Enum DTypeParseError 

pub enum DTypeParseError {
    Unknown(String),
    Reserved(String),
}

Error returned when a string cannot be parsed as a DType.

Why this distinguishes two rejections

f8e5m2fnuz is a real, specified layout this schema version declines to compute on; asdf is not a dtype at all. Those are different facts about the world, and they imply different actions — wait for a schema bump vs fix your input. Collapsing them tells a caller “no” without telling it which no.

The distinction is a VARIANT, not a message. A differing Display string is prose a caller cannot act on; the obligation is to a caller of this API, so it has to be matchable.

For what this does and does not discharge — in particular that it is NOT KISS-CLASSIFY §6.1-0001 conformance, because that clause binds a reader of a structure_key and Fuel has none — and for the scheduled external expiry this decline carries, see RESERVED_DTYPE_TOKENS.

Variants

Unknown(String)

Not a §6.1 dtype token at all.

Reserved(String)

A §6.1 token that is reserved at this schema version: recognized, deliberately not computed on.

Implementations

impl DTypeParseError

pub fn token(&self) -> &str

The offending token, whichever rejection this is.

pub fn is_reserved(&self) -> bool

Was this a recognized-but-reserved spelling?

Trait Implementations

impl Debug for DTypeParseError

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

Formats the value using the given formatter.

impl Display for DTypeParseError

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

Formats the value using the given formatter.

impl Eq for DTypeParseError

impl Error for DTypeParseError

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.

impl PartialEq for DTypeParseError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DTypeParseError