Enum ParamError 

pub enum ParamError {
    NoActivePreset,
    UnknownParam(String),
}

Why a live parameter override was refused.

Both arms are load-time answers to a question asked over the control surface, so the sender learns immediately that a name will never move — rather than sending at slider rate into a value nothing reads. OSC itself has no reply channel (ADR-0164), which is why this is a Result here and a counter at the listener.

Variants

NoActivePreset

The roster is empty, so there is no system whose vocabulary could claim any name at all.

UnknownParam(String)

No backdrop, post stage, terminal pass or scene on the active preset’s system answers to this name — the same verdict ParamRoute::Unclaimed records for a binding, taken at the moment the override is set instead of silently at apply time.

Trait Implementations

impl Clone for ParamError

fn clone(&self) -> ParamError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParamError

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

Formats the value using the given formatter.

impl Display for ParamError

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

Formats the value using the given formatter.

impl Error for ParamError

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.

impl PartialEq for ParamError

fn eq(&self, other: &ParamError) -> 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 Eq for ParamError

impl StructuralPartialEq for ParamError