On Wednesday 13 July 2011 11:56:10 Tyro[a.c.edwards] wrote:
> Methinks function local imports (introduced in 2.054) is a great idea,
> however if it is to be allowed, I believe it should provide all the
> functionality of global imports: which it currently does not.
>
> import std.stdio;
> import std.string;
> import std.conv;
>
> // Note: all of these import formats work if imported here but only
> // the first work if imported locally to the function.
>
> //import std.utf;
> //import std.utf: toUTF16z;
> //import std.utf: wcp = toUTF16z;
>
> void main()
> {
> auto s = "漢字を書くのはどうかな～？";
> auto s1 = genText(s);
> writeln(to!string(typeid(s1)));
> }
>
> auto genText(string t)
> {
> import std.utf; // This works
> //import std.utf: toUTF16z; // This doesn't
> //import std.utf: wcp = toUTF16z; // Neither does this
>
> version(Unicode)
> {
> // Note: Everything here works with global import
> // but only the first line works with function local imports
>
> return toUTF16z(t); // This works
> //return t.toUTF16z; // This doesn't
> //return wcp(t); // Neither does this
> //return t.wcp; // Or this
> }
> else
> {
> return t.toStringz;
> }
> }
import std.utf: toUTF16z;
is broken to begin with:
http://d.puremagic.com/issues/show_bug.cgi?id=314
http://d.puremagic.com/issues/show_bug.cgi?id=5161
Rather than just importing the symbol like it should, a selective import
essentially create a new symbol. So, that's probably why it doesn't work when
importing inside of a function.
> [OT - toUTFz]
>
> Wasn't there discussion about adding toUTFz to the std.utf? For some
> reason I thought that was forthcoming in 2.054... whatever happened there?
It hasn't been merged in yet. It should be in 2.055.
https://github.com/D-Programming-Language/phobos/pull/123
- Jonathan M Davis
