1.
Introduction
2.
Lexical Elements
2.1.
Identifiers
2.2.
Keywords
2.3.
Constants
2.3.1.
Integers
2.3.2.
Floating-point numbers
2.3.3.
Characters
2.3.4.
Strings
2.4.
Operators
2.5.
Separators
2.6.
Space
3.
Expressions
3.1.
Environment
3.2.
Operators
3.3.
Anonymous semantics
3.4.
Modules
3.5.
Use
3.6.
Functions
3.7.
Traits
3.8.
Templates
3.9.
Variables
3.10.
Classes
3.11.
Enumerations
3.12.
Arrays
3.13.
Lambda functions
3.14.
Ensure
3.15.
Capabilities
3.16.
Tuples
4.
Kernel
4.1.
Data Types
4.1.1.
bool
4.1.2.
Integers
4.1.3.
Floating-point numbers
4.2.
Enum Option
4.3.
Functions
4.4.
Tuples
4.5.
Traits
4.6.
Classes
5.
License
Light (default)
Rust
Coal
Navy
Ayu
Feder: Reference Manual
Enum Option
use module std enum{T} Option None Some(T) ;