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108 lines
3.1 KiB
Markdown
108 lines
3.1 KiB
Markdown
# fddl Programming Language
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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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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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## Why fddl?
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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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---
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## Current Features
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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 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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### Parse 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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## Running the Project
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Make sure your project compiles and the tests pass:
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```bash
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cargo build
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cargo test
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```
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---
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## Examples
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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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}
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```
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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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func square(x) => x ^ 2;
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}
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define $number := 5;
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print(`The square of $number is ${math.square($number)}`);
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```
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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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## Roadmap and Next Steps
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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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- [ ] Working on building out functions to parse simple functionality in the language (if, while, for), and to read their expressions and values
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- [ ] Implement parsing for function calls, expressions, checks, literally everything.
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- **Compiler**:
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- [ ] Currently a placeholder. Implement the compiler to compile 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 `stderr` with a more robust error handling mechanism.
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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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## License
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This project is licensed under the MIT License.
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