[Bug libstdc++/91156] The associated Laguerre polynomial should allow negative arguments.

[emsr at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91156

emsr at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|9.0                         |10.0
           Severity|normal                      |enhancement

--- Comment #4 from emsr at gcc dot gnu.org ---
N.B. This 'bug' and the patches apply both to the 'regular' Laguerre polynomial
laguerre(n,x) and to the associated Laguerre polynomial assoc_laguerre(n,m,x).

Note that this gets rid of a throw or two.  The mandated special function
throws should become preconditions anyway. Later.

Furthermore, if the not-so-special functions like pow, exp, sin, etc. can be
constexpr then these can be too. Later.