Struct StepArgsError 

pub struct StepArgsError { /* private fields */ }

Error returned when converting captured placeholder strings into a struct annotated with #[derive(StepArgs)] fails.

Implementations

impl StepArgsError

pub fn new(message: impl Into<String>) -> Self

Construct a new error with the provided message.

pub fn parse_failure(field: &'static str, raw: &str) -> Self

Build an error describing a failed parse for field using raw.

pub fn count_mismatch(expected: usize, actual: usize) -> Self

Build an error describing a mismatch between expected and actual counts.

The derive macro validates capture counts at compile time, but the constructor remains available for manual implementations.

pub fn message(&self) -> &str

Access the underlying error message.

Trait Implementations

impl Clone for StepArgsError

fn clone(&self) -> StepArgsError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StepArgsError

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

Formats the value using the given formatter.

impl Display for StepArgsError

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

Formats the value using the given formatter.

impl Error for StepArgsError

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 StepArgsError

fn eq(&self, other: &StepArgsError) -> 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 Eq for StepArgsError

impl StructuralPartialEq for StepArgsError