Enum ArgError 

pub enum ArgError {
    Missing {
        name: String,
    },
    Unknown {
        name: String,
    },
    WrongType {
        name: String,
        expected: ParamType,
        got: ParamType,
    },
    NotAllowed {
        name: String,
        value: String,
        allowed: Vec<String>,
    },
    Unrepresentable {
        name: String,
    },
    Constraint {
        name: String,
        reason: String,
    },
}

Why a set of arguments does not satisfy an action’s parameters.

Each variant names the parameter, because a caller that cannot see the screen has nothing else to correct against.

Variants

Missing

Fields

name: String

Unknown

Fields

name: String

WrongType

Fields

name: String

expected: ParamType

got: ParamType

NotAllowed

The value was the right type but outside the parameter’s declared choices.

Fields

name: String

value: String

allowed: Vec<String>

Unrepresentable

The JSON value was not one of the shapes an ArgValue can carry (an object, an array, or null).

Fields

name: String

Constraint

Fields

name: String

reason: String

Trait Implementations

impl Clone for ArgError

fn clone(&self) -> ArgError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArgError

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

Formats the value using the given formatter.

impl Display for ArgError

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

Formats the value using the given formatter.

impl Error for ArgError

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<ArgError> for ActionBindingError

fn from(source: ArgError) -> ActionBindingError

Converts to this type from the input type.

impl PartialEq for ArgError

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

impl StructuralPartialEq for ArgError