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Make SparseMatrix::coeff() returns a const reference and add a non const version of SparseMatrix::diagonal()

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Gael Guennebaud
2014-12-01 14:41:39 +01:00
parent b1f9f603a0
commit b26e697182
3 changed files with 42 additions and 7 deletions
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4
Eigen/src/SparseCore/CompressedStorage.h
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@@ -143,10 +143,10 @@ class CompressedStorage
}
/** Like at(), but the search is performed in the range [start,end) */
inline Scalar atInRange(size_t start, size_t end, Index key, const Scalar& defaultValue = Scalar(0)) const
inline const Scalar& atInRange(size_t start, size_t end, Index key, const Scalar& defaultValue = Scalar(0)) const
{
if (start>=end)
return Scalar(0);
return defaultValue;
else if (end>start && key==m_indices[end-1])
return m_values[end-1];
// ^^ optimization: let's first check if it is the last coefficient