macro_toolset/
lib.rs

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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
//! Dev deps: some useful macros.

#[cfg(feature = "macros-base64")]
pub mod base64;
#[cfg(feature = "macros-hash")]
pub mod hash;
#[cfg(feature = "macros-random")]
pub mod random;
#[cfg(feature = "macros-string")]
pub mod string;

#[macro_export]
/// Faster way to get current timestamp other than
/// `chrono::Local::now().timestamp()`, 12x faster on my machine.
///
/// # Example
///
/// ```rust
/// # use macro_toolset::now;
/// let now_ts_sec = now!().as_secs(); // Seconds since UNIX_EPOCH
/// let now_ts_millis = now!().as_millis(); // Milliseconds since UNIX_EPOCH
/// ```
///
/// See [`Duration`](https://doc.rust-lang.org/std/time/struct.Duration.html) for more details.
macro_rules! now {
    () => {{
        match std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH) {
            Ok(t) => t,
            Err(_) => panic!("SystemTime before UNIX EPOCH!"),
        }
    }};
}

#[macro_export]
/// Init `tracing_subscriber` with default settings.
///
/// This is useful when running tests.
macro_rules! init_tracing_simple {
    () => {{
        use tracing::level_filters::LevelFilter;
        use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt, EnvFilter, Layer};

        let fmt_layer = tracing_subscriber::fmt::layer().with_filter(
            EnvFilter::builder()
                .with_default_directive(LevelFilter::DEBUG.into())
                .from_env_lossy()
                .add_directive("otel::tracing=trace".parse().unwrap())
                .add_directive("h2=error".parse().unwrap())
                .add_directive("tower=error".parse().unwrap())
                .add_directive("hyper=error".parse().unwrap()),
        );

        tracing_subscriber::registry().with(fmt_layer).init();
    }};
}

#[macro_export]
/// Helper macro for creating a wrapper type.
///
/// The wrapper type will implement [`Deref`](std::ops::Deref),
/// [`DerefMut`](std::ops::DerefMut), [`From`] and [`AsRef`].
///
/// # Example
///
/// ```rust
/// # use macro_toolset::wrapper;
/// wrapper!(pub MyString(pub String));
/// // derive is OK!
/// wrapper!(pub MyStringDerived(pub String), derive(Debug, Clone, PartialEq, Eq, Hash));
/// // Lifetime is supported too!
/// wrapper!(pub MyStringLifetime<'a>(&'a str));
/// ```
macro_rules! wrapper {
    ($vis:vis $name:ident$(<$($lt:lifetime),+>)?($($tt:tt)+) $(, <$($plt_name:ident: $plt:lifetime),+>)? $(, derive($($derive:path),+))?) => {
        $(#[derive($($derive),+)])?
        #[repr(transparent)]
        #[doc = concat!("Wrapper over `", stringify!($($tt)+), "`")]
        $vis struct $name<$($($lt),+)?> {
            inner: wrapper!(INNER $($tt)+),
            $($(
                $plt_name: std::marker::PhantomData<&$plt ()>,
            ),+)?
        }

        impl<$($($lt),+)?> From<wrapper!(INNER $($tt)+)> for $name<$($($lt),+)?> {
            #[inline]
            fn from(inner: wrapper!(INNER $($tt)+)) -> Self {
                Self {
                    inner,
                    $($($plt_name: std::marker::PhantomData),+)?
                }
            }
        }

        impl<$($($lt),+)?> std::ops::Deref for $name<$($($lt),+)?> {
            type Target = wrapper!(INNER $($tt)+);

            fn deref(&self) -> &Self::Target {
                &self.inner
            }
        }

        impl<$($($lt),+)?> std::ops::DerefMut for $name<$($($lt),+)?> {
            fn deref_mut(&mut self) -> &mut Self::Target {
                &mut self.inner
            }
        }

        impl<$($($lt),+)?> AsRef<wrapper!(INNER $($tt)+)> for $name<$($($lt),+)?> {
            fn as_ref(&self) -> &wrapper!(INNER $($tt)+) {
                &self.inner
            }
        }

        impl<$($($lt),+)?> $name<$($($lt),+)?> {
            #[inline]
            #[doc = concat!("Creates a new instance of [`", stringify!($name), "`]")]
            $vis const fn new(inner: wrapper!(INNER $($tt)+)) -> Self {
                Self {
                    inner,
                    $($($plt_name: std::marker::PhantomData),+)?
                }
            }
        }
    };
    (INNER $vis:vis $inner:ty) => {
        $inner
    };
    (INNER $vis:vis &$($lt:lifetime)? $inner:ty) => {
        &$($lt)? $inner
    };
    (INNER $vis:vis &mut $($lt:lifetime)? $inner:ty) => {
        &mut $($lt)? $inner
    };
}