Enum Error 

#[non_exhaustive]
pub enum Error {
    Decode(DecodeError),
    NoUserMemory(Model),
    NoCommandLine(Model),
    NotSetUp {
        home: u32,
    },
    Unreadable(u32),
    Memory(String),
    Parse(String),
    Invalid(String),
    Context {
        context: String,
        source: Box<Error>,
    },
}

What went wrong outside the decoder, or a DecodeError on the way.

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.

Decode(DecodeError)

Nibbles that are not an object.

NoUserMemory(Model)

The model keeps no RPL user memory this crate reads (the aplet models, the Pioneers, the 28S, the 19BII).

NoCommandLine(Model)

The model has no RPL command line this crate reads, or (the 28S) none whose screens it follows.

NotSetUp

HOME (at this address) is no directory: the ROM has not set up its memory yet (not booted, or reset and not idle since).

Fields

home: u32

Where the HOME pointer points.

Unreadable(u32)

The memory at this address cannot be read.

Memory(String)

Memory that is not as the ROM leaves it (implausible pointers, no stack end marker, a command line too long), as a message.

Parse(String)

Text that is no number of the kind asked for, or a number out of the calculator’s range, as a message.

Invalid(String)

An object or value the operation cannot take (one with no text form, a name too long to encode, a picture of the wrong size), as a message.

Context

source in the step described by context (stack level 2).

Fields

context: String

What was being done.

source: Box<Error>

What failed.

Implementations

impl Error

pub fn context(self, context: impl Into<String>) -> Self

self in the step context.

pub fn root(&self) -> &Error

The innermost error, under every Error::Context: match it for the case (Error::NotSetUp, Error::Decode, …).

pub fn is_not_set_up(&self) -> bool

Whether the ROM has not set up its user memory yet.

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 Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

The message; with {:#} followed by those of every source, joined with : (as anyhow shows a chain).

impl Eq for Error

impl Error for Error

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<DecodeError> for Error

fn from(e: DecodeError) -> Self

Converts to this type from the input type.

impl PartialEq for Error

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Error