Enum marker_api::common::Level

#[non_exhaustive]
#[repr(C)]
pub enum Level {
    Allow = 0,
    Warn = 1,
    Deny = 2,
    Forbid = 3,
}

Setting for how to handle a lint.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Allow = 0

The lint is allowed. A created diagnostic will not be emitted to the user by default. This level can be overridden. It’s useful for rather strict lints.

Warn = 1

The warn level will produce a warning if the lint was violated, however the compiler will continue with its execution.

This level might also be used in instances were the diagnostic is not emitted to the user but used internally. This can for instance happen for lint expectations (RFC 2383).

Deny = 2

The deny level will produce an error and stop further execution after the lint pass is complete.

Forbid = 3

The forbid level will produce an error and cannot be overridden by the user.

Choosing this diagnostic level should require heavy consideration, because should a lint with this level produce a false-positive, the user won’t have an option to allow the lint for this particular case, and will be forced to either:

• Write wrong code just to satisfy the lint
• Remove the whole lint crate

To produce an error, but make the lint possible to override see Deny.

Trait Implementations

impl Clone for Level

fn clone(&self) -> Level

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Level

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

Formats the value using the given formatter.

impl Hash for Level

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Level

fn cmp(&self, other: &Level) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Level

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Level

fn partial_cmp(&self, other: &Level) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Level

impl Eq for Level

impl StructuralEq for Level

impl StructuralPartialEq for Level