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readme.md
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readme.md
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# fddl Programming Language
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fddl is a small programming language inspired by various languages, designed to help learn language implementation concepts in Rust.
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**fddl** is a small, experimental programming language, built in Rust, designed to explore language implementation concepts. It's a blend of ideas from various languages but remains unique, with its own syntax and quirks.
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I have, off and on throughout the last 15 or so years attempted to learn a programming language of some sort. I could always get through the basics, but would get stuck with any real world projects. And I wouldn't know who to turn to even if I knew where to start.
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This project is both a learning experience and a passion project, where the goal is to build a working language from scratch, while embracing some of the core features I enjoy from other languages.
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So I started learning Rust and really like it. So I've been following some tutorials and the Crafting Interpretors site as guides for this very problematic programming language.
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## Why fddl?
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I like aspects of so many programming languages, but I don't really like any of them, so I always found it hard to pick one and stick with it. But I had the same problem playing World of Warcraft, too.
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For years, I’ve tried to learn various programming languages, and while I could master the basics, the real-world projects often eluded me. Rust, however, clicked for me, and fddl was born out of this journey. fddl is my attempt to combine the aspects I appreciate from many languages into something uniquely my own.
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So I, like many of you, decided to make a hobby programming language to see what may be able to be done with it.
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---
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## Features
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## Current Features
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- Custom syntax with unique operators and keywords
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- Documentation comments using `#`, similar to Rust's style
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- Lexer and parser built from scratch in Rust
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- **Custom Syntax**: fddl introduces unique operators and keywords to make programming more intuitive and fun.
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- **Lexer**: A working lexer that tokenizes fddl scripts into understandable pieces of the language.
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- **Tilde Operator**: Includes a custom `~` and `~=` operator for creative syntax possibilities.
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---
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## Getting Started
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To run the REPL:
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To start experimenting with fddl, you can run it in two ways:
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### Run the REPL (Interactive Mode)
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```sh
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cargo run
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```
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To run a fddl script:
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### Run a fddl Script
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```sh
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cargo run path/to/script.fddl
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```
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---
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## Examples
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```sh
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Here are a couple of examples showcasing the current capabilities of fddl:
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### Hello World
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```fddl
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func main() {
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print(`hello, world in fddl`);
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print("hello, world in fddl");
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}
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```
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```sh
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##! This is a sample module
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### Simple Math Module and Variable Declaration
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```fddl
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# This is a sample module
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module math {
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### Computes the square of a number
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# Computes the square of a number
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func square(x) => x ^ 2;
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}
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print(`The square of $number is ${math.square($number)}`);
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```
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(At least for right now.)
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## License
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This project is licensed under the MIT License.
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(Note: This feature is under development, and string interpolation is planned for a future update.)
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---
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## **Notes and Next Steps**
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## Roadmap and Next Steps
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- [x] Added first new set of tokens and features, added the first `lexer` tests.
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- [ ] `parser` module is a placeholder.
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- [ ] `interpreter` module is a placeholder.
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- [ ] Implement a more robust error handling mechanism instead of using `stderr`.
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- [ ] Imlement string interpolation (backticks with `$variable`)
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- [ ] Continue to expand tests to cover all new syntax and features.
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- [x] Made a crappy website.
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fddl is very much a work in progress, with lots of planned improvements and additions. Here's a breakdown of what’s done and what’s coming up:
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- **Lexer**:
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- [x] Built and tested for basic syntax and operators.
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- [x] Supports single-line and documentation comments.
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- [ ] Add support for more complex syntax and features.
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- **Parser**:
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- [ ] Currently a placeholder. Implement parsing for function calls, expressions, etc.
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- **Compiler**:
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- [ ] Currently a placeholder. Implement the compiler to execute parsed code.
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- **Comments**:
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- [x] Added support for single-line and documentation comments.
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- [ ] Implement multi-line comments.
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- [ ] Implement document building comments.
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- **Error Handling**:
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- [ ] Replace basic error reporting with a more robust error handling mechanism.
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- **String Interpolation**:
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- [ ] Implement string interpolation using backticks with `$variable` syntax.
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- **Testing**:
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- [x] Added initial lexer tests.
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- [ ] Expand tests to cover more syntax and edge cases.
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---
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## **Running the Project**
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## Running the Project
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Make sure your project compiles and the tests pass:
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cargo build
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cargo test
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```
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## License
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This project is licensed under the MIT License.
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