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snoyberg / mono-traversable

Type classes for mapping, folding, and traversing monomorphic containers
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Remove Proxy from Yesod Classy Prelude? #187

Open MaxGabriel opened 4 years ago

MaxGabriel commented 4 years ago

Currently classy-prelude-yesod exports Proxy from https://hackage.haskell.org/package/http-conduit-2.3.7.3/docs/Network-HTTP-Client-Conduit.html#t:Proxy.

However, this conflicts in name with the fairly common Data.Proxy.Proxy. You also get a fairly confusing type error if you try to use the common (Proxy :: Proxy X) idiom with just the classy-prelude Proxy in scope:

src/Mercury/Purpose/Types.hs:74:69-77: error:
    • Expected kind ‘* -> *’, but ‘Proxy’ has kind ‘*’
    • In an expression type signature: Proxy Int
      In the first argument of ‘getTypeScriptDeclarations’, namely
        ‘(Proxy :: Proxy Int)’
      In the expression: getTypeScriptDeclarations (Proxy :: Proxy Int)
   |
74 |   getTypeScriptDeclarations _ = getTypeScriptDeclarations (Proxy :: Proxy Int) -- PurposeProxy.PurposeCodeData

Thoughts on removing that export from classy-prelude?

snoyberg commented 4 years ago

No objection

On Tue, Jan 28, 2020, 2:06 AM Maximilian Tagher notifications@github.com wrote:

Currently classy-prelude-yesod exports Proxy from https://hackage.haskell.org/package/http-conduit-2.3.7.3/docs/Network-HTTP-Client-Conduit.html#t:Proxy .

However, this conflicts in name with the fairly common Data.Proxy.Proxy. You also get a fairly confusing type error if you try to use the common (Proxy :: Proxy X) idiom with just the classy-prelude Proxy in scope:

src/Mercury/Purpose/Types.hs:74:69-77: error:

• Expected kind ‘* -> *’, but ‘Proxy’ has kind ‘*’

• In an expression type signature: Proxy Int

  In the first argument of ‘getTypeScriptDeclarations’, namely

    ‘(Proxy :: Proxy Int)’

  In the expression: getTypeScriptDeclarations (Proxy :: Proxy Int)

|

74 | getTypeScriptDeclarations _ = getTypeScriptDeclarations (Proxy :: Proxy Int) -- PurposeProxy.PurposeCodeData

Thoughts on removing that export from classy-prelude?

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