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ratio (ratio_less): Add comments.

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2011-03-02  Marc Glisse  <marc.glisse@normalesup.org>

	* include/std/ratio (ratio_less): Add comments.

From-SVN: r170617
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Marc Glisse 2011-03-02 15:06:00 +00:00 committed by Paolo Carlini
parent 8fddbce4ab
commit a7443a2dd6
2 changed files with 8 additions and 0 deletions
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4
libstdc++-v3/ChangeLog
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@ -1,3 +1,7 @@
2011-03-02 Marc Glisse <marc.glisse@normalesup.org>
* include/std/ratio (ratio_less): Add comments.
2011-03-02 Marc Glisse <marc.glisse@normalesup.org>
PR libstdc++/47913

4
libstdc++-v3/include/std/ratio
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@ -279,10 +279,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ };
// 0 <= _Ri < 1
// If one is 0, conclude
// Otherwise, x < y iff 1/y < 1/x
template<typename _R1, typename _R2>
struct __ratio_less_impl_2;
// _Ri > 0
// Compare the integral parts, and remove them if they are equal
template<typename _R1, typename _R2, intmax_t __q1 = _R1::num / _R1::den,
intmax_t __q2 = _R2::num / _R2::den, bool __eq = (__q1 == __q2)>
struct __ratio_less_impl_1
@ -338,6 +341,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{ };
/// ratio_less
// using a continued fraction expansion
template<typename _R1, typename _R2>
struct ratio_less
: __ratio_less_impl<_R1, _R2>::type