58 lines
1.5 KiB
Rust
58 lines
1.5 KiB
Rust
//@aux-build:option_helpers.rs
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#![warn(clippy::manual_is_variant_and)]
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#[macro_use]
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extern crate option_helpers;
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#[rustfmt::skip]
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fn option_methods() {
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let opt = Some(1);
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// Check for `option.map(_).unwrap_or_default()` use.
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// Single line case.
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let _ = opt.map(|x| x > 1)
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// Should lint even though this call is on a separate line.
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.unwrap_or_default();
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// Multi-line cases.
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let _ = opt.map(|x| {
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x > 1
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}
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).unwrap_or_default();
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let _ = opt.map(|x| x > 1).unwrap_or_default();
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let _ = opt
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.map(|x| x > 1)
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.unwrap_or_default();
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// won't fix because the return type of the closure is not `bool`
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let _ = opt.map(|x| x + 1).unwrap_or_default();
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let opt2 = Some('a');
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let _ = opt2.map(char::is_alphanumeric).unwrap_or_default(); // should lint
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let _ = opt_map!(opt2, |x| x == 'a').unwrap_or_default(); // should not lint
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}
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#[rustfmt::skip]
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fn result_methods() {
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let res: Result<i32, ()> = Ok(1);
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// multi line cases
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let _ = res.map(|x| {
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x > 1
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}
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).unwrap_or_default();
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let _ = res.map(|x| x > 1)
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.unwrap_or_default();
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// won't fix because the return type of the closure is not `bool`
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let _ = res.map(|x| x + 1).unwrap_or_default();
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let res2: Result<char, ()> = Ok('a');
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let _ = res2.map(char::is_alphanumeric).unwrap_or_default(); // should lint
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let _ = opt_map!(res2, |x| x == 'a').unwrap_or_default(); // should not lint
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}
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fn main() {
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option_methods();
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result_methods();
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}
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