parsing - 我如何告诉 Bison 我也期待减少-减少冲突？

Question

我的 C# 风格的玩具语法现在有了第一个归约-归约冲突!我为自己感到骄傲。

不过，这对我来说似乎没问题(我当时关闭了 GLR 解析器)。问题是，虽然我知道 %expect 指令可以让 Bison 关于移位/归约冲突闭嘴，但我找不到与归约/归约冲突等效的指令。那么我应该用什么来让它对我的 3 次类次/减少和我的 2 次减少/减少保持沉默？

Answer 1

来自 GNU Bison 文档，found here

For normal LALR(1) parsers, reduce/reduce conflicts are more serious, and should be eliminated entirely. Bison will always report reduce/reduce conflicts for these parsers. With GLR parsers, however, both kinds of conflicts are routine; otherwise, there would be no need to use GLR parsing. Therefore, it is also possible to specify an expected number of reduce/reduce conflicts in GLR parsers, using the declaration:

 %expect-rr n