pub enum Level {
    Allow,
    Expect(LintExpectationId),
    Warn,
    ForceWarn,
    Deny,
    Forbid,
}
Expand description

Setting for how to handle a lint.

See: https://doc.rust-lang.org/rustc/lints/levels.html

Variants

Allow

The allow level will not issue any message.

Expect(LintExpectationId)

The expect level will suppress the lint message but in turn produce a message if the lint wasn’t issued in the expected scope. Expect should not be used as an initial level for a lint.

Note that this still means that the lint is enabled in this position and should be emitted, this will in turn fulfill the expectation and suppress the lint.

See RFC 2383.

The LintExpectationId is used to later link a lint emission to the actual expectation. It can be ignored in most cases.

Warn

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

ForceWarn

Deny

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

Forbid

Forbid is equivalent to the deny level but can’t be overwritten like the previous levels.

Implementations

Converts a level to a lower-case string.

Converts a lower-case string to a level. This will never construct the expect level as that would require a LintExpectationId

Converts a symbol to a level.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

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

This method tests for !=.

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

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

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

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

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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes

Size for each variant:

  • Allow: 0 bytes
  • Expect: 16 bytes
  • Warn: 0 bytes
  • ForceWarn: 0 bytes
  • Deny: 0 bytes
  • Forbid: 0 bytes