MichiganTypeScript is a proof-of-concept project demonstrating a WebAssembly runtime implemented entirely within TypeScript's type system. It doesn't actually execute WebAssembly code, but instead uses advanced type-level programming techniques to simulate its execution. By representing WebAssembly instructions and memory as types, and leveraging TypeScript's type inference and checking capabilities, the project can statically verify the behavior of a given WebAssembly program. This effectively transforms TypeScript's type checker into an interpreter, showcasing the power and flexibility of its type system, albeit in a non-practical, purely theoretical manner.
Neut is a statically-typed, compiled programming language designed for building reliable and maintainable systems software. It emphasizes simplicity and explicitness through its C-like syntax, minimal built-in features, and focus on compile-time evaluation. Key features include a powerful macro system enabling metaprogramming and code generation, algebraic data types for representing data structures, and built-in support for pattern matching. Neut aims to empower developers to write efficient and predictable code by offering fine-grained control over memory management and avoiding hidden runtime behavior. Its explicit design choices and limited standard library encourage developers to build reusable components tailored to their specific needs, promoting code clarity and long-term maintainability.
HN commenters generally express interest in Neut, praising its focus on simplicity, safety, and explicitness. Several highlight the appealing aspects of linear types and the borrow checker, noting similarities to Rust but with a seemingly gentler learning curve. Some question the practical applicability of linear types for larger projects, while others anticipate its usefulness in specific domains like game development or embedded systems. A few commenters express skepticism about the limited standard library and the overall maturity of the project, but the overall tone is positive and curious about the language's potential. Performance, particularly relating to garbage collection or its lack thereof, is a recurring point of discussion, with some wondering about the potential for optimizations given the linear type system.
This blog post chronicles the author's weekend project of building a compiler for a simplified C-like language. It walks through the implementation of a lexical analyzer, parser (using recursive descent), and code generator targeting x86-64 assembly. The compiler handles basic arithmetic operations, variable declarations and assignments, if/else statements, and while loops. The post emphasizes simplicity and educational value over performance or completeness, providing a practical example of compiler construction principles in a digestible format. The code is available on GitHub for readers to explore and experiment with.
HN users largely praised the TinyCompiler project for its educational value, highlighting its clear code and approachable structure as beneficial for learning compiler construction. Several commenters discussed extending the compiler's functionality, such as adding support for different architectures or optimizing the generated code. Some pointed out similar projects or resources, like the "Let's Build a Compiler" tutorial and the Crafting Interpreters book. A few users questioned the "weekend" claim in the title, believing the project would take significantly longer for a novice to complete. The post also sparked discussion about the practical applications of such a compiler, with some suggesting its use for educational purposes or embedding in resource-constrained environments. Finally, there was some debate about the complexity of the compiler compared to more sophisticated tools like LLVM.
The F8 is a new 8-bit computer architecture designed for efficiency in both code size and memory usage, especially when programming in C. It aims to achieve performance comparable to 16-bit systems while maintaining the simplicity and resource efficiency of 8-bit designs. This is accomplished through features like a hybrid stack/register-based architecture, variable-width instructions, and dedicated instructions for common C operations like pointer manipulation and function calls. The F8 also emphasizes practical applications with features like a built-in bootloader and support for direct connection to peripherals.
Hacker News users discussed the F8 architecture's unusual design choices. Several commenters questioned the practical applications given the performance tradeoffs for memory efficiency, particularly with modern memory availability. Some debated the value of 8-bit architectures in niche applications like microcontrollers, while others pointed out existing alternatives like AVR. The unusual register structure and lack of hardware stack were also discussed, with some suggesting it might hinder C compiler optimization. A few expressed interest in the unique approach, though skepticism about real-world viability was prevalent. Overall, the comments reflected a cautious curiosity towards F8 but with reservations about its usefulness compared to established architectures.
Zeroperl leverages WebAssembly (Wasm) to create a secure sandbox for executing Perl code. It compiles a subset of Perl 5 to Wasm, allowing scripts to run in a browser or server environment with restricted capabilities. This approach enhances security by limiting access to the host system's resources, preventing malicious code from wreaking havoc. Zeroperl utilizes a custom runtime environment built on Wasmer, a Wasm runtime, and focuses on supporting commonly used Perl modules for tasks like text processing and bioinformatics. While not aiming for full Perl compatibility, Zeroperl offers a secure and efficient way to execute specific Perl workloads in constrained environments.
Hacker News commenters generally expressed interest in Zeroperl, praising its innovative approach to sandboxing Perl using WebAssembly. Some questioned the performance implications of this method, wondering if it would introduce significant overhead. Others discussed alternative sandboxing techniques, like using containers or VMs, comparing their strengths and weaknesses to WebAssembly. Several users highlighted potential use cases, particularly for serverless functions and other cloud-native environments. A few expressed skepticism about the viability of fully securing Perl code within WebAssembly given Perl's dynamic nature and CPAN module dependencies. One commenter offered a detailed technical explanation of why certain system calls remain accessible despite the sandbox, emphasizing the ongoing challenges inherent in securing dynamic languages.
OpenLDK is a project that implements a Java Virtual Machine (JVM) and Just-In-Time (JIT) compiler written entirely in Common Lisp. It aims to be a high-performance JVM alternative, leveraging Lisp's metaprogramming capabilities for dynamic code generation and optimization. The project features a modular design, encompassing a bytecode interpreter, a tiered JIT compiler using a method-based compilation strategy, and a garbage collector. OpenLDK is considered experimental and under active development, focusing on performance enhancements and broader Java compatibility.
Commenters on Hacker News express interest in OpenLDK, primarily focusing on its unusual implementation of a Java Virtual Machine (JVM) in Common Lisp. Several question the practical applications and performance implications of this approach, wondering about its speed and suitability for real-world projects. Some highlight the potential benefits of Lisp's dynamic nature for tasks like debugging and introspection. Others draw parallels to similar projects like Clojure and GraalVM, discussing their respective advantages and disadvantages. A few express skepticism about the long-term viability of the project, while others praise the technical achievement and express curiosity about its potential. The novelty of using Lisp for JVM implementation clearly sparks the most discussion.
The author details their process of creating a WebAssembly (Wasm) virtual machine (VM) written entirely in C. Driven by a desire for a lightweight, embeddable Wasm runtime for resource-constrained environments, they built the VM from scratch, implementing core features like the stack-based execution model, linear memory, and basic WebAssembly System Interface (WASI) support. The project focused on simplicity and understandability over performance, serving primarily as a learning exercise and a platform for experimentation with Wasm. The post walks through key aspects of the VM's design and implementation, including parsing the Wasm binary format, handling function calls, and managing memory. It also highlights the challenges faced and lessons learned during the development process.
Hacker News users generally praised the author's clear writing style and the educational value of the post. Several commenters discussed the project's performance, noting that it's not optimized for speed and suggesting potential improvements like just-in-time compilation. Some shared their own experiences with WASM interpreters and related projects, including comparisons to other implementations and alternative approaches like using a stack machine. Others appreciated the detailed explanation of the parsing and execution process, finding it helpful for understanding WASM internals. A few users pointed out minor corrections or areas for potential enhancement in the code, demonstrating active engagement with the technical details.
Mukul Rathi details his journey of creating a custom programming language, focusing on the compiler construction process. He explains the key stages involved, from lexing (converting source code into tokens) and parsing (creating an Abstract Syntax Tree) to code generation and optimization. Rathi uses his language, which he implements in OCaml, to illustrate these concepts, providing code examples and explanations of how each component works together to transform high-level code into executable machine instructions. He emphasizes the importance of understanding these foundational principles for anyone interested in building their own language or gaining a deeper appreciation for how programming languages function.
Hacker News users generally praised the article for its clarity and accessibility in explaining compiler construction. Several commenters appreciated the author's approach of building a complete, albeit simple, language instead of just a toy example. Some pointed out the project's similarity to the "Let's Build a Compiler" series, while others suggested alternative or supplementary resources like Crafting Interpreters and the LLVM tutorial. A few users discussed the tradeoffs between hand-written lexers/parsers and using parser generator tools, and the challenges of garbage collection implementation. One commenter shared their personal experience of writing a language and the surprising complexity of seemingly simple features.
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https://news.ycombinator.com/item?id=43185174
Hacker News users discussed the cleverness of using TypeScript's type system for computation, with several expressing fascination and calling it "amazing" or "brilliant." Some debated the practical applications, acknowledging its limitations while appreciating it as a demonstration of the type system's power. Concerns were raised about debugging complexity and the impracticality for larger programs. Others drew parallels to other Turing-complete type systems and pondered the potential for generating optimized WASM code from such TypeScript code. A few commenters pointed out the project's connection to the "ts-sql" project and speculated about leveraging similar techniques for compile-time query validation and optimization. Several users also highlighted the educational value of the project, showcasing the unexpected capabilities of TypeScript's type system.
The Hacker News post titled "MichiganTypeScript: A WebAssembly runtime implemented in TypeScript types" sparked a discussion with several interesting comments.
Many users expressed fascination and amusement at the project, highlighting the ingenuity and absurdity of implementing a Wasm runtime purely within TypeScript's type system. Some saw it as a clever demonstration of the power and flexibility of TypeScript's type system, pushing its boundaries beyond what might be considered practical. Others viewed it more as a playful experiment or a form of esoteric programming.
One commenter questioned the practical implications of the project, wondering about its potential use cases beyond being a proof of concept. This sparked a small thread discussing the potential for verifying Wasm modules at compile time or exploring new possibilities in type-level computation. However, the general consensus seemed to be that the project's primary value lies in its demonstration of the theoretical possibilities, rather than immediate practical applications.
Several users pointed out the similarities to other projects that explore the computational capabilities of type systems, particularly within languages like Idris and Haskell. This highlighted the connection between TypeScript's advanced type features and the concepts found in dependently-typed languages.
There was also some discussion regarding the performance and scalability of such an approach. Some commenters expressed skepticism about the feasibility of using this for real-world Wasm execution, anticipating potential performance bottlenecks.
A few users highlighted the educational value of the project, suggesting that it could be a useful tool for learning about both TypeScript's type system and the inner workings of Wasm.
Finally, some comments simply expressed amazement and appreciation for the creativity and technical skill demonstrated by the project's creators. Phrases like "mind-blowing," "absolutely bonkers," and "amazingly pointless" were used to capture the general sentiment of bewildered admiration.