| Safe Haskell | None |
|---|---|
| Language | Haskell98 |
Fay.Convert
Description
Convert a Haskell value to a (JSON representation of a) Fay value.
- showToFay :: Data a => a -> Maybe Value
- readFromFay :: Data a => Value -> Maybe a
- readFromFay' :: Data a => Value -> Either String a
- encodeFay :: (GenericQ Value -> GenericQ Value) -> GenericQ Value
- decodeFay :: Data b => (forall a. Data a => Value -> Either String a -> Either String a) -> Value -> Either String b
Documentation
showToFay :: Data a => a -> Maybe Value Source #
Convert a Haskell value to a Fay json value. This can fail when primitive
values aren't handled by explicit cases. encodeFay can be used to
resolve this issue.
readFromFay' :: Data a => Value -> Either String a Source #
Convert a Fay json value to a Haskell value. This is like readFromFay, except it yields helpful error messages on failure.
encodeFay :: (GenericQ Value -> GenericQ Value) -> GenericQ Value Source #
Convert a Haskell value to a Fay json value. This can fail when primitive values aren't handled by explicit cases. When this happens, you can add additional cases via the first parameter.
The first parameter is a function that can be used to override the
conversion. This usually looks like using extQ to additional type-
specific cases.
decodeFay :: Data b => (forall a. Data a => Value -> Either String a -> Either String a) -> Value -> Either String b Source #
Convert a Fay json value to a Haskell value.
The first parameter is a function that can be used to override the
conversion. This usually looks like using extR to additional type-
specific cases.