gforth

For contrast, gforth (a prominent Forth interpreter, by Forth standards) generates+compiles+links binding code in C, at runtime, using the ordinary C toolchain. [0][1][2] A bit 'out there' you may say, but on the plus side this approach enables handling header files and tidily expressing bindings without the need to implement their own C parser. [2] [0] GitHub mirror: https://github.com/forthy42/gforth/blob/dda77d851ddeb80ca849... [1] The official host: https://git.savannah.gnu.org/cgit/gforth.git/tree/libcc.fs [2] https://rosettacode.org/wiki/Call_a_foreign-language_functio...

There's another parser generator written in Forth, that I have personally used myself: Gray [1-3] The zip file [1] has english documentation, the papers [2,3] are unfortunately only available in german. This [4] is a mostly working grammar for the Verilog language written using Gray. It uses a lexer that sits on top of Gforth's regexp [5] package that directly compiles regexps into forth code (BTW quite a few bugs in the regexp package were triggered by the lexer and subsequently fixed upstream). [1] http://www.complang.tuwien.ac.at/forth/gray4.zip [2] http://www.complang.tuwien.ac.at/papers/ertl89.ps.gz [3] http://www.complang.tuwien.ac.at/papers/ertl97.ps.gz [4] https://sourceforge.net/p/fourhdl/code/HEAD/tree/trunk/parse... [5] https://github.com/forthy42/gforth/blob/master/regexp.fs

I think it's single-threaded synchronous. https://github.com/urlysses/1991/blob/1991/1991.fs#L469 https://github.com/forthy42/gforth/blob/master/unix/socket.f...