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Template.hs:5:1: warning: [-Wsemigroup (in -Wcompat)]
Local definition of ‘<>’ clashes with a future Prelude name.
This will become an error in a future release.
Template.hs:11:3: warning: [GHC-50928] [-Wnoncanonical-monoid-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘(<>) = mappend’ definition detected
in the instance declaration for ‘Semigroup S’.
Suggested fix:
Move definition from ‘mappend’ to ‘(<>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid
Template.hs:14:3: warning: [GHC-50928] [-Wnoncanonical-monoid-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘mappend’ definition detected
in the instance declaration for ‘Monoid S’.
‘mappend’ will eventually be removed in favour of ‘(<>)’
Suggested fix:
Either remove definition for ‘mappend’ (recommended) or define as ‘mappend = (<>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid
Template.hs:24:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘pure = return’ definition detected
in the instance declaration for ‘Applicative M’.
Suggested fix:
Move definition from ‘return’ to ‘pure’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
Template.hs:25:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘(*>) = (>>)’ definition detected
in the instance declaration for ‘Applicative M’.
Suggested fix:
Move definition from ‘(>>)’ to ‘(*>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
Template.hs:28:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘return’ definition detected
in the instance declaration for ‘Monad M’.
‘return’ will eventually be removed in favour of ‘pure’
Suggested fix:
Either remove definition for ‘return’ (recommended) or define as ‘return = pure’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
Template.hs:30:3: warning: [GHC-22705] [-Wnoncanonical-monad-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘(>>)’ definition detected
in the instance declaration for ‘Monad M’.
‘(>>)’ will eventually be removed in favour of ‘(*>)’
Suggested fix:
Either remove definition for ‘(>>)’ (recommended) or define as ‘(>>) = (*>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/monad-of-no-return
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