一句话：提出 Turnstile+：用宏实现依赖类型系统的高层元 DSL，支持快速原型化依赖类型语言与证明助手扩展。
本文提出 Turnstile+，一个基于宏的高层元 DSL，用于构建依赖类型语言。其动机是依赖类型语言及其新特性的设计与实现通常繁重，难以快速原型和迭代。Turnstile+ 采用语言导向编程，将依赖类型系统实现为宏，使程序员能快速试验新的依赖类型特性与扩展，或定制领域专属的依赖类型 DSL；同时支持相互作用的组件系统，如证明助手及其配套 DSL。论文介绍了实现细节，并展示该框架可用于构造从带索引类型的轻量语言到完整证明助手（含 tactic 系统、sized types 和 SMT 交互等扩展）的多种依赖类型语言。
We present Turnstile+, a high-level, macros-based metaDSL for building dependently typed languages. With it, programmers may rapidly prototype and iterate on the design of new dependently typed features and extensions. Or they may create entirely new DSLs whose dependent type ``power'' is tailored to a specific domain. Our framework's support of language-oriented programming also makes it suitable for experimenting with systems of interacting components, e.g., a proof assistant and its companion DSLs. This paper explains the implementation details of Turnstile+, as well as how it may be used to create a wide-variety of dependently typed languages, from a lightweight one with indexed types, to a full spectrum proof assistant, complete with a tactic system and extensions for features like sized types and SMT interaction.
@article{paperbot517,
title = {Dependent type systems as macros},
author = {Stephen Chang and Michael Ballantyne and Milo Turner and William J. Bowman},
journal = {Proceedings of the ACM on Programming Languages},
volume = {4},
number = {POPL},
year = {2019},
doi = {10.1145/3371071}
}