Trait rustc_expand::base::MultiItemModifier

pub trait MultiItemModifier {
    fn expand(
        &self,
        ecx: &mut ExtCtxt<'_>,
        span: Span,
        meta_item: &MetaItem,
        item: Annotatable,
        is_derive_const: bool
    ) -> ExpandResult<Vec<Annotatable>, Annotatable>;
}

Required Methods

fn expand(
    &self,
    ecx: &mut ExtCtxt<'_>,
    span: Span,
    meta_item: &MetaItem,
    item: Annotatable,
    is_derive_const: bool
) -> ExpandResult<Vec<Annotatable>, Annotatable>

meta_item is the attribute, and item is the item being modified.

Implementors

impl MultiItemModifier for DeriveProcMacro

impl<F> MultiItemModifier for Fwhere
    F: Fn(&mut ExtCtxt<'_>, Span, &MetaItem, Annotatable) -> Vec<Annotatable>,