https://github.com/T-Brick/lean2wasm

Tool for compiling Lean to WASM
https://github.com/T-Brick/lean2wasm

lean lean4 wasm

Last synced: 23 days ago
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Tool for compiling Lean to WASM

• Host: GitHub
• URL: https://github.com/T-Brick/lean2wasm
• Owner: T-Brick
• License: mit
• Created: 2023-12-12T22:03:48.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2024-03-17T22:16:26.000Z (9 months ago)
• Last Synced: 2024-08-10T14:11:57.484Z (4 months ago)
• Topics: lean, lean4, wasm
• Language: Lean
• Homepage:
• Size: 12.7 KB
• Stars: 12
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Lean2Wasm

Tool to compile Lean4 code to WASM. Right now this is really just for me to test

things out. So actually using it is a little scuffed right now :)

This is largely a translation of [these instructions](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/wasm.20build/near/402692669)

into something that can be executed.

This requires [emcc](https://emscripten.org/docs/getting_started/downloads.html)

to already be installed.

## Usage

Run `lake build test` to build the test program. Then run `lake build` to build

the utility. Running `lake exe lean2wasm` will compile the `Main` program.

Once compiled, you can run `node .lake/build/wasm/main.js` to run the program.

Alternatively you can use `lake run js`.

If you want to change what is being compiled, in `Lean2Wasm.lean` just change

the `root` variable.

## Example

[Here](https://github.com/T-Brick/c0_web_driver) is an example of embedding lean

into a webpage. Importantly, we have to use the `MODULARIZE` flag so that we

can invoke the `main` function multiple times since there are issues with doing

so without resetting the emscripten runtime (specifically, emscripten generates

a factory function which can then be invoked to initialise the runtime again

and call `main`).