Data.Cassava.Internal.RecordBuilder

This module provides an easy way to explore input files that may have numerous columns by helping create a Record types by guessing the types. That information can be used as is or persisted to a file so that other customizations can be performed.

Documentation

makeField :: ByteString -> Type -> String -> (Name, Bang, Type)

Create a field name and type tuple that will be used with RecC to create a Record.

makeFields :: Vector (ByteString, Type) -> String -> Vector (Name, Bang, Type)

makeRecord :: String -> Vector (Name, Bang, Type) -> DecsQ

createRecords :: ByteString -> DecodeOptions -> (Header, Vector NamedRecord)

inferColumnType :: ByteString -> Vector ByteString -> (ByteString, Type)

isInteger :: String -> Bool

isDouble :: String -> Bool

isNumeric :: String -> Bool

isBool :: String -> Bool

data Empty

Constructors

Empty

maybeType :: Name -> Type

inferMajorityType :: Vector ByteString -> Type

collectColumns :: ByteString -> Vector NamedRecord -> Vector ByteString

inferTypes :: Header -> Vector NamedRecord -> String -> Vector (Name, Bang, Type)

Orphan instances

FromField Bool

Instances to support creation of Bool type fields. Cassava currently does not provide an instance for Bool.

Methods

parseField :: Field -> Parser Bool

ToField Bool

Instances to support conversion to Bool type. Cassava currently does not provide an instance for Bool.

Methods

toField :: Bool -> Field