re PR libstdc++/20352 (FAIL: 26_numerics/complex/pow.cc execution test)

2005-03-15  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/20352
	* include/std/std_complex.h (pow(const complex<_Tp>&,
	const _Tp&)): On non-c99 platforms, don't try to compute
	log of complex zero.

From-SVN: r96538

libstdc++-v3/ChangeLog

+2005-03-15  Paolo Carlini  <pcarlini@suse.de>
+
+	PR libstdc++/20352
+	* include/std/std_complex.h (pow(const complex<_Tp>&,
+	const _Tp&)): On non-c99 platforms, don't try to compute
+	log of complex zero.
+
 2005-03-10  Ben Elliston  <bje@au.ibm.com>
 
 	* testsuite/22_locale/locale/cons/12658_thread-1.cc: Don't XFAIL

libstdc++-v3/include/std/std_complex.h

@@ -944,6 +944,10 @@ namespace std
     complex<_Tp>
     pow(const complex<_Tp>& __x, const _Tp& __y)
     {
+#ifndef _GLIBCXX_USE_C99_COMPLEX
+      if (__x == _Tp())
+	return _Tp();
+#endif
       if (__x.imag() == _Tp() && __x.real() > _Tp())
         return pow(__x.real(), __y);