Struct SiteDeps 

pub struct SiteDeps {
    pub path: String,
    pub kind: SiteKind,
    pub dynamic: bool,
    pub reads: BTreeSet<Symbol>,
    pub prop_reads: BTreeSet<Symbol>,
}

One addressable place in a view that can change, and what it depends on.

Fields

path: String

Dotted child indices from the view root — the patcher’s address for the node.

kind: SiteKind

dynamic: bool

Does this site live under an {if}, a {for each} or an {inspect}?

A site under control flow has no single node: a loop body renders once PER ITEM, and an arm renders only while its condition holds. Its static path therefore names a shape rather than a node, so an in-place patch cannot address it and the update falls back to rebuilding. Marked here, where the walk already knows, rather than re-derived from the path string — a path is not a reliable record of how it was produced.

reads: BTreeSet<Symbol>

State fields, already closed over derived fields and template bindings.

prop_reads: BTreeSet<Symbol>

Props read here. Separate because a prop cannot change without the PARENT re-rendering this component, so it is not something this instance’s own turns can invalidate.

Implementations

impl SiteDeps

pub fn key(&self, interner: &Interner) -> String

kind@path — the site’s identity, and the KEY a renderer records its node under.

The dependency walk and the render walk are two walks over one tree, and two walks drift. Making them agree on a STRING means the agreement can be asserted directly rather than hoped for: a renderer that numbered a child differently records a key the graph never names, and the lock says so.

pub fn patchable(&self) -> bool

Can a turn update this site IN PLACE, without rebuilding anything?

Only a value-shaped site under no control flow: it names exactly one node that exists for as long as the component is mounted. An {if} or a {for each} MOUNTS and UNMOUNTS subtrees, which is a different operation from writing a value into a node that is already there.

Trait Implementations

impl Clone for SiteDeps

fn clone(&self) -> SiteDeps

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SiteDeps

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

Formats the value using the given formatter.