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We investigated reactions for this library. It is appeared that includuding header files and running `expander.py` needs the knowledge about PC. We should provide the everything combined header file so...

Can we use the test cases in the `test/` folder as the tests of foreign-language port of this library? If possible, under what license shall we use?

Using the ["#line" directives](https://gcc.gnu.org/onlinedocs/cpp/Line-Control.html), it's possible to allow compilers to report line numbers from the original source file. At least GCC and Clang support this. It's useful for tracing the...

Tested: https://atcoder.jp/contests/practice2/submissions/45976337

It can be useful if you want something like: ``` mint x; // ... if (x) do_sth(x); ```

An rvalue reference passed to a function is a lvalue inside the function, and still requires `move()` to mark it as an rvalue when passing to other functions. A demo...

Line 29 of `lazysegtree.hpp` should be `"mapping must work as S(F, S)");`