Struct SyntaxContext

#[repr(C)]
pub struct SyntaxContext(/* private fields */);

A SyntaxContext represents a chain of macro expansions (represented by marks).

Implementations

impl SyntaxContext

pub fn within_ignored_ctxt<F, Ret>(op: F) -> Ret

where F: FnOnce() -> Ret,

In op, EqIgnoreSpan of [Ident] will ignore the syntax context.

impl SyntaxContext

pub const fn empty() -> Self

pub fn has_mark(self, mark: Mark) -> bool

Returns true if self is marked with mark.

Panics if mark is not a valid mark.

pub fn as_u32(self) -> u32

pub fn from_u32(raw: u32) -> SyntaxContext

pub fn apply_mark(self, mark: Mark) -> SyntaxContext

Extend a syntax context with a given mark and default transparency for that mark.

pub fn remove_mark(&mut self) -> Mark

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 outer(self) -> Mark

Trait Implementations

impl Archive for SyntaxContext

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedSyntaxContext

The archived representation of this type.

type Resolver = SyntaxContextResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl<__C: Fallible + ?Sized> CheckBytes<__C> for SyntaxContext

where <__C as Fallible>::Error: Trace, u32: CheckBytes<__C>,

unsafe fn check_bytes( value: *const Self, context: &mut __C, ) -> Result<(), <__C as Fallible>::Error>

Checks whether the given pointer points to a valid value within the given context.

impl Clone for SyntaxContext

fn clone(&self) -> SyntaxContext

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SyntaxContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SyntaxContext

fn default() -> SyntaxContext

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SyntaxContext

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<__D: Fallible + ?Sized> Deserialize<SyntaxContext, __D> for Archived<SyntaxContext>

fn deserialize( &self, deserializer: &mut __D, ) -> Result<SyntaxContext, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl EqIgnoreSpan for SyntaxContext

fn eq_ignore_span(&self, other: &Self) -> bool

impl Hash for SyntaxContext

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for SyntaxContext

fn cmp(&self, other: &SyntaxContext) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SyntaxContext

fn eq(&self, other: &SyntaxContext) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for SyntaxContext

fn partial_cmp(&self, other: &SyntaxContext) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<__S: Fallible + ?Sized> Serialize<__S> for SyntaxContext

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Serialize for SyntaxContext

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for SyntaxContext

impl Eq for SyntaxContext

impl StructuralPartialEq for SyntaxContext