Enum RuntimeError 

pub enum RuntimeError {
    SourceEval {
        var: String,
        source: String,
        message: String,
    },
    FilterEval {
        predicate: String,
        message: String,
    },
    OrderEval {
        strategy: StrategyName,
        message: String,
    },
    StrategyRejectsInput {
        strategy: StrategyName,
        index_fn: Option<IndexFn>,
    },
    UnsupportedShape(String),
    ZipLengthMismatch {
        lengths: Vec<u64>,
    },
}

Errors the runtime evaluator surfaces.

Variants

SourceEval

Source evaluation failed (interpolation error, eval_const_expr error, unsupported source shape, etc.).

Fields

var: String

The clause’s element name.

source: String

The source text.

message: String

The underlying reason.

FilterEval

Filter predicate evaluation failed.

Fields

predicate: String

The predicate text.

message: String

The underlying reason.

OrderEval

Strategy application failed.

Fields

strategy: StrategyName

The strategy applied.

message: String

The underlying reason.

StrategyRejectsInput

V4 (comprehension_forms.md §5) violation — strategy rejects the input’s addressing shape at invocation time (§10.7.8).

Fields

strategy: StrategyName

The strategy applied.

index_fn: Option<IndexFn>

The input’s addressing scheme, if one was claimed.

UnsupportedShape(String)

A shape the runtime evaluator cannot evaluate: a discrete clause referencing an axis beside a continuous one in a sampled space, a cartesian or union of more than 2^64 tuples, or a source asking for a scope the evaluator did not supply.

ZipLengthMismatch

A strict zip’s operands have different lengths. The traversal evaluators report it at open; a stream reports it when one operand ends before the others, after the tuples before it.

Fields

lengths: Vec<u64>

Each operand’s tuple count, in operand order.

Trait Implementations

impl Clone for RuntimeError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RuntimeError

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

Formats the value using the given formatter.

impl Display for RuntimeError

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

Formats the value using the given formatter.

impl Error for RuntimeError

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.