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Subject: [Boost-users] [proto] extends example not compiling
From: alfC (alfredo.correa_at_[hidden])
Date: 2009-12-15 23:18:19
Is this example, contained in the boost.Proto manual supposed to
compile?
#include<complex>
#include <boost/proto/core.hpp>
#include <boost/proto/context.hpp>
#include <boost/proto/debug.hpp>
#include<boost/proto/extends.hpp>
template<class T, class Dummy = boost::proto::is_proto_expr>
struct my_complex
{
BOOST_PROTO_EXTENDS(
typename boost::proto::terminal<std::complex<T> >::type
, my_complex<T>
, boost::proto::default_domain
)
};
int main()
{
my_complex<int> c0, c1;
c0 + c1; // OK, operator+ found now!
}
I get this error (with gcc 4.3 and gcc 4.4):
proto_complex.cpp:10: error: expected nested-name-specifier before
typename
proto_complex.cpp:10: error: two or more data types in declaration of
proto_base_expr
proto_complex.cpp:10: error: proto_base_expr has not been declared
proto_complex.cpp:10: error: proto_base_expr has not been declared
The strangest thing is that when I replace the macro by its explicit
code the code seems to compile.
Thank you,
Alfredo
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