Struct rustc_feature::builtin_attrs::AttributeTemplate

pub struct AttributeTemplate {
    pub word: bool,
    pub list: Option<&'static str>,
    pub one_of: &'static [Symbol],
    pub name_value_str: Option<&'static str>,
}

A template that the attribute input must match. Only top-level shape (#[attr] vs #[attr(...)] vs #[attr = ...]) is considered now.

Fields

word: bool

If true, the attribute is allowed to be a bare word like #[test].

list: Option<&'static str>

If Some, the attribute is allowed to take a list of items like #[allow(..)].

one_of: &'static [Symbol]

If non-empty, the attribute is allowed to take a list containing exactly one of the listed words, like #[coverage(off)].

name_value_str: Option<&'static str>

If Some, the attribute is allowed to be a name/value pair where the value is a string, like #[must_use = "reason"].

Trait Implementations

impl Clone for AttributeTemplate

fn clone(&self) -> AttributeTemplate

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for AttributeTemplate

fn default() -> AttributeTemplate

Returns the “default value” for a type.

impl Copy for AttributeTemplate

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: 56 bytes