Hi everyone,
I have two questions about the following code, which attempts to parse
length-prefixed strings using the proposed Boost.Parser:
```
std::string input = "[5]HELLO[5]WORLD";
unsigned int size = 0;
auto action = [&size](auto & ctx) { size = bp::_attr(ctx); };
auto lps_parser = '[' >> bp::uint_[action] >> ']' >>
bp::repeat(std::ref(size))[bp::char_];
auto result = bp::parse(input, *lps_parser);
```
1. Is it possible to eliminate the need for the action and size
variable by using some kind of placeholder in bp::repeat that utilizes
the attribute of the first parser?
2. How can we make this part of the parser more efficient:
bp::repeat(std::ref(size))[bp::char_]
The current implementation seems to loop and execute bp::char_ parser
on each character, while all it needs to do is chunk a portion of the
input string.
Regards,
Mohammad Nejati
