[Bug libstdc++/19544] Difference in behaviour if default constructor added

[gdr at integrable-solutions dot net]

------- Additional Comments From gdr at integrable-solutions dot net  2005-01-21 02:25 -------
Subject: Re:  Difference in behaviour if default constructor added

"bangerth at dealii dot org" <gcc-bugzilla@gcc.gnu.org> writes:

| To be completely clear, the compiler generated default constructor is 
|   ptr() : a(0) {} 
| not 
|   ptr() {} 
| Thus, it _does_ initialize 'a'. 

I don't follow you here.

If one writes

    ptrwrapper() : ptr() { }

with the above syntax, ptr is *value initialized*, e.g. it is set to
zero.  That is not to be confused with callig the default constructor
(which is trivial) for ptr.

-- Gaby


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19544