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* move dummy_precision and epsilon to NumTraits

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* make NumTraits inherits std::numeric_limits
This commit is contained in:
Gael Guennebaud
2010-02-10 10:52:28 +01:00
parent c11df02f0d
commit fe0827495a
34 changed files with 108 additions and 103 deletions
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20
Eigen/src/Core/NumTraits.h
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@@ -49,6 +49,7 @@
template<typename T> struct NumTraits;
template<> struct NumTraits<int>
: std::numeric_limits<int>
{
typedef int Real;
typedef double FloatingPoint;
@@ -60,9 +61,12 @@ template<> struct NumTraits<int>
AddCost = 1,
MulCost = 1
};
inline static int dummy_precision() { return 0; }
};
template<> struct NumTraits<float>
: std::numeric_limits<float>
{
typedef float Real;
typedef float FloatingPoint;
@@ -74,9 +78,12 @@ template<> struct NumTraits<float>
AddCost = 1,
MulCost = 1
};
inline static float dummy_precision() { return 1e-5f; }
};
template<> struct NumTraits<double>
: std::numeric_limits<double>
{
typedef double Real;
typedef double FloatingPoint;
@@ -88,9 +95,12 @@ template<> struct NumTraits<double>
AddCost = 1,
MulCost = 1
};
inline static double dummy_precision() { return 1e-12; }
};
template<typename _Real> struct NumTraits<std::complex<_Real> >
: std::numeric_limits<std::complex<_Real> >
{
typedef _Real Real;
typedef std::complex<_Real> FloatingPoint;
@@ -102,9 +112,13 @@ template<typename _Real> struct NumTraits<std::complex<_Real> >
AddCost = 2 * NumTraits<Real>::AddCost,
MulCost = 4 * NumTraits<Real>::MulCost + 2 * NumTraits<Real>::AddCost
};
inline static Real epsilon() { return std::numeric_limits<Real>::epsilon(); }
inline static Real dummy_precision() { return NumTraits<Real>::dummy_precision(); }
};
template<> struct NumTraits<long long int>
: std::numeric_limits<long long int>
{
typedef long long int Real;
typedef long double FloatingPoint;
@@ -119,6 +133,7 @@ template<> struct NumTraits<long long int>
};
template<> struct NumTraits<long double>
: std::numeric_limits<long double>
{
typedef long double Real;
typedef long double FloatingPoint;
@@ -130,9 +145,12 @@ template<> struct NumTraits<long double>
AddCost = 1,
MulCost = 1
};
static inline long double dummy_precision() { return NumTraits<double>::dummy_precision(); }
};
template<> struct NumTraits<bool>
: std::numeric_limits<bool>
{
typedef bool Real;
typedef float FloatingPoint;
@@ -144,6 +162,8 @@ template<> struct NumTraits<bool>
AddCost = 1,
MulCost = 1
};
inline static bool dummy_precision() { return 0; }
};
#endif // EIGEN_NUMTRAITS_H