alditol.md
In glyrepr: Representation for Glycan Compositions and Structures

alditol graph attributes are validated

Code
  validate_glycan_graph(graph)
Condition
  Error in `validate_glycan_graph()`:
  ! Glycan structure graph attribute alditol must be one non-missing logical value.

Code
  validate_glycan_graph(graph)
Condition
  Error in `validate_glycan_graph()`:
  ! Glycan structure graph attribute alditol must be one non-missing logical value.

Code
  validate_glycan_graph(graph)
Condition
  Error in `validate_glycan_graph()`:
  ! Glycan structure graph attribute alditol must be one non-missing logical value.

alditol markers are restricted to the main reducing end

Code
  as_glycan_structure("Gal-ol(b1-4)Glc(a1-")
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `value[[3L]]()`:
  ! Could not parse IUPAC-condensed string: "Gal-ol(b1-4)Glc(a1-"
  i The alditol marker "-ol" is only allowed on the main reducing-end residue.

Code
  as_glycan_structure("Glc-ol-ol(a1-")
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `value[[3L]]()`:
  ! Could not parse IUPAC-condensed string: "Glc-ol-ol(a1-"
  i The alditol marker "-ol" is only allowed on the main reducing-end residue.

Code
  as_glycan_structure("{Gal-ol(b1-4)|2}Glc(a1-")
Condition
  Error in `purrr::map()`:
  i In index: 1.
  Caused by error in `purrr::map()`:
  i In index: 1.
  Caused by error in `.f()`:
  ! A floating glycan part cannot contain an alditol reducing end.