Styx 是一个语法扫描器和解析器的生成器，主要为了解决传统的 lex/yacc 的一个不足。
It has unique features like automatic derivation of depth grammar, production of the derivation tree including it’s C interface which provides access to the abstract syntax tree, preservation of full source information and pretty printing to facilitate source-source translation, persistence to aid rapid interpreter writing.
