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)
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A "test" that can be applied to some "subject region" 'x
. These are used to
describe type constraints. Tests do not presently affect the
region values that get inferred for each variable; they only
examine the results after inference. This means they can
conveniently include disjuction ("a or b must be true").
🔬 This is a nightly-only experimental API. (rustc_private
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The subject region 'x
must by outlived by some region in
the given set of regions.
This test comes from e.g. a where clause like T: 'a + 'b
,
which implies that we know that T: 'a
and that T: 'b
. Therefore, if we are trying to prove that T: 'x
, we can
do so by showing that 'a: 'x
or 'b: 'x
.
🔬 This is a nightly-only experimental API. (rustc_private
)
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The subject region 'x
must by outlived by all regions in
the given set of regions.
This test comes from e.g. a projection type like T = <u32 as Trait<'a, 'b>>::Foo
, which must outlive 'a
or 'b
, and
maybe both. Therefore we can prove that T: 'x
if we know
that 'a: 'x
and 'b: 'x
.
🔬 This is a nightly-only experimental API. (rustc_private
)
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Any of the given tests are true.
This arises from projections, for which there are multiple
ways to prove an outlives relationship.
🔬 This is a nightly-only experimental API. (rustc_private
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All of the given tests are true.
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Immutably borrows from an owned value. Read more
type Error = <U as TryFrom<T>>::Error
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from
)
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
🔬 This is a nightly-only experimental API. (rustc_private
)
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
🔬 This is a nightly-only experimental API. (rustc_private
)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
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🔬 This is a nightly-only experimental API. (rustc_private
)
this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml
instead?