pub struct FormatArgs<'tcx> {
pub this: String,
pub trait_sugared: TraitRefPrintSugared<'tcx>,
pub item_context: &'static str,
pub generic_args: Vec<(Symbol, String)>,
}
Expand description
Arguments to fill a FormatString with.
For example, given a
ⓘ
#[rustc_on_unimplemented(
on(all(from_desugaring = "QuestionMark"),
message = "the `?` operator can only be used in {ItemContext} \
that returns `Result` or `Option` \
(or another type that implements `{FromResidual}`)",
label = "cannot use the `?` operator in {ItemContext} that returns `{Self}`",
parent_label = "this function should return `Result` or `Option` to accept `?`"
),
)]
pub trait FromResidual<R = <Self as Try>::Residual> {
...
}
async fn an_async_function() -> u32 {
let x: Option<u32> = None;
x?; //~ ERROR the `?` operator
22
}
it will look like this:
ⓘ
FormatArgs {
this: "FromResidual",
trait_sugared: "FromResidual<Option<Infallible>>",
item_context: "an async function",
generic_args: [("Self", "u32"), ("R", "Option<Infallible>")],
}
Fields§
§this: String
§trait_sugared: TraitRefPrintSugared<'tcx>
§item_context: &'static str
§generic_args: Vec<(Symbol, String)>
Trait Implementations§
Auto Trait Implementations§
impl<'tcx> DynSend for FormatArgs<'tcx>
impl<'tcx> DynSync for FormatArgs<'tcx>
impl<'tcx> Freeze for FormatArgs<'tcx>
impl<'tcx> !RefUnwindSafe for FormatArgs<'tcx>
impl<'tcx> Send for FormatArgs<'tcx>
impl<'tcx> Sync for FormatArgs<'tcx>
impl<'tcx> Unpin for FormatArgs<'tcx>
impl<'tcx> !UnwindSafe for FormatArgs<'tcx>
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, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
Source§impl<T> Filterable for T
impl<T> Filterable for T
Source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
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fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
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impl<T> Pointable for T
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impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
Source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T
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impl<T> WithSubscriber for T
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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: 80 bytes