Enum DataFrameError 

pub enum DataFrameError {
    NotList(String),
    NotDataFrame,
    NoNames,
    BadRowNames(String),
    UnequalLengths {
        expected: usize,
        column: String,
        actual: usize,
    },
    UnnamedColumns,
    NoSuchColumn(String),
    UnsupportedGroupColumn {
        column: String,
        type_of: String,
    },
    Conversion(String),
}

Error returned by any DataFrame construction, read, or conversion path.

This is the single data-frame error contract: the row-buffer build path, the serde columnar path, the parallel R→Rust reader, and validation all surface a DataFrameError.

Variants

NotList(String)

The SEXP is not a VECSXP.

NotDataFrame

The object does not inherit from data.frame.

NoNames

The list has no names attribute (columns must be named).

BadRowNames(String)

Could not extract nrow from row.names attribute.

UnequalLengths

Columns have unequal lengths (when promoting from NamedList).

Fields

expected: usize

First column length encountered.

column: String

The column name that differs.

actual: usize

The actual length of that column.

UnnamedColumns

A row could not be turned into named columns (e.g. unnamed list elements in a IntoList-derived row). Replaces the old panic! on this path.

NoSuchColumn(String)

DataFrame::group_by referenced a column name that does not exist.

UnsupportedGroupColumn

DataFrame::group_by on a column type with no sane grouping semantics (doubles, list-columns, …).

Fields

column: String

The offending column name.

type_of: String

Its SEXPTYPE, rendered for the message.

Conversion(String)

A serde-driven schema/serialize/deserialize failure (the bridged RSerdeError text) or another conversion failure carried as a message.

Trait Implementations

impl Clone for DataFrameError

fn clone(&self) -> DataFrameError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataFrameError

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

Formats the value using the given formatter.

impl Display for DataFrameError

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

Formats the value using the given formatter.

impl Error for DataFrameError

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: 48 bytes

Size for each variant:

• NotList: 32 bytes
• NotDataFrame: 0 bytes
• NoNames: 0 bytes
• BadRowNames: 32 bytes
• UnequalLengths: 48 bytes
• UnnamedColumns: 0 bytes
• NoSuchColumn: 32 bytes
• UnsupportedGroupColumn: 48 bytes
• Conversion: 32 bytes