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//! # dmacro: implemente function macro and debug macro and trace macro and log macro for Rust
//!
//!
//! This module contains the runtime support for the [`function!`] syntax extension. And also three useful macros [`trace!`], [`enter!`], [`leave!`] are implemented here.
//! This module contains simple and personal implementation of function macro [`function!`] and debug macro [`trace!`] and trace macro [`trace!`] and log macro [`trace!`] for Rust
//!
//!
//! ## Define **C-like** debug trace macro: `enter!()` and `leave!()`.
//!
//!
//! ## Check crate: [https://crates.io/crates/dmacro](https://crates.io/crates/dmacro)
//!
//!
//! ## Thanks to [https://stackoverflow.com/questions/38088067](https://stackoverflow.com/questions/38088067).
//!
//!
//! ## Example
//!
//! ```rust
//! use dmacro::*;
//!
//! fn main() {
//! enter!();
//! println!("Hello, world!");
//!
//! trace!();
//! trace!("church11");
//! trace!("church21", "church22",);
//! trace!("church31", "church32", "church33");
//! trace!("church31", "church32", "church33", 1024);
//! let y = 2023;
//! let m = 9;
//! let d = 28;
//! trace!(format!("{:04}-{:02}-{:02}", y, m, d));
//! trace!(format!("{y:04}-{m:02}-{d:02}"));
//! trace!(format!("{y:04}-{m:02}-{d:02}"), "enter");
//! trace!(format!("{y:04}-{m:02}-{d:02}"), "leave");
//!
//! leave!();
//! }
//! ```
//!
//!
//! ## More
//!
//! - [https://crates.io/crates/trace](https://crates.io/crates/trace)
//!
//!
///
/// ## Define **C-like** debug trace macro: `function!()`.
///
/// ```rust
/// use dmacro::*;
/// fn foo(n: usize) {
/// println!("{}", function!());
///
/// // ...
/// }
///
/// foo(20080512usize);
/// ```
///
#[macro_export]
macro_rules! function {
() => {{
fn f() {}
fn type_name_of<T>(_: T) -> &'static str {
// 'church
std::any::type_name::<T>()
}
let name = type_name_of(f);
&name[..name.len() - 3]
}};
}
///
/// ## Define **C-like** debug trace macro: `trace!()`.
///
/// ```rust
/// use dmacro::*;
/// fn foo(n: usize) {
/// trace!(format!("n = {}", n));
///
/// // ...
/// trace!("ur lucky!");
/// }
///
/// foo(20080512usize);
/// ```
///
#[macro_export]
macro_rules! trace {
() => {
println!(
"[{}][{}:{}:{}]{}/{}",
chrono::Local::now(),
file!(),
line!(),
column!(),
module_path!(),
$crate::function!()
)
};
($val:expr) => {
println!(
"[{}][{}:{}:{}]{}/{} {}",
chrono::Local::now(),
file!(),
line!(),
column!(),
module_path!(),
$crate::function!(),
$val
)
};
($val:expr $(,)?) => {
match $val {
tmp => {
println!(
"[{}][{}:{}:{}]{}/{} {}",
chrono::Local::now(),
file!(),
line!(),
column!(),
module_path!(),
$crate::function!(),
&tmp
);
tmp
}
}
};
($($val:expr),+ $(,)?) => {
($($crate::trace!($val)),+,)
};
}
///
/// ## Define **C-like** debug trace macro: `enter!()`.
///
/// ```rust
/// use dmacro::*;
/// fn foo(n: usize) {
/// enter!();
/// // ...
/// leave!();
/// }
///
/// foo(20080512usize);
/// ```
///
#[macro_export]
macro_rules! enter {
() => {
$crate::trace!("enter")
};
}
///
/// ## Define **C-like** debug trace macro: `leave!()`.
///
/// ```rust
/// use dmacro::*;
/// fn foo(n: usize) {
/// enter!();
/// // ...
/// leave!();
/// }
///
/// foo(20080512usize);
/// ```
///
#[macro_export]
macro_rules! leave {
() => {
$crate::trace!("leave")
};
}
#[cfg(test)]
pub(crate) mod tests {
use super::*;
#[test]
fn test1() {
enter!();
leave!();
}
#[test]
fn test2() {
trace!("enter");
trace!("leave");
}
#[test]
fn test3() {
trace!();
trace!("");
trace!("OK");
trace!(20080512usize);
}
}