Structs

Structs in Mist follow the same structural logic as Rust, but apply the language-wide type name declaration style and allow for comma-separated field grouping.

Basic Syntax

A struct is defined by its name followed by a block of fields. Each field follows the Mist convention of placing the type before the identifier, separated by commas.

public struct Task {
    public String name,
    public TaskState state,
    public i32 executions,
}

Visibility

Use the public modifier to make the struct or its individual fields accessible from other modules.

public struct NetworkNode {
    public u32 id,
    str* address,
}

Instantiation

Structs are instantiated using the standard brace syntax.

var task = Task {
    name: "Initialize".to_string(),
    state: TaskState::Pending,
    executions: 0,
};

Generics & Lifetimes

Generics and lifetimes are declared in angle brackets after the struct name. Lifetimes are associated with the reference/pointer type within the field declarations.

public struct Buffer<'a, T> {
    public T'a* data,
    public usize len,
}

Key Characteristics

• Type-First Declaration: Fields use the type name order to match function parameters and variable declarations.
• Comma-Separated Members: Fields are separated by commas, maintaining a clean and consistent delimiter style.
• Rust Compatibility: Maps 1:1 to Rust structs, ensuring zero-cost abstraction and full ecosystem interoperability.
• Direct Visibility: The public keyword replaces pub for a more consistent modifier language across the codebase.