Enum DraftError 

pub enum DraftError {
    DuplicateVariable {
        name: String,
    },
    DuplicateStep {
        name: String,
    },
    DuplicateReturn {
        name: String,
    },
    UnresolvedReference {
        step: String,
        reference: String,
    },
    UnresolvedReturn {
        returns: String,
        reference: String,
    },
    InvalidMetadata {
        operation: &'static str,
        reason: String,
    },
    MissingExtension {
        step: String,
        operation: &'static str,
        extension: String,
    },
}

Errors produced while building or compiling a draft pipeline.

DraftError is returned by construction methods on Pipeline<Draft> and by Pipeline::compile. Callers should match on the variants when they want to surface specific failures (duplicate names, unresolved references) with custom diagnostics — for example when a loader is translating external configuration into a pipeline.

Variants

DuplicateVariable

A Pipeline::var call used a name already bound to another variable.

Fields

name: String

The conflicting variable name.

DuplicateStep

A Pipeline::step call used a name already bound to another step.

Fields

name: String

The conflicting step name.

DuplicateReturn

A Pipeline::returns call used a name already bound to another return block.

Fields

name: String

The conflicting return-block name.

UnresolvedReference

Compile-time simulation found a step parameter referencing a store entry that is not produced by any preceding step.

Fields

step: String

The step whose parameters contained the bad reference.

reference: String

The dotted store path that failed to resolve.

UnresolvedReturn

Compile-time simulation found a return-block parameter referencing a store entry that is not available at the end of the pipeline.

Fields

returns: String

The return block whose parameters contained the bad reference.

reference: String

The dotted store path that failed to resolve.

InvalidMetadata

Operation metadata failed validation when the operation was registered — typically a NameSpec::DerivedFrom referencing a missing input or an input of the wrong type.

Fields

operation: &'static str

The operation whose metadata failed validation.

reason: String

Human-readable explanation of the failure.

MissingExtension

A step declared an extension requirement that is not registered on the pipeline.

Fields

step: String

The step whose operation requires the extension.

operation: &'static str

The operation name from its metadata.

extension: String

The extension name that should be registered via Pipeline::extension.

Trait Implementations

impl Debug for DraftError

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

Formats the value using the given formatter.

impl Display for DraftError

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

Formats the value using the given formatter.

impl Error for DraftError

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 DraftError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for DraftError