glin

A tree-walk interpreter written in Go for the Lox language.

Get Started

Assuming you have the Go language and make build utility installed, just run make build post cloning this repository to create an executable binary.

The REPL might have bugs currently so it's just better to execute Lox programs through a file.

See the examples directory and read through Lox to learn writing Lox programs.

./glin examples/hello_world.lox

Note to Self

• Most of the files should've ideally been under a specific sub-package lox but the folder structure is not going to be refactored to preserve the version control history for personal future reference.
• This implementation doesn't have the clock native function as added by the author of the book.
• Extensions Implemented:
  • C-style Block Comments (without nesting)
  • REPL automatically prints the results for single expressions
  • + operand supports concatenation of string and number
  • break statements

Attribution

• Crafting Interpreters by Robert Nystrom
• AST Explorer was a great resource for exploring ASTs of various languages while I was creating the AstPrinter utility.

References:

• For any non-descript exit code in os.Exit(), refer: UNIX sysexits.h