76 lines
1.7 KiB
Rust
76 lines
1.7 KiB
Rust
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// run-rustfix
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#![deny(clippy::try_err)]
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// Tests that a simple case works
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// Should flag `Err(err)?`
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pub fn basic_test() -> Result<i32, i32> {
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let err: i32 = 1;
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if true { // To avoid warnings during rustfix
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return Err(err);
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}
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Ok(0)
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}
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// Tests that `.into()` is added when appropriate
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pub fn into_test() -> Result<i32, i32> {
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let err: u8 = 1;
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if true { // To avoid warnings during rustfix
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return Err(err.into());
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}
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Ok(0)
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}
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// Tests that tries in general don't trigger the error
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pub fn negative_test() -> Result<i32, i32> {
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Ok(nested_error()? + 1)
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}
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// Tests that `.into()` isn't added when the error type
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// matches the surrounding closure's return type, even
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// when it doesn't match the surrounding function's.
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pub fn closure_matches_test() -> Result<i32, i32> {
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let res: Result<i32, i8> = Some(1).into_iter()
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.map(|i| {
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let err: i8 = 1;
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if true { // To avoid warnings during rustfix
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return Err(err);
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}
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Ok(i)
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})
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.next()
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.unwrap();
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Ok(res?)
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}
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// Tests that `.into()` isn't added when the error type
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// doesn't match the surrounding closure's return type.
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pub fn closure_into_test() -> Result<i32, i32> {
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let res: Result<i32, i16> = Some(1).into_iter()
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.map(|i| {
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let err: i8 = 1;
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if true { // To avoid warnings during rustfix
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return Err(err.into());
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}
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Ok(i)
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})
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.next()
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.unwrap();
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Ok(res?)
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}
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fn nested_error() -> Result<i32, i32> {
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Ok(1)
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}
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fn main() {
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basic_test().unwrap();
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into_test().unwrap();
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negative_test().unwrap();
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closure_matches_test().unwrap();
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closure_into_test().unwrap();
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}
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