Enum UnrollError 

pub enum UnrollError {
    ArgMissing {
        placeholder: usize,
        args_len: usize,
    },
    InvalidType {
        placeholder_ty: &'static str,
        arg_ty: &'static str,
    },
    UnexpectedLength {
        expected_len: usize,
        args_len: usize,
    },
    UnexpectedIndexes {
        expected_len: usize,
        args_len: usize,
    },
    UnknownIdentifier(String),
}

Error type returned when instantiating a Group or Slide fails.

Variants

ArgMissing

Missing argument value

Fields

placeholder: usize

The index of the missing argument.

args_len: usize

The number of arguments provided.

InvalidType

Invalid type for argument

Fields

placeholder_ty: &'static str

Type deduced by the position of the placeholder.

arg_ty: &'static str

Type of the argument expression provided.

UnexpectedLength

Unexpected number of expressions

Fields

expected_len: usize

The expected number of expressions

args_len: usize

The number of expressions that unrolling evaluated to.

UnexpectedIndexes

Unexpected number of indexes in array access

Fields

expected_len: usize

The expected number of indexing operations

args_len: usize

The number of indexing operations found.

UnknownIdentifier(String)

Unknown identifier

Trait Implementations

impl Clone for UnrollError

fn clone(&self) -> UnrollError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UnrollError

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

Formats the value using the given formatter.

impl Display for UnrollError

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

Formats the value using the given formatter.

impl Error for UnrollError

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.