How do I capture each substring at run time about pegtl HOT 3 CLOSED

OK, I know what to do. I'll use parse_tree and rewrite transform to complete
thank you

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ActionInput need const std::vector<ActionInput>& get_childs_input() and const ActionInput& get_parent_input() method How can i do ?

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I don't want to write many applys.

Implementing many actions might be inevitable. Unless you add some intermediate layer, which could also be the parse tree from tao/pegtl/contrib/parse_tree.hpp.

Is there a ready-made capture list?
ActionInput need const std::vector<ActionInput>& get_childs_input()

That would require additional book-keeping which would be rather costly if it automatically kept the capture of every sub-rule. This cost should only be paid when and where necessary.

You might be able to set up some vector in the states, and a simple action that gets applied to multiple rules that merely pushes some information on to the vector, and then do all the actual processing in the action for the enclosing rule.

and const ActionInput& get_parent_input() method. How can i do?

I don't get the intended semantics. What should get_parent_input() return?

Btw, the default case of check_action< Rule > should use tao::pegtl::nothing< Rule > as public base class.

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