View source code
Display the source code in std/encoding.d from which this page was generated on github.
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function std.encoding.isValidCodeUnit

Returns true if the code unit is legal. For example, the byte 0x80 would not be legal in ASCII, because ASCII code units must always be in the range 0x00 to 0x7F.

bool isValidCodeUnit(E) (
  E c


Unicode 5.0, ASCII, ISO-8859-1, ISO-8859-2, WINDOWS-1250, WINDOWS-1251, WINDOWS-1252


c the code unit to be tested


assert(!isValidCodeUnit(cast(char) 0xC0));
assert(!isValidCodeUnit(cast(char) 0xFF));
assert( isValidCodeUnit(cast(wchar) 0xD800));
assert(!isValidCodeUnit(cast(dchar) 0xD800));
assert(!isValidCodeUnit(cast(AsciiChar) 0xA0));
assert( isValidCodeUnit(cast(Windows1250Char) 0x80));
assert(!isValidCodeUnit(cast(Windows1250Char) 0x81));
assert( isValidCodeUnit(cast(Windows1251Char) 0x80));
assert(!isValidCodeUnit(cast(Windows1251Char) 0x98));
assert( isValidCodeUnit(cast(Windows1252Char) 0x80));
assert(!isValidCodeUnit(cast(Windows1252Char) 0x81));


Janice Caron


Boost License 1.0.