Enum Error 

#[non_exhaustive]
pub enum Error {
    Empty,
    Invalid(usize),
    Incomplete,
    Ambiguous(usize),
}

why a line does not parse

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.

Empty

nothing was typed

Invalid(usize)

no command goes on at this byte of the line (the “^” marker)

Incomplete

the line ends before the command does

Ambiguous(usize)

the word at this byte fits several commands

Implementations

impl Error

pub fn render(&self, col: usize, line: &str) -> String

the console text; col is where the line starts on the screen (the prompt’s length), so the marker stands under the bad character

Trait Implementations

impl Clone for Error

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Error

impl Debug for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error