Enum rustc_hir::ConstContext

pub enum ConstContext {
    ConstFn,
    Static(Mutability),
    Const,
}

The kind of an item that requires const-checking.

Variants

ConstFn

A const fn.

Static(Mutability)

A static or static mut.

Const

A const, associated const, or other const context.

Other contexts include:

• Array length expressions
• Enum discriminants
• Const generics

For the most part, other contexts are treated just like a regular const, so they are lumped into the same category.

Implementations

impl ConstContext

pub fn keyword_name(self) -> &'static str

A description of this const context that can appear between backticks in an error message.

E.g. const or static mut.

Trait Implementations

impl Clone for ConstContext

fn clone(&self) -> ConstContext

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConstContext

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

Formats the value using the given formatter.

impl Display for ConstContext

A colloquial, trivially pluralizable description of this const context for use in error messages.

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

Formats the value using the given formatter.

impl PartialEq<ConstContext> for ConstContext

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for ConstContext

impl Eq for ConstContext

impl StructuralEq for ConstContext

impl StructuralPartialEq for ConstContext

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: 1 byte

Size for each variant:

• ConstFn: 0 bytes
• Static: 1 byte
• Const: 0 bytes