"Its front-end is written from scratch to closely follow the C11 standard, including a parser that follows the C11 standard grammar, and a typechecker." C fron

"Its front-end is written from scratch to closely follow the C11 standard, including a parser that follows the C11 standard grammar, and a typechecker." C front-end written from scratch sounds interesting. I cannot find the code for this front-end anywhere. Has anyone found it somewhere or maybe it's not released yet?