zip-lang

An interpreter written in Go as described in Writing An Interpreter In Go. The book is great and I highly recommend it.

It's called Zip because there's no practical purpose to this language other than as a learning exercise in both Go and learning how interpreters work.

Supported Features

• Builtin Data Types
  • Integer
  • Float
  • String
  • Boolean
  • Character
  • Array
  • Hash
• Flow Control
  • If-Else
  • While
• Variables (Scoped to their block)
• First-class Functions
  • With/without Arguments
  • Closures
• IO
  • Put
  • Putln

Setup

1. Install Go sudo apt-get install golang-go
2. Clone this repo
3. Install dependencies make install

Visual Studio Code

• Run the set up script ./env_setup.sh

direnv

1. Install direnv sudo apt-get install direnv
2. Edit your .bashrc and add eval "$(direnv hook bash)" to the end
3. Activate in root directory of this repo direnv allow

Testing

• make test

Starting the REPL

• make run

Planned Feature Additions

• Float literals
• Character literals
• Variable assignment
• Assignment shortcut operators
• Prefix Increment and Decrement operators
• Postfix Increment and Decrement operators
• Remainder operator
• Power operator
• AND and OR operators
• Less Than or Equal and Greater Than or Equal operators
• Escape characters
• String comparison
• String multiplication operator
• Concatenate basic data types to strings
• String interpolation
• String index expressions
• Append to hash structure
• Set array value at index
• Set hash value at key
• Ternary statements
• Single and multi-line comments
• Else-If statements
• Switch statements
• While loops
• Until loop
• For loops
• Foreach loops
• Do-While loops
• Break and continue statements
• List comprehensions

Tenative Planned Features

• Package import
• Global constant variables
• Emojis

Todo

• Extend test coverage for builtins
• Extend tests to check for more types
• Read input from a file
• Add more builtin functions
  • Array and String includes function
  • Array all, any, etc type operators
• Add a wiki with language documentation
• Convert tests to use an assertion library