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New asTypeFromValue function #813

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New asTypeFromValue function #813

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3 changes: 3 additions & 0 deletions cardano-api/src/Cardano/Api.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,9 @@ module Cardano.Api
, module Cardano.Api.Key
, module Cardano.Api.Hash

-- * HasTypeProxy
, module Cardano.Api.HasTypeProxy

-- * Transaction building
, module Cardano.Api.Tx

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4 changes: 4 additions & 0 deletions cardano-api/src/Cardano/Api/HasTypeProxy.hs
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Expand Up @@ -9,6 +9,7 @@ module Cardano.Api.HasTypeProxy
, AsType (..)
, Proxy (..)
, FromSomeType (..)
, asTypeFromValue
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don't you have to export it from Cardano.Api as well?

)
where

Expand Down Expand Up @@ -39,6 +40,9 @@ instance HasTypeProxy BS.ByteString where
data AsType BS.ByteString = AsByteString
proxyToAsType _ = AsByteString

asTypeFromValue :: HasTypeProxy t => t -> AsType t
asTypeFromValue _ = proxyToAsType Proxy

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@carbolymer carbolymer Apr 15, 2025 •
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This would be useful too:

Suggested change
asType :: HasTypeProxy t => AsType t
asType = proxyToAsType Proxy

data FromSomeType (c :: Type -> Constraint) b where
FromSomeType :: c a => AsType a -> (a -> b) -> FromSomeType c b

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