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SparseCore: honor Eigen::NoChange in SparseMatrix/SparseVector resize (#656)

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libeigen/eigen!2569

Closes #656

Co-authored-by: Rasmus Munk Larsen <rlarsen@nvidia.com>
This commit is contained in:
Rasmus Munk Larsen
2026-05-18 21:36:29 -07:00
co-authored by Rasmus Munk Larsen
parent 8a079e1a9e
commit af2fd98144
4 changed files with 55 additions and 1 deletions
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test/sparse_basic.cpp
+32
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@@ -935,6 +935,38 @@ void sparse_basic(const SparseMatrixType& ref) {
}
}
// test resize / conservativeResize with Eigen::NoChange (bug #656)
{
SparseMatrixType m1(rows, cols);
DenseMatrix refMat1 = DenseMatrix::Zero(rows, cols);
initSparse<Scalar>(density, refMat1, m1);
SparseMatrixType m2 = m1;
m1.conservativeResize(NoChange, cols + 2);
refMat1.conservativeResize(NoChange, cols + 2);
refMat1.rightCols(2).setZero();
VERIFY_IS_APPROX(m1, refMat1);
m1.conservativeResize(rows + 1, NoChange);
refMat1.conservativeResize(rows + 1, NoChange);
refMat1.bottomRows(1).setZero();
VERIFY_IS_APPROX(m1, refMat1);
m2.resize(NoChange, cols + 4);
VERIFY(m2.rows() == rows && m2.cols() == cols + 4);
VERIFY(m2.nonZeros() == 0);
m2.resize(rows + 2, NoChange);
VERIFY(m2.rows() == rows + 2 && m2.cols() == cols + 4);
SparseVector<Scalar, ColMajor, StorageIndex> v(rows);
v.resize(NoChange, 1);
VERIFY(v.size() == rows);
v.resize(rows + 3, NoChange);
VERIFY(v.size() == rows + 3);
}
// test Identity matrix
{
DenseMatrix refMat1 = DenseMatrix::Identity(rows, rows);