70 lines
1.7 KiB
Plaintext
70 lines
1.7 KiB
Plaintext
---
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title: Structs
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description: Data modeling with Mist's name-first field convention.
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icon: Form
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---
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Structs in Mist follow the same structural logic as Rust, with fields using the language-wide `name Type` convention and comma-separated grouping.
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## Basic Syntax
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A struct is defined by its name followed by a block of fields. Each field places the identifier before the type.
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```mist
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pub struct Task {
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pub name String,
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pub state TaskState,
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pub executions i32,
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}
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```
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## Visibility
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Use the `pub` modifier to make the struct or its individual fields accessible from other modules.
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```mist
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pub struct NetworkNode {
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pub id u32,
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address *str,
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}
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```
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## Instantiation
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Structs are instantiated using the standard brace syntax.
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```mist
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let task = Task {
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name: "Initialize".to_string(),
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state: TaskState::Pending,
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executions: 0,
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};
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```
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## Destructuring
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Struct patterns use `let` with the struct name and field bindings:
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```mist
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let p = Point { x: 3, y: 4 };
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let Point { x, y } = p;
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```
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## Generics & Lifetimes
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Generics and lifetimes are declared in angle brackets after the struct name. Reference types use the `*` prefix.
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```mist
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pub struct Buffer<'a, T> {
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pub data *'a T,
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pub len usize,
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}
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```
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## Key Characteristics
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- **Name-First Declaration**: Fields use `name Type` order, consistent with function parameters and variable declarations.
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- **Comma-Separated Members**: Fields are separated by commas, maintaining a clean delimiter style.
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- **Rust Compatibility**: Maps 1:1 to Rust structs, ensuring zero-cost abstraction and full ecosystem interoperability.
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- **Direct Visibility**: The `pub` modifier controls access at the struct and field level.
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