Enum DialogueError 

#[non_exhaustive]
pub enum DialogueError {
    Parse {
        file: String,
        line: usize,
        message: String,
    },
    UnknownNode(String),
    DuplicateNode(String),
    Validation(String),
    ProtocolViolation(String),
    TypeMismatch {
        expected: String,
        got: String,
        context: String,
    },
    UndefinedVariable(String),
    Function {
        name: String,
        message: String,
    },
}

All errors that can be produced by compilation or runtime execution.

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.

Parse

A parse-time error, optionally localised to a source span.

Fields

file: String

Source file name or "<source>".

line: usize

1-based line number.

message: String

Human-readable description.

UnknownNode(String)

A reference to an unknown node.

DuplicateNode(String)

A duplicate node title was found across merged sources.

Validation(String)

A validation failure detected after all sources are merged.

ProtocolViolation(String)

The Runner API was called in the wrong order (e.g. next_event while awaiting an option, or select_option when not awaiting).

Embedders can match on this variant to detect integration bugs without parsing the error message string.

TypeMismatch

A type mismatch in an expression (e.g. adding a number to a string).

expected and got are human-readable descriptions of the involved types; context is the operation that triggered the mismatch.

Fields

expected: String

The type the operation expected.

got: String

The type actually encountered.

context: String

The operation that produced the mismatch (e.g. "+").

UndefinedVariable(String)

An unknown variable was referenced.

Function

A function call failed.

Fields

name: String

Function name.

message: String

Description.

Trait Implementations

impl Clone for DialogueError

fn clone(&self) -> DialogueError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DialogueError

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

Formats the value using the given formatter.

impl Display for DialogueError

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

Formats the value using the given formatter.

impl Error for DialogueError

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.