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more efficient handling of expressions

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This commit is contained in:
conrad
2025-01-18 23:56:57 +10:00
parent 0ec6b425e6
commit c83caaa0da
1 changed files with 26 additions and 6 deletions
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include/armadillo_bits/op_resize_meat.hpp
+26 -6
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@@ -34,16 +34,36 @@ op_resize::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_resize>& in)
const uword new_n_rows = in.aux_uword_a;
const uword new_n_cols = in.aux_uword_b;
const unwrap<T1> tmp(in.m);
const Mat<eT>& A = tmp.M;
if(&out == &A)
if(is_Mat<T1>::value)
{
op_resize::apply_mat_inplace(out, new_n_rows, new_n_cols);
const unwrap<T1> U(in.m);
const Mat<eT>& A = U.M;
if(&out == &A)
{
op_resize::apply_mat_inplace(out, new_n_rows, new_n_cols);
}
else
{
op_resize::apply_mat_noalias(out, A, new_n_rows, new_n_cols);
}
}
else
{
op_resize::apply_mat_noalias(out, A, new_n_rows, new_n_cols);
const quasi_unwrap<T1> U(in.m);
if(U.is_alias(out))
{
Mat<eT> tmp;
op_resize::apply_mat_noalias(tmp, U.M, new_n_rows, new_n_cols);
out.steal_mem(tmp);
}
else
{
op_resize::apply_mat_noalias(out, U.M, new_n_rows, new_n_cols);
}
}
}