Enum Error 

#[non_exhaustive]
pub enum Error {
    UnknownNode {
        link: usize,
        node: String,
    },
    SelfLink {
        link: usize,
        node: String,
    },
    PortInUse {
        node: String,
        port: String,
    },
    TooManyLinks(usize),
    UnknownLan {
        node: String,
        lan: String,
    },
    ReservedLanName(String),
    BadCidr {
        lan: String,
        cidr: String,
    },
    AddressTaken {
        lan: String,
        octet: u8,
        first: String,
        second: String,
    },
    LanFull {
        lan: String,
        cidr: String,
    },
    SwitchNameTaken {
        switch: String,
    },
    PortName {
        node: String,
        port: u16,
        source: Error,
    },
    Yaml(Error),
    Unreadable(Problems),
}

Why a drawing doesn’t compile.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnknownNode

A cable names a node the lab doesn’t have.

Fields

link: usize

The cable’s index.

node: String

The node it names.

SelfLink

A cable runs from a node to itself.

Fields

link: usize

The cable’s index.

node: String

The node.

PortInUse

Two cables share a port.

Fields

node: String

The node.

port: String

Its port.

TooManyLinks(usize)

More cables than the cables’ block holds.

UnknownLan

A node is on a LAN the lab doesn’t have.

Fields

node: String

The node.

lan: String

The LAN it names.

ReservedLanName(String)

A LAN’s name is one the cables use (link-<n>).

BadCidr

A LAN’s CIDR isn’t a.b.c.d/n.

Fields

lan: String

The LAN.

cidr: String

Its block as drawn.

AddressTaken

Two nodes ask for the same address on a LAN.

Fields

lan: String

The LAN.

octet: u8

The address’s last octet.

first: String

The node that asked first.

second: String

The other one.

LanFull

A LAN has more machines than free addresses.

Fields

lan: String

The LAN.

cidr: String

Its block.

SwitchNameTaken

A switch has the name of a LAN: its VLANs nest under a LAN of that name in the spec.

Fields

switch: String

The switch.

PortName

A port name the compiler made breaks Isoloom’s rule (a bug: the names are generated).

Fields

node: String

The node.

port: u16

The port.

source: Error

Why the name was refused.

Yaml(Error)

The spec couldn’t be written as YAML.

Unreadable(Problems)

Isoloom doesn’t read the spec the compiler wrote (a bug: the compiler writes only what Isoloom’s format holds).

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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.