Dotcl：.NET 上的 Common Lisp 实现

Dotcl：.NET 上的 Common Lisp 实现
Dotcl: Common Lisp Implementation on .NET

## dotcl: .NET 上的 Common Lisp dotcl 是一个基于 .NET 运行时的 Common Lisp 实现，可在 Windows、macOS 和 Linux (x86-64 & ARM64) 上实现跨平台执行，无需特定平台的移植。它将 Lisp 代码编译为 CIL (通用中间语言)，并且在很大程度上符合 ANSI Common Lisp 标准。主要特性包括 **在 .NET 应用程序 (C#, F#, VB.NET) 中无缝嵌入 Lisp** 以及使用 `dotnet:` 包 **用 Lisp 编写 .NET 代码**，以便直接访问 .NET 类型和类。 dotcl 利用 NuGet 生态系统，并与许多 Quicklisp 库兼容。它通过使用 Roswell/SBCL 的交叉编译过程进行引导，但随后可以 **自托管** 以进行后续构建。演示项目展示了 Lisp 与 .NET MAUI、ASP.NET Core、MonoGame 的集成，甚至通过模型上下文协议公开 Lisp REPL。该项目是开源的 (MIT 许可证)，并提供关于架构、设计决策和平台特定考虑因素的详细文档。

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原文

Common Lisp implementation on .NET. Lisp source is compiled to CIL (Common Intermediate Language) and runs on the .NET JIT — so the same Lisp image runs on Windows, macOS, and Linux across x86-64 and ARM64 without per-platform porting work.

Broadly conforms to the ANSI Common Lisp standard — verified against the ansi-test suite.

Embedding Common Lisp in .NET applications. dotcl.runtime is a regular .NET library; you load it from any C# / F# / VB.NET project, evaluate Lisp code, and call back and forth.
Writing .NET code in Lisp. The dotnet: package gives direct access to .NET types: (dotnet:new "System.Text.StringBuilder"), (dotnet:invoke sb "Append" "x"), (dotnet:static "System.Math" "Sin" 1.0). You can subclass .NET types from Lisp via dotnet:define-class — the compiler emits real .NET classes, so frameworks like MAUI, ASP.NET Core, and MonoGame just see them as ordinary subclasses.
Cross-platform CL with NuGet ecosystem access. Any NuGet package is reachable from Lisp; any Quicklisp library that doesn't rely on SBCL-only internals tends to work too (asdf, alexandria, etc. are routinely loaded).

# One-time bootstrap: cross-compile dotcl's compiler with Roswell/SBCL.
make cross-compile

# Install as a `dotnet tool`-style global command.
make install

# REPL
dotcl repl

# Evaluate a form
dotcl --eval "(format t \"hello, ~a~%\" (lisp-implementation-type))"

# Run a file
dotcl --load my-program.lisp

After the first cross-compile, dotcl can self-host: DOTCL_LISP=dotcl make cross-compile rebuilds the compiler using dotcl itself.

.NET SDK 10+ — see install table below
Roswell (only for the initial cross-compile bootstrap — once dotcl is built it can rebuild itself)

Working integrations in samples/:

MauiLispDemo — a .NET MAUI app (Windows + Android) where Application / ContentPage / view model are all defined in Lisp via dotnet:define-class.
AspNetLispDemo — ASP.NET Core controller written in Lisp, with attribute routing.
MonoGameLispDemo — Game subclass in Lisp; the Draw override runs on the MonoGame frame loop and animates the background colour.
McpServerDemo — Model Context Protocol server exposing a Lisp REPL to MCP clients (Claude Desktop, etc.).

Each sample's README.md walks through the boot pattern.

Compiler (compiler/, written in Lisp): transforms S-expressions into a flat list of CIL instructions (SIL).
Runtime (runtime/, written in C#): object representation, reader, CIL assembler (PersistedAssemblyBuilder-based for .fasl output and Reflection.Emit for in-memory codegen), and the standard library functions that aren't expressible in pure Lisp.
Bootstrap is by cross-compile: a Roswell SBCL runs compiler/cil-compile.lisp to emit compiler/cil-out.sil, which the .NET runtime loads to bring up the Lisp environment. From that point dotcl can rebuild itself.

Architectural detail and design history are in DESIGN.md. Per-change rationale is recorded under docs/decisions/.

Windows: see docs/windows.md for installation, encoding (UTF-8 stdin/stdout always), pathname conventions, and Windows-side .NET interop (Registry / WMI / WinForms / MAUI / COM).

MIT. See LICENSE.

Dotcl：.NET 上的 Common Lisp 实现 Dotcl: Common Lisp Implementation on .NET

Dotcl：.NET 上的 Common Lisp 实现
Dotcl: Common Lisp Implementation on .NET