C++, name collision across different namespace
- by aaa
hello.
I am baffled by the following name collision:
namespace mp2 {
boost::numeric::ublas::matrix_range<M>
slice(M& m, const R1& r1, const R2& r2) {
namespace ublas = boost::numeric::ublas;
ublas::range r1_(r1.begin(), r1.end()), r2_(r2.begin(), r2.end());
return ublas::matrix_range<M>(m, r1_, r2_);
}
double energy(const Wavefunction &wf) {
const Wavefunction::matrix& C = wf.coefficients();
int No = wf.occupied().size();
foreach (const Basis::MappedShell& P, basis.shells()) {
slice(C, range(No), range(P));
the error from g++4.4 is
7 In file included from mp2.cpp:1:
8 /usr/include/boost/numeric/ublas/fwd.hpp: In function âdouble mp2::energy(const Wavefunction&)â:
9 /usr/include/boost/numeric/ublas/fwd.hpp:32: error: âboost::numeric::ublas::sliceâ is not a function,
10 ../../src/mp2/energy.hpp:98: error: conflict with âtemplate<class M, class R1, class R2> boost::numeric::ublas::matrix_range<M> mp2::slice(M&, const R1&, const R2&)â
11 ../../src/mp2/energy.hpp:123: error: in call to âsliceâ
12 /usr/include/boost/numeric/ublas/fwd.hpp:32: error: âboost::numeric::ublas::sliceâ is not a function,
13 ../../src/mp2/energy.hpp:98: error: conflict with âtemplate<class M, class R1, class R2> boost::numeric::ublas::matrix_range<M> mp2::slice(M&, const R1&, const R2&)â
14 ../../src/mp2/energy.hpp:129: error: in call to âsliceâ
15 make: *** [mp2.lo] Error 1
ublas segment is
namespace boost { namespace numeric { namespace ublas {
typedef basic_slice<> slice;
why is slice in ublas collides with slice in mp2?
I and fairly certain there is no using namespace ublas in the code and in includes.
thank you
