| // aux-build:attr-stmt-expr.rs |
| |
| #![feature(proc_macro_hygiene)] |
| |
| extern crate attr_stmt_expr; |
| use attr_stmt_expr::{expect_let, expect_print_stmt, expect_expr, expect_print_expr}; |
| |
| fn print_str(string: &'static str) { |
| // macros are handled a bit differently |
| #[expect_print_expr] |
| //~^ ERROR attributes on expressions are experimental |
| //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable |
| println!("{}", string) |
| } |
| |
| fn main() { |
| #[expect_let] |
| let string = "Hello, world!"; |
| |
| #[expect_print_stmt] |
| println!("{}", string); |
| |
| #[expect_expr] |
| //~^ ERROR attributes on expressions are experimental |
| //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable |
| print_str("string") |
| } |