Struct rustc_ast::ast::Expr

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pub struct Expr {
    pub id: NodeId,
    pub kind: ExprKind,
    pub span: Span,
    pub attrs: AttrVec,
    pub tokens: Option<LazyAttrTokenStream>,
}
Expand description

An expression.

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§id: NodeId§kind: ExprKind§span: Span§attrs: AttrVec§tokens: Option<LazyAttrTokenStream>

Implementations§

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impl Expr

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pub fn is_potential_trivial_const_param(&self) -> bool

Is this expr either N, or { N }.

If this is not the case, name resolution does not resolve N when using min_const_generics as more complex expressions are not supported.

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pub fn to_bound(&self) -> Option<GenericBound>

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pub fn peel_parens(&self) -> &Expr

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pub fn to_ty(&self) -> Option<P<Ty>>

Attempts to reparse as Ty (for diagnostic purposes).

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pub fn precedence(&self) -> ExprPrecedence

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pub fn take(&mut self) -> Self

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pub fn is_approximately_pattern(&self) -> bool

To a first-order approximation, is this a pattern?

Trait Implementations§

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impl !AstDeref for Expr

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type Target

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fn ast_deref(&self) -> &Self::Target

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fn ast_deref_mut(&mut self) -> &mut Self::Target

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impl Clone for Expr

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fn clone(&self) -> Expr

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Expr

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

Formats the value using the given formatter. Read more
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impl<__D: Decoder> Decodable<__D> for Expr

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fn decode(__decoder: &mut __D) -> Self

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impl DummyAstNode for Expr

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fn dummy() -> Self

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impl<__E: Encoder> Encodable<__E> for Expr

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fn encode(&self, __encoder: &mut __E)

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impl HasAttrs for Expr

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const SUPPORTS_CUSTOM_INNER_ATTRS: bool = false

This is true if this HasAttrs might support ‘custom’ (proc-macro) inner attributes. Attributes like #![cfg] and #![cfg_attr] are not considered ‘custom’ attributes. Read more
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fn attrs(&self) -> &[Attribute]

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fn visit_attrs(&mut self, f: impl FnOnce(&mut AttrVec))

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impl HasNodeId for Expr

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fn node_id(&self) -> NodeId

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fn node_id_mut(&mut self) -> &mut NodeId

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impl HasSpan for Expr

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fn span(&self) -> Span

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impl HasTokens for Expr

Auto Trait Implementations§

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impl !RefUnwindSafe for Expr

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impl !Send for Expr

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impl !Sync for Expr

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impl Unpin for Expr

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impl !UnwindSafe for Expr

Blanket Implementations§

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impl<T> Any for Twhere
    T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere
    T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere
    T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere
    U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere
    T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere
    U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere
    U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes