http://d.puremagic.com/issues/show_bug.cgi?id=6632

           Summary: toUTFz sometimes does not work with const parameters
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody@puremagic.com
        ReportedBy: andrej.mitrovich@gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-09-08 17:47:46 PDT ---
import std.utf;

void main()
{
    const char[] c = "";
    auto res1 = toUTFz!(const(char)*)(c);  // doesn't work
    auto res2 = toUTFz!(const(wchar)*)(c);  // works ok
}

D:\DMD\dmd2\windows\bin\..\..\src\phobos\std\utf.d(1481): Error: variable
std.utf.toUTFz!(const(char)*,const(char[])).toUTFz.str cannot modify const

test.d(8): Error: template instance std.utf.toUTFz!(const(char)*,const(char[]))
error instantiating

Funny thing is it works fine with immutable:

immutable char[] c = "";
auto res1 = toUTFz!(const(char)*)(c);  // ok

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zeljkog <zeljko.grk@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zeljko.grk@gmail.com


--- Comment #1 from zeljkog <zeljko.grk@gmail.com> 2011-09-09 15:36:01 CEST ---
It is compiler issue:

import std.stdio;

void f(S)(S str){
    writeln(str);
}

alias f!(string) fc;
alias f!(wstring) fc;

void main(){
    fc("foo");      // L11

//~     fc("foo"c);     // works
//~     auto s = "foo";
//~      fc(s);       // works
}

//~ Compilation breaks with message:

//~ bug.d(11): Error: function alias bug.f called with argument types:
//~     ((string))
//~ matches both:
//~     bug.f!(string).f(string str)
//~ and:
//~     bug.f!(immutable(wchar)[]).f(immutable(wchar)[] str)

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--- Comment #2 from zeljkog <zeljko.grk@gmail.com> 2011-09-09 15:44:55 CEST ---
Sorry, it's another issue.

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Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |major


--- Comment #3 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-11-09 09:58:23 PST ---
import std.utf;

const wchar[] foo = "foo";

void main()
{
    auto wptr = toUTFz!(const(wchar)*)(foo);  // NG
}

It would be great if toUTFz worked in *all* cases.

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Jonathan M Davis <jmdavisProg@gmx.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |jmdavisProg@gmx.com


--- Comment #4 from Jonathan M Davis <jmdavisProg@gmx.com> 2011-11-09 10:19:23 PST ---
Well obviously, the fact that it doesn't is a bug. I expect that I'll have it fixed before the next release. I probably should have had it fixed for the last one but have been busy and didn't get around to it.

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--- Comment #5 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-11-09 10:51:57 PST ---
Thanks Jonathan.

This kind of call is common when passing wstring constants to Win API functions.

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--- Comment #6 from Jonathan M Davis <jmdavisProg@gmx.com> 2011-11-12 11:00:47 PST ---
By the way, in case you didn't notice, I should point out that thanks to the discussion on the newsgroup about it, toUTF16z is no longer scheduled for deprecation. It's still using its old implementation internally, but should be switched over to using toUTFz by the next release (which will allow it to take all of the string types). So, if your use case of toUTFz matches toUTF16z, then you can use that.

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--- Comment #7 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-11-12 11:24:01 PST ---
Ok good to know, this will help porting older code. Thanks.

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--- Comment #8 from Jonathan M Davis <jmdavisProg@gmx.com> 2011-11-20 04:52:50 PST ---
https://github.com/D-Programming-Language/phobos/pull/279

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Andrej Mitrovic <andrej.mitrovich@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


--- Comment #9 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2012-01-04 06:57:43 PST ---
Fixed in 2.057, thanks Jonathan.

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