D10.Char.Quotes

Documentation

d10 :: QuasiQuoter

A single base-10 digit.

This quasi-quoter, when used as an expression, produces a value of type D10.

>>> d10Nat [d10|5|]
5

>>> d10Nat [d10|a|]
...
... d10 must be between 0 and 9
...

>>> d10Nat [d10|58|]
...
... d10 must be a single character
...

This quasi-quoter can also be used as a pattern.

>>> :{
      case (charD10Maybe '5') of
        Just [d10|4|] -> "A"
        Just [d10|5|] -> "B"
        _             -> "C"
>>> :}
"B"

>>> :{
      case (charD10Maybe '5') of
        Just [d10|x|] -> "A"
        Just [d10|5|] -> "B"
        _             -> "C"
>>> :}
...
... d10 must be between 0 and 9
...

d10list :: QuasiQuoter

A list of base-10 digits.

This quasi-quoter, when used as an expression, produces a value of type [D10].

>>> d10Nat <$> [d10list||]
[]

>>> d10Nat <$> [d10list|5|]
[5]

>>> d10Nat <$> [d10list|58|]
[5,8]

>>> d10Nat <$> [d10list|a|]
...
... d10 must be between 0 and 9
...

This quasi-quoter can also be used as a pattern.

>>> :{
      case [d10list|56|] of
        [d10list|41|] -> "A"
        [d10list|56|] -> "B"
        _             -> "C"
>>> :}
"B"

>>> :{
      case [d10list|56|] of
        [d10list|4x|] -> "A"
        [d10list|56|] -> "B"
        _             -> "C"
>>> :}
...
... d10 must be between 0 and 9
...