Struct ShaderWatcher 

pub struct ShaderWatcher {
    pub watch_paths: Vec<String>,
    pub poll_interval_ms: u64,
    pub sources: HashMap<String, ShaderSource>,
    /* private fields */
}

Watches a collection of named WGSL shader sources for changes.

In a no-filesystem context (embedded, WASM, tests) changes are driven explicitly by calling ShaderWatcher::update_source. On native targets an optional polling loop can check file modification times (see ShaderWatcher::poll_changes).

Fields

watch_paths: Vec<String>

Filesystem paths added via Self::add_path; stored for future polling.

poll_interval_ms: u64

Polling interval hint in milliseconds (informational only).

sources: HashMap<String, ShaderSource>

All tracked sources keyed by label.

Implementations

impl ShaderWatcher

pub fn new(poll_interval_ms: u64) -> Self

Create a new watcher with the given poll interval.

pub fn add_path(&mut self, path: impl Into<String>)

Register a filesystem path to watch.

The label used for the source will be the path string itself. The file is not loaded immediately; call Self::update_source with its content or rely on a future polling implementation.

pub fn add_inline(&mut self, label: impl Into<String>, wgsl: impl Into<String>)

Register an inline WGSL source by label. If a source with the same label already exists it is replaced (version resets to 1).

pub fn poll_changes(&mut self) -> Vec<ShaderChangeEvent>

Check whether any tracked sources have changed since the last call to poll_changes.

In the current implementation changes are detected purely by comparing in-memory version numbers; actual filesystem polling is not yet wired up. Returns the list of ShaderChangeEvents describing what changed.

pub fn update_source( &mut self, label: &str, new_wgsl: impl Into<String>, ) -> bool

Force-update the WGSL source for an existing label, bumping its version. Returns true on success, false if the label is unknown.

pub fn get_source(&self, label: &str) -> Option<&ShaderSource>

Look up a source by label.

pub fn source_version(&self, label: &str) -> Option<u64>

Return the current version of a source, or None if the label is not registered.