Struct swc_common::hygiene::SyntaxContext [−][src]
pub struct SyntaxContext(_);
Expand description
A SyntaxContext represents a chain of macro expansions (represented by marks).
Implementations
impl SyntaxContext
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impl SyntaxContext
[src]pub const fn empty() -> Self
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pub fn apply_mark(self, mark: Mark) -> SyntaxContext
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pub fn apply_mark(self, mark: Mark) -> SyntaxContext
[src]Extend a syntax context with a given mark and default transparency for that mark.
pub fn remove_mark(&mut self) -> Mark
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pub fn remove_mark(&mut self) -> Mark
[src]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 adjust(&mut self, expansion: Mark) -> Option<Mark>
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pub fn adjust(&mut self, expansion: Mark) -> Option<Mark>
[src]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::$f`. }
This returns the expansion whose definition scope we use to privacy
check the resolution, or None
if we privacy check as usual (i.e.
not w.r.t. a macro definition scope).
pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
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pub fn glob_adjust(
&mut self,
expansion: Mark,
glob_ctxt: SyntaxContext
) -> Option<Option<Mark>>
[src]Adjust this context for resolution in a scope created by the given
expansion via a glob import with the given SyntaxContext
.
For example:
m!(f); macro m($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>>
[src]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 outer(self) -> Mark
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Trait Implementations
impl Clone for SyntaxContext
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impl Clone for SyntaxContext
[src]fn clone(&self) -> SyntaxContext
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fn clone(&self) -> SyntaxContext
[src]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)
1.0.0[src]Performs copy-assignment from source
. Read more
impl Debug for SyntaxContext
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impl Debug for SyntaxContext
[src]impl Default for SyntaxContext
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impl Default for SyntaxContext
[src]fn default() -> SyntaxContext
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fn default() -> SyntaxContext
[src]Returns the “default value” for a type. Read more
impl<'de> Deserialize<'de> for SyntaxContext
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impl<'de> Deserialize<'de> for SyntaxContext
[src]fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
[src]Deserialize this value from the given Serde deserializer. Read more
impl EqIgnoreSpan for SyntaxContext
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impl EqIgnoreSpan for SyntaxContext
[src]fn eq_ignore_span(&self, other: &Self) -> bool
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impl Hash for SyntaxContext
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impl Hash for SyntaxContext
[src]impl Ord for SyntaxContext
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impl Ord for SyntaxContext
[src]impl PartialEq<SyntaxContext> for SyntaxContext
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impl PartialEq<SyntaxContext> for SyntaxContext
[src]fn eq(&self, other: &SyntaxContext) -> bool
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fn eq(&self, other: &SyntaxContext) -> bool
[src]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
[src]This method tests for !=
.
impl PartialOrd<SyntaxContext> for SyntaxContext
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impl PartialOrd<SyntaxContext> for SyntaxContext
[src]fn partial_cmp(&self, other: &SyntaxContext) -> Option<Ordering>
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fn partial_cmp(&self, other: &SyntaxContext) -> Option<Ordering>
[src]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
1.0.0[src]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
1.0.0[src]This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
impl Serialize for SyntaxContext
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impl Serialize for SyntaxContext
[src]impl TypeEq for SyntaxContext
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impl TypeEq for SyntaxContext
[src]impl Copy for SyntaxContext
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impl Eq for SyntaxContext
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impl StructuralEq for SyntaxContext
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impl StructuralPartialEq for SyntaxContext
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Auto Trait Implementations
impl RefUnwindSafe for SyntaxContext
impl Send for SyntaxContext
impl Sync for SyntaxContext
impl Unpin for SyntaxContext
impl UnwindSafe for SyntaxContext
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 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> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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T: for<'de> Deserialize<'de>,