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PR libstdc++/24975 (basic_string)

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2005-11-23  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/24975 (basic_string)
	* include/bits/basic_string.h (_Rep::_S_empty_rep): Avoid
	strict-aliasing warnings.

From-SVN: r107447
This commit is contained in:
Paolo Carlini 2005-11-24 01:29:51 +00:00 • committed by Paolo Carlini
parent 89de9021fb
commit 7fdc03073c
2 changed files with 13 additions and 1 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
2005-11-23 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/24975 (basic_string)
* include/bits/basic_string.h (_Rep::_S_empty_rep): Avoid
strict-aliasing warnings.
2005-11-22 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/24975

8
libstdc++-v3/include/bits/basic_string.h
View file

@ -177,7 +177,13 @@ namespace std
static _Rep&
_S_empty_rep()
{ return *reinterpret_cast<_Rep*>(&_S_empty_rep_storage); }
{
// NB: Mild hack to avoid strict-aliasing warnings. Note that
// _S_empty_rep_storage is never modified and the punning should
// be reasonably safe in this case.
void* __p = reinterpret_cast<void*>(&_S_empty_rep_storage);
return *reinterpret_cast<_Rep*>(__p);
}
bool
_M_is_leaked() const