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libstdc++: Fix constant expressions in std::uniform_int_distribution

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Clang and EDG say the class member access expressions __urng.min() and
__urng.max() are not constant expressions, because the object expression
__urng is not usable in a constant expresion. Use a qualified-id to call
those static member functions instead.

Co-authored-by: Stephan Bergmann <sbergman@redhat.com>

libstdc++-v3/ChangeLog:

	* include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
	Use qualified-id to refer to static member functions.
This commit is contained in:
Jonathan Wakely 2020-11-04 10:36:45 +00:00
parent 10a50d261e
commit 24366207b7
1 changed files with 4 additions and 4 deletions
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8
libstdc++-v3/include/bits/uniform_int_dist.h
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@ -278,12 +278,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
typedef typename make_unsigned<result_type>::type __utype;
typedef typename common_type<_Gresult_type, __utype>::type __uctype;
static_assert( __urng.min() < __urng.max(),
constexpr __uctype __urngmin = _UniformRandomBitGenerator::min();
constexpr __uctype __urngmax = _UniformRandomBitGenerator::max();
static_assert( __urngmin < __urngmax,
"Uniform random bit generator must define min() < max()");
constexpr __uctype __urngmin = __urng.min();
constexpr __uctype __urngmax = __urng.max();
constexpr __uctype __urngrange = __urngmax - __urngmin;
const __uctype __urange
= __uctype(__param.b()) - __uctype(__param.a());