Sunperf and complex

Question

Hi
I'm getting an annoying 'problem' using the sunperf
library with complex types:
if I copy word for word the example you find at the
end of 'man complex', it compiles fine. If I just add
#include <sunperf.h> it doesn't. Clearly, there is a clash somewhere, is it intentional?
Has anybody an insight?
#include <complex>
int main(...){
complex<double> a(1,1); //is fine
#include <sunperf.h>
#include <complex>
int main(...){
complex<double> a(1,1); //is not?
Error: No parameters provided for template.
CC -V is CC: Sun WorkShop 6 update 2 C++ 5.3 Patch 111685-01 2001/08/01
and uname -a:
SunOS tye 5.8 Generic_108528-09 sun4u sparc SUNW,Ultra-5_10
Ph

Answer 1

Header <sunperf.h> has a global struct type "complex"> (The Sun Performance Library has a C interface.)
The standard C++ <complex> header has a class template "complex" in namespace std .
To avoid the name conflicts, you have to be cafeful about namespaces. Code like the example
#include <sunpef..h>
#include <complex>
complex<double> a(1,1);
won't compile because the only "complex" visible is the C struct, not the template. If you write
std::complex<double> a(1,1);
the code will compile.
If you put
using namespace std;
or
using std::complex;
in your C++ code, it will cause a conflict with the complex in <sunperf.h>. To use both libraries, you must explictily qualify the C+ complex template types with "std::".