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