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more changes in ScalarMultiple, reintroduce FloatingPoint in NumTraits, improve

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examples
This commit is contained in:
Benoit Jacob
2007-12-26 09:25:00 +00:00
parent 05a49547e1
commit 6b9370e0f0
7 changed files with 57 additions and 25 deletions
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18
doc/examples/class_Cast.cpp
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@@ -3,14 +3,16 @@ USING_PART_OF_NAMESPACE_EIGEN
using namespace std;
template<typename Scalar, typename Derived>
Eigen::Cast<double, Derived>
castToDouble(const MatrixBase<Scalar, Derived>& m)
const Eigen::Cast<
typename Eigen::NumTraits<Scalar>::FloatingPoint,
Derived
>
castToFloatingPoint(const MatrixBase<Scalar, Derived>& m)
{
return Eigen::Cast<double, Derived>(m.ref());
// note: tempting as it is, writing "m.cast<double>()" here
// causes a compile error with g++ 4.2, apparently due to
// g++ getting confused by the many template types and
// template arguments involved.
return Eigen::Cast<
typename Eigen::NumTraits<Scalar>::FloatingPoint,
Derived
>(m.ref());
}
int main(int, char**)
@@ -18,6 +20,6 @@ int main(int, char**)
Matrix2i m = Matrix2i::random();
cout << "Here's the matrix m. It has coefficients of type int."
<< endl << m << endl;
cout << "Here's 0.05*m:" << endl << 0.05 * castToDouble(m) << endl;
cout << "Here's m/20:" << endl << castToFloatingPoint(m)/20 << endl;
return 0;
}