Rust Programming | Mutability | Ownership

Introduction

In this lab, the mutability of data is demonstrated through Rust programming language by showcasing how ownership and mutability can be changed when a box is moved from an immutable state to a mutable state.

Note: If the lab does not specify a file name, you can use any file name you want. For example, you can use main.rs, compile and run it with rustc main.rs && ./main.

Skills Graph

%%%%{init: {'theme':'neutral'}}%%%% flowchart RL rust(("`Rust`")) -.-> rust/BasicConceptsGroup(["`Basic Concepts`"]) rust(("`Rust`")) -.-> rust/FunctionsandClosuresGroup(["`Functions and Closures`"]) rust(("`Rust`")) -.-> rust/DataStructuresandEnumsGroup(["`Data Structures and Enums`"]) rust/BasicConceptsGroup -.-> rust/variable_declarations("`Variable Declarations`") rust/BasicConceptsGroup -.-> rust/mutable_variables("`Mutable Variables`") rust/FunctionsandClosuresGroup -.-> rust/function_syntax("`Function Syntax`") rust/FunctionsandClosuresGroup -.-> rust/expressions_statements("`Expressions and Statements`") rust/DataStructuresandEnumsGroup -.-> rust/method_syntax("`Method Syntax`") subgraph Lab Skills rust/variable_declarations -.-> lab-99196{{"`Rust Mutability Ownership Demonstration`"}} rust/mutable_variables -.-> lab-99196{{"`Rust Mutability Ownership Demonstration`"}} rust/function_syntax -.-> lab-99196{{"`Rust Mutability Ownership Demonstration`"}} rust/expressions_statements -.-> lab-99196{{"`Rust Mutability Ownership Demonstration`"}} rust/method_syntax -.-> lab-99196{{"`Rust Mutability Ownership Demonstration`"}} end

Mutability

Mutability of data can be changed when ownership is transferred.

fn main() { let immutable_box = Box::new(5u32); println!("immutable_box contains {}", immutable_box); // Mutability error //*immutable_box = 4; // *Move* the box, changing the ownership (and mutability) let mut mutable_box = immutable_box; println!("mutable_box contains {}", mutable_box); // Modify the contents of the box *mutable_box = 4; println!("mutable_box now contains {}", mutable_box); }

Rust Mutability Ownership Demonstration

Introduction

Skills Graph

Mutability

Summary

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