Enum ParseModeError 

pub enum ParseModeError {
    Unknown(String),
    Malformed(String),
}

Error returned when a string is not a recognised ReadMode.

Variants

Unknown(String)

The string is not any known mode keyword or prefix.

Malformed(String)

A known prefix (lines: / density:) with an unparseable payload.

Implementations

impl ParseModeError

pub fn user_message(&self) -> String

Actionable, caller-facing message for a rejected mode string (#1209).

Display states what is wrong; this also says what to type instead — critical for the lines:N:M colon-typo trap, where a second colon reads natural (muscle memory from file:line:col) but is malformed. Without this the range failed silently: a small file returned an empty window (“No lines matched”), a large one bounced to a full-file dump.

Trait Implementations

impl Clone for ParseModeError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseModeError

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

Formats the value using the given formatter.

impl Display for ParseModeError

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

Formats the value using the given formatter.

impl Eq for ParseModeError

impl Error for ParseModeError

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 ParseModeError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ParseModeError