fromHexString

lib.trivial.fromHexString

Docs pulled from | This Revision | about 1 hour ago

Convert a hexadecimal string to it's integer representation.

Type

fromHexString :: String -> [ String ]

Examples

fromHexString "FF"
=> 255

fromHexString "0x7fffffffffffffff"
=> 9223372036854775807

Noogle detected

Aliases

lib.fromHexString

Implementation

The following is the current implementation of this function.

fromHexString =
    str:
    let
      match = builtins.match "(0x)?([0-7]?[0-9A-Fa-f]{1,15})" str;
    in
    if match != null then
      (fromTOML "v=0x${builtins.elemAt match 1}").v
    else
      # TODO: Turn this into a `throw` in 26.05.
      assert lib.warn "fromHexString: ${
        lib.generators.toPretty { } str
      } is not a valid input and will be rejected in 26.05" true;
      let
        noPrefix = lib.strings.removePrefix "0x" (lib.strings.toLower str);
      in
      (fromTOML "v=0x${noPrefix}").v;