all, here is the gramma:
全部,这是语法:
columnName (',' columnName)* -> ^(SM_TOK columnName)
columnName(','columnName)* - > ^(SM_TOK columnName)
I want the output ast of "A,B" to have multiple SM_TOK nodes , like : (SM_TOK A) (SM_TOK B)
我希望“A,B”的输出ast有多个SM_TOK节点,如:(SM_TOK A)(SM_TOK B)
But,currently,I only have: (SM_TOK A)
但是,目前,我只有:(SM_TOK A)
It seems that 'B' will be ignored.
似乎'B'将被忽略。
Can anyone help me to fix this gramma?
任何人都可以帮我修复这个语法吗?
Thanks!
1 个解决方案
#1
2
Your left side specifies one or more columnName items, but the right side mentions only one. Try adding a +, like this:
您的左侧指定了一个或多个columnName项,但右侧仅提到一个。尝试添加+,如下所示:
columnName (',' columnName)* -> ^((SM_TOK columnName)+)
#1
2
Your left side specifies one or more columnName items, but the right side mentions only one. Try adding a +, like this:
您的左侧指定了一个或多个columnName项,但右侧仅提到一个。尝试添加+,如下所示:
columnName (',' columnName)* -> ^((SM_TOK columnName)+)