[−][src]Struct syntax::source_map::hygiene::SyntaxContext
🔬 This is a nightly-only experimental API. (rustc_private
)
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A SyntaxContext represents a chain of macro expansions (represented by marks).
Methods
impl SyntaxContext
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impl SyntaxContext
pub const fn empty() -> SyntaxContext
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pub const fn empty() -> SyntaxContext
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pub fn allocate_directly(expansion_info: ExpnInfo) -> SyntaxContext
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pub fn allocate_directly(expansion_info: ExpnInfo) -> SyntaxContext
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pub fn apply_mark(self, mark: Mark) -> SyntaxContext
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pub fn apply_mark(self, mark: Mark) -> SyntaxContext
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Extend a syntax context with a given mark and default transparency for that mark.
pub fn apply_mark_with_transparency(
self,
mark: Mark,
transparency: Transparency
) -> SyntaxContext
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pub fn apply_mark_with_transparency(
self,
mark: Mark,
transparency: Transparency
) -> SyntaxContext
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Extend a syntax context with a given mark and transparency
pub fn remove_mark(&mut self) -> Mark
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pub fn remove_mark(&mut self) -> Mark
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Pulls a single mark off of the syntax context. This effectively moves the context up one macro definition level. That is, if we have a nested macro definition as follows:
macro_rules! f { macro_rules! g { ... } }
and we have a SyntaxContext that is referring to something declared by an invocation of g (call it g1), calling remove_mark will result in the SyntaxContext for the invocation of f that created g1. Returns the mark that was removed.
pub fn marks(self) -> Vec<(Mark, Transparency)>
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pub fn marks(self) -> Vec<(Mark, Transparency)>
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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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Adjust this context for resolution in a scope created by the given expansion.
For example, consider the following three resolutions of f
:
mod foo { pub fn f() {} } // `f`'s `SyntaxContext` is empty. m!(f); macro m($f:ident) { mod bar { pub fn f() {} // `f`'s `SyntaxContext` has a single `Mark` from `m`. pub fn $f() {} // `$f`'s `SyntaxContext` is empty. } foo::f(); // `f`'s `SyntaxContext` has a single `Mark` from `m` //^ Since `mod foo` is outside this expansion, `adjust` removes the mark from `f`, //| and it resolves to `::foo::f`. bar::f(); // `f`'s `SyntaxContext` has a single `Mark` from `m` //^ Since `mod bar` not outside this expansion, `adjust` does not change `f`, //| and it resolves to `::bar::f`. bar::$f(); // `f`'s `SyntaxContext` is empty. //^ Since `mod bar` is not outside this expansion, `adjust` does not change `$f`, //| and it resolves to `::bar::$f`. }
This returns the expansion whose definition scope we use to privacy check the resolution,
or None
if we privacy check as usual (i.e. not w.r.t. a macro definition scope).
pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
🔬 This is a nightly-only experimental API. (rustc_private
)
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instead?
Adjust this context for resolution in a scope created by the given expansion
via a glob import with the given SyntaxContext
.
For example:
m!(f); macro m($i:ident) { mod foo { pub fn f() {} // `f`'s `SyntaxContext` has a single `Mark` from `m`. pub fn $i() {} // `$i`'s `SyntaxContext` is empty. } n(f); macro n($j:ident) { use foo::*; f(); // `f`'s `SyntaxContext` has a mark from `m` and a mark from `n` //^ `glob_adjust` removes the mark from `n`, so this resolves to `foo::f`. $i(); // `$i`'s `SyntaxContext` has a mark from `n` //^ `glob_adjust` removes the mark from `n`, so this resolves to `foo::$i`. $j(); // `$j`'s `SyntaxContext` has a mark from `m` //^ This cannot be glob-adjusted, so this is a resolution error. } }
This returns None
if the context cannot be glob-adjusted.
Otherwise, it returns the scope to use when privacy checking (see adjust
for details).
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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)
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instead?
Undo glob_adjust
if possible:
if let Some(privacy_checking_scope) = self.reverse_glob_adjust(expansion, glob_ctxt) { assert!(self.glob_adjust(expansion, glob_ctxt) == Some(privacy_checking_scope)); }
pub fn modern(self) -> SyntaxContext
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pub fn modern(self) -> SyntaxContext
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pub fn modern_and_legacy(self) -> SyntaxContext
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pub fn modern_and_legacy(self) -> SyntaxContext
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pub fn outer(self) -> Mark
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pub fn outer(self) -> Mark
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Trait Implementations
impl Eq for SyntaxContext
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impl Eq for SyntaxContext
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl PartialEq<SyntaxContext> for SyntaxContext
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impl PartialEq<SyntaxContext> for SyntaxContext
fn eq(&self, other: &SyntaxContext) -> bool
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fn eq(&self, other: &SyntaxContext) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &SyntaxContext) -> bool
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fn ne(&self, other: &SyntaxContext) -> bool
This method tests for !=
.
impl Encodable for SyntaxContext
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impl Encodable for SyntaxContext
fn encode<E>(&self, &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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fn encode<E>(&self, &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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impl Debug for SyntaxContext
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impl Debug for SyntaxContext
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 Decodable for SyntaxContext
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impl Decodable for SyntaxContext
fn decode<D>(&mut D) -> Result<SyntaxContext, <D as Decoder>::Error> where
D: Decoder,
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fn decode<D>(&mut D) -> Result<SyntaxContext, <D as Decoder>::Error> where
D: Decoder,
🔬 This is a nightly-only experimental API. (rustc_private
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impl Hash for SyntaxContext
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impl Hash for SyntaxContext
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 PartialOrd<SyntaxContext> for SyntaxContext
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impl PartialOrd<SyntaxContext> for SyntaxContext
fn partial_cmp(&self, other: &SyntaxContext) -> Option<Ordering>
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fn partial_cmp(&self, other: &SyntaxContext) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
fn lt(&self, other: &SyntaxContext) -> bool
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fn lt(&self, other: &SyntaxContext) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
fn le(&self, other: &SyntaxContext) -> bool
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fn le(&self, other: &SyntaxContext) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
fn gt(&self, other: &SyntaxContext) -> bool
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fn gt(&self, other: &SyntaxContext) -> bool
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
fn ge(&self, other: &SyntaxContext) -> bool
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fn ge(&self, other: &SyntaxContext) -> bool
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl Copy for SyntaxContext
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impl Copy for SyntaxContext
impl Clone for SyntaxContext
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impl Clone for SyntaxContext
fn clone(&self) -> SyntaxContext
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fn clone(&self) -> SyntaxContext
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 Default for SyntaxContext
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impl Default for SyntaxContext
fn default() -> SyntaxContext
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fn default() -> SyntaxContext
Returns the "default value" for a type. Read more
impl Ord for SyntaxContext
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impl Ord for SyntaxContext
fn cmp(&self, other: &SyntaxContext) -> Ordering
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fn cmp(&self, other: &SyntaxContext) -> 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
Auto Trait Implementations
impl Send for SyntaxContext
impl Send for SyntaxContext
impl Sync for SyntaxContext
impl Sync for SyntaxContext
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
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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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
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>
[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
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impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
[src]
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
[src]
impl<T> Decodable for T where
T: UseSpecializedDecodable,
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
[src]
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
[src]
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
🔬 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
impl<T> Erased for T
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impl<T> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T