Struct PlaceholderSyntaxError 

pub struct PlaceholderSyntaxError {
    pub message: String,
    pub position: usize,
    pub placeholder: Option<String>,
}

Detailed information about placeholder parsing failures.

Fields

message: String

Human‑readable reason for the failure.

position: usize

Zero-based byte offset in the original pattern where parsing failed.

placeholder: Option<String>

Name of the placeholder, when known.

Implementations

impl PlaceholderSyntaxError

pub fn new( message: impl Into<String>, position: usize, placeholder: Option<String>, ) -> Self

Construct a new syntax error with optional placeholder context.

pub fn user_message(&self) -> String

Return the user‑facing message without the “invalid placeholder syntax” prefix.

Trait Implementations

impl Clone for PlaceholderSyntaxError

fn clone(&self) -> PlaceholderSyntaxError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PlaceholderSyntaxError

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

Formats the value using the given formatter.

impl Display for PlaceholderSyntaxError

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

Formats the value using the given formatter.

impl Error for PlaceholderSyntaxError

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 From<PlaceholderSyntaxError> for StepPatternError

fn from(err: PlaceholderSyntaxError) -> Self

Converts to this type from the input type.

impl PartialEq for PlaceholderSyntaxError

fn eq(&self, other: &PlaceholderSyntaxError) -> 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 PlaceholderSyntaxError

impl StructuralPartialEq for PlaceholderSyntaxError