Enum TypeMismatchError 

pub enum TypeMismatchError {
    NullPointer,
    InvalidTypeId,
    Mismatch {
        expected: &'static str,
        found: &'static str,
    },
}

Error returned when type checking fails in try_from_sexp_with_error.

The found field in Mismatch contains a &'static str from R’s interned symbol table, which persists for the R session lifetime.

Variants

NullPointer

The external pointer’s address was null.

InvalidTypeId

The prot slot didn’t contain a valid type symbol.

Mismatch

The stored type doesn’t match the expected type.

Fields

expected: &'static str

Expected Rust type name from this pointer wrapper.

found: &'static str

Actual stored Rust type name found in pointer metadata.

Trait Implementations

impl Clone for TypeMismatchError

fn clone(&self) -> TypeMismatchError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TypeMismatchError

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

Formats the value using the given formatter.

impl Display for TypeMismatchError

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

Formats the value using the given formatter.

impl Error for TypeMismatchError

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

Returns the lower-level source of this error, if any.

#[doc(hidden)]

fn type_id(&self, _: Internal) -> TypeId

where Self: 'static,

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

Gets the TypeId of self.

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.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 40 bytes

Size for each variant:

• NullPointer: 0 bytes
• InvalidTypeId: 0 bytes
• Mismatch: 32 bytes