[Issue 11351] New: Destructor of "with" statement expression result is called too soon

d-bugmail at puremagic.com d-bugmail at puremagic.com
Fri Oct 25 05:05:14 PDT 2013


http://d.puremagic.com/issues/show_bug.cgi?id=11351

           Summary: Destructor of "with" statement expression result is
                    called too soon
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: thecybershadow at gmail.com


--- Comment #0 from Vladimir Panteleev <thecybershadow at gmail.com> 2013-10-25 15:05:12 EEST ---
import std.stdio;

struct S
{
    this(this) { writeln("this(this)"); }
    ~this() { writeln("~this()"); }
}

S makeS()
{
    return S();
}

void main()
{
    writeln("before");
    with (makeS())
    {
        writeln("inside");
    }
    writeln("after");
}

-------------------------------------------

This program currently prints:

before
~this()
inside
after

This indicates that the S temporary inside the "with" block is already
destroyed (and no copy is made).

Fixing this would allow using "with" together with scope statements, as
proposed here:
http://forum.dlang.org/post/l4ccb4$25ul$1@digitalmars.com

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