Enum DeclarationError

pub enum DeclarationError {
    AlreadyDeclared,
    NoValueAvailable,
    OverrideValueTypeMismatch,
    PriorValueTypeMismatch,
    InitialValueOutOfRange,
    InvalidRange,
}

Error that can be generated when doing operations on parameters.

Variants

AlreadyDeclared

Parameter was already declared and a new declaration was attempted.

NoValueAvailable

Parameter was declared as non optional but no value was available, either through a user specified default, a command-line override, or a previously set value.

OverrideValueTypeMismatch

The override value that was provided has the wrong type. This error is bypassed when using ParameterBuilder::ignore_override().

PriorValueTypeMismatch

The value that the parameter was already set to has the wrong type. This error is bypassed when using ParameterBuilder::discard_mismatching_prior_value.

InitialValueOutOfRange

The initial value that was selected is out of range.

InvalidRange

An invalid range was provided to a parameter declaration (i.e. lower bound > higher bound).

Trait Implementations

impl Debug for DeclarationError

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

Formats the value using the given formatter.

impl Display for DeclarationError

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

Formats the value using the given formatter.

impl Error for DeclarationError

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.