
Ublas : 
Subject: [ublas] A ublas::tie to vector expressions?
From: Jesse Perla (jesseperla_at_[hidden])
Date: 20100714 10:52:36
The boost assignment is really nice, but what about the other direction
(from vector to scalars)? This comes up quite often.
ublas::vector<double> f()
{
ublas::vector<double> v(2);
v(0) = 1.1;
v(1) = 2.1;
return v;
}
double x;
double y;
ublas::vector<double> v(2);
v(0) = 1.1;
v(1) = 2.1;
ublas::tie(x, y) = v;
ublas::tie(x, y) = f(); //With function
ublas::matrix<double> mat(2,2); //....
ublas::tie(x, y) = row(mat, 0);
ublas::vector<int> v2(2);
v2(0) = 1;
v2(1) = 2;
int z;
ublas::tie(x, z); //With different types
For vector expressions, this seems to be easy enough to do. See the
attached basic implementation for 2 parameters. With a little boost
preprocessor, this could be fairly general. What do people think? Are
there any boost PP who could generalize this?
Jesse