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test: cover Result residual conversion for Exit #201

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test: cover Result residual conversion for Exit #201

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test: cover Result residual conversion
wenxiaojie1 Jul 21, 2026
b0ff448
test: narrow Exit residual conversion
wenxiaojie1 Jul 21, 2026
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17 changes: 17 additions & 0 deletions crates/try_v2_derive/tests/test_usage.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,12 @@ mod bound_ok_type {
FormalError { errno: i32, data: String },
}

impl From<String> for Exit<!> {
fn from(error: String) -> Self {
Self::OtherError(error)
}
}

#[test]
fn short_circuit_1() {
fn fail() -> Exit<()> {
Expand Down Expand Up @@ -77,6 +83,17 @@ mod bound_ok_type {
}
assert_matches!(pass(), Exit::Ok(()))
}

#[test]
fn result_to_exit_via_question_mark() {
fn from_std_result() -> Exit<()> {
let result: Result<(), String> = Err("oops".to_owned());
result?;
Exit::Ok(())
}

assert_matches!(from_std_result(), Exit::OtherError(text) if text == "oops")
}
}

mod multiple_generics {
Expand Down
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