Moduletoml-parser-2.0.0.0Haskell2010

Toml.Schema.Generic

This module makes it possible to easily derive the TOML classes using the DerivingVia extension.

For example:

data Physical = Physical {
    color :: String,
    shape :: String
    }
    deriving (Eq, Show, Generic)
    deriving (ToTable, ToValue, FromValue) via GenericTomlTable Physical

These derived instances would allow you to match TOML {color="red", shape="round"} to value Physical "red" "round".

data Coord = Coord Int Int
    deriving (Eq, Show, Generic)
    deriving (ToValue, FromValue) via GenericTomlArray Physical

These derived instances would allow you to match TOML [1,2] to value Coord 1 2.

2 types
4 classes
4 values

Packagetoml-parser-2.0.0.0
Exports10
LanguageHaskell2010
LicenceISC
SourceGeneric.hs

DerivingVia

2 declarations

newtypenewtype GenericTomlTable a

Helper type to use GHC's DerivingVia extension to derive ToValue, ToTable, FromValue for records.

Constructors

GenericTomlTable a

Instances3FromValue, ToTable, ToValue

(Generic a, GParseTable (Rep a)) => FromValue (GenericTomlTable a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic
Instance derived using genericParseTable
(Generic a, GToTable (Rep a)) => ToTable (GenericTomlTable a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic
Instance derived using genericToTable
(Generic a, GToTable (Rep a)) => ToValue (GenericTomlTable a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic
Instance derived from ToTable instance using defaultTableToValue

newtypenewtype GenericTomlArray a

Helper type to use GHC's DerivingVia extension to derive ToValue, ToTable, FromValue for any product type.

Constructors

GenericTomlArray a

Instances2FromValue, ToValue

(Generic a, GFromArray (Rep a)) => FromValue (GenericTomlArray a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic
Instance derived using genericFromArray
(Generic a, GToArray (Rep a)) => ToValue (GenericTomlArray a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic
Instance derived using genericToArray

FromValue

4 declarations

valuegenericFromArray

:: (Generic a, GFromArray (Rep a))
=> Value' l
-> Matcher l a

Match a Value' as an array positionally matching field fields of a constructor to the elements of the array.

valuegenericFromTable

:: (Generic a, GParseTable (Rep a))
=> Value' l
-> Matcher l a

Implementation of fromValue using genericParseTable to derive a match from the record field names of the target type.

classclass GFromArray (f :: Type -> Type) where

Supports conversion of TOML arrays into product-type values.

Instances4GFromArray

GFromArray U1Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Uses no array elements
FromValue a => GFromArray (K1 i a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
(GFromArray f, GFromArray g) => GFromArray (f :*: g)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
GFromArray f => GFromArray (M1 i c f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue

classclass GParseTable (f :: Type -> Type) where

Supports conversion of TOML tables into record values using field selector names as TOML keys.

Instances6GParseTable

GParseTable U1Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Emits empty table
GParseTable f => GParseTable (C1 ('MetaCons sym fix 'True) f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Ignores value constructor name - only supports record constructors
GParseTable f => GParseTable (D1 c f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Ignores type constructor name
(Selector s, FromValue a) => GParseTable (S1 s (K1 i (Maybe a)))Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Omits the key from the table on nothing, includes it on just
(Selector s, FromValue a) => GParseTable (S1 s (K1 i a))Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Uses record selector name as table key
(GParseTable f, GParseTable g) => GParseTable (f :*: g)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.FromValue
Matches left then right component

ToValue

4 declarations

valuegenericToArray :: (Generic a, GToArray (Rep a)) => a -> Value

Use a record's field names to generate a Table

valuegenericToTable :: (Generic a, GToTable (Rep a)) => a -> Table

Use a record's field names to generate a Table

classclass GToArray (f :: Type -> Type) where

Convert product types to arrays positionally.

Instances3GToArray

ToValue a => GToArray (K1 i a)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Convert fields using ToValue instances
(GToArray f, GToArray g) => GToArray (f :*: g)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Convert left and then right
GToArray f => GToArray (M1 i c f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Ignore metadata

classclass GToTable (f :: Type -> Type) where

Supports conversion of product types with field selector names to TOML values.

Instances7GToTable, …

GToTable U1Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Emits empty table
GToTable V1Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
GToTable f => GToTable (C1 c f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Ignores value constructor names
GToTable f => GToTable (D1 c f)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Ignores type constructor names
(Selector s, ToValue a) => GToTable (S1 s (K1 i (Maybe a)))Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Omits the key from the table on nothing, includes it on just
(Selector s, ToValue a) => GToTable (S1 s (K1 i a))Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue
Uses record selector name as table key
(GToTable f, GToTable g) => GToTable (f :*: g)Defined in toml-parser-2.0.0.0 · Toml.Schema.Generic.ToValue