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.codePoints

Returns a foreachable struct which can bidirectionally iterate over all code points in a string.

CodePoints!E codePoints(E) (
  immutable(E)[] s

The input to this function MUST be validly encoded. This is enforced by the function's in-contract.

You can foreach either with or without an index. If an index is specified, it will be initialized at each iteration with the offset into the string at which the code point begins.


This function supersedes std.utf.decode().


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


s the string to be decoded


string s = "hello world";
foreach (c;codePoints(s))
    // do something with c (which will always be a dchar)

Note that, currently, foreach (c:codePoints(s)) is superior to foreach (c;s) in that the latter will fall over on encountering U+FFFF.


string s = "hello";
string t;
foreach (c;codePoints(s))
    t ~= cast(char) c;
writeln(s); // t


Janice Caron


Boost License 1.0.