78 lines
1.8 KiB
Rust
78 lines
1.8 KiB
Rust
// run-rustfix
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#![warn(clippy::unwrap_or_else_default)]
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#![allow(dead_code)]
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#![allow(clippy::unnecessary_wraps)]
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/// Checks implementation of the `UNWRAP_OR_ELSE_DEFAULT` lint.
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fn unwrap_or_else_default() {
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struct Foo;
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impl Foo {
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fn new() -> Foo {
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Foo
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}
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// fake default, we should not trigger on this
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fn default() -> Foo {
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Foo
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}
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}
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struct HasDefaultAndDuplicate;
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impl HasDefaultAndDuplicate {
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fn default() -> Self {
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HasDefaultAndDuplicate
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}
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}
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impl Default for HasDefaultAndDuplicate {
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fn default() -> Self {
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HasDefaultAndDuplicate
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}
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}
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enum Enum {
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A(),
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}
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fn make<T, V>(_: V) -> T {
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unimplemented!();
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}
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let with_enum = Some(Enum::A());
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with_enum.unwrap_or_else(Enum::A);
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let with_new = Some(vec![1]);
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with_new.unwrap_or_else(Vec::new);
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let with_err: Result<_, ()> = Ok(vec![1]);
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with_err.unwrap_or_else(make);
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// should not be changed
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let with_fake_default = None::<Foo>;
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with_fake_default.unwrap_or_else(Foo::default);
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// should not be changed
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let with_fake_default2 = None::<HasDefaultAndDuplicate>;
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with_fake_default2.unwrap_or_else(<HasDefaultAndDuplicate>::default);
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let with_real_default = None::<HasDefaultAndDuplicate>;
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with_real_default.unwrap_or_else(<HasDefaultAndDuplicate as Default>::default);
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let with_default_trait = Some(1);
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with_default_trait.unwrap_or_else(Default::default);
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let with_default_type = Some(1);
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with_default_type.unwrap_or_else(u64::default);
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let with_default_type: Option<Vec<u64>> = None;
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with_default_type.unwrap_or_else(Vec::new);
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let empty_string = None::<String>;
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empty_string.unwrap_or_else(|| "".to_string());
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}
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fn main() {}
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