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maths: reduce template verbosity

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This commit is contained in:
Danny Robson 2015-11-13 18:00:15 +11:00
parent 8f806b5fa8
commit 5a26793b0a
2 changed files with 29 additions and 19 deletions
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6
maths.cpp
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@ -117,9 +117,11 @@ digits (const uint32_t &v) {
///////////////////////////////////////////////////////////////////////////////
template <typename T>
T
std::enable_if_t<
std::is_integral<T>::value, T
>
round_pow2 (T value) {
typedef typename std::enable_if<std::is_integral<T>::value, T>::type return_type;
using return_type = std::enable_if_t<std::is_integral<T>::value, T>;
--value;

42
maths.hpp
View File

@ -112,33 +112,41 @@ round_to (T value, U size)
//-----------------------------------------------------------------------------
template <typename T>
T
std::enable_if_t<
std::is_integral<T>::value, T
>
round_pow2 (T value);
//-----------------------------------------------------------------------------
template <typename T, typename U>
constexpr T
constexpr std::enable_if_t<
std::is_integral<T>::value &&
std::is_integral<U>::value,
T
>
divup (const T a, const U b)
{ return (a + b - 1) / b; }
{
return (a + b - 1) / b;
}
///////////////////////////////////////////////////////////////////////////////
// Properties
template <typename T>
bool
is_integer (const T& value);
is_integer (const T& value);
//-----------------------------------------------------------------------------
template <typename T>
unsigned
digits (const T& value);
digits (const T& value);
//-----------------------------------------------------------------------------
constexpr int sign (int);
constexpr float sign (float);
constexpr int sign (int);
constexpr float sign (float);
constexpr double sign (double);
@ -364,11 +372,11 @@ namespace util {
//-------------------------------------------------------------------------
template <typename T, typename U, typename ...Args>
constexpr typename std::enable_if<
std::is_unsigned<typename std::decay<T>::type>::value == std::is_unsigned<typename std::decay<U>::type>::value &&
std::is_integral<typename std::decay<T>::type>::value == std::is_integral<typename std::decay<U>::type>::value,
typename std::common_type<T,U>::type
>::type
constexpr std::enable_if_t<
std::is_unsigned<std::decay_t<T>>::value == std::is_unsigned<std::decay_t<U>>::value &&
std::is_integral<std::decay_t<T>>::value == std::is_integral<std::decay_t<U>>::value,
std::common_type_t<T,U>
>
min (const T a, const U b, Args ...args)
{
return min (a < b ? a : b, std::forward<Args> (args)...);
@ -385,11 +393,11 @@ namespace util {
//-------------------------------------------------------------------------
template <typename T, typename U, typename ...Args>
constexpr typename std::enable_if<
std::is_unsigned<typename std::decay<T>::type>::value == std::is_unsigned<typename std::decay<U>::type>::value &&
std::is_integral<typename std::decay<T>::type>::value == std::is_integral<typename std::decay<U>::type>::value,
typename std::common_type<T,U>::type
>::type
constexpr std::enable_if_t<
std::is_unsigned<std::decay_t<T>>::value == std::is_unsigned<std::decay_t<U>>::value &&
std::is_integral<std::decay_t<T>>::value == std::is_integral<std::decay_t<U>>::value,
std::common_type_t<T,U>
>
max (const T a, const U b, Args ...args)
{
return max (a > b ? a : b, std::forward<Args> (args)...);