Solang - A new Solidity to Wasm compiler written in Rust

"This is solang, a new proof of concept solidity compiler. The existing solidity compiler is a huge C++ code base which implements its own parser, optimizer and handling of binary files. The idea here is that we use standard tooling like a parser generator, llvm for its optimizer and handling of wasm binary files and use rust. As result, only the compiler frontend needs to be written. This will be a much smaller codebase which is hopefully more maintainable than the existing solidity compiler. In addition we will have a solidity compiler which supports wasm, which allows the ethereum community to move away from the EVM. This, in turn, allows us to improve the solidity language in ways not easily implemented in EVM, like string concatenation or string formatting. page

Also see WASI: WebAssembly System Interface.