Enum Error 

#[non_exhaustive]
pub enum Error {
    PluginNotFound(String),
    PluginLoadFailed(String),
    PluginCrashed,
    PluginTimeout,
    InvalidParameter(String),
    AudioBackendError(String),
    MidiError(String),
    InterfaceError(String),
    ProcessError(String),
    IoError(Error),
    ProcessFailed(i32),
    NotProcessing,
    Other(String),
}

Main error type for vst3-host operations.

Marked #[non_exhaustive]: match with a wildcard arm, as new variants may be added in future versions without it being a breaking change.

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.

PluginNotFound(String)

Plugin file not found

PluginLoadFailed(String)

Failed to load plugin

PluginCrashed

Plugin crashed during operation

PluginTimeout

Plugin operation timed out

InvalidParameter(String)

Invalid parameter

AudioBackendError(String)

Audio backend error

MidiError(String)

MIDI error

InterfaceError(String)

COM/VST3 interface error

ProcessError(String)

Process isolation error

IoError(Error)

IO error

ProcessFailed(i32)

The plugin’s process() returned a failure code. Carries the raw tresult rather than a formatted String so returning it from the audio callback allocates nothing.

NotProcessing

The plugin is not currently active/processing. A unit variant for the same reason as Self::ProcessFailed — this is rejected on the audio path once per block while stopped.

Other(String)

Other errors

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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 From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.