这是一个跟YACC兼容的解析器生成器
Bison 2.6.2 发布，主要改进记录：
1. Generated headers are now guarded against multiple inclusion.
2. A new variable "api.prefix" has been introduced to replace "%name-prefix".
3. Warnings for stray "@" or "$" in actions have been expanded.
4. Creation of spurious whitespace and empty lines is now avoided.
5. Various further minor fixes and improvements have been made.
主页：http://dinosaur.compilertools.net/
下载：ftp://prep.ai.mit.edu/pub/gnu/
来自:开源中国社区
