Struct concordium_std::ParseError

pub struct ParseError {}

Zero-sized type to represent an error when reading bytes and deserializing.

When using custom error types in your smart contract, it is convenient to implement the trait From<ParseError> for you custom error type, to allow using the ? operator when deserializing bytes, such as the contract state or parameters.

enum MyCustomReceiveError {
    Parsing
}

impl From<ParseError> for MyCustomReceiveError {
    fn from(_: ParseError) -> Self { MyCustomReceiveError::Parsing }
}

#[receive(contract = "mycontract", name="some_receive_name", mutable)]
fn contract_receive<S: HasStateApi>(
    ctx: &impl HasReceiveContext,
    host: &mut impl HasHost<State, StateApiType = S>,
) -> Result<A, MyCustomReceiveError> {
    // ...
    let msg: MyParameterType = ctx.parameter_cursor().get()?;
    // ...
}

Trait Implementations

impl Debug for ParseError

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

Formats the value using the given formatter.

impl Default for ParseError

fn default() -> ParseError

Returns the “default value” for a type.

impl Display for ParseError

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

Formats the value using the given formatter.

impl Error for ParseError

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

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<ParseError> for Reject

Mapped to i32::MIN + 2.

fn from(_: ParseError) -> Self

Converts to this type from the input type.

impl From<TestStateError> for ParseError

fn from(_: TestStateError) -> Self

Converts to this type from the input type.

impl From<TryFromIntError> for ParseError

fn from(_: TryFromIntError) -> ParseError

Converts to this type from the input type.

impl PartialEq for ParseError

fn eq(&self, other: &ParseError) -> 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 !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ParseError

impl StructuralPartialEq for ParseError