61 lines
1.7 KiB
Plaintext
61 lines
1.7 KiB
Plaintext
---
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title: Structs
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description: Data modeling using Mist's type-first 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, but apply the language-wide `type name` declaration style and allow for comma-separated field 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 follows the Mist convention of placing the type before the identifier, separated by commas.
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```mist
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public struct Task {
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public String name,
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public TaskState state,
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public i32 executions,
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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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public struct NetworkNode {
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public u32 id,
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str* address,
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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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var 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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## Generics & Lifetimes
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Generics and lifetimes are declared in angle brackets after the struct name. Lifetimes are associated with the reference/pointer type within the field declarations.
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```mist
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public struct Buffer<'a, T> {
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public T'a* data,
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public usize len,
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}
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```
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## Key Characteristics
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- **Type-First Declaration**: Fields use the `type name` order to match function parameters and variable declarations.
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- **Comma-Separated Members**: Fields are separated by commas, maintaining a clean and consistent 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` keyword replaces `pub` for a more consistent modifier language across the codebase.
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