before - 1
487+ args = replicate before Nothing <> [Just e] <> replicate after Nothing
489+ let isFirst = i == 0
490+ isLast = i == arity - 1
493+ unless (isFirst || isLast) space
495+ unless isFirst space
663− p_unboxedSum N tag arity (located e p_hsExpr)
496+ located l p_hsExpr
498+ parensHash $ sequence_ (withSep (txt "|") f (zip args [0..]))
664− HsCase NoExtField e mgroup ->
499+ HsCase NoExt e mgroup -> do
665− p_case exprPlacement p_hsExpr e mgroup
500+ txt "case "
666− HsIf NoExtField _ if' then' else' ->
501+ located e p_hsExpr
667− p_if exprPlacement p_hsExpr if' then' else'
668− HsMultiIf NoExtField guards -> do
669− txt "if"
502+ txt " of"
670 breakpoint
503 breakpoint
504+ inci (p_matchGroup Case mgroup)
505+ HsIf NoExt _ if' then' else' -> do
507+ located if' p_hsExpr
510+ located then' $ \x -> do
515+ located else' $ \x -> do
518+ HsMultiIf NoExt guards -> do
671− inci . inci $ sep newline (located' (p_grhs RightArrow)) guards
520+ sitcc $ newlineSep (located' (p_grhs RightArrow)) guards
672− HsLet NoExtField localBinds e ->
521+ HsLet NoExt localBinds e -> do
673− p_let p_hsExpr localBinds e
522+ txt "let "
523+ sitcc (located localBinds p_hsLocalBinds)
524+ vlayout space (newline >> space)
526+ sitcc (located e p_hsExpr)
674− HsDo NoExtField ctx es -> do
527+ HsDo NoExt ctx es -> do
675 let doBody header = do
528 let doBody header = do
676 txt header
529 txt header
677− breakpoint
530+ newline
678− ub <- layoutToBraces <$> getLayout
531+ inci $ located es (newlineSep (located' (sitcc . p_stmt)))
681− (ub . withSpacing (p_stmt' exprPlacement (p_hsExpr' S)))
683− compBody = brackets N . located es $ \xs -> do
532+ compBody = brackets $ located es $ \xs -> do
684 let p_parBody =
533 let p_parBody =
686− (breakpoint >> txt "|" >> space)
535+ intersperse breakpoint .
687− p_seqBody
536+ withSep (txt "| ") p_seqBody
688 p_seqBody =
537 p_seqBody =
689− sitcc
538+ sequence_ .
690− . sep
539+ intersperse (vlayout (pure ()) newline) .
692− (located' (sitcc . p_stmt))
540+ withSep comma (located' (sitcc . p_stmt))
693 stmts = init xs
541 stmts = init xs
694 yield = last xs
542 yield = last xs
695 lists = foldr (liftAppend . gatherStmt) [] stmts
543 lists = foldr (liftAppend . gatherStmt) [] stmts
696 located yield p_stmt
544 located yield p_stmt
697 breakpoint
545 breakpoint
698− txt "|"
546+ txt "| "
700 p_parBody lists
547 p_parBody lists
701 case ctx of
548 case ctx of
702 DoExpr -> doBody "do"
549 DoExpr -> doBody "do"
703 MDoExpr -> doBody "mdo"
550 MDoExpr -> doBody "mdo"
704 ListComp -> compBody
551 ListComp -> compBody
705 MonadComp -> notImplemented "MonadComp"
552 MonadComp -> notImplemented "MonadComp"
706− ArrowExpr -> notImplemented "ArrowExpr"
553+ ArrowExpr -> notImplemented "ArrowExpr"
707 GhciStmtCtxt -> notImplemented "GhciStmtCtxt"
554 GhciStmtCtxt -> notImplemented "GhciStmtCtxt"
708 PatGuard _ -> notImplemented "PatGuard"
555 PatGuard _ -> notImplemented "PatGuard"
709 ParStmtCtxt _ -> notImplemented "ParStmtCtxt"
556 ParStmtCtxt _ -> notImplemented "ParStmtCtxt"
710 TransStmtCtxt _ -> notImplemented "TransStmtCtxt"
557 TransStmtCtxt _ -> notImplemented "TransStmtCtxt"
711 ExplicitList _ _ xs ->
558 ExplicitList _ _ xs ->
713− sep commaDel (sitcc . located' p_hsExpr) xs
559+ brackets $ velt (withSep comma (located' p_hsExpr) xs)
714 RecordCon {..} -> do
560 RecordCon {..} -> do
715 located rcon_con_name atom
561 located rcon_con_name atom
716 breakpoint
562 breakpoint
717 let HsRecFields {..} = rcon_flds
563 let HsRecFields {..} = rcon_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) <$> rec_flds
564+ fields = located' p_hsRecField <$> rec_flds
726 case rec_dotdot of
566 case rec_dotdot of
727 Just {} -> [txt ".."]
567 Just {} -> [txt ".."]
728 Nothing -> []
568 Nothing -> []
729− inci . braces N $
569+ inci $ braces $ velt (withSep comma id (fields <> dotdot))
730− sep commaDel sitcc (fields <> dotdot)
731 RecordUpd {..} -> do
570 RecordUpd {..} -> do
732 located rupd_expr p_hsExpr
571 located rupd_expr p_hsExpr
733− useRecordDot' <- useRecordDot
734− let mrs sp = case getLoc sp of
735− RealSrcSpan r -> Just r
738− ((1 +) . srcSpanEndCol <$> mrs rupd_expr)
739− == (srcSpanStartCol <$> mrs (head rupd_flds))
740− unless (useRecordDot' && isPluginForm) breakpoint
572+ 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))
573+ inci $ braces $ velt (withSep comma (located' p_hsRecField) rupd_flds)
753− ExprWithTySig NoExtField x HsWC {hswc_body = HsIB {..}} -> sitcc $ do
574+ ExprWithTySig affix x -> sitcc $ do
754 located x p_hsExpr
575 located x p_hsExpr
757 breakpoint
576 breakpoint
579+ let HsWC {..} = affix
580+ HsIB {..} = hswc_body
758− inci $ located hsib_body p_hsType
581+ located hsib_body p_hsType
759− ExprWithTySig NoExtField _ HsWC {hswc_body = XHsImplicitBndrs x} -> noExtCon x
760− ExprWithTySig NoExtField _ (XHsWildCardBndrs x) -> noExtCon x
761− ArithSeq NoExtField _ x ->
582+ ArithSeq NoExt _ x -> do
762 case x of
583 case x of
763− From from -> brackets s $ do
584+ From from -> brackets $ do
764 located from p_hsExpr
585 located from p_hsExpr
765 breakpoint
586 breakpoint
767− FromThen from next -> brackets s $ do
588+ FromThen from next -> brackets $ do
768− sep commaDel (located' p_hsExpr) [from, next]
589+ velt (withSep comma (located' p_hsExpr) [from, next])
769 breakpoint
590 breakpoint
771− FromTo from to -> brackets s $ do
592+ FromTo from to -> brackets $ do
772 located from p_hsExpr
593 located from p_hsExpr
773 breakpoint
594 breakpoint
774− txt ".."
595+ txt ".. "
776 located to p_hsExpr
596 located to p_hsExpr
777− FromThenTo from next to -> brackets s $ do
597+ FromThenTo from next to -> brackets $ do
778− sep commaDel (located' p_hsExpr) [from, next]
598+ velt (withSep comma (located' p_hsExpr) [from, next])
779 breakpoint
599 breakpoint
780− txt ".."
600+ txt ".. "
782 located to p_hsExpr
601 located to p_hsExpr
783− HsSCC NoExtField _ name x -> do
602+ HsSCC NoExt _ name x -> do
784 txt "{-# SCC "
603 txt "{-# SCC "
785 atom name
604 atom name
786 txt " #-}"
605 txt " #-}"
787 breakpoint
606 breakpoint
788 located x p_hsExpr
607 located x p_hsExpr
789− HsCoreAnn NoExtField _ value x -> do
608+ HsCoreAnn NoExt _ value x -> do
790 txt "{-# CORE "
609 txt "{-# CORE "
791 atom value
610 atom value
792 txt " #-}"
611 txt " #-}"
793 breakpoint
612 breakpoint
794 located x p_hsExpr
613 located x p_hsExpr
795− HsBracket NoExtField x -> p_hsBracket x
614+ HsBracket NoExt x -> p_hsBracket x
796 HsRnBracketOut {} -> notImplemented "HsRnBracketOut"
615 HsRnBracketOut {} -> notImplemented "HsRnBracketOut"
797 HsTcBracketOut {} -> notImplemented "HsTcBracketOut"
616 HsTcBracketOut {} -> notImplemented "HsTcBracketOut"
798− HsSpliceE NoExtField splice -> p_hsSplice splice
617+ HsSpliceE NoExt splice -> p_hsSplice splice
799− HsProc NoExtField p e -> do
618+ HsProc NoExt p e -> do
800 txt "proc"
619 txt "proc"
801− located p $ \x -> do
620+ located p $ \x -> do
802 breakpoint
621 breakpoint
803 inci (p_pat x)
622 inci (p_pat x)
804 breakpoint
623 breakpoint
806− placeHanging (cmdTopPlacement (unLoc e)) $
625+ placeHanging (cmdTopPlacement (unLoc e)) (located e p_hsCmdTop)
807− located e p_hsCmdTop
808− HsStatic _ e -> do
626+ HsStatic _ e -> do
809 txt "static"
627 txt "static"
810 breakpoint
628 breakpoint
811 inci (located e p_hsExpr)
629 inci (located e p_hsExpr)
630+ HsArrApp NoExt body input arrType cond ->
631+ p_hsCmd (HsCmdArrApp NoExt body input arrType cond)
632+ HsArrForm NoExt form mfixity cmds ->
633+ p_hsCmd (HsCmdArrForm NoExt form Prefix mfixity cmds)
812 HsTick {} -> notImplemented "HsTick"
634 HsTick {} -> notImplemented "HsTick"
813 HsBinTick {} -> notImplemented "HsBinTick"
635 HsBinTick {} -> notImplemented "HsBinTick"
814 HsTickPragma {} -> notImplemented "HsTickPragma"
636 HsTickPragma {} -> notImplemented "HsTickPragma"
637+ EWildPat NoExt -> txt "_"
638+ EAsPat {} -> notImplemented "EAsPat"
639+ EViewPat {} -> notImplemented "EViewPat"
640+ ELazyPat {} -> notImplemented "ELazyPat"
815 HsWrap {} -> notImplemented "HsWrap"
641 HsWrap {} -> notImplemented "HsWrap"
816− XExpr x -> noExtCon x
642+ XExpr {} -> notImplemented "XExpr"
818p_patSynBind :: PatSynBind GhcPs GhcPs -> R ()
644p_patSynBind :: PatSynBind GhcPs GhcPs -> R ()
819p_patSynBind PSB {..} = do
645p_patSynBind PSB {..} = do
820− let rhs = do
646+ txt "pattern "
821− space
647+ let nonEmptySynDetails = \case
648+ PrefixCon (_:_) -> True
649+ RecCon (_:_) -> True
822− case psb_dir of
651+ case psb_dir of
823− Unidirectional -> do
652+ Unidirectional -> do
826− located psb_def p_pat
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
653 p_rdrName psb_id
844− inci $ do
654+ when (nonEmptySynDetails psb_args) space
845− switchLayout (getLoc <$> xs) $ do
655+ p_patSynDetails psb_args
846− unless (null xs) breakpoint
657+ breakpoint
658+ inci (located psb_def p_pat)
659+ ImplicitBidirectional -> do
847− sitcc (sep breakpoint p_rdrName xs)
660+ p_rdrName psb_id
848− rhs
661+ when (nonEmptySynDetails psb_args) space
849− RecCon xs -> do
662+ p_patSynDetails psb_args
665+ inci (located psb_def p_pat)
666+ ExplicitBidirectional mgroup -> do
851 p_rdrName psb_id
667 p_rdrName psb_id
668+ when (nonEmptySynDetails psb_args) space
669+ p_patSynDetails psb_args
672+ inci (located psb_def p_pat)
852 inci $ do
674 inci $ do
853− switchLayout (getLoc . recordPatSynPatVar <$> xs) $ do
675+ line (txt "where")
854− unless (null xs) breakpoint
676+ inci (p_matchGroup (Function psb_id) mgroup)
856− sep commaDel (p_rdrName . recordPatSynPatVar) xs
859− switchLayout [getLoc l, getLoc r] $ do
868−p_patSynBind (XPatSynBind x) = noExtCon x
677+p_patSynBind (XPatSynBind NoExt) = notImplemented "XPatSynBind"
870−p_case ::
679+p_patSynDetails :: HsPatSynDetails (Located RdrName) -> R ()
871− Data body =>
680+p_patSynDetails = \case
872− -- | Placer
681+ PrefixCon xs ->
873− (body -> Placement) ->
682+ velt' (p_rdrName <$> xs)
874− -- | Render
683+ RecCon xs ->
875− (body -> R ()) ->
684+ velt' (p_rdrName . recordPatSynPatVar <$> xs)
876− -- | Expression
685+ InfixCon _ _ -> notImplemented "InfixCon"
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 ()
687p_pat :: Pat GhcPs -> R ()
936p_pat = \case
688p_pat = \case
937− WildPat NoExtField -> txt "_"
689+ WildPat NoExt -> txt "_"
938− VarPat NoExtField name -> p_rdrName name
690+ VarPat NoExt name -> p_rdrName name
939− LazyPat NoExtField pat -> do
691+ LazyPat NoExt pat -> do
941 located pat p_pat
693 located pat p_pat
942− AsPat NoExtField name pat -> do
694+ AsPat NoExt name pat -> do
943 p_rdrName name
695 p_rdrName name
945 located pat p_pat
697 located pat p_pat
946− ParPat NoExtField pat ->
698+ ParPat NoExt pat ->
947− located pat (parens S . p_pat)
699+ located pat (parens . p_pat)
948− BangPat NoExtField pat -> do
700+ BangPat NoExt pat -> do
950 located pat p_pat
702 located pat p_pat
951− ListPat NoExtField pats ->
703+ ListPat NoExt pats -> do
952− brackets S $ sep commaDel (located' p_pat) pats
704+ brackets $ velt (withSep comma (located' p_pat) pats)
953− TuplePat NoExtField pats boxing -> do
705+ TuplePat NoExt pats boxing -> do
954− let parens' =
706+ let f =
955 case boxing of
707 case boxing of
956− Boxed -> parens S
708+ Boxed -> parens
957− Unboxed -> parensHash S
709+ Unboxed -> parensHash
958− parens' $ sep commaDel (sitcc . located' p_pat) pats
710+ f $ velt (withSep comma (located' p_pat) pats)
959− SumPat NoExtField pat tag arity ->
711+ SumPat NoExt pat _ _ -> do
712+ -- XXX I'm not sure about this one.
960− p_unboxedSum S tag arity (located pat p_pat)
713+ located pat p_pat
961 ConPatIn pat details ->
714 ConPatIn pat details ->
962 case details of
715 case details of
963 PrefixCon xs -> sitcc $ do
716 PrefixCon xs -> sitcc $ do
964 p_rdrName pat
717 p_rdrName pat
965 unless (null xs) $ do
718 unless (null xs) $ do
966 breakpoint
719 breakpoint
967− inci . sitcc $ sep breakpoint (sitcc . located' p_pat) xs
720+ inci $ velt' (located' p_pat <$> xs)
968 RecCon (HsRecFields fields dotdot) -> do
721 RecCon (HsRecFields fields dotdot) -> do
969 p_rdrName pat
722 p_rdrName pat
970 breakpoint
723 breakpoint
971 let f = \case
724 let f = \case
972 Nothing -> txt ".."
725 Nothing -> txt ".."
973 Just x -> located x p_pat_hsRecField
726 Just x -> located x p_pat_hsRecField
974− inci . braces N . sep commaDel f $
975− case dotdot of
727+ inci . braces . velt . withSep comma f $ case dotdot of
976− Nothing -> Just <$> fields
728+ Nothing -> Just <$> fields
977− Just (L _ n) -> (Just <$> take n fields) ++ [Nothing]
729+ Just n -> (Just <$> take n fields) ++ [Nothing]
978− InfixCon l r -> do
730+ InfixCon x y -> do
979− switchLayout [getLoc l, getLoc r] $ do
980− located l p_pat
731+ located x p_pat
981− breakpoint
732+ space
983− p_rdrName pat
733+ p_rdrName pat
984− space
734+ breakpoint
985− located r p_pat
735+ inci (located y p_pat)
986 ConPatOut {} -> notImplemented "ConPatOut" -- presumably created by renamer?
736 ConPatOut {} -> notImplemented "ConPatOut" -- presumably created by renamer?
987− ViewPat NoExtField expr pat -> sitcc $ do
737+ ViewPat NoExt expr pat -> sitcc $ do
988 located expr p_hsExpr
738 located expr p_hsExpr
990− txt "->"
739+ txt " ->"
991 breakpoint
740 breakpoint
992 inci (located pat p_pat)
741 inci (located pat p_pat)
993− SplicePat NoExtField splice -> p_hsSplice splice
742+ SplicePat NoExt splice -> p_hsSplice splice
994− LitPat NoExtField p -> atom p
743+ LitPat NoExt p -> atom p
995− NPat NoExtField v _ _ -> located v (atom . ol_val)
744+ NPat NoExt v _ _ -> located v (atom . ol_val)
996− NPlusKPat NoExtField n k _ _ _ -> sitcc $ do
745+ NPlusKPat NoExt n k _ _ _ -> sitcc $ do
997 p_rdrName n
746 p_rdrName n
998 breakpoint
747 breakpoint
999 inci $ do
748 inci $ do
1000− txt "+"
749+ txt "+ "
1002 located k (atom . ol_val)
750 located k (atom . ol_val)
1003− SigPat NoExtField pat hswc -> do
751+ SigPat hswc pat -> do
1004 located pat p_pat
752 located pat p_pat
1005 p_typeAscription hswc
753 p_typeAscription hswc
1006 CoPat {} -> notImplemented "CoPat" -- apparently created at some later stage
754 CoPat {} -> notImplemented "CoPat" -- apparently created at some later stage
1007− XPat x -> noExtCon x
755+ XPat NoExt -> notImplemented "XPat"
1009p_pat_hsRecField :: HsRecField' (FieldOcc GhcPs) (LPat GhcPs) -> R ()
757p_pat_hsRecField :: HsRecField' (FieldOcc GhcPs) (LPat GhcPs) -> R ()
1010p_pat_hsRecField HsRecField {..} = do
758p_pat_hsRecField HsRecField {..} = do
1011 located hsRecFieldLbl $ \x ->
759 located hsRecFieldLbl $ \x ->
1012 p_rdrName (rdrNameFieldOcc x)
760 p_rdrName (rdrNameFieldOcc x)
1013 unless hsRecPun $ do
761 unless hsRecPun $ do
1016 breakpoint
763 breakpoint
1017 inci (located hsRecFieldArg p_pat)
764 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 ()
766p_hsSplice :: HsSplice GhcPs -> R ()
1035p_hsSplice = \case
767p_hsSplice = \case
1036− HsTypedSplice NoExtField deco _ expr -> p_hsSpliceTH True expr deco
768+ HsTypedSplice NoExt deco _ expr -> p_hsSpliceTH True expr deco
1037− HsUntypedSplice NoExtField deco _ expr -> p_hsSpliceTH False expr deco
769+ HsUntypedSplice NoExt deco _ expr -> p_hsSpliceTH False expr deco
1038− HsQuasiQuote NoExtField _ quoterName srcSpan str -> do
770+ HsQuasiQuote NoExt _ quoterName srcSpan str -> do
1040 p_rdrName (L srcSpan quoterName)
772 p_rdrName (L srcSpan quoterName)
1042− -- QuasiQuoters often rely on precise custom strings. We cannot do any
774+ -- NOTE QuasiQuoters often rely on precise custom strings. We cannot do
1043− -- formatting here without potentially breaking someone's code.
775+ -- any formatting here without potentially breaking someone's code.
1044 atom str
776 atom str
1045 txt "|]"
777 txt "|]"
1046 HsSpliced {} -> notImplemented "HsSpliced"
778 HsSpliced {} -> notImplemented "HsSpliced"
1047− HsSplicedT {} -> notImplemented "HsSplicedT"
779+ XSplice {} -> notImplemented "XSplice"
1048− XSplice x -> noExtCon x
1050−p_hsSpliceTH ::
781+p_hsSpliceTH
1051− -- | Typed splice?
782+ :: Bool -- ^ Typed splice?
1052− Bool ->
783+ -> LHsExpr GhcPs -- ^ Splice expression
1053− -- | Splice expression
784+ -> SpliceDecoration -- ^ Splice decoration
1054− LHsExpr GhcPs ->
785+ -> R ()
1055− -- | Splice decoration
1056− SpliceDecoration ->
1058p_hsSpliceTH isTyped expr = \case
786p_hsSpliceTH isTyped expr = \case
1059 HasParens -> do
787 HasParens -> do
1060 txt decoSymbol
788 txt decoSymbol
1061− parens N (located expr (sitcc . p_hsExpr))
789+ parens (located expr (sitcc . p_hsExpr))
1062 HasDollar -> do
790 HasDollar -> do
1063 txt decoSymbol
791 txt decoSymbol
1064 located expr (sitcc . p_hsExpr)
792 located expr (sitcc . p_hsExpr)
1065− NoParens ->
793+ NoParens -> do
1066 located expr (sitcc . p_hsExpr)
794 located expr (sitcc . p_hsExpr)
1068 decoSymbol = if isTyped then "$$" else "$"
796 decoSymbol = if isTyped then "$$" else "$"
1070p_hsBracket :: HsBracket GhcPs -> R ()
798p_hsBracket :: HsBracket GhcPs -> R ()
1071p_hsBracket = \case
799p_hsBracket = \case
1072− ExpBr NoExtField expr -> do
800+ ExpBr NoExt expr -> quote "e" (located expr p_hsExpr)
1073− anns <- getEnclosingAnns
801+ PatBr NoExt pat -> quote "p" (located pat p_pat)
1074− let name = case anns of
802+ DecBrL NoExt decls -> quote "d" (p_hsDecls Free decls)
1075− AnnOpenEQ : _ -> ""
803+ DecBrG NoExt _ -> notImplemented "DecBrG" -- result of renamer
1076− _ -> "e"
804+ TypBr NoExt ty -> quote "t" (located ty p_hsType)
1077− quote name (located expr p_hsExpr)
805+ 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)
806 txt (bool "''" "'" isSingleQuote)
1084 -- HACK As you can see we use 'noLoc' here to be able to pass name into
807 -- HACK As you can see we use 'noLoc' here to be able to pass name into
1085 -- 'p_rdrName' since the latter expects a "located" thing. The problem
808 -- 'p_rdrName' since the latter expects a "located" thing. The problem
@@ -1087,20 +810,16 @@ p_hsBracket = \case
1087 -- turn makes it impossible to detect if there are parentheses around
810 -- turn makes it impossible to detect if there are parentheses around
1088 -- it, etc. So we have to add parentheses manually assuming they are
811 -- it, etc. So we have to add parentheses manually assuming they are
1089 -- necessary for all operators.
812 -- necessary for all operators.
1090− let isOperator =
813+ let isOperator = any isPunctuation (showOutputable name)
1091− all
814+ wrapper = if isOperator then parens else id
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)
815 wrapper $ p_rdrName (noLoc name)
1097− TExpBr NoExtField expr -> do
816+ TExpBr NoExt expr -> do
1098 txt "[||"
817 txt "[||"
1099 breakpoint'
818 breakpoint'
1100 located expr p_hsExpr
819 located expr p_hsExpr
1101 breakpoint'
820 breakpoint'
1102 txt "||]"
821 txt "||]"
1103− XBracket x -> noExtCon x
822+ XBracket {} -> notImplemented "XBracket"
1105 quote :: Text -> R () -> R ()
824 quote :: Text -> R () -> R ()
1106 quote name body = do
825 quote name body = do
@@ -1108,70 +827,16 @@ p_hsBracket = \case
1108 txt name
827 txt name
1110 breakpoint'
829 breakpoint'
1112− dontUseBraces body
831+ breakpoint'
1113− breakpoint'
832+ 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----------------------------------------------------------------------------
834----------------------------------------------------------------------------
1164-- Helpers
835-- 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
837-- | 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.
838-- than the other, return the rest of the longer list unchanged.
1175liftAppend :: Semigroup a => [a] -> [a] -> [a]
840liftAppend :: Semigroup a => [a] -> [a] -> [a]
1176liftAppend [] [] = []
841liftAppend [] [] = []
1177liftAppend [] (y : ys) = y : ys
842liftAppend [] (y : ys) = y : ys
@@ -1179,15 +844,15 @@ liftAppend (x : xs) [] = x : xs
1179liftAppend (x : xs) (y : ys) = x <> y : liftAppend xs ys
844liftAppend (x : xs) (y : ys) = x <> y : liftAppend xs ys
1181getGRHSSpan :: GRHS GhcPs (Located body) -> SrcSpan
846getGRHSSpan :: GRHS GhcPs (Located body) -> SrcSpan
1182−getGRHSSpan (GRHS NoExtField guards body) =
847+getGRHSSpan (GRHS NoExt _ body) = getLoc body
1183− combineSrcSpans' $ getLoc body :| map getLoc guards
848+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
850-- | 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
851-- to separate it from preceding expressions and whether to bump indentation
1188-- depending on what sort of expression we have.
852-- depending on what sort of expression we have.
1189placeHanging :: Placement -> R () -> R ()
854placeHanging :: Placement -> R () -> R ()
1190−placeHanging placement m =
855+placeHanging placement m = do
1191 case placement of
856 case placement of
1192 Hanging -> do
857 Hanging -> do
@@ -1198,165 +863,49 @@ placeHanging placement m =
1199-- | Check if given block contains single expression which has a hanging
864-- | Check if given block contains single expression which has a hanging
1201−blockPlacement ::
866+
1202− (body -> Placement) ->
867+blockPlacement
1203− [LGRHS GhcPs (Located body)] ->
868+ :: (body -> Placement)
1204− Placement
869+ -> [LGRHS GhcPs (Located body)]
1205−blockPlacement placer [L _ (GRHS NoExtField _ (L _ x))] = placer x
870+ -> Placement
871+blockPlacement placer [(L _ (GRHS NoExt _ (L _ x)))] = placer x
1206blockPlacement _ _ = Normal
872blockPlacement _ _ = Normal
1208-- | Check if given command has a hanging form.
874-- | Check if given command has a hanging form.
1209cmdPlacement :: HsCmd GhcPs -> Placement
876cmdPlacement :: HsCmd GhcPs -> Placement
1210cmdPlacement = \case
877cmdPlacement = \case
1211− HsCmdLam NoExtField _ -> Hanging
878+ HsCmdLam NoExt _ -> Hanging
1212− HsCmdCase NoExtField _ _ -> Hanging
879+ HsCmdCase NoExt _ _ -> Hanging
1213− HsCmdDo NoExtField _ -> Hanging
880+ HsCmdDo NoExt _ -> Hanging
1214 _ -> Normal
881 _ -> Normal
1216cmdTopPlacement :: HsCmdTop GhcPs -> Placement
883cmdTopPlacement :: HsCmdTop GhcPs -> Placement
1217cmdTopPlacement = \case
884cmdTopPlacement = \case
1218− HsCmdTop NoExtField (L _ x) -> cmdPlacement x
885+ HsCmdTop NoExt (L _ x) -> cmdPlacement x
1219− XCmdTop x -> noExtCon x
886+ XCmdTop {} -> notImplemented "XCmdTop"
1221-- | Check if given expression has a hanging form.
888-- | Check if given expression has a hanging form.
1222exprPlacement :: HsExpr GhcPs -> Placement
890exprPlacement :: HsExpr GhcPs -> Placement
1223exprPlacement = \case
891exprPlacement = \case
1224− -- Only hang lambdas with single line parameter lists
892+ HsLam NoExt _ -> Hanging
1225− HsLam NoExtField mg -> case mg of
893+ HsLamCase NoExt _ -> Hanging
1226− MG _ (L _ [L _ (Match NoExtField _ (x : xs) _)]) _
894+ HsCase NoExt _ _ -> Hanging
1227− | isOneLineSpan (combineSrcSpans' $ fmap getLoc (x :| xs)) ->
895+ HsDo NoExt DoExpr _ -> Hanging
1228− Hanging
896+ HsDo NoExt MDoExpr _ -> Hanging
1229− _ -> Normal
897+ RecordCon NoExt _ _ -> Hanging
1230− HsLamCase NoExtField _ -> Hanging
898+ HsProc NoExt (L s _) _ ->
1231− HsCase NoExtField _ _ -> Hanging
899+ -- Indentation breaks if pattern is longer than one line and left hanging.
1232− HsDo NoExtField DoExpr _ -> Hanging
900+ -- Consequentally, once apply hanging when it is safe.
1233− HsDo NoExtField MDoExpr _ -> Hanging
901+ if isOneLineSpan s
1234− OpApp NoExtField _ op y ->
902+ then Hanging
1235− case (fmap getOpNameStr . getOpName . unLoc) op of
903+ 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
904 _ -> Normal
1247withGuards :: [LGRHS GhcPs (Located body)] -> Bool
906withGuards :: [LGRHS GhcPs (Located body)] -> Bool
1248withGuards = any (checkOne . unLoc)
907withGuards = any (checkOne . unLoc)
1250 checkOne :: GRHS GhcPs (Located body) -> Bool
909 checkOne :: GRHS GhcPs (Located body) -> Bool
1251− checkOne (GRHS NoExtField [] _) = False
910+ checkOne (GRHS NoExt [] _) = False
1252 checkOne _ = True
911 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')