Enum rustc_resolve::macros::MacroRulesScope

pub enum MacroRulesScope<'a> {
    Empty,
    Binding(&'a MacroRulesBinding<'a>),
    Invocation(LocalExpnId),
}

The scope introduced by a macro_rules! macro. This starts at the macro’s definition and ends at the end of the macro’s parent module (named or unnamed), or even further if it escapes with #[macro_use]. Some macro invocations need to introduce macro_rules scopes too because they can potentially expand into macro definitions.

Variants

Empty

Empty “root” scope at the crate start containing no names.

Binding(&'a MacroRulesBinding<'a>)

The scope introduced by a macro_rules! macro definition.

Invocation(LocalExpnId)

The scope introduced by a macro invocation that can potentially create a macro_rules! macro definition.

Trait Implementations

impl<'a> Clone for MacroRulesScope<'a>

fn clone(&self) -> MacroRulesScope<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for MacroRulesScope<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for MacroRulesScope<'a>

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: 16 bytes

Size for each variant:

• Empty: 0 bytes
• Binding: 12 bytes
• Invocation: 4 bytes