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Обсуждение на тему: Rust reference

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Rust reference

It provides three kinds of material chapters that informally describe each language construct and their use. Chapters that informally describe the memory model, concurrency model, runtime services, linkage model, and debugging facilities. Appendix chapters providing rationale and references to languages that influenced the design. This document is the primary reference for the rust programming language. It provides three kinds of material chapters that informally describe each language construct and their use. A few productions in rusts grammar permit unicode code points outside the ascii range. We define these productions in terms of character properties specified in the unicode standard, rather than in terms of ascii-range code points. The grammar has a special unicode productions section that lists these productions.

Contribute to rust-langreference development by creating an account on github. This document is the primary reference for the rust programming language. It may include details that are specific to rustc itself, and should not be taken as a specification for the rust language. We intend to produce such a document someday, but this is what we have for now. References in c, in contrast, are quite dissimilar to rust references, even syntactically. Creating and dereferencing a reference is implicit in c int i 42 int &r ino & operator before i int j rno operator before r. While in rust these are explicit let i 42 let r &inote the & operator before i let j rnote the operator before r. Another difference is that you can reassign a reference in rust to another object let i 42 let mut r &ir is a reference to i let j 84 r &jr is now a reference to j.

Unleash the power of rust references! Dive into borrowing, mutable references, and craft safe code in a fun, engaging way. Explore rusts world of references, from understanding borrowing to leveraging shared and mutable references. Programming in rust without understanding references is like trying to eat soup with a fork. Effective? The constraints that a rust reference must point to a valid, correctly-aligned item is shared by cs reference types. However, c has no concept of lifetimes and so allows footguns 1 with dangling references c const int& dangle() int x 32 on the stack, overwritten later return x return reference to stack variable! Rusts borrowing and lifetime checks make the equivalent code broken at compile time fn dangle() - &static i64 let x i64 32 on the stack &x. Rust uses the concept of ownership, which is associated with how references are used. An ampersand (&) is used with a variables name while passing its reference instead of its value to a function.

The functions signature should also have an ampersand with the type of argument that receives the reference. When a function takes in a reference as a parameter, it is called borrowing. Rust also has non-owning pointer types called references, which have no effect on their referents lifetimes. You must make it apparent in your code that no reference can possibly outlive the value it points to. To emphasize this, rust refers to creating a reference to some value as borrowing the value what you have borrowed, you must eventually return to its owner. The references themselves are nothing specialunder the hood, theyre just addresses. .