简单的字符串通过Bison/Yacc中的节点传递

问题描述

我必须在yacc文件的语义规则中连接字符串:

I have to concatenate strings in semantic rules of my yacc file:

%union {
  stringstream sstream;
}
%type<sstream> node1 node2

---

node1
: node2 { $$ << $1 << " goodbye" }

node2
: final { $$ << "hello" }

但是，由于在联合中不允许使用stringstream甚至string，所以我找不到任何简单的方法来混合char *，int并使节点传输我可以在任何地方操纵的字符串.我该怎么办?

However, as stringstream or even string are not allowed in unions, I don't find any easy way to mix char *, int, and make nodes transport a string that I can manipulate everywhere.How should I do it ?

推荐答案

我不记得bison/yacc的详细信息，但是您可以使用指针和new.只要记住delete，如果bison/yacc给您机会.

I don't remember bison/yacc details, but you sure can use pointer and new it. Just remember to delete if bison/yacc gives you the opportunity.

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