Enum CliError 

pub enum CliError {
    CommandNotFound,
    InvalidPath,
    InvalidArgumentCount {
        expected_min: usize,
        expected_max: usize,
        received: usize,
    },
    InvalidArgumentFormat {
        arg_index: usize,
        expected: String<32>,
    },
    BufferFull,
    PathTooDeep,
    IoError,
    Timeout,
    CommandFailed(String<128>),
    Other(String<128>),
}

CLI error type.

Represents all possible error conditions during command processing. Error messages are designed to be user-friendly while maintaining security (e.g., InvalidPath for both non-existent and inaccessible paths).

Variants

CommandNotFound

Command not found in tree

InvalidPath

Path doesn’t exist OR user lacks access (intentionally ambiguous for security)

SECURITY: Never reveal whether path exists vs. access denied

InvalidArgumentCount

Wrong number of arguments

Fields

expected_min: usize

Minimum expected arguments

expected_max: usize

Maximum expected arguments

received: usize

Number of arguments received

InvalidArgumentFormat

Invalid argument format/type (e.g., expected integer, got string)

Fields

arg_index: usize

Which argument (0-indexed)

expected: String<32>

What was expected (e.g., “integer”, “IP address”)

BufferFull

Buffer capacity exceeded

PathTooDeep

Path exceeds MAX_PATH_DEPTH

IoError

I/O error occurred

Timeout

Operation timed out

CommandFailed(String<128>)

Command executed but reported failure

Other(String<128>)

Generic error with message

Trait Implementations

impl Clone for CliError

fn clone(&self) -> CliError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CliError

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

Formats the value using the given formatter.

impl Display for CliError

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

Formats the value using the given formatter.

impl PartialEq for CliError

fn eq(&self, other: &CliError) -> 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 Eq for CliError

impl StructuralPartialEq for CliError