Enum MustUsePath 

pub enum MustUsePath {
    Def(Span, DefId, Option<Symbol>),
    Boxed(Box<Self>),
    Pinned(Box<Self>),
    Opaque(Box<Self>),
    TraitObject(Box<Self>),
    TupleElement(Vec<(usize, Self)>),
    Result(Box<Self>),
    ControlFlow(Box<Self>),
    Array(Box<Self>, u64),
    Closure(Span),
    Coroutine(Span),
}

A path through a type to a must_use source. Contains useful info for the lint.

Variants

Def(Span, DefId, Option<Symbol>)

The root of the normal must_use lint with an optional message.

Boxed(Box<Self>)

Pinned(Box<Self>)

Opaque(Box<Self>)

TraitObject(Box<Self>)

TupleElement(Vec<(usize, Self)>)

Result(Box<Self>)

Result<T, Uninhabited>

ControlFlow(Box<Self>)

ControlFlow<Uninhabited, T>

Array(Box<Self>, u64)

Closure(Span)

The root of the unused_closures lint.

Coroutine(Span)

The root of the unused_coroutines lint.

Trait Implementations

impl Debug for MustUsePath

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

Formats the value using the given formatter.

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: 32 bytes

Size for each variant:

• Def: 20 bytes
• Boxed: 12 bytes
• Pinned: 12 bytes
• Opaque: 12 bytes
• TraitObject: 12 bytes
• TupleElement: 28 bytes
• Result: 12 bytes
• ControlFlow: 12 bytes
• Array: 20 bytes
• Closure: 8 bytes
• Coroutine: 8 bytes