blob: 0403684cda004febfbb194321e846782b051a6a5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// aux-build:attr-stmt-expr.rs
// aux-build:test-macros.rs
// compile-flags: -Z span-debug
#![feature(proc_macro_hygiene)]
#![feature(rustc_attrs)]
#![no_std] // Don't load unnecessary hygiene information from std
extern crate std;
extern crate test_macros;
extern crate attr_stmt_expr;
use test_macros::print_attr;
use attr_stmt_expr::{expect_let, expect_my_macro_stmt, expect_expr, expect_my_macro_expr};
// We don't use `std::println` so that we avoid loading hygiene
// information from libstd, which would affect the SyntaxContext ids
macro_rules! my_macro {
($($tt:tt)*) => { () }
}
fn print_str(string: &'static str) {
// macros are handled a bit differently
#[expect_my_macro_expr]
//~^ ERROR attributes on expressions are experimental
//~| HELP add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
my_macro!("{}", string)
}
macro_rules! make_stmt {
($stmt:stmt) => {
#[print_attr]
#[rustc_dummy]
$stmt
}
}
macro_rules! second_make_stmt {
($stmt:stmt) => {
make_stmt!($stmt);
}
}
fn main() {
make_stmt!(struct Foo {});
#[print_attr]
#[expect_let]
let string = "Hello, world!";
#[print_attr]
#[expect_my_macro_stmt]
my_macro!("{}", string);
#[print_attr]
second_make_stmt!(#[allow(dead_code)] struct Bar {});
#[print_attr]
#[rustc_dummy]
struct Other {}
#[expect_expr]
//~^ ERROR attributes on expressions are experimental
//~| HELP add `#![feature(stmt_expr_attributes)]` to the crate attributes to enable
print_str("string")
}
|
