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

// Copyright 2020 TiKV Project Authors. Licensed under Apache-2.0.

/// Get the name of the function where the macro is invoked. Returns a `&'static str`.
///
/// # Example
///
/// ```
/// use minitrace::func_name;
///
/// fn foo() {
///     assert_eq!(func_name!(), "foo");
/// }
/// # foo()
/// ```
#[macro_export]
macro_rules! func_name {
    () => {{
        fn f() {}
        fn type_name_of<T>(_: T) -> &'static str {
            std::any::type_name::<T>()
        }
        let name = type_name_of(f);
        let name = &name[..name.len() - 3];
        name.rsplit("::")
            .find(|name| *name != "{{closure}}")
            .unwrap()
    }};
}

/// Get the full path of the function where the macro is invoked. Returns a `&'static str`.
///
/// # Example
///
/// ```
/// use minitrace::full_name;
///
/// fn foo() {
///    assert_eq!(full_name!(), "rust_out::main::_doctest_main_minitrace_src_macros_rs_34_0::foo");
/// }
/// # foo()
#[macro_export]
macro_rules! full_name {
    () => {{
        fn f() {}
        fn type_name_of<T>(_: T) -> &'static str {
            std::any::type_name::<T>()
        }
        let name = type_name_of(f);
        let name = &name[..name.len() - 3];
        name.trim_end_matches("::{{closure}}")
    }};
}

/// Get the source file location where the macro is invoked. Returns a `&'static str`.
///
/// # Example
///
/// ```
/// use minitrace::file_location;
///
/// fn foo() {
///    assert_eq!(file_location!(), "minitrace/src/macros.rs:8:15");
/// }
/// # #[cfg(not(target_os = "windows"))]
/// # foo()
#[macro_export]
macro_rules! file_location {
    () => {
        std::concat!(file!(), ":", line!(), ":", column!())
    };
}