Function sprs_ldl::ldl_symbolic

pub fn ldl_symbolic<N, PStorage>(mat: CsMatView<N>, perm: &Permutation<PStorage>, l_colptr: &mut [usize], parents: ParentsViewMut, l_nz: &mut [usize], flag_workspace: &mut [usize], check_symmetry: SymmetryCheck) where N: Clone + Copy + PartialEq, PStorage: Deref<Target=[usize]>

Perform a symbolic LDLt decomposition of a symmetric sparse matrix