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macros.rs
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/
macros.rs
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/// Find the directory for your source file
#[doc(hidden)] // forced to be visible in intended location
#[macro_export]
macro_rules! current_dir {
() => {{
let root = $crate::path::cargo_rustc_current_dir!();
let file = ::std::file!();
let rel_path = ::std::path::Path::new(file).parent().unwrap();
root.join(rel_path)
}};
}
/// Find the directory for your source file
#[doc(hidden)] // forced to be visible in intended location
#[macro_export]
macro_rules! current_rs {
() => {{
let root = $crate::path::cargo_rustc_current_dir!();
let file = ::std::file!();
let rel_path = ::std::path::Path::new(file);
root.join(rel_path)
}};
}
/// Find the base directory for [`std::file!`]
#[doc(hidden)] // forced to be visible in intended location
#[macro_export]
macro_rules! cargo_rustc_current_dir {
() => {{
if let Some(rustc_root) = ::std::option_env!("CARGO_RUSTC_CURRENT_DIR") {
::std::path::Path::new(rustc_root)
} else {
let manifest_dir = ::std::path::Path::new(::std::env!("CARGO_MANIFEST_DIR"));
manifest_dir
.ancestors()
.filter(|it| it.join("Cargo.toml").exists())
.last()
.unwrap()
}
}};
}
/// Path to the current function
///
/// Closures are ignored
#[doc(hidden)]
#[macro_export]
macro_rules! fn_path {
() => {{
fn f() {}
fn type_name_of_val<T>(_: T) -> &'static str {
std::any::type_name::<T>()
}
let mut name = type_name_of_val(f).strip_suffix("::f").unwrap_or("");
while let Some(rest) = name.strip_suffix("::{{closure}}") {
name = rest;
}
name
}};
}
#[cfg(test)]
mod test {
#[test]
fn direct_fn_path() {
assert_eq!(fn_path!(), "snapbox::macros::test::direct_fn_path");
}
#[test]
#[allow(clippy::redundant_closure_call)]
fn closure_fn_path() {
(|| {
assert_eq!(fn_path!(), "snapbox::macros::test::closure_fn_path");
})()
}
#[test]
fn nested_fn_path() {
fn nested() {
assert_eq!(fn_path!(), "snapbox::macros::test::nested_fn_path::nested");
}
nested()
}
}