Evan Miller 6172b5203a Reduce unwanted double promotions #398 ...

A small audit of the Bessel and beta functions revealed a number of
places where primitive functions were being called without a Policy
argument, thus introducing double- and float-promotion in violation
of the user-provided policy. The primitive functions in question
include cbrt, cos_pi, sin_pi, lgamma, tgamma, and polygamma.

This commit passes the Policy argument down the call chain in several
locations. As part of this work, a number of internal functions have had
a Policy argument added to them. These functions include:

* airy_ai_zero_detail::initial_guess
* airy_bi_zero_detail::initial_guess
* airy_zero::equation_as_10_4_105
* binomial_ccdf (in special_functions/beta.hpp)
* bessel_zero::asymptotic_bessel_j_large_x_2
* bessel_zero::asymptotic_bessel_y_large_x_2
* bessel_zero::equation_as_9_5_26
* bessel_zero::cyl_neumann_zero_detail::equation_nist_10_21_40_a
* bessel_zero::cyl_neumann_zero_detail::equation_nist_10_21_40_b

The above functions do not have any user-facing documentation, and so
I did not preserve their non-policy function signatures.

I do not know of a good way to verify the absence of float-promotion
deep down a call chain, and so I have not added any new tests. The
existing tests in the special_fun and distribution_tests suites continue
to pass.

2020-07-09 12:21:33 -04:00

..

boost

Reduce unwanted double promotions #398

2020-07-09 12:21:33 -04:00