55 lines
1.5 KiB
Rust
55 lines
1.5 KiB
Rust
#![feature(track_caller, core_intrinsics)]
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use std::panic::Location;
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#[track_caller]
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fn tracked() -> &'static Location<'static> {
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Location::caller() // most importantly, we never get line 7
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}
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fn nested_intrinsic() -> &'static Location<'static> {
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Location::caller()
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}
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fn nested_tracked() -> &'static Location<'static> {
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tracked()
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}
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macro_rules! caller_location_from_macro {
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() => (core::panic::Location::caller());
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}
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fn main() {
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let location = Location::caller();
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assert_eq!(location.file(), file!());
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assert_eq!(location.line(), 23);
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assert_eq!(location.column(), 20);
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let tracked = tracked();
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assert_eq!(tracked.file(), file!());
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assert_eq!(tracked.line(), 28);
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assert_eq!(tracked.column(), 19);
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let nested = nested_intrinsic();
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assert_eq!(nested.file(), file!());
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assert_eq!(nested.line(), 11);
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assert_eq!(nested.column(), 5);
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let contained = nested_tracked();
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assert_eq!(contained.file(), file!());
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assert_eq!(contained.line(), 15);
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assert_eq!(contained.column(), 5);
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// `Location::caller()` in a macro should behave similarly to `file!` and `line!`,
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// i.e. point to where the macro was invoked, instead of the macro itself.
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let inmacro = caller_location_from_macro!();
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assert_eq!(inmacro.file(), file!());
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assert_eq!(inmacro.line(), 45);
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assert_eq!(inmacro.column(), 19);
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let intrinsic = core::intrinsics::caller_location();
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assert_eq!(intrinsic.file(), file!());
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assert_eq!(intrinsic.line(), 50);
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assert_eq!(intrinsic.column(), 21);
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}
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