Enum rustc_lint_defs::Level
source · pub enum Level {
Allow,
Expect(LintExpectationId),
Warn,
ForceWarn(Option<LintExpectationId>),
Deny,
Forbid,
}
Expand description
Setting for how to handle a lint.
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(Option<LintExpectationId>)
This lint level is a special case of Warn
, that can’t be overridden. This is used
to ensure that a lint can’t be suppressed. This lint level can currently only be set
via the console and is therefore session specific.
The LintExpectationId
is intended to fulfill expectations marked via the
#[expect]
attribute, that will still be suppressed due to the level.
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§
source§impl Level
impl Level
sourcepub fn from_str(x: &str) -> Option<Level>
pub fn from_str(x: &str) -> Option<Level>
Converts a lower-case string to a level. This will never construct the expect
level as that would require a LintExpectationId
pub fn to_cmd_flag(self) -> &'static str
pub fn is_error(self) -> bool
pub fn get_expectation_id(&self) -> Option<LintExpectationId>
Trait Implementations§
source§impl<__CTX> HashStable<__CTX> for Levelwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for Levelwhere __CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl Ord for Level
impl Ord for Level
source§impl PartialEq<Level> for Level
impl PartialEq<Level> for Level
source§impl PartialOrd<Level> for Level
impl PartialOrd<Level> for Level
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moreimpl Copy for Level
impl Eq for Level
impl StructuralEq for Level
impl StructuralPartialEq for Level
Auto Trait Implementations§
impl RefUnwindSafe for Level
impl Send for Level
impl Sync for Level
impl Unpin for Level
impl UnwindSafe for Level
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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: 24 bytes
Size for each variant:
Allow
: 0 bytesExpect
: 20 bytesWarn
: 0 bytesForceWarn
: 20 bytesDeny
: 0 bytesForbid
: 0 bytes