mirror of https://github.com/rust-lang/rust
49 lines
902 B
Rust
49 lines
902 B
Rust
//@ edition:2021
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fn foo(b: bool) -> impl std::fmt::Debug {
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if b {
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return vec![42]
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}
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[].into_iter().collect()
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}
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fn bar(b: bool) -> impl std::fmt::Debug {
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if b {
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return [].into_iter().collect()
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}
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vec![42]
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}
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fn bak(b: bool) -> impl std::fmt::Debug {
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if b {
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return std::iter::empty().collect()
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}
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vec![42]
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}
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fn baa(b: bool) -> impl std::fmt::Debug {
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if b {
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return [42].into_iter().collect()
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}
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vec![]
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}
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fn muh() -> Result<(), impl std::fmt::Debug> {
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Err("whoops")?;
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Ok(())
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//~^ ERROR type annotations needed
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}
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fn muh2() -> Result<(), impl std::fmt::Debug> {
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return Err(From::from("foo"));
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//~^ ERROR cannot call associated function on trait
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Ok(())
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}
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fn muh3() -> Result<(), impl std::fmt::Debug> {
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Err(From::from("foo"))
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//~^ ERROR cannot call associated function on trait
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}
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fn main() {}
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