Pyoxide

A lightweight expression language interpreter written in Rust.

Features

• Arithmetic expressions with +, -, *, /
• Variable assignment
• Parentheses for grouping
• Interactive REPL
• File execution mode

Installation

cargo build --release

Usage

REPL Mode

Run without arguments to enter the interactive interpreter:

cargo run

Example session:

> x = 10
> y = 20
> x + y
30
> (x + y) * 2
60

File Mode

Run a .pyoxide file:

cargo run -- example.pyoxide

Example example.pyoxide:

radius = 5
area = 3.14 * radius * radius
area

Language Syntax

# Variable assignment
x = 10

# Expressions
y = x + 5        # addition
z = y - 3        # subtraction
result = z * 2   # multiplication
frac = result / 4  # division

# Parentheses
value = (x + y) * (z - 1)

# Print by evaluating
x + y

Architecture

Lexer  -->  Parser  -->  Interpreter

• Lexer: Tokenizes input source code
• Parser: Builds AST from tokens
• Interpreter: Evaluates expressions

License

MIT