Enum FormatError 

#[non_exhaustive]
pub enum FormatError {
    InsufficientParameters,
    InvalidFormatString,
    UnsupportedFormatType,
    ExpectedUsize,
    WriteFailed,
}

Error returned by Format::try_format.

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.

InsufficientParameters

A placeholder index is beyond the number of supplied arguments.

InvalidFormatString

The template is syntactically invalid (unbalanced braces, named arguments, an illegal spec, …).

UnsupportedFormatType

The argument does not support the requested format type (e.g. {:x} on a string, or the unsupported {:p}).

ExpectedUsize

The argument referenced by {:1$} / {:.1$} as a width/precision is not an unsigned integer.

WriteFailed

The output sink rejected a write (fmt::Write::write_str returned Err). Writing into a String never fails.

Trait Implementations

impl Clone for FormatError

fn clone(&self) -> FormatError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FormatError

impl Debug for FormatError

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

Formats the value using the given formatter.

impl Display for FormatError

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

Formats the value using the given formatter.

impl Eq for FormatError

impl Error for FormatError

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 Hash for FormatError

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for FormatError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FormatError