Enum oc_wasm_safe::error::Error

pub enum Error {
    CborDecode,
    BufferTooShort,
    NoSuchComponent,
    NoSuchMethod,
    BadParameters,
    QueueFull,
    QueueEmpty,
    BadDescriptor,
    TooManyDescriptors,
    Other,
    Unknown,
}

The errors that a system call can return.

Variants

CborDecode

BufferTooShort

NoSuchComponent

NoSuchMethod

BadParameters

QueueFull

QueueEmpty

BadDescriptor

TooManyDescriptors

Other

Unknown

Implementations

impl Error

pub fn as_str(self) -> &'static str

Returns a string describing the error.

impl Error

pub fn from_isize(value: isize) -> Result<usize>

Checks a system call return value of type isize for an error value.

Returns a Result containing an Error if the value is negative, or the original value if it was nonnegative.

Errors

This function fails if the parameter is negative, decoding the represented error code.

Panics

This function panics if the syscall error code is MemoryFault or StringDecode. These syscall errors should be impossible in safe code because the type system prohibits them: MemoryFault should be impossible because all memory regions are taken as slices which are always valid, and StringDecode should be impossible because all strings are taken as string-slices (&str) which are always valid UTF-8.

pub fn from_i32(value: i32) -> Result<u32>

Checks a system call return value of type i32 for an error value.

Returns a Result containing an Error if the value is negative, or the original value if it was nonnegative.

Errors

This function fails if the parameter is negative, decoding the represented error code.

Panics

This function panics if the syscall error code is MemoryFault or StringDecode. These syscall errors should be impossible in safe code because the type system prohibits them: MemoryFault should be impossible because all memory regions are taken as slices which are always valid, and StringDecode should be impossible because all strings are taken as string-slices (&str) which are always valid UTF-8.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a copy 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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

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

impl Hash for Error

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<Error> for Error

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Copy for Error

impl Eq for Error

impl StructuralEq for Error

impl StructuralPartialEq for Error