[−][src]Struct syntax::ext::hygiene::ExpnInfo
Extra information for tracking spans of macro and syntax sugar expansion
Fields
call_site: Span
The location of the actual macro invocation or syntax sugar , e.g.
let x = foo!();
or if let Some(y) = x {}
This may recursively refer to other macro invocations, e.g., if
foo!()
invoked bar!()
internally, and there was an
expression inside bar!
; the call_site of the expression in
the expansion would point to the bar!
invocation; that
call_site span would have its own ExpnInfo, with the call_site
pointing to the foo!
invocation.
def_site: Option<Span>
The span of the macro definition itself. The macro may not have a sensible definition span (e.g., something defined completely inside libsyntax) in which case this is None. This span serves only informational purpose and is not used for resolution.
format: ExpnFormat
The format with which the macro was invoked.
allow_internal_unstable: bool
Whether the macro is allowed to use #[unstable]/feature-gated features internally without forcing the whole crate to opt-in to them.
allow_internal_unsafe: bool
Whether the macro is allowed to use unsafe
internally
even if the user crate has #![forbid(unsafe_code)]
.
local_inner_macros: bool
Enables the macro helper hack (ident!(...)
-> $crate::ident!(...)
)
for a given macro.
edition: Edition
Edition of the crate in which the macro is defined.
Trait Implementations
impl Decodable for ExpnInfo
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impl Encodable for ExpnInfo
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impl Debug for ExpnInfo
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impl Clone for ExpnInfo
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fn clone(&self) -> ExpnInfo
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fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Hash for ExpnInfo
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Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
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T: UseSpecializedEncodable + ?Sized,
impl<T> Decodable for T where
T: UseSpecializedDecodable,
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T: UseSpecializedDecodable,
impl<E> SpecializationError for E
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impl<T> Send for T where
T: ?Sized,
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T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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T: ?Sized,