Metadata-Version: 2.4
Name: glimlang
Version: 1.1.1
Summary: A simple toy programming language built in Python
License: Apache License
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# GlimLang 🌟

[![PyPI Version](https://img.shields.io/pypi/v/glimlang.svg)](https://pypi.org/project/glimlang/)
[![Python Version](https://img.shields.io/badge/python-3.8%2B-blue.svg)](https://www.python.org/)
[![License](https://img.shields.io/badge/license-Apache%202.0-green.svg)](file:///Users/salmanwaseemghori/Documents/glimlang/LICENSE)
[![Build Status](https://github.com/YOUR_GITHUB_USERNAME/glimlang/actions/workflows/test.yml/badge.svg)](https://github.com/YOUR_GITHUB_USERNAME/glimlang/actions)

GlimLang is a lightweight, educational toy programming language designed and implemented entirely from scratch in Python. It features a hand-written **Lexical Analyzer (Lexer)**, a recursive descent **Parser** that structures tokens into an **Abstract Syntax Tree (AST)**, and a stateful, **tree-walking Interpreter** supporting first-class environments.

GlimLang is packed with modern language constructs including first-class **anonymous functions (lambdas)**, **pattern matching (`match` statements)**, **classes (OOP)**, and a highly capable pre-compiled built-ins library. It serves as an accessible entry point for students, educators, and curious developers seeking to understand compiler design and programming language internals.

---

## 🚀 Key Features

- ⚙️ **Hand-Written Pipeline:** Completely custom Lexer and Parser written in readable Python with zero external parsing dependencies.
- 📦 **Rich Type System:** Numbers (floats/integers), Strings (with f-string dynamic interpolation), Booleans, explicit `null`, dynamic Arrays, and custom Blueprint Classes.
- 🎯 **Anonymous Functions & Closures:** Standard function statements (`def`) and inline lambdas (`fn`) that carry outer lexical scopes.
- 🔀 **Advanced Pattern Matching:** A robust `match` construct supporting piped patterns (`|`), fallback wildcards (`_`), and multi-statement block arms.
- 🏛️ **Object-Oriented Programming (OOP):** Custom blueprint templates (`class`), constructor instantiators (`init`), self-referencing properties (`self.x`), and standard methods.
- 🛠️ **Native Built-ins Library:** Over 40 native helper functions covering complex arithmetic, string slicing, array filter/maps, file reader/writers, and user input prompts.

---

## 📦 Installation

Ensure you have Python 3.8 or higher installed. Clone the repository and install it in editable developer mode:

```bash
git clone https://github.com/YOUR_GITHUB_USERNAME/glimlang.git
cd glimlang
pip install -e .
```

Verify your installation has registered the global `gl` command utility:
```bash
gl version
```
*Expected Output:*
```
GlimLang v1.1.1
```

---

## ⚡ Syntax Preview & Showcase

### Functions and Lexical Closures
```glim
# Let's create an anonymous function and assign it to a variable
let double = fn(x) { return x * 2 }
print double(10) # Prints 20.0

# Pass named/anonymous functions directly into array helper functions
let scores = [1, 2, 3, 4]
let doubled_scores = map(scores, double)
print doubled_scores # Prints [2.0, 4.0, 6.0, 8.0]
```

### Pattern Matching (`match`)
```glim
let browser_status = 404
match browser_status {
  200 => print "Success"
  404 => print "Page Not Found"
  500 | 502 => {
    print "Server Error!"
    print "Please try again later."
  }
  _ => print "Unknown Status Code"
}
```

---

## 🏃 Quick Start CLI Usage

### Run GlimLang Files
Save a simple print statement inside `hello.glim` and run it:
```bash
gl run examples/hello.glim
```

### Run the Interactive REPL
Type GlimLang expressions directly in an active terminal loop:
```bash
gl repl
```
*REPL Shell:*
```
GlimLang> let msg = "Hello from REPL!"
GlimLang> print msg
Hello from REPL!
GlimLang> exit
```

---

## 📂 Project Structure

```
glimlang/
├── src/                    # Compiler & Interpreter Core Engine
│   ├── lexer.py            # Lexical analysis (character streams -> tokens)
│   ├── parser.py           # Syntactic analysis (token lists -> AST nodes)
│   ├── ast_nodes.py        # Abstract Syntax Tree structural dataclasses
│   ├── interpreter.py      # Stateful environment walker & native builtins
│   ├── errors.py           # Standardized diagnostics and trace compiler
│   ├── cli.py              # Positional argument CLI router (run, repl, help)
│   ├── main.py             # Basic programmatic entrypoint
│   └── stdlib.glim         # Code helper utilities written in GlimLang
├── docs/                   # Beginner-Friendly Educational Guides
│   ├── GETTING_STARTED.md  # Installation, first hello-world, and REPL setup
│   ├── LANGUAGE_GUIDE.md   # Core syntax, scoping, OOP, and builtins list
│   ├── CLI.md              # Global CLI command references and output keys
│   ├── ARCHITECTURE.md     # Pipeline state flows and how to add a feature
│   └── EXAMPLES.md         # Example catalog with detailed output keys
├── examples/               # Progressively structured test programs
│   ├── hello.glim          # Hello World
│   ├── variables.glim      # Declarations and dynamic scoping
│   ├── math.glim           # Exponentiation, division, and modulo
│   ├── strings.glim        # Dynamic f-string interpolation
│   ├── conditions.glim     # Basic if-else branches
│   ├── nested_conditions.glim # Nested condition evaluations
│   ├── while_loop.glim     # Iterative loops with break/continue
│   ├── functions.glim      # Named functions and recursive stacks
│   ├── arrays.glim         # Array syntax and allocations
│   ├── indexing.glim       # Element retrieval and modification
│   ├── builtins.glim       # Demonstrates all built-in function groups
│   ├── countdown.glim      # Countdown iterations
│   ├── fizzbuzz.glim       # Classic FizzBuzz algorithm
│   ├── calculator.glim     # Matching calculator script
│   ├── grade_checker.glim  # Conditional grade calculator
│   └── simple_menu.glim    # Menu state machine
├── pyproject.toml          # Modern build metadata and CLI mapping
├── setup.py                # Setuptools project routing configuration
├── CONTRIBUTING.md         # Developer setup and AST feature safety checks
├── CHANGELOG.md            # Historical release logs
└── LICENSE                 # Project License File (Apache 2.0)
```

---

## 📚 Documentation Reference Links

Deep-dive into GlimLang subsystems using these detailed guides:
1. 🏁 [Getting Started Guide](file:///Users/salmanwaseemghori/Documents/glimlang/docs/GETTING_STARTED.md) — Steps for installing Python, GlimLang CLI, and launching the REPL.
2. 📝 [Language Syntax Guide](file:///Users/salmanwaseemghori/Documents/glimlang/docs/LANGUAGE_GUIDE.md) — Comprehensive syntax definitions, classes, built-ins, and common mistakes.
3. 💻 [CLI Reference Guide](file:///Users/salmanwaseemghori/Documents/glimlang/docs/CLI.md) — CLI flags, arguments, stdout, stderr, and exit codes.
4. ⚙️ [Architecture & Implementation Design](file:///Users/salmanwaseemghori/Documents/glimlang/docs/ARCHITECTURE.md) — Source code flow diagram, environment frames, and a tutorial on how to add a feature.
5. 📂 [Examples Catalog](file:///Users/salmanwaseemghori/Documents/glimlang/docs/EXAMPLES.md) — Review of pre-made sample files and expected terminal stdout.

---

## 🛠️ Development Setup

Check [CONTRIBUTING.md](file:///Users/salmanwaseemghori/Documents/glimlang/CONTRIBUTING.md) to set up a virtual environment, run code style formats, verify parser changes, and submit structured pull requests.

---

## 📄 License

GlimLang is licensed under the Apache License 2.0. See the [LICENSE](file:///Users/salmanwaseemghori/Documents/glimlang/LICENSE) file for the complete terms.

---

## 🗺️ Future Roadmap

- [ ] **Standard Module Imports:** File imports support (`import "math.glim"`).
- [ ] **Class Inheritance:** Support standard blueprint extensions (`class Dog in Animal`).
- [ ] **Inline Dictionary Literals:** Explicit dictionary literals (`let dict = { "x": 10 }`).
- [ ] **LSP Server:** Language Server Protocol integration for autocompletions in IDEs.
