lpsmith/postgresql-simple — pull request #21 by sopvop (2012-07-23 07:16:20+00:00)
Title: Add a field' function which is like field but takes field parser as parameter.

adds
```haskell
field' :: (Field -> Maybe ByteString -> Ok a) -> RowParser a
```

Can be useful if parsers take runtime parameters, and can't be implemented with FromField typeclass.