| // force-host |
| // no-prefer-dynamic |
| |
| #![crate_type = "proc-macro"] |
| |
| extern crate proc_macro; |
| |
| use proc_macro::TokenStream; |
| |
| macro_rules! checker { |
| ($attr_name:ident, $expected:literal) => { |
| #[proc_macro_attribute] |
| pub fn $attr_name(attr: TokenStream, input: TokenStream) -> TokenStream { |
| assert!(attr.to_string().is_empty()); |
| assert_eq!(input.to_string(), $expected); |
| TokenStream::new() |
| } |
| } |
| } |
| |
| checker!(attr_extern, r#"extern "C" { |
| fn ffi(#[a1] arg1: i32, #[a2] ...); |
| }"#); |
| checker!(attr_extern_cvar, r#"unsafe extern "C" fn cvar(arg1: i32, #[a1] mut args: ...) { }"#); |
| checker!(attr_alias, "type Alias = fn(#[a1] u8, #[a2] ...);"); |
| checker!(attr_free, "fn free(#[a1] arg1: u8) { let lam = |#[a2] W(x), #[a3] y| (); }"); |
| checker!(attr_inherent_1, "fn inherent1(#[a1] self, #[a2] arg1: u8) { }"); |
| checker!(attr_inherent_2, "fn inherent2(#[a1] &self, #[a2] arg1: u8) { }"); |
| checker!(attr_inherent_3, "fn inherent3<'a>(#[a1] &'a mut self, #[a2] arg1: u8) { }"); |
| checker!(attr_inherent_4, "fn inherent4<'a>(#[a1] self: Box<Self>, #[a2] arg1: u8) { }"); |
| checker!(attr_trait_1, "fn trait1(#[a1] self, #[a2] arg1: u8);"); |
| checker!(attr_trait_2, "fn trait2(#[a1] &self, #[a2] arg1: u8);"); |
| checker!(attr_trait_3, "fn trait3<'a>(#[a1] &'a mut self, #[a2] arg1: u8);"); |
| checker!(attr_trait_4, "fn trait4<'a>(#[a1] self: Box<Self>, #[a2] arg1: u8, #[a3] Vec<u8>);"); |