77 lines
2.1 KiB
Rust
77 lines
2.1 KiB
Rust
#![feature(core_intrinsics)]
|
|
|
|
use std::panic::Location;
|
|
|
|
#[track_caller]
|
|
fn tracked() -> &'static Location<'static> {
|
|
Location::caller() // most importantly, we never get line 7
|
|
}
|
|
|
|
fn nested_intrinsic() -> &'static Location<'static> {
|
|
Location::caller()
|
|
}
|
|
|
|
fn nested_tracked() -> &'static Location<'static> {
|
|
tracked()
|
|
}
|
|
|
|
macro_rules! caller_location_from_macro {
|
|
() => (core::panic::Location::caller());
|
|
}
|
|
|
|
fn test_fn_ptr() {
|
|
fn pass_to_ptr_call<T>(f: fn(T), x: T) {
|
|
f(x);
|
|
}
|
|
|
|
#[track_caller]
|
|
fn tracked_unit(_: ()) {
|
|
let expected_line = line!() - 1;
|
|
let location = std::panic::Location::caller();
|
|
assert_eq!(location.file(), file!());
|
|
assert_eq!(location.line(), expected_line, "call shims report location as fn definition");
|
|
}
|
|
|
|
pass_to_ptr_call(tracked_unit, ());
|
|
}
|
|
|
|
fn main() {
|
|
let location = Location::caller();
|
|
let expected_line = line!() - 1;
|
|
assert_eq!(location.file(), file!());
|
|
assert_eq!(location.line(), expected_line);
|
|
assert_eq!(location.column(), 20);
|
|
|
|
let tracked = tracked();
|
|
let expected_line = line!() - 1;
|
|
assert_eq!(tracked.file(), file!());
|
|
assert_eq!(tracked.line(), expected_line);
|
|
assert_eq!(tracked.column(), 19);
|
|
|
|
let nested = nested_intrinsic();
|
|
assert_eq!(nested.file(), file!());
|
|
assert_eq!(nested.line(), 11);
|
|
assert_eq!(nested.column(), 5);
|
|
|
|
let contained = nested_tracked();
|
|
assert_eq!(contained.file(), file!());
|
|
assert_eq!(contained.line(), 15);
|
|
assert_eq!(contained.column(), 5);
|
|
|
|
// `Location::caller()` in a macro should behave similarly to `file!` and `line!`,
|
|
// i.e. point to where the macro was invoked, instead of the macro itself.
|
|
let inmacro = caller_location_from_macro!();
|
|
let expected_line = line!() - 1;
|
|
assert_eq!(inmacro.file(), file!());
|
|
assert_eq!(inmacro.line(), expected_line);
|
|
assert_eq!(inmacro.column(), 19);
|
|
|
|
let intrinsic = core::intrinsics::caller_location();
|
|
let expected_line = line!() - 1;
|
|
assert_eq!(intrinsic.file(), file!());
|
|
assert_eq!(intrinsic.line(), expected_line);
|
|
assert_eq!(intrinsic.column(), 21);
|
|
|
|
test_fn_ptr();
|
|
}
|