Enum ExprUseNode

pub enum ExprUseNode<'tcx> {
    LetStmt(&'tcx LetStmt<'tcx>),
    ConstStatic(OwnerId),
    Return(OwnerId),
    Field(&'tcx ExprField<'tcx>),
    FnArg(&'tcx Expr<'tcx>, usize),
    MethodArg(HirId, Option<&'tcx GenericArgs<'tcx>>, usize),
    Callee,
    FieldAccess(Ident),
    AddrOf(BorrowKind, Mutability),
    Other,
}

The node which consumes a value.

Variants

LetStmt(&'tcx LetStmt<'tcx>)

Assignment to, or initializer for, a local

ConstStatic(OwnerId)

Initializer for a const or static item.

Return(OwnerId)

Implicit or explicit return from a function.

Field(&'tcx ExprField<'tcx>)

Initialization of a struct field.

FnArg(&'tcx Expr<'tcx>, usize)

An argument to a function.

MethodArg(HirId, Option<&'tcx GenericArgs<'tcx>>, usize)

An argument to a method.

Callee

The callee of a function call.

FieldAccess(Ident)

Access of a field.

AddrOf(BorrowKind, Mutability)

Borrow expression.

Other

Implementations

impl<'tcx> ExprUseNode<'tcx>

pub fn is_return(&self) -> bool

Checks if the value is returned from the function.

pub fn is_recv(&self) -> bool

Checks if the value is used as a method call receiver.

pub fn defined_ty(&self, cx: &LateContext<'tcx>) -> Option<DefinedTy<'tcx>>

Gets the needed type as it’s defined without any type inference.

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: 24 bytes

Size for each variant:

• LetStmt: 16 bytes
• ConstStatic: 8 bytes
• Return: 8 bytes
• Field: 16 bytes
• FnArg: 24 bytes
• MethodArg: 24 bytes
• Callee: 0 bytes
• FieldAccess: 16 bytes
• AddrOf: 6 bytes
• Other: 0 bytes