[Issue 8269] New: The 'with' statement does not observe temporary object lifetime

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8269

           Summary: The 'with' statement does not observe temporary object
                    lifetime
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: acehreli at yahoo.com


--- Comment #0 from Ali Cehreli <acehreli at yahoo.com> 2012-06-19 12:23:56 PDT ---
The spec at

  http://dlang.org/statement.html#WithStatement

says:

<quote>
The WithStatement
with (expression)
{
  ...
  ident;
}
is semantically equivalent to:
{
  Object tmp;
  tmp = expression;
  ...
  tmp.ident;
}
</quote>

Unfortunately, the anonymous object in the following code is destroyed even
before entering the 'with' scope:

import std.stdio;

struct S {
    this(int i = 0)
    {
        writeln("constructed");
    }

    ~this()
    {
        writeln("destructed");
    }
}

void main() {
    with(S(1)) {
        writeln("inside 'with' statement");
    }
}

Observed output:

  constructed
  destructed
  inside 'with' statement

Expected output:

  constructed
  inside 'with' statement
  destructed

Ali

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------