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proc-macro
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derive-b.rs
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// force-host
// no-prefer-dynamic
#![
crate_type
=
"proc-macro"
]
extern
crate proc_macro
;
use
proc_macro
::
TokenStream
;
#[
proc_macro_derive
(
B
,
attributes
(
B
))]
pub
fn
derive_b
(
input
:
TokenStream
)
->
TokenStream
{
""
.
parse
().
unwrap
()
}