Toml.Type.Value

Type of value

data TValue

Needed for GADT parameterization

Constructors

TBool

TInteger

TDouble

TText

TDate

TArray

Instances

Eq TValue

Defined in Toml.Type.Value

Methods

(==) :: TValue -> TValue -> Bool

(/=) :: TValue -> TValue -> Bool

Show TValue

Defined in Toml.Type.Value

Methods

showsPrec :: Int -> TValue -> ShowS

show :: TValue -> String

showList :: [TValue] -> ShowS

showType :: TValue -> String

Value

data Value (t :: TValue) where

Value in key = value pair.

Constructors

Bool :: Bool -> Value TBool

Boolean value:

bool1 = true
bool2 = false

Integer :: Integer -> Value TInteger

Integer value:

int1 = +99
int2 = 42
int3 = 0
int4 = -17
int5 = 5_349_221
hex1 = 0xDEADBEEF
oct2 = 0o755 # useful for Unix file permissions
bin1 = 0b11010110

Double :: Double -> Value TDouble

Floating point number:

flt1 = -3.1415   # fractional
flt2 = 1e6       # exponent
flt3 = 6.626e-34 # both
flt4 = 9_224_617.445_991_228_313

Text :: Text -> Value TText

String value:

key = "value"
bare_key = "value"
bare-key = "value"

Date :: DateTime -> Value TDate

Date-time. See documentation for DateTime type.

Array :: [Value t] -> Value TArray

Array of values. According to TOML specification all values in array should have the same type. This is guaranteed statically with this type.

arr1 = [ 1, 2, 3 ]
arr2 = [ "red", "yellow", "green" ]
arr3 = [ [ 1, 2 ], [3, 4, 5] ]
arr4 = [ "all", strings, """are the same""", ''type'']
arr5 = [ [ 1, 2 ], ["a", "b", "c"] ]

arr6 = [ 1, 2.0 ] # INVALID

Instances

Eq (Value t)

Defined in Toml.Type.Value

Methods

(==) :: Value t -> Value t -> Bool

(/=) :: Value t -> Value t -> Bool

t ~ TInteger => Num (Value t)

Defined in Toml.Type.Value

Methods

(+) :: Value t -> Value t -> Value t

(-) :: Value t -> Value t -> Value t

(*) :: Value t -> Value t -> Value t

negate :: Value t -> Value t

abs :: Value t -> Value t

signum :: Value t -> Value t

fromInteger :: Integer -> Value t

Show (Value t)

Defined in Toml.Type.Value

Methods

showsPrec :: Int -> Value t -> ShowS

show :: Value t -> String

showList :: [Value t] -> ShowS

t ~ TText => IsString (Value t)

Defined in Toml.Type.Value

Methods

fromString :: String -> Value t

data DateTime

Constructors

Zoned !ZonedTime

Offset date-time:

odt1 = 1979-05-27T07:32:00Z
odt2 = 1979-05-27T00:32:00-07:00

Local !LocalTime

Local date-time (without offset):

ldt1 = 1979-05-27T07:32:00
ldt2 = 1979-05-27T00:32:00.999999

Day !Day

Local date (only day):

ld1 = 1979-05-27

Hours !TimeOfDay

Local time (time of the day):

lt1 = 07:32:00
lt2 = 00:32:00.999999

Instances

Eq DateTime

Defined in Toml.Type.Value

Methods

(==) :: DateTime -> DateTime -> Bool

(/=) :: DateTime -> DateTime -> Bool

Show DateTime

Defined in Toml.Type.Value

Methods

showsPrec :: Int -> DateTime -> ShowS

show :: DateTime -> String

showList :: [DateTime] -> ShowS

eqValueList :: [Value a] -> [Value b] -> Bool

valueType :: Value t -> TValue

Reifies type of Value into ValueType. Unfortunately, there's no way to guarante that valueType will return t for object with type Value 't.

Type checking

data TypeMismatchError

Data type that holds expected vs. actual type.

Constructors

TypeMismatchError

Fields

• typeExpected :: TValue
• typeActual :: TValue

Instances

Eq TypeMismatchError

Defined in Toml.Type.Value

Methods

(==) :: TypeMismatchError -> TypeMismatchError -> Bool

(/=) :: TypeMismatchError -> TypeMismatchError -> Bool

Show TypeMismatchError

Defined in Toml.Type.Value

Methods

showsPrec :: Int -> TypeMismatchError -> ShowS

show :: TypeMismatchError -> String

showList :: [TypeMismatchError] -> ShowS

sameValue :: Value a -> Value b -> Either TypeMismatchError (a :~: b)