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Bug 1338374 - Make tl::Min/Max variadic. r=froydnj

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--HG--
extra : rebase_source : 140441135e9ee1fcde0541e39a19e1a5c47203c8
This commit is contained in:
Jeff Walden 2017-01-30 15:56:05 -08:00
parent 318b206490
commit 1811cee01b
1 changed files with 23 additions and 4 deletions
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27
mfbt/TemplateLib.h
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@ -27,15 +27,34 @@ namespace mozilla {
namespace tl {
/** Compute min/max. */
template<size_t I, size_t J>
template<size_t Size, size_t... Rest>
struct Min
{
static const size_t value = I < J ? I : J;
static constexpr size_t value =
Size < Min<Rest...>::value
? Size
: Min<Rest...>::value;
};
template<size_t I, size_t J>
template<size_t Size>
struct Min<Size>
{
static constexpr size_t value = Size;
};
template<size_t Size, size_t... Rest>
struct Max
{
static const size_t value = I > J ? I : J;
static constexpr size_t value =
Size > Max<Rest...>::value
? Size
: Max<Rest...>::value;
};
template<size_t Size>
struct Max<Size>
{
static constexpr size_t value = Size;
};
/** Compute floor(log2(i)). */