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// force-host
// no-prefer-dynamic
// check that having extern "C" functions in a proc macro doesn't crash.
#![crate_type="proc-macro"]
#![allow(non_snake_case)]
extern crate proc_macro;
macro_rules! proc_macro_tokenstream {
() => {
::proc_macro::TokenStream
};
}
macro_rules! proc_macro_expr_impl {
($(
$( #[$attr:meta] )*
pub fn $func:ident($input:ident: &str) -> String $body:block
)+) => {
$(
// Parses an input that looks like:
//
// ```
// #[allow(unused)]
// enum ProcMacroHack {
// Input = (stringify!(ARGS), 0).1,
// }
// ```
$( #[$attr] )*
#[proc_macro_derive($func)]
pub fn $func(input: proc_macro_tokenstream!()) -> proc_macro_tokenstream!() {
unsafe { rust_dbg_extern_identity_u64(0); }
panic!()
}
)+
};
}
proc_macro_expr_impl! {
pub fn base2_impl(input: &str) -> String {
panic!()
}
}
#[link(name="rust_test_helpers")]
extern "C" {
pub fn rust_dbg_extern_identity_u64(v: u64) -> u64;
}
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