本文整理汇总了C++中default_ops::eval_is_zero方法的典型用法代码示例。如果您正苦于以下问题：C++ default_ops::eval_is_zero方法的具体用法？C++ default_ops::eval_is_zero怎么用？C++ default_ops::eval_is_zero使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类default_ops的用法示例。
在下文中一共展示了default_ops::eval_is_zero方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: eval_divide
inline void eval_divide(rational_adapter<IntBackend>& result, const rational_adapter<IntBackend>& o)
{
using default_ops::eval_is_zero;
if(eval_is_zero(o))
{
BOOST_THROW_EXCEPTION(std::overflow_error("Divide by zero."));
}
result.data() /= o.data();
}示例2: generic_interconvert
void generic_interconvert(To& to, const From& from, const mpl::int_<number_kind_integer>& /*to_type*/, const mpl::int_<number_kind_integer>& /*from_type*/)
{
using default_ops::eval_get_sign;
using default_ops::eval_bitwise_and;
using default_ops::eval_convert_to;
using default_ops::eval_right_shift;
using default_ops::eval_left_shift;
using default_ops::eval_bitwise_or;
using default_ops::eval_is_zero;
// smallest unsigned type handled natively by "From" is likely to be it's limb_type:
typedef typename canonical<unsigned char, From>::type limb_type;
// get the corresponding type that we can assign to "To":
typedef typename canonical<limb_type, To>::type to_type;
From t(from);
bool is_neg = eval_get_sign(t) < 0;
if(is_neg)
t.negate();
// Pick off the first limb:
limb_type limb;
limb_type mask = static_cast<limb_type>(~static_cast<limb_type>(0));
From fl;
eval_bitwise_and(fl, t, mask);
eval_convert_to(&limb, fl);
to = static_cast<to_type>(limb);
eval_right_shift(t, std::numeric_limits<limb_type>::digits);
//
// Then keep picking off more limbs until "t" is zero:
//
To l;
unsigned shift = std::numeric_limits<limb_type>::digits;
while(!eval_is_zero(t))
{
eval_bitwise_and(fl, t, mask);
eval_convert_to(&limb, fl);
l = static_cast<to_type>(limb);
eval_right_shift(t, std::numeric_limits<limb_type>::digits);
eval_left_shift(l, shift);
eval_bitwise_or(to, l);
shift += std::numeric_limits<limb_type>::digits;
}
//
// Finish off by setting the sign:
//
if(is_neg)
to.negate();
}示例3: eval_is_zero
inline bool eval_is_zero(const rational_adapter<IntBackend>& val)
{
return eval_is_zero(val.data().numerator().backend());
}