blob: 0f8971698dd917163e90c59d5d48ff0e8c5a9cfe (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE TemplateHaskell #-}
module T23203 where
import Language.Haskell.TH
data D = MkD Int
$(do let -- The original example from #23203
genPat1 :: Q [Dec]
genPat1 = sequence [
patSynD name (prefixPatSyn []) unidir wildP
, pure $ PragmaD $ InlineP name Inline FunLike AllPhases
]
where name = mkName "A"
-- A slightly more complicated example that also puts an INLINE pragma
-- on a field name in a record pattern synonym
genPat2 :: Q [Dec]
genPat2 = sequence [
patSynD con_name (recordPatSyn [fld_name]) implBidir (conP 'MkD [varP fld_name])
, pure $ PragmaD $ InlineP con_name Inline FunLike AllPhases
, pure $ PragmaD $ InlineP fld_name Inline FunLike AllPhases
]
where con_name = mkName "P"
fld_name = mkName "fld"
decs1 <- genPat1
decs2 <- genPat2
pure (decs1 ++ decs2))
|
