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
67
68
69
70
71
72
73
74
75
76

/*!
Helper for <https://github.com/taiki-e/cargo-llvm-cov/issues/123>.

## Usage

Add this to your `Cargo.toml`:

```toml
[dev-dependencies]
coverage-helper = "0.1"
```

And add this to your crate root (`lib.rs` or `main.rs`):

```rust
#![cfg_attr(coverage_nightly, feature(no_coverage))]
```

## Examples

```rust
use coverage_helper::test;

#[test]
fn my_test() {
    // ...
}
```

Expanded to:

```rust
#[cfg_attr(coverage_nightly, no_coverage)]
#[::core::prelude::v1::test]
fn my_test() {
    // ...
}
```
*/

#![doc(test(
    no_crate_inject,
    attr(
        deny(warnings, rust_2018_idioms, single_use_lifetimes),
        allow(dead_code, unused_variables)
    )
))]
#![forbid(unsafe_code)]
#![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub)]
#![warn(clippy::pedantic)]

// older compilers require explicit `extern crate`.
#[allow(unused_extern_crates)]
extern crate proc_macro;

#[macro_use]
mod error;

#[macro_use]
mod quote;

use proc_macro::{Span, TokenStream};

#[proc_macro_attribute]
pub fn test(args: TokenStream, input: TokenStream) -> TokenStream {
    if !args.is_empty() {
        return format_err!(Span::call_site(), "attribute must be of the form `#[test]`")
            .into_compile_error();
    }
    let mut out = quote! {
        #[cfg_attr(coverage_nightly, no_coverage)]
        #[::core::prelude::v1::test]
    };
    out.extend(input);
    out
}