rust/tests/coverage/partial_eq.rs
Zalathar 9dc6e08279 Manually run x fmt on all source files in tests/coverage/
Currently we can't automatically enforce formatting on tests (see ), but
we can at least keep things relatively tidy by occasionally running the
formatter manually.

This was done by temporarily commenting out the `"/tests/"` exclusion in
`rustfmt.toml`, and then running `x fmt tests/coverage` and
`x test coverage --bless`.
2024-05-29 14:34:17 +10:00

48 lines
1.4 KiB
Rust

// This test confirms an earlier problem was resolved, supporting the MIR graph generated by the
// structure of this test.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub struct Version {
major: usize,
minor: usize,
patch: usize,
}
impl Version {
pub fn new(major: usize, minor: usize, patch: usize) -> Self {
Self { major, minor, patch }
}
}
fn main() {
let version_3_2_1 = Version::new(3, 2, 1);
let version_3_3_0 = Version::new(3, 3, 0);
println!(
"{:?} < {:?} = {}",
version_3_2_1,
version_3_3_0,
version_3_2_1 < version_3_3_0, //
);
}
/*
This test verifies a bug was fixed that otherwise generated this error:
thread 'rustc' panicked at 'No counters provided the source_hash for function:
Instance {
def: Item(WithOptConstParam {
did: DefId(0:101 ~ autocfg[c44a]::version::{impl#2}::partial_cmp),
const_param_did: None
}),
args: []
}'
The `PartialOrd` derived by `Version` happened to generate a MIR that generated coverage
without a code region associated with any `Counter`. Code regions were associated with at least
one expression, which is allowed, but the `function_source_hash` was only passed to the codegen
(coverage mapgen) phase from a `Counter`s code region. A new method was added to pass the
`function_source_hash` without a code region, if necessary.
*/