Implementation:Avhz RustQuant OrderSide

Knowledge Sources	RustQuant
Domains	Order_Management, Quantitative_Finance
Last Updated	2026-02-07 19:00 GMT

Overview

Concrete tool for representing the buy/sell side of a trading order provided by the RustQuant library.

Description

The OrderSide enum indicates which side of the order book an order belongs to: BID for buy orders or ASK for sell orders. The enum implements the Not trait (logical negation operator), so applying the ! operator to a BID returns ASK and vice versa, which is convenient for computing the opposite side in order matching logic. It also implements Display for human-readable output ("BID (buy)" and "ASK (sell)"). The enum derives Debug, Clone, Copy, PartialEq, and Eq.

Usage

Use this enum when constructing orders to specify whether they are buy or sell orders, and when routing orders to the correct side of an order book.

Code Reference

Source Location

• Repository: RustQuant
• File: crates/RustQuant_trading/src/order_side.rs
• Lines: 1-42

Signature

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OrderSide {
    BID,
    ASK,
}

impl std::ops::Not for OrderSide {
    type Output = OrderSide;
    fn not(self) -> Self::Output;
}

impl fmt::Display for OrderSide { ... }

Import

use RustQuant::trading::OrderSide;

I/O Contract

Inputs

Name	Type	Required	Description
variant	OrderSide	Yes	One of: BID (buy side) or ASK (sell side)

Outputs

Name	Type	Description
OrderSide	enum	The selected order side
!OrderSide	OrderSide	The opposite side (BID becomes ASK, ASK becomes BID)
Display	String	"BID (buy)" or "ASK (sell)"

Usage Examples

use RustQuant::trading::OrderSide;

let buy = OrderSide::BID;
let sell = OrderSide::ASK;

// Logical negation flips the side
assert_eq!(!buy, OrderSide::ASK);
assert_eq!(!sell, OrderSide::BID);

// Display formatting
println!("{}", buy);  // Output: BID (buy)
println!("{}", sell); // Output: ASK (sell)

Related Pages

• Principle:Avhz_RustQuant_Order_Management