[1] rbuckton/grammarkdown: Markdown-like DSL for defining grammatical syntax for programming languages. () https://github.com/rbuckton/grammarkdown

grammarkdown is a markdown-style parser for syntactic grammars, designed to make it easily to rapidly prototype a grammar and statically verify its consistency. The grammar supported by grammarkdown is based on the parametric grammar used by ECMA-262 (the JavaScript language standard).