complex (complex<>::real(_Tp), [...]): Add per DR 387.

2008-05-25  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/complex (complex<>::real(_Tp), complex<>::imag(_Tp),
	complex<float>::real(float), complex<float>::imag(float),
	complex<double>::real(double), complex<double>::imag(double),
	complex<long double>::real(long double),
	complex<long double>::imag(long double)): Add per DR 387.
	(complex<>::real(), complex<>::imag(), complex<float>::real(),
	complex<float>::imag(), complex<double>::real(),
	complex<double>::imag(), complex<long double>::real(),
	complex<long double>::imag(long double)): Adjust in C++0x mode.
	(real(complex<>&), imag(complex<>&), real(const complex<>&),
	imag(const complex<>&)): Likewise.
	* testsuite/26_numerics/complex/dr387.cc: New.
	* doc/xml/manual/intro.xml: Add an entry for DR 387.

From-SVN: r135878