Struct Lv2StatePatch 

pub struct Lv2StatePatch { /* private fields */ }

A portable snapshot of one LV2 plugin’s state, keyed by its URI.

Pairs a plugin URI with a PluginState and round-trips through the shared Expr graph via Lv2StatePatch::to_expr and Lv2StatePatch::from_expr.

Implementations

impl Lv2StatePatch

pub fn new(plugin_uri: impl Into<String>, state: PluginState) -> Result<Self>

Builds a state patch for plugin_uri carrying state.

Errors

Returns Error::Eval when plugin_uri is blank.

pub fn plugin_uri(&self) -> &str

Returns the plugin URI this patch applies to.

pub fn state(&self) -> &PluginState

Returns the captured plugin state.

pub fn to_expr(&self) -> Expr

Encodes this patch as a tagged Expr::Map in the plugin-lv2 namespace.

pub fn from_expr(expr: &Expr) -> Result<Self>

Decodes a patch from an Expr emitted by Lv2StatePatch::to_expr.

Errors

Returns Error::Eval when expr is not a map, its tag is missing or wrong, or the uri/state fields are absent or ill-typed.

Trait Implementations

impl Clone for Lv2StatePatch

fn clone(&self) -> Lv2StatePatch

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Lv2StatePatch

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

Formats the value using the given formatter.

impl PartialEq for Lv2StatePatch

fn eq(&self, other: &Lv2StatePatch) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Lv2StatePatch