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Add template alias emulation to <ratio> 

llvm-svn: 120098
This commit is contained in:
Howard Hinnant 2010-11-24 17:05:06 +00:00
parent 8ad3b25633
commit 0c6a0fe7fb
1 changed files with 37 additions and 8 deletions
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45
libcxx/include/ratio
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@ -23,13 +23,14 @@ class ratio
public:
static const intmax_t num;
static const intmax_t den;
typedef ratio<num, den> type;
};
// ratio arithmetic
template <class R1, class R2> struct ratio_add;
template <class R1, class R2> struct ratio_subtract;
template <class R1, class R2> struct ratio_multiply;
template <class R1, class R2> struct ratio_divide;
template <class R1, class R2> using ratio_add = ...;
template <class R1, class R2> using ratio_subtract = ...;
template <class R1, class R2> using ratio_multiply = ...;
template <class R1, class R2> using ratio_divide = ...;
// ratio comparison
template <class R1, class R2> struct ratio_equal;
@ -260,7 +261,7 @@ typedef ratio< 1000000000000000LL, 1LL> peta;
typedef ratio<1000000000000000000LL, 1LL> exa;
template <class _R1, class _R2>
struct _LIBCPP_VISIBLE ratio_multiply
struct __ratio_multiply
{
private:
static const intmax_t __gcd_n1_d2 = __static_gcd<_R1::num, _R2::den>::value;
@ -274,7 +275,14 @@ public:
};
template <class _R1, class _R2>
struct _LIBCPP_VISIBLE ratio_divide
struct _LIBCPP_VISIBLE ratio_multiply
: public __ratio_multiply<_R1, _R2>::type
{
typedef typename __ratio_multiply<_R1, _R2>::type type;
};
template <class _R1, class _R2>
struct __ratio_divide
{
private:
static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;
@ -288,7 +296,14 @@ public:
};
template <class _R1, class _R2>
struct _LIBCPP_VISIBLE ratio_add
struct _LIBCPP_VISIBLE ratio_divide
: public __ratio_divide<_R1, _R2>::type
{
typedef typename __ratio_divide<_R1, _R2>::type type;
};
template <class _R1, class _R2>
struct __ratio_add
{
private:
static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;
@ -310,7 +325,14 @@ public:
};
template <class _R1, class _R2>
struct _LIBCPP_VISIBLE ratio_subtract
struct _LIBCPP_VISIBLE ratio_add
: public __ratio_add<_R1, _R2>::type
{
typedef typename __ratio_add<_R1, _R2>::type type;
};
template <class _R1, class _R2>
struct __ratio_subtract
{
private:
static const intmax_t __gcd_n1_n2 = __static_gcd<_R1::num, _R2::num>::value;
@ -331,6 +353,13 @@ public:
>::type type;
};
template <class _R1, class _R2>
struct _LIBCPP_VISIBLE ratio_subtract
: public __ratio_subtract<_R1, _R2>::type
{
typedef typename __ratio_subtract<_R1, _R2>::type type;
};
// ratio_equal
template <class _R1, class _R2>