Enum TreeError 

#[non_exhaustive]
pub enum TreeError {
    RootNotSet,
    RootAlreadySet,
    RootMissing(NodeId),
    PanelIdExhausted,
    ArenaOverflow,
    ArenaIndexOverflow,
    MissingChild {
        parent: NodeId,
        child: NodeId,
    },
    NoParentEntry(NodeId),
    ParentMissing {
        parent: NodeId,
        child: NodeId,
    },
    ParentChildMismatch {
        parent: NodeId,
        child: NodeId,
    },
    NoKinds,
    ActiveOutOfBounds {
        active: usize,
        len: usize,
    },
    DashboardNoCards,
    DashboardNoColumns,
    WindowSizeZero,
    EmptyAfterRebuild,
    NoRoot,
    ColumnsCountZero,
    Dynamic(Box<str>),
}

Tree structure validation failure.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

RootNotSet

Root is not set.

RootAlreadySet

Root was already set.

RootMissing(NodeId)

Root node missing from arena.

PanelIdExhausted

Panel ID counter exhausted.

ArenaOverflow

Node arena size exceeds u32 capacity.

ArenaIndexOverflow

Node arena index exceeds u32 capacity.

MissingChild

A container references a missing child.

Fields

parent: NodeId

The parent node.

child: NodeId

The missing child node.

NoParentEntry(NodeId)

A node has no parent entry.

ParentMissing

A node’s parent is missing from the arena.

Fields

parent: NodeId

The missing parent node.

child: NodeId

The child node.

ParentChildMismatch

Parent-child mismatch between parent_map and children list.

Fields

parent: NodeId

The parent node.

child: NodeId

The child node.

NoKinds

At least one kind required.

ActiveOutOfBounds

Active index out of bounds.

Fields

active: usize

The active index.

len: usize

The number of panels.

DashboardNoCards

Dashboard requires at least one card.

DashboardNoColumns

Dashboard columns must be at least 1.

WindowSizeZero

Window size must be at least 1.

EmptyAfterRebuild

Tree empty after rebuild.

NoRoot

No root node.

ColumnsCountZero

Column count must be at least 1.

Dynamic(Box<str>)

Wrapped error from Taffy or other dynamic source.

Trait Implementations

impl Debug for TreeError

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

Formats the value using the given formatter.

impl Display for TreeError

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

Formats the value using the given formatter.

impl Error for TreeError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.