Enum gio::PollableReturn
source · #[non_exhaustive]pub enum PollableReturn {
Failed,
Ok,
WouldBlock,
}
Available on crate feature
v2_60
only.Expand description
Return value for various IO operations that signal errors via the return value and not necessarily via a #GError.
This enum exists to be able to return errors to callers without having to
allocate a #GError. Allocating #GErrors can be quite expensive for
regularly happening errors like IOErrorEnum::WouldBlock
.
In case of Failed
a #GError should be set for the
operation to give details about the error that happened.
Variants (Non-exhaustive)§
This enum is marked as 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.
Failed
Generic error condition for when an operation fails.
Ok
The operation was successfully finished.
WouldBlock
The operation would block.
Trait Implementations§
source§impl Clone for PollableReturn
impl Clone for PollableReturn
source§fn clone(&self) -> PollableReturn
fn clone(&self) -> PollableReturn
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for PollableReturn
impl Debug for PollableReturn
source§impl From<PollableReturn> for Value
impl From<PollableReturn> for Value
source§fn from(v: PollableReturn) -> Self
fn from(v: PollableReturn) -> Self
Converts to this type from the input type.
source§impl<'a> FromValue<'a> for PollableReturn
impl<'a> FromValue<'a> for PollableReturn
§type Checker = GenericValueTypeChecker<PollableReturn>
type Checker = GenericValueTypeChecker<PollableReturn>
Value type checker.
source§unsafe fn from_value(value: &'a Value) -> Self
unsafe fn from_value(value: &'a Value) -> Self
Get the contained value from a
Value
. Read moresource§impl HasParamSpec for PollableReturn
impl HasParamSpec for PollableReturn
type ParamSpec = ParamSpecEnum
§type SetValue = PollableReturn
type SetValue = PollableReturn
Preferred value to be used as setter for the associated ParamSpec.
type BuilderFn = fn(_: &str, _: PollableReturn) -> ParamSpecEnumBuilder<'_, PollableReturn>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for PollableReturn
impl Hash for PollableReturn
source§impl Ord for PollableReturn
impl Ord for PollableReturn
source§fn cmp(&self, other: &PollableReturn) -> Ordering
fn cmp(&self, other: &PollableReturn) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
source§impl PartialEq for PollableReturn
impl PartialEq for PollableReturn
source§impl PartialOrd for PollableReturn
impl PartialOrd for PollableReturn
source§impl StaticType for PollableReturn
impl StaticType for PollableReturn
source§fn static_type() -> Type
fn static_type() -> Type
Returns the type identifier of
Self
.source§impl ToValue for PollableReturn
impl ToValue for PollableReturn
source§impl ValueType for PollableReturn
impl ValueType for PollableReturn
§type Type = PollableReturn
type Type = PollableReturn
Type to get the
Type
from. Read moreimpl Copy for PollableReturn
impl Eq for PollableReturn
impl StructuralPartialEq for PollableReturn
Auto Trait Implementations§
impl Freeze for PollableReturn
impl RefUnwindSafe for PollableReturn
impl Send for PollableReturn
impl Sync for PollableReturn
impl Unpin for PollableReturn
impl UnwindSafe for PollableReturn
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
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T> IntoClosureReturnValue for T
impl<T> IntoClosureReturnValue for T
fn into_closure_return_value(self) -> Option<Value>
source§impl<T> PropertyGet for Twhere
T: HasParamSpec,
impl<T> PropertyGet for Twhere
T: HasParamSpec,
source§impl<T> StaticTypeExt for Twhere
T: StaticType,
impl<T> StaticTypeExt for Twhere
T: StaticType,
source§fn ensure_type()
fn ensure_type()
Ensures that the type has been registered with the type system.
source§impl<T> ToSendValue for T
impl<T> ToSendValue for T
source§fn to_send_value(&self) -> SendValue
fn to_send_value(&self) -> SendValue
Returns a
SendValue
clone of self
.