Fork Language Interpreter

A simple interpreter for a custom scripting language (.fork files) implemented in Rust. Supports control flow constructs (like for loops), arithmetic expressions, assignments, and print statements.

Features

• For Loops: C-style for loops, including variable initialization, condition, and increment.
• Arithmetic Expressions: Supports +, -, *, / in assignments and print statements.
• Print Statements: Print variables, string literals, and arithmetic expressions.
• Variable Assignment: Supports variables and re-assignment.
• File Extension Enforcement: Only files with .fork extension can be run.
• Clean Modular Code: Refactored for maintainability; control flow handled in dedicated modules.

Getting Started

Prerequisites

• Rust (edition 2021 or later)
• Git (to clone the repo)

Clone the Repository

git clone https://github.com/Sahildhillon0/fork.git
cd fork

Build

cargo build

Usage

Run a .fork File

cargo run ./src/test.fork

• Only files with the .fork extension are accepted.
• Example output:

  x =  20
  y*7 =  0
  y*7 =  7
  ...
  

Example .fork Program

x = 20;
print("x = ", x);
for (int y = 0; y < x; y = y + 1) {
    print("y*7 = ", y*7);
}

REPL Mode

If you run with no arguments:

cargo run

You get an interactive prompt:

fork> x = 5;
fork> print("x = ", x);
x =  5
fork> 

Type exit or quit to leave the REPL.

Project Structure

• src/main.rs - Entry point, file/repl handling, extension check
• src/interpreter/ - Interpreter logic
  • context.rs - Variable storage and context management
  • mod.rs - Module declarations for interpreter
  • control/ - Control flow modules:
    • mod.rs - Control module declarations
    • for_loop.rs - Implementation of for loops
    • if_else.rs - Implementation of if-else constructs
    • loops.rs - General loop handling
    • condition.rs - Conditional logic
  • statement/ - Statement handling modules:
    • mod.rs - Statement module declarations
    • assignment.rs - Assignment statement logic
    • print.rs - Print statement logic
• src/codegen.rs - Code generation logic (if applicable)
• src/test.fork - Example program

Contributing

Pull requests are welcome!

License

MIT