Struct syntax::ext::quote::rt::Span [−][src]
#[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.
Methods
impl Span
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impl Span
pub fn new(lo: BytePos, hi: BytePos, ctxt: SyntaxContext) -> Span
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pub fn new(lo: BytePos, hi: BytePos, ctxt: SyntaxContext) -> Span
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pub fn data(self) -> SpanData
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pub fn data(self) -> SpanData
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impl Span
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impl Span
pub fn lo(self) -> BytePos
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pub fn lo(self) -> BytePos
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pub fn with_lo(self, lo: BytePos) -> Span
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pub fn with_lo(self, lo: BytePos) -> Span
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pub fn hi(self) -> BytePos
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pub fn hi(self) -> BytePos
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pub fn with_hi(self, hi: BytePos) -> Span
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pub fn with_hi(self, hi: BytePos) -> Span
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pub fn ctxt(self) -> SyntaxContext
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pub fn ctxt(self) -> SyntaxContext
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pub fn with_ctxt(self, ctxt: SyntaxContext) -> Span
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pub fn with_ctxt(self, ctxt: SyntaxContext) -> Span
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pub fn is_dummy(self) -> bool
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pub fn is_dummy(self) -> bool
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Returns true
if this is a dummy span with any hygienic context.
pub fn shrink_to_lo(self) -> Span
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pub fn shrink_to_lo(self) -> Span
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Returns a new span representing an empty span at the beginning of this span
pub fn shrink_to_hi(self) -> Span
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pub fn shrink_to_hi(self) -> Span
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Returns a new span representing an empty span at the end of this span
pub fn substitute_dummy(self, other: Span) -> Span
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pub fn substitute_dummy(self, other: Span) -> Span
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Returns self
if self
is not the dummy span, and other
otherwise.
pub fn contains(self, other: Span) -> bool
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pub fn contains(self, other: Span) -> bool
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Return true if self
fully encloses other
.
pub fn source_equal(&self, other: &Span) -> bool
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pub fn source_equal(&self, other: &Span) -> bool
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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.
pub fn trim_start(self, other: Span) -> Option<Span>
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pub fn trim_start(self, other: Span) -> Option<Span>
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Returns Some(span)
, where the start is trimmed by the end of other
pub fn source_callsite(self) -> Span
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pub fn source_callsite(self) -> Span
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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.
pub fn parent(self) -> Option<Span>
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pub fn parent(self) -> Option<Span>
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The Span
for the tokens in the previous macro expansion from which self
was generated,
if any
pub fn edition(self) -> Edition
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pub fn edition(self) -> Edition
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Edition of the crate from which this span came.
pub fn source_callee(self) -> Option<ExpnInfo>
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pub fn source_callee(self) -> Option<ExpnInfo>
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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.
pub fn allows_unstable(&self) -> bool
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pub fn allows_unstable(&self) -> bool
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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]
).
pub fn is_compiler_desugaring(&self, kind: CompilerDesugaringKind) -> bool
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pub fn is_compiler_desugaring(&self, kind: CompilerDesugaringKind) -> bool
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Check if this span arises from a compiler desugaring of kind kind
.
pub fn compiler_desugaring_kind(&self) -> Option<CompilerDesugaringKind>
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pub fn compiler_desugaring_kind(&self) -> Option<CompilerDesugaringKind>
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Return the compiler desugaring that created this span, or None if this span is not from a desugaring.
pub fn allows_unsafe(&self) -> bool
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pub fn allows_unsafe(&self) -> bool
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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
pub fn macro_backtrace(self) -> Vec<MacroBacktrace>
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pub fn macro_backtrace(self) -> Vec<MacroBacktrace>
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pub fn to(self, end: Span) -> Span
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pub fn to(self, end: Span) -> Span
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Return a Span
that would enclose both self
and end
.
pub fn between(self, end: Span) -> Span
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pub fn between(self, end: Span) -> Span
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Return a Span
between the end of self
to the beginning of end
.
pub fn until(self, end: Span) -> Span
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pub fn until(self, end: Span) -> Span
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Return a Span
between the beginning of self
to the beginning of end
.
pub fn from_inner_byte_pos(self, start: usize, end: usize) -> Span
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pub fn from_inner_byte_pos(self, start: usize, end: usize) -> Span
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pub fn apply_mark(self, mark: Mark) -> Span
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pub fn apply_mark(self, mark: Mark) -> Span
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pub fn remove_mark(&mut self) -> Mark
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pub fn remove_mark(&mut self) -> Mark
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pub fn adjust(&mut self, expansion: Mark) -> Option<Mark>
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pub fn adjust(&mut self, expansion: Mark) -> Option<Mark>
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pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn reverse_glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn reverse_glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn modern(self) -> Span
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pub fn modern(self) -> Span
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pub fn modern_and_legacy(self) -> Span
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pub fn modern_and_legacy(self) -> Span
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Trait Implementations
impl Clone for Span
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impl Clone for Span
fn clone(&self) -> Span
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fn clone(&self) -> Span
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl Debug for Span
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impl Debug for Span
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
Formats the value using the given formatter. Read more
impl PartialOrd<Span> for Span
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impl PartialOrd<Span> for Span
fn partial_cmp(&self, rhs: &Span) -> Option<Ordering>
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fn partial_cmp(&self, rhs: &Span) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
#[must_use]
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
#[must_use]
fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl Copy for Span
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impl Copy for Span
impl !Sync for Span
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impl !Sync for Span
impl Ord for Span
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impl Ord for Span
fn cmp(&self, rhs: &Span) -> Ordering
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fn cmp(&self, rhs: &Span) -> Ordering
This method returns an Ordering
between self
and other
. Read more
fn max(self, other: Self) -> Self
1.21.0[src]
fn max(self, other: Self) -> Self
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
Compares and returns the minimum of two values. Read more
impl Default for Span
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impl Default for Span
impl Hash for Span
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impl Hash for Span
fn hash<H>(&self, state: &mut H) where
H: Hasher,
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fn hash<H>(&self, state: &mut H) where
H: Hasher,
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl UseSpecializedDecodable for Span
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impl UseSpecializedDecodable for Span
fn default_decode<D>(d: &mut D) -> Result<Span, <D as Decoder>::Error> where
D: Decoder,
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fn default_decode<D>(d: &mut D) -> Result<Span, <D as Decoder>::Error> where
D: Decoder,
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Defaults to returning an error (see SpecializationError
).
impl Eq for Span
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impl Eq for Span
fn assert_receiver_is_total_eq(&self)
1.0.0[src]
fn assert_receiver_is_total_eq(&self)
impl !Send for Span
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impl !Send for Span
impl From<Span> for MultiSpan
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impl From<Span> for MultiSpan
impl UseSpecializedEncodable for Span
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impl UseSpecializedEncodable for Span
fn default_encode<S>(&self, s: &mut S) -> Result<(), <S as Encoder>::Error> where
S: Encoder,
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fn default_encode<S>(&self, s: &mut S) -> Result<(), <S as Encoder>::Error> where
S: Encoder,
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Defaults to returning an error (see SpecializationError
).
impl PartialEq<Span> for Span
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impl PartialEq<Span> for Span