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
|
//@ run-rustfix
#![allow(dead_code)]
pub fn foo(x: &str) -> Result<(), Box<dyn std::error::Error>> {
Err(format!("error: {x}"))
//~^ ERROR mismatched types
}
macro_rules! outer {
($x: expr) => {
inner!($x)
}
}
macro_rules! inner {
($x: expr) => {
format!("error: {}", $x)
//~^ ERROR mismatched types
}
}
fn bar(x: &str) -> Result<(), Box<dyn std::error::Error>> {
Err(outer!(x))
}
macro_rules! entire_fn_outer {
() => {
entire_fn!();
}
}
macro_rules! entire_fn {
() => {
pub fn baz(x: &str) -> Result<(), Box<dyn std::error::Error>> {
Err(format!("error: {x}"))
//~^ ERROR mismatched types
}
}
}
entire_fn_outer!();
macro_rules! nontrivial {
($x: expr) => {
Err(format!("error: {}", $x))
//~^ ERROR mismatched types
}
}
pub fn qux(x: &str) -> Result<(), Box<dyn std::error::Error>> {
nontrivial!(x)
}
fn main() {}
|
