Waargonaut.Types.JNumber

Representation of a JSON number and its various components.

Types

data JNumber

JSON Number type.

Constructors

JNumber

Fields

• _minus :: Bool
• _numberint :: JInt
• _frac :: Maybe Frac
• _expn :: Maybe Exp

Instances

Eq JNumber

Defined in Waargonaut.Types.JNumber

Methods

(==) :: JNumber -> JNumber -> Bool

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

Ord JNumber

Defined in Waargonaut.Types.JNumber

Methods

compare :: JNumber -> JNumber -> Ordering

(<) :: JNumber -> JNumber -> Bool

(<=) :: JNumber -> JNumber -> Bool

(>) :: JNumber -> JNumber -> Bool

(>=) :: JNumber -> JNumber -> Bool

max :: JNumber -> JNumber -> JNumber

min :: JNumber -> JNumber -> JNumber

Show JNumber

Defined in Waargonaut.Types.JNumber

Methods

showsPrec :: Int -> JNumber -> ShowS

show :: JNumber -> String

showList :: [JNumber] -> ShowS

HasJNumber JNumber

Defined in Waargonaut.Types.JNumber

Methods

jNumber :: Lens' JNumber JNumber

expn :: Lens' JNumber (Maybe Exp)

frac :: Lens' JNumber (Maybe Frac)

minus :: Lens' JNumber Bool

numberint :: Lens' JNumber JInt

class HasJNumber c where

Typeclass for things that may have a JNumber.

Minimal complete definition

jNumber

Methods

jNumber :: Lens' c JNumber

expn :: Lens' c (Maybe Exp)

frac :: Lens' c (Maybe Frac)

minus :: Lens' c Bool

numberint :: Lens' c JInt

Instances

HasJNumber JNumber

Defined in Waargonaut.Types.JNumber

Methods

jNumber :: Lens' JNumber JNumber

expn :: Lens' JNumber (Maybe Exp)

frac :: Lens' JNumber (Maybe Frac)

minus :: Lens' JNumber Bool

numberint :: Lens' JNumber JInt

data E

The textual exponent character may be upper or lower case, we maintain this fact using this type.

Constructors

EE

Ee

Instances

Eq E

Defined in Waargonaut.Types.JNumber

Methods

(==) :: E -> E -> Bool

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

Ord E

Defined in Waargonaut.Types.JNumber

Methods

compare :: E -> E -> Ordering

(<) :: E -> E -> Bool

(<=) :: E -> E -> Bool

(>) :: E -> E -> Bool

(>=) :: E -> E -> Bool

max :: E -> E -> E

min :: E -> E -> E

Show E

Defined in Waargonaut.Types.JNumber

Methods

showsPrec :: Int -> E -> ShowS

show :: E -> String

showList :: [E] -> ShowS

AsE E

Defined in Waargonaut.Types.JNumber

Methods

_E :: Prism' E E

_EE :: Prism' E ()

_Ee :: Prism' E ()

class AsE r where

Typeclass for things that may represent a upper or lower case exponent character.

Minimal complete definition

_E

Methods

_E :: Prism' r E

_EE :: Prism' r ()

_Ee :: Prism' r ()

Instances

AsE E

Defined in Waargonaut.Types.JNumber

Methods

_E :: Prism' E E

_EE :: Prism' E ()

_Ee :: Prism' E ()

newtype Frac

The fractional component of a JSON numeric value

Constructors

Frac (NonEmpty DecDigit)

Instances

Eq Frac

Defined in Waargonaut.Types.JNumber

Methods

(==) :: Frac -> Frac -> Bool

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

Ord Frac

Defined in Waargonaut.Types.JNumber

Methods

compare :: Frac -> Frac -> Ordering

(<) :: Frac -> Frac -> Bool

(<=) :: Frac -> Frac -> Bool

(>) :: Frac -> Frac -> Bool

(>=) :: Frac -> Frac -> Bool

max :: Frac -> Frac -> Frac

min :: Frac -> Frac -> Frac

Show Frac

Defined in Waargonaut.Types.JNumber

Methods

showsPrec :: Int -> Frac -> ShowS

show :: Frac -> String

showList :: [Frac] -> ShowS

Wrapped Frac

Defined in Waargonaut.Types.JNumber

Associated Types

type Unwrapped Frac

Methods

_Wrapped' :: Iso' Frac (Unwrapped Frac)

Frac ~ t => Rewrapped Frac t

Defined in Waargonaut.Types.JNumber

type Unwrapped Frac

Defined in Waargonaut.Types.JNumber

type Unwrapped Frac = NonEmpty DecDigit

data Exp

The exponent part of a JSON numeric value

Constructors

Exp

Fields

• _ex :: E
• _minusplus :: Maybe Bool
• _expdigits :: NonEmpty DecDigit

Instances

Eq Exp

Defined in Waargonaut.Types.JNumber

Methods

(==) :: Exp -> Exp -> Bool

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

Ord Exp

Defined in Waargonaut.Types.JNumber

Methods

compare :: Exp -> Exp -> Ordering

(<) :: Exp -> Exp -> Bool

(<=) :: Exp -> Exp -> Bool

(>) :: Exp -> Exp -> Bool

(>=) :: Exp -> Exp -> Bool

max :: Exp -> Exp -> Exp

min :: Exp -> Exp -> Exp

Show Exp

Defined in Waargonaut.Types.JNumber

Methods

showsPrec :: Int -> Exp -> ShowS

show :: Exp -> String

showList :: [Exp] -> ShowS

HasExp Exp

Defined in Waargonaut.Types.JNumber

Methods

exp :: Lens' Exp Exp

ex :: Lens' Exp E

expdigits :: Lens' Exp (NonEmpty DecDigit)

minusplus :: Lens' Exp (Maybe Bool)

class HasExp c where

Typeclass for things that may have an Exp component.

Minimal complete definition

exp

Methods

exp :: Lens' c Exp

ex :: Lens' c E

expdigits :: Lens' c (NonEmpty DecDigit)

minusplus :: Lens' c (Maybe Bool)

Instances

HasExp Exp

Defined in Waargonaut.Types.JNumber

Methods

exp :: Lens' Exp Exp

ex :: Lens' Exp E

expdigits :: Lens' Exp (NonEmpty DecDigit)

minusplus :: Lens' Exp (Maybe Bool)

type JInt = JInt' DecDigit

Type alias to allow us to constrain the first digit type.

data JInt' digit

Represent a JSON "int"

Constructors

JZero

JIntInt digit [DecDigit]

Instances

Eq digit => Eq (JInt' digit)

Defined in Waargonaut.Types.JNumber

Methods

(==) :: JInt' digit -> JInt' digit -> Bool

(/=) :: JInt' digit -> JInt' digit -> Bool

Ord digit => Ord (JInt' digit)

Defined in Waargonaut.Types.JNumber

Methods

compare :: JInt' digit -> JInt' digit -> Ordering

(<) :: JInt' digit -> JInt' digit -> Bool

(<=) :: JInt' digit -> JInt' digit -> Bool

(>) :: JInt' digit -> JInt' digit -> Bool

(>=) :: JInt' digit -> JInt' digit -> Bool

max :: JInt' digit -> JInt' digit -> JInt' digit

min :: JInt' digit -> JInt' digit -> JInt' digit

Show digit => Show (JInt' digit)

Defined in Waargonaut.Types.JNumber

Methods

showsPrec :: Int -> JInt' digit -> ShowS

show :: JInt' digit -> String

showList :: [JInt' digit] -> ShowS

Prisms

_JZero :: Prism' JInt ()

Prism for JSON zeroes.

_JIntInt :: Prism' (JInt' digit) (digit, [DecDigit])

Prism for JSON non-zero values.

_JNumberInt :: Prism' JNumber Int

Prism between a JNumber and a Haskell Int. This prism will go via the Scientific type to handle the various exponent and fractional values before attempting to convert it to a bounded integer.

_JNumberScientific :: Prism' JNumber Scientific

Prism for trying to move between JNumber and Scientific

>>> _JNumberScientific # (read "-3.45e-2")
JNumber {_minus = True, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Just (Exp {_ex = Ee, _minusplus = Just True, _expdigits = DecDigit2 :| []})}

>>> _JNumberScientific # (read "-1.23456e-787")
JNumber {_minus = True, _numberint = JIntInt DecDigit1 [], _frac = Just (Frac (DecDigit2 :| [DecDigit3,DecDigit4,DecDigit5,DecDigit6])), _expn = Just (Exp {_ex = Ee, _minusplus = Just True, _expdigits = DecDigit7 :| [DecDigit8,DecDigit7]})}

>>> _JNumberScientific # (read "-1.23456e791")
JNumber {_minus = True, _numberint = JIntInt DecDigit1 [], _frac = Just (Frac (DecDigit2 :| [DecDigit3,DecDigit4,DecDigit5,DecDigit6])), _expn = Just (Exp {_ex = Ee, _minusplus = Just False, _expdigits = DecDigit7 :| [DecDigit9,DecDigit1]})}

Parser

parseJNumber :: (Monad f, CharParsing f) => f JNumber

Parse a JSON numeric value.

>>> testparsethen parseJNumber "600x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit6 [DecDigit0,DecDigit0], _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "800x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit8 [DecDigit0,DecDigit0], _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "3x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit3 [], _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "-3x"
Right (JNumber {_minus = True, _numberint = JIntInt DecDigit3 [], _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "0x"
Right (JNumber {_minus = False, _numberint = JZero, _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "-0x"
Right (JNumber {_minus = True, _numberint = JZero, _frac = Nothing, _expn = Nothing},'x')

>>> testparsethen parseJNumber "3.45x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Nothing},'x')

>>> testparsethen parseJNumber "-3.45x"
Right (JNumber {_minus = True, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Nothing},'x')

>>> testparsethen parseJNumber "3.45e10x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Just (Exp {_ex = Ee, _minusplus = Nothing, _expdigits = DecDigit1 :| [DecDigit0]})},'x')

>>> testparsethen parseJNumber "3e10x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit3 [], _frac = Nothing, _expn = Just (Exp {_ex = Ee, _minusplus = Nothing, _expdigits = DecDigit1 :| [DecDigit0]})},'x')

>>> testparsethen parseJNumber "3.45e+10x"
Right (JNumber {_minus = False, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Just (Exp {_ex = Ee, _minusplus = Just False, _expdigits = DecDigit1 :| [DecDigit0]})},'x')

>>> testparsethen parseJNumber "-3.45e-02x"
Right (JNumber {_minus = True, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (DecDigit4 :| [DecDigit5])), _expn = Just (Exp {_ex = Ee, _minusplus = Just True, _expdigits = DecDigit0 :| [DecDigit2]})},'x')

>>> isLeft (testparsethen parseJNumber "-3.45ex")
True

>>> isLeft (testparsethen parseJNumber "-.45e1x")
True

Other

jNumberToScientific :: JNumber -> Maybe Scientific

Returns a normalised Scientific value or Nothing if the exponent is out of the range [minBound,maxBound::Int]

>>> jNumberToScientific JNumber {_minus = True, _numberint = JIntInt DecDigit3 [], _frac = Just (Frac (D.x4 :| [D.x5])), _expn = Just (Exp {_ex = Ee, _minusplus = Just True, _expdigits = D.x0 :| [D.x2]})}
Just -3.45e-2

>>> jNumberToScientific JNumber {_minus = True, _numberint = JIntInt D.x1 [D.x2, D.x3], _frac = Just (Frac (D.x4 :| [D.x5, D.x6])), _expn = Just (Exp {_ex = Ee, _minusplus = Just True, _expdigits = (D.x7 :| [D.x8, D.x9])})}
Just -1.23456e-787

>>> jNumberToScientific JNumber {_minus = True, _numberint = JIntInt D.x1 [D.x2, D.x3], _frac = Just (Frac (D.x4 :| [D.x5, D.x6])), _expn = Just (Exp {_ex = Ee, _minusplus = Just False, _expdigits = (D.x7 :| [D.x8, D.x9])})}
Just -1.23456e791

jIntToDigits :: JInt -> NonEmpty DecDigit

Helper to convert a JInt to a NonEmpty list of component digits.