Convert String to Int assuming base 10.

parseInt "314159" == Ok 314159
parseInt "foo" = Err (OutOfRange 'o')

Convert String to Int assuming base 8 (octal). No leading '0' is required.

Convert String to Int assuming base 16 (hexadecimal). No leading characters are expected; input starting with "0x" (or any other out of range character) will cause an Err return.

Convert String to Int assuming given radix. Radix can be any of 2..36. Leading zeroes are ignored. Valid characters are the alphanumerics: those in the ASCII range [0-9a-zA-Z]. Case does not matter. For radixes beyond 16 the normal [A-F] range for hexadecimal is extended in the natural way. Any invalid character results in a Err return. Any valid character outside of the range defined by the radix also results in an Err. In particular, any initial '-' or ' ' (space) is an error. An Ok return means that the entire input string was consumed. The empty string results in Ok 0

parseIntRadix 16 "DEADBEEF" = Ok 3735928559

Convert Int to String assuming given radix. Radix values from 2..36 are allowed; others result in an Err InvalidRadix. Negative numbers get an initial '-'.

toRadix 16 1234 == Ok "4D2"
toRadix 8 -99 == Ok "-143"

Convert Int to String assuming given radix. Radix value must be in 2..36 (not checked, so it can crash).

toRadix' 16 3735928559 == "DEADBEEF"
toRadix' 37 36 --> crash

Convert Int to octal String.

Convert Int to hexadecimal String.

Convert an alphanumeric character to an int value as a "digit", validating against the given radix. Alphabetic characters past "F" are extended in the natural way: 'G' == 16, 'H' == 17, etc. Upper and lower case are treated the same. Passing a non-alphanumeric character results in the InvalidChar error. If the resulting value would be greater than the given radix, an OutOfRange error results instead.

Convert Int to corresponding Char representing it as a digit. Values from 10..15 are represented as upper-case 'A'..'F'. Values 16 and above extend the hexadecimal characters in the natural way. This function assumes that the input value is in the range 0 .. 36.

Possible Result.Err returns from these functions.