rust/tests/ui/hygiene/auxiliary/codegen-attrs.rs

#![feature(decl_macro)]

macro m($f:ident) {
    #[export_name = "export_function_name"]
    pub fn $f() -> i32 {
        2
    }
}

m!(rust_function_name);
Stop emulating cross-crate hygiene with gensyms Most `Ident`s are serialized as `InternedString`s the exceptions are: * Reexports * Attributes * Idents in macro definitions Using gensyms helped reexports emulate hygiene. However, the actual item wouldn't have a gensymmed name so would be usable cross-crate. So removing this case until we have proper cross-crate hygiene seems sensible. Codegen attributes (`inline`, `export_name`) are resolved by their `Symbol`. This meant that opaque macro-expanded codegen attributes could cause linker errors. This prevented making built-in derives hygienic. 2019-08-11 05:48:22 -05:00			`#![feature(decl_macro)]`

			`macro m($f:ident) {`
			`#[export_name = "export_function_name"]`
			`pub fn $f() -> i32 {`
			`2`
			`}`
			`}`

			`m!(rust_function_name);`