http://d.puremagic.com/issues/show_bug.cgi?id=6815

           Summary: Char array is turned into string expression during
                    constant folding
           Product: D
           Version: D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: dawg@dawgfoto.de


--- Comment #0 from dawg@dawgfoto.de 2011-10-15 20:35:22 PDT ---
struct DChars
{
    dchar foo()
    {
        return ary[0];
    }

    dchar[] ary;
}

DChars get()
{
    DChars s;
    s.ary ~= 'H';
    s.ary ~= 'e';
    return s;
}

enum dchars = get().foo();
----

Which will bark:
Error: cannot cast a read-only string literal to mutable in CTFE

Cat in constfold.c turns null ~ char into a string expression even though the type of null is not a string but a char array.

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Denis <verylonglogin.reg@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |verylonglogin.reg@gmail.com


--- Comment #1 from Denis <verylonglogin.reg@gmail.com> 2012-02-13 14:44:03 MSK ---
Probably the same issue:
---
char[] f() {
    char[] buff = new char[1];
    buff[0] = 0; // works
    buff.ptr[0] = 0; // works
    *(&buff[0]) = 0; // works
    char* t = &buff[0]; *t = 0;   // error
    foreach(ref el; buff) el = 0; // error
    return buff;
}

static assert(f() == "\0");
---
Where `error` means: `Error: cannot cast a read-only string literal to mutable in CTFE`

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--- Comment #2 from Don <clugdbug@yahoo.com.au> 2012-02-23 02:08:29 PST ---
(In reply to comment #1)
> Probably the same issue:

Nope, completely different.

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