Enum ParamsError 

pub enum ParamsError {
    MissingPathParams,
    DeserializationError(String),
}

Error types for path parameter extraction and deserialization.

This error type implements std::error::Error for integration with error handling libraries.

Variants

MissingPathParams

Path parameters not found in request extensions (internal routing error).

DeserializationError(String)

Parameter deserialization failed (type mismatch, missing field, etc.).

Trait Implementations

impl Clone for ParamsError

fn clone(&self) -> ParamsError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParamsError

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

Formats the value using the given formatter.

impl Display for ParamsError

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

Formats the value using the given formatter.

impl Eq for ParamsError

impl Error for ParamsError

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 ParamsError

fn eq(&self, other: &ParamsError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Responder for ParamsError

fn into_response(self) -> Response<TakoBody>

Converts path parameter errors into appropriate HTTP error responses.

MissingPathParams is an internal-routing condition (the router did not populate the extension), so the response body is intentionally generic — the detailed framing (“request extensions”) stays in the Display/tracing form so it does not leak through the wire.

impl StructuralPartialEq for ParamsError