Rs
All modules
03
Beginner · 3 submodules · 9 lessons · 3h 13m

Structs, Enums & Pattern Matching

Model orders, sides, and option-like states with structs, enums, match, Option, and Result — hand-held with many finance examples.

Submodule 3.1

Structs & Methods

Domain types, constructors, and methods.

  1. 1

    Struct Basics

    Define Order and Quote structs, construct them, and compute simple fields.

    20 min
  2. 2

    impl Methods & Associated Functions

    Position::new, market_value, and unrealized PnL with &self.

    22 min
  3. 3

    Tuple Structs & Newtypes

    Price and Qty newtypes so you cannot mix units by accident.

    18 min

Submodule 3.2

Enums & match

Alternatives, data-carrying variants, exhaustive matches.

  1. 1

    Enums with Data

    Side and OrderType — replace stringly-typed trading code.

    22 min
  2. 2

    Pattern Matching in Depth

    Destructuring, match guards, and readable order-type descriptions.

    22 min
  3. 3

    Option Deep Dive

    Some/None, map, unwrap_or, if let — no more null crashes.

    24 min

Submodule 3.3

Result & Lab

Errors as values and a full order-ticket lab.

  1. 1

    Result Basics

    Ok/Err for parsing prices and recoverable failures.

    20 min
  2. 2

    The ? Operator

    Propagate errors in multi-field parsers without pyramid code.

    20 min
  3. 3

    Module 3 Lab: Order Ticket

    Combine Side, Order, describe, notional, and validate.

    25 min