Pyro

Pyro is a simple interpreted programming language built in Go.

Features

Pyro supports:

• Standard Output (print)
• Function Declarations
• Global Variables
• Arithmetic Expressions (+, -, *, /, %)
• Comparison Operators (<, <=, >, >=, ==, !=)
• Logical Operators (and, or, !)
• Control Flow
  • if / else
  • while loops
  • for loops
• Blocks & Scoping
• Closures and Lexical Scoping
• Tree-Walk Interpreter Architecture

⚙️ Dependencies

• Golang (Go 1.18 or later)

Running Pyro

To run a .pyro file:

./pyro <filename>.pyro

Sample Code

Here’s a sample Pyro program that prints the FizzBuzz sequence:

fun FizzBuzz(n) {
  for (var i = 1; i <= n; i = i + 1) {
    if (i % 3 == 0) {
      if (i % 5 == 0) {
        print "FizzBuzz";
      } else {
        print "Fizz";
      }
    } else {
      if (i % 5 == 0) {
        print "Buzz";
      } else {
        print i;
      }
    }
  }
}

FizzBuzz(15);

Credits

Pyro is based on the book Crafting Interpreters by Bob Nystrom.