Enum FormatError

#[non_exhaustive]
pub enum FormatError {
    UnterminatedSpecifier {
        pattern: String,
    },
    UnacceptableSpecifier {
        spec: String,
        scheme_name: &'static str,
    },
    SpecifiersMustStepDecrease {
        prev: String,
        next: String,
    },
    WrongFirstSpecifier {
        first_spec: String,
        scheme_name: &'static str,
        expected_first: String,
    },
    Incomplete {
        last_spec: String,
        scheme_name: &'static str,
        expected_last: String,
    },
    NoSpecifiersInFormat,
}

An error that occurred while parsing a format string.

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.

UnterminatedSpecifier

The specifier is not terminated with a closing bracket.

Fields

pattern: String

The unterminated specifier string

UnacceptableSpecifier

The specifier is not a valid specifier for the scheme

Fields

spec: String

The specifier

scheme_name: &'static str

The scheme name

SpecifiersMustStepDecrease

Two adjacent specifiers were not decreasing or decreased by more than one “step”. In other words, the specifiers are not in the correct order of significance.

Examples

• <MAJOR><MAJOR>: not decreasing
• <MAJOR><MINOR><PATCH><MINOR>: last minor does not decrease
• <YYYY><DD>: decreasing by more than one step (days are only relative to months)

Fields

prev: String

The first specifier

next: String

The second specifier

WrongFirstSpecifier

The first specifier in a format is not allowed to be there

Fields

first_spec: String

The specifier

scheme_name: &'static str

The scheme name

expected_first: String

A (possibly comma-separated) list of expected specifiers

Incomplete

The last specifier in a format does not complete the format

Fields

last_spec: String

The last specifier

scheme_name: &'static str

The scheme name

expected_last: String

A (possibly comma-separated) list of expected specifiers

NoSpecifiersInFormat

The format string should contain at least one specifier

Trait Implementations

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, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

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 From<FormatError> for CompositeError

fn from(source: FormatError) -> Self

Converts to this type from the input type.

impl PartialEq for FormatError

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