Struct MacroUseParser 

pub(crate) struct MacroUseParser {
    state: MacroUseArgs,
    uses_attr_spans: ThinVec<Span>,
    first_span: Option<Span>,
}

#[macro_use] attributes can either:

• Use all macros from a crate, if provided without arguments
• Use specific macros from a crate, if provided with arguments #[macro_use(macro1, macro2)] A warning should be provided if an use all is combined with specific uses, or if multiple use-alls are used.

Fields

state: MacroUseArgs

uses_attr_spans: ThinVec<Span>

Spans of all #[macro_use] arguments with arguments, used for linting

first_span: Option<Span>

If state is UseSpecific, stores the span of the first #[macro_use] argument, used as the span for this attribute If state is UseAll, stores the span of the first #[macro_use] arguments without arguments

Trait Implementations

impl<S: Stage> AttributeParser<S> for MacroUseParser

const ATTRIBUTES: &'static [(&'static [Symbol], AttributeTemplate, for<'sess> fn(&mut Self, &mut AcceptContext<'_, 'sess, S>, &ArgParser<'_>))]

The symbols for the attributes that this parser is interested in.

const ALLOWED_TARGETS: AllowedTargets = MACRO_USE_ALLOWED_TARGETS

fn finalize(self, _cx: &FinalizeContext<'_, '_, S>) -> Option<AttributeKind>

The parser has gotten a chance to accept the attributes on an item, here it can produce an attribute.

const TYPE: AttributeType = AttributeType::Normal

impl Default for MacroUseParser

fn default() -> MacroUseParser

Returns the “default value” for a type.

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