[rustc.git] / src / test / ui / rfc-2091-track-caller / call-chain.rs

// run-pass

use std::panic::Location;

struct Foo;

impl Foo {
    #[track_caller]
    fn check_loc(&self, line: u32, col: u32) -> &Self {
        let loc = Location::caller();
        assert_eq!(loc.file(), file!(), "file mismatch");
        assert_eq!(loc.line(), line, "line mismatch");
        assert_eq!(loc.column(), col, "column mismatch");
        self
    }
}

fn main() {
    // Tests that when `Location::caller` is used in a method chain,
    // it points to the start of the correct call (the first character after the dot)
    // instead of to the very first expression in the chain
    let foo = Foo;
    foo.
        check_loc(line!(), 9).check_loc(line!(), 31)
        .check_loc(line!(), 10);
}
Commit	Line	Data
f035d41b XL	1	// run-pass
	2
	3	use std::panic::Location;
	4
	5	struct Foo;
	6
	7	impl Foo {
	8	#[track_caller]
	9	fn check_loc(&self, line: u32, col: u32) -> &Self {
	10	let loc = Location::caller();
	11	assert_eq!(loc.file(), file!(), "file mismatch");
	12	assert_eq!(loc.line(), line, "line mismatch");
	13	assert_eq!(loc.column(), col, "column mismatch");
	14	self
	15	}
	16	}
	17
	18	fn main() {
	19	// Tests that when `Location::caller` is used in a method chain,
	20	// it points to the start of the correct call (the first character after the dot)
	21	// instead of to the very first expression in the chain
	22	let foo = Foo;
	23	foo.
	24	check_loc(line!(), 9).check_loc(line!(), 31)
	25	.check_loc(line!(), 10);
	26	}