:: Char -> Int package:base

Convert a single digit Char to the corresponding Int. This function fails unless its argument satisfies isHexDigit, but recognises both upper- and lower-case hexadecimal digits (that is, '0'..'9', 'a'..'f', 'A'..'F').

Examples

Characters '0' through '9' are converted properly to 0..9:

>>> map digitToInt ['0'..'9']
[0,1,2,3,4,5,6,7,8,9]

Both upper- and lower-case 'A' through 'F' are converted as well, to 10..15.

>>> map digitToInt ['a'..'f']
[10,11,12,13,14,15]

>>> map digitToInt ['A'..'F']
[10,11,12,13,14,15]

Anything else throws an exception:

>>> digitToInt 'G'
*** Exception: Char.digitToInt: not a digit 'G'

>>> digitToInt '♥'
*** Exception: Char.digitToInt: not a digit '\9829'

The fromEnum method restricted to the type Char.

Calls perror to indicate an unknown format letter for a given type.

Convert to an Int. It is implementation-dependent what fromEnum returns when applied to a value that is too large to fit in an Int.

Computes the storage requirements (in bytes) of the argument. The value of the argument is not used.

Computes the alignment constraint of the argument. An alignment constraint x is fulfilled by any address divisible by x. The alignment must be a power of two if this instance is to be used with alloca or allocaArray. The value of the argument is not used.