Enum TopologyError 

pub enum TopologyError {
    DuplicateNode {
        name: String,
    },
    InvalidNodeName {
        name: String,
        reason: String,
    },
    NoEntryPoint,
    NodeNotFound {
        name: String,
    },
    EdgeTargetNotFound {
        from: String,
        branch: String,
        target: String,
    },
    IsolatedNode {
        name: String,
    },
    UnreachableNode {
        name: String,
    },
    PotentialInfiniteLoop {
        cycle: Vec<String>,
    },
    InvalidFieldReference {
        index: usize,
        field_count: usize,
        field_names: &'static [&'static str],
        context: String,
    },
}

Topology validation errors

These errors indicate structural problems with a graph that would prevent correct execution.

Variants

DuplicateNode

Fields

name: String

InvalidNodeName

Fields

name: String

reason: String

NoEntryPoint

NodeNotFound

Fields

name: String

EdgeTargetNotFound

Fields

from: String

branch: String

target: String

IsolatedNode

Fields

name: String

UnreachableNode

Fields

name: String

PotentialInfiniteLoop

Fields

cycle: Vec<String>

InvalidFieldReference

Fields

index: usize

field_count: usize

field_names: &'static [&'static str]

context: String

Trait Implementations

impl Debug for TopologyError

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

Formats the value using the given formatter.

impl Display for TopologyError

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

Formats the value using the given formatter.

impl Error for TopologyError

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.