| ^^ the trait `std::iter::IntoIterator` is not implemented for `&[{integer}; 33]` | = help: the following implementations were found: <&'a [T; _] as std::iter::IntoIterator> <&'a [T] as std::iter::IntoIterator> <&'a mut [T; _] as std::iter::IntoIterator> <&'a ...
error[E0599]: `Vec<usize>` is not an iterator The fix in this case is to call anitermethod first and then usesumon the resulting iterator. By the way, RustRover has a feature that prevents errors like this one. It’s calledchained completion. To see the benefits in action,...
error[E0599]: `T` is not an iterator --> main.rs:2:7 | 1 | fn f<T>(a: T, b: T) -> std::cmp::Ordering { | - method `cmp` not found for this type parameter 2 | a.cmp(&b) | ^^^ `T` is not an iterator | = note: the following trait bounds were not satisfied:...
mentioned thison Jul 11, 2024 "is not an iterator" diagnostic through blanket implementation, when the type is actually an iterator but is missing a marker#127511 Sign up for freeto join this conversation on GitHub.Already have an account?Sign in to comment...
Rust 标准库实现的迭代器依托于 Iterator trait,它定义了一组抽象接口(abstraction),让使用者无需关心集合的底层实现细节,直接调用 next() 将集合作为迭代器进行访问,每次访问一个元素。 Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.提供一...
error: lifetime may not live long enough --> src/main.rs:6:29 | 6 | let closure = |x: &i32| x; | - - ^ returning this value requires that `'1` must outlive `'2` | | | | | return type of closure is &'2 i32
structures along with their corresponding closure types. In fact, specifying such a type explicitly in code is not allowed; closure types are anonymous, and we cannot refer to them directly in Rust’s syntax. Nonetheless, realizing what lies beneath the simpleimpl Iterator<Item=i32>notation is...
("{0}, in binary: {0:b}, in hexadecimal: {0:x}", 11);// debug trait (very useful to print anything)// if you try to print the array directly, you will get an error// because an array is not a string or number typeprintln!("{:?}", [11, 22, 33]);...
error: lifetime may not live long enough --> src/main.rs:6:29 | 6 | let closure = |x: &i32| x; | - - ^ returning this value requires that `'1` must outlive `'2` | | | | | return type of closure is &'2 i32
我曾经有过的所有这些对生命周期的误解,现在有很多初学者也深陷于此。我用到的术语可能不是标准的,所以下面列了一个表格来解释它们的用意。 误解列表 简而言之:变量的生命周期指的是这个变量所指的数据可以被编译器静态验证的、在当前内存地址有效期的长度。我现在会用大约~8000字来详细地解释一下那些容易误解的地方...