Enum PreviewError 

pub enum PreviewError {
    CrossGuild,
    Cache,
    Nsfw,
    Permission,
    SerenityError(Box<Error>),
}

Errors that can occur when generating a Discord message preview.

Variants

CrossGuild

The link points into a guild other than the one it was posted in.

Cache

Failed to retrieve channel information from cache.

Nsfw

The target channel is marked as NSFW.

Permission

The target channel is private or a private thread.

SerenityError(Box<Error>)

An error occurred while communicating with Discord.

Implementations

impl PreviewError

pub fn is_policy_rejection(&self) -> bool

Whether this is the visibility policy working as designed rather than a failure.

Rejections happen during normal use, so callers log them at debug and keep error for cases that need attention.

Trait Implementations

impl Debug for PreviewError

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

Formats the value using the given formatter.

impl Display for PreviewError

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

Formats the value using the given formatter.

impl Error for PreviewError

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<Box<Error>> for PreviewError

fn from(source: Box<Error>) -> Self

Converts to this type from the input type.

impl From<PreviewError> for ExpandError

fn from(source: PreviewError) -> Self

Converts to this type from the input type.