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use crate::deriving::path_std;
use crate::deriving::generic::*;
use crate::deriving::generic::ty::*;
use syntax::ast::MetaItem;
use syntax::ext::base::{Annotatable, ExtCtxt};
use syntax_pos::Span;
pub fn expand_deriving_unsafe_bound(cx: &mut ExtCtxt<'_>,
span: Span,
_: &MetaItem,
_: &Annotatable,
_: &mut dyn FnMut(Annotatable)) {
cx.span_err(span, "this unsafe trait should be implemented explicitly");
}
pub fn expand_deriving_copy(cx: &mut ExtCtxt<'_>,
span: Span,
mitem: &MetaItem,
item: &Annotatable,
push: &mut dyn FnMut(Annotatable)) {
let trait_def = TraitDef {
span,
attributes: Vec::new(),
path: path_std!(cx, marker::Copy),
additional_bounds: Vec::new(),
generics: LifetimeBounds::empty(),
is_unsafe: false,
supports_unions: true,
methods: Vec::new(),
associated_types: Vec::new(),
};
trait_def.expand(cx, mitem, item, push);
}
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