idStr myString = "Hello, world!"; const char* myCString = myString.c_str();This code creates an `idStr` object `myString` containing the string "Hello, world!" and then creates a const char pointer `myCString` that points to a null-terminated C-style string representation of `myString` using the `c_str()` method. This library is part of the idTech game engines and is not part of a separate package library.