This patch adds CONSTEXPR to constructors and operators in machmode.h,
excluding the controversial constexpr-resistant "() {}" constructors,
which would become "= default" if we required C++11.
Some of the other routines could potentially be constexpr too,
but that can be done on an as-needed basis.
2019-10-07 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* machmode.h (opt_mode): Mark constructors with CONSTEXPR.
(pod_mode): Mark operators likewise.
(scalar_int_mode): Mark non-default constructors and
operators with CONSTEXPR.
(scalar_float_mode, scalar_mode, complex_mode): Likewise.
(fixed_size_mode): Likewise.
From-SVN: r276649
