#[repr(packed)]
pub struct Span(u32);
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A compressed span.
Contains either fields of SpanData
inline if they are small, or index into span interner.
The primary goal of Span
is to be as small as possible and fit into other structures
(that's why it uses packed
as well). Decoding speed is the second priority.
See SpanData
for the info on span fields in decoded representation.
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Returns true
if this is a dummy span with any hygienic context.
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Returns a new span representing an empty span at the beginning of this span
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Returns a new span representing an empty span at the end of this span
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Returns self
if self
is not the dummy span, and other
otherwise.
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Return true if self
fully encloses other
.
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Return true if the spans are equal with regards to the source text.
Use this instead of ==
when either span could be generated code,
and you only care that they point to the same bytes of source text.
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Returns Some(span)
, where the start is trimmed by the end of other
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Return the source span - this is either the supplied span, or the span for
the macro callsite that expanded to it.
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The Span
for the tokens in the previous macro expansion from which self
was generated,
if any
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Edition of the crate from which this span came.
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Return the source callee.
Returns None
if the supplied span has no expansion trace,
else returns the ExpnInfo
for the macro definition
corresponding to the source callsite.
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Check if a span is "internal" to a macro in which #[unstable]
items can be used (that is, a macro marked with
#[allow_internal_unstable]
).
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Check if this span arises from a compiler desugaring of kind kind
.
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Return the compiler desugaring that created this span, or None
if this span is not from a desugaring.
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Check if a span is "internal" to a macro in which unsafe
can be used without triggering the unsafe_code
lint
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Return a Span
that would enclose both self
and end
.
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Return a Span
between the end of self
to the beginning of end
.
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Return a Span
between the beginning of self
to the beginning of end
.
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
This method tests for !=
.
Formats the value using the given formatter. Read more
Feeds this value into the given [Hasher
]. Read more
Feeds a slice of this type into the given [Hasher
]. Read more
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
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Defaults to returning an error (see SpecializationError
).
Performs copy-assignment from source
. Read more
Returns the "default value" for a type. Read more
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Defaults to returning an error (see SpecializationError
).
This method returns an Ordering
between self
and other
. Read more
fn max(self, other: Self) -> Self | 1.21.0 [src] |
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self | 1.21.0 [src] |
Compares and returns the minimum of two values. Read more
type Owned = T
Creates owned data from borrowed data, usually by cloning. Read more
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recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
type Error = !
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The type returned in the event of a conversion error.
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Immutably borrows from an owned value. Read more
type Error = <U as TryFrom<T>>::Error
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The type returned in the event of a conversion error.
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Mutably borrows from an owned value. Read more
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this method will likely be replaced by an associated static
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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