floating-validation.md
In glyrepr: Representation for Glycan Compositions and Structures

floating metadata rejects unsupported fields

Code
  glycan_structure(graph)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! Floating part metadata contains unsupported fields.
  x Unsupported field: probability.

floating metadata rejects duplicated fields

Code
  glycan_structure(graph)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! Floating part metadata contains duplicated fields.
  x Duplicated field: root.

floating metadata requires every core field

Code
  glycan_structure(graph)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! Floating part metadata is incomplete.
  x Missing field: parents.

floating node metadata must describe exactly one component

Code
  glycan_structure(duplicate_nodes)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! Floating part node indices must be unique.

Code
  glycan_structure(missing_root)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! Floating part nodes must contain its root.

Code
  glycan_structure(wrong_component)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `validate_floating_graph_shape()`:
  ! Floating part node metadata does not match its graph component.
  x Floating part 1 must contain exactly node 2.

explicit parents reject definitely occupied acceptor slots

Code
  glycan_structure(graph)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `floating_attachment_domain()`:
  ! Floating part has impossible explicit parent metadata.
  x Floating part 1 cannot use explicit parent node 1 because every acceptor position declared by linkage "a2-3" is already occupied.

floating parts require a simultaneous attachment assignment

Code
  glycan_structure(conflict)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `validate_floating_metadata_assignments()`:
  ! Floating parts cannot be attached simultaneously.
  x No conflict-free acyclic assignment connects every floating component to the main tree.

floating component cycles require an acyclic alternative

Code
  as_glycan_structure("{Fuc(a1-2)|2}{Man(a1-3)|1}Glc(a1-")
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `validate_floating_metadata_assignments()`:
  ! Floating parts cannot be attached simultaneously.
  x No conflict-free acyclic assignment connects every floating component to the main tree.

ambiguous main edges participate in slot matching

Code
  glycan_structure(conflict)
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `validate_floating_metadata_assignments()`:
  ! Floating parts cannot be attached simultaneously.
  x No conflict-free acyclic assignment connects every floating component to the main tree.