af0d731b12
Implementing the Hermite polynomials which are part of C++17's mathematical special functions. The goal is to get early feedback which will make implementing the other functions easier. Integration of functions in chunks (e.g. `std::hermite` at first, then `std::laguerre`, etc.) might make sense as well (also see note on boost.math below). I started out from this abandoned merge request: https://reviews.llvm.org/D58876 . The C++23 standard defines them in-terms of `/* floating-point type */` arguments. I have not looked into that. Note, there is still an ongoing discussion on discourse whether importing boost.math is an option.
The "module partitions" for the std module
The files in this directory contain the exported named declarations per header. These files are used for the following purposes:
- During testing exported named declarations are tested against the named declarations in the associated header. This excludes reserved names; they are not exported.
- Generate the module std.
These use cases require including the required headers for these "partitions" at different locations. This means the user of these "partitions" are responsible for including the proper header and validating whether the header can be loaded in the current libc++ configuration. For example "include " fails when locales are not available. The "partitions" use the libc++ feature macros to export the declarations available in the current configuration. This configuration is available if the user includes the `__config' header.
We use .inc files that we include from the top-level module instead of
using real C++ module partitions. This is a lot faster than module partitions,
see this for details.