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
.
Sourcepub fn from_symbol(s: Symbol, id: Option<AttrId>) -> Option<Level>
pub fn from_symbol(s: Symbol, id: Option<AttrId>) -> Option<Level>
Converts a Symbol
to a level.
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<SipHasher128>, )
Source§impl IntoDiagArg for Level
impl IntoDiagArg for Level
fn into_diag_arg(self) -> DiagArgValue
Source§impl Ord for Level
impl Ord for Level
Source§impl PartialOrd for Level
impl PartialOrd for Level
impl Copy for Level
impl Eq for Level
impl StructuralPartialEq for Level
Auto Trait Implementations§
impl DynSend for Level
impl DynSync for Level
impl Freeze for Level
impl RefUnwindSafe for Level
impl Send for Level
impl Sync for Level
impl Unpin for Level
impl UnwindSafe for Level
Blanket Implementations§
Source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T
fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]
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T: ?Sized,
impl<T> BorrowMut<T> for Twhere
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fn borrow_mut(&mut self) -> &mut T
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default fn to_debug_str(&self, _: Tcx) -> String
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fn into_either(self, into_left: bool) -> Either<Self, Self>
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into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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if into_left(&self)
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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: 20 bytes
Size for each variant:
Allow
: 0 bytesExpect
: 16 bytesWarn
: 0 bytesForceWarn
: 16 bytesDeny
: 0 bytesForbid
: 0 bytes