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1 | // Copyright 2018 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
11 | // aux-build:attr-stmt-expr.rs | |
12 | // ignore-stage1 | |
13 | ||
83c7162d | 14 | #![feature(proc_macro, proc_macro_expr)] |
0531ce1d XL |
15 | |
16 | extern crate attr_stmt_expr; | |
17 | use attr_stmt_expr::{expect_let, expect_print_stmt, expect_expr, expect_print_expr}; | |
18 | ||
19 | fn print_str(string: &'static str) { | |
20 | // macros are handled a bit differently | |
21 | #[expect_print_expr] | |
22 | //~^ ERROR attributes on expressions are experimental | |
23 | //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable | |
24 | println!("{}", string) | |
25 | } | |
26 | ||
27 | fn main() { | |
28 | #[expect_let] | |
29 | let string = "Hello, world!"; | |
30 | ||
31 | #[expect_print_stmt] | |
32 | println!("{}", string); | |
33 | ||
34 | #[expect_expr] | |
35 | //~^ ERROR attributes on expressions are experimental | |
36 | //~| HELP add #![feature(stmt_expr_attributes)] to the crate attributes to enable | |
37 | print_str("string") | |
38 | } |