//! Attributes producing expressions in invalid locations // aux-build:attr-stmt-expr.rs #![feature(proc_macro_hygiene)] #![feature(stmt_expr_attributes)] extern crate attr_stmt_expr; use attr_stmt_expr::{duplicate, no_output}; fn main() { let _ = #[no_output] "Hello, world!"; //~^ ERROR expected expression, found end of macro arguments let _ = #[duplicate] "Hello, world!"; //~^ ERROR macro expansion ignores token `,` and any following let _ = { #[no_output] "Hello, world!" }; let _ = { #[duplicate] //~^ ERROR macro expansion ignores token `,` and any following "Hello, world!" }; }