Enum CreationOrder 

pub enum CreationOrder {
    Untracked,
    Tracked,
    Indexed,
}

The creation-order policy of one collection — a group’s links, or an object’s attributes.

Both property-list setters accept exactly three values: nothing, H5P_CRT_ORDER_TRACKED, or H5P_CRT_ORDER_TRACKED | H5P_CRT_ORDER_INDEXED. INDEXED on its own is rejected (H5Pset_link_creation_order, H5Pset_attr_creation_order), which is why this is one enum rather than two booleans: the fourth combination cannot be constructed.

Variants

Untracked

No creation order is recorded. Members carry the “no creation index” sentinel and the object declares neither flag.

Tracked

Every member carries its creation index and the object declares a running maximum, but no creation-order B-tree exists.

Indexed

Tracked, plus a v2 B-tree indexing the members by creation order.

Implementations

impl CreationOrder

pub fn is_tracked(self) -> bool

Whether members carry a creation index — the TRACKED flag bit.

pub fn is_indexed(self) -> bool

Whether a creation-order index exists — the INDEXED flag bit.

pub fn from_flags(tracked: bool, indexed: bool) -> Self

Recover the policy from the two on-disk flag bits.

A lone indexed bit is read as Untracked: the library refuses to set it, and an index over records that carry no creation index cannot be walked in creation order anyway.

Trait Implementations

impl Clone for CreationOrder

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for CreationOrder

impl Debug for CreationOrder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CreationOrder

fn default() -> Self

Returns the “default value” for a type.

impl Eq for CreationOrder

impl PartialEq for CreationOrder

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CreationOrder