42#ifndef _TEUCHOS_SCALARTRAITS_DECL_HPP_
43#define _TEUCHOS_SCALARTRAITS_DECL_HPP_
59 static inline T notDefined() {
return T::this_type_is_missing_a_specialization(); }
Teuchos header file which uses auto-configuration information to include necessary C++ headers.
Concrete serial communicator subclass.
This structure defines some basic traits for a scalar field type.
static magnitudeType rmax()
Overflow theshold - (base^emax)*(1-eps)
static T pow(T x, T y)
Returns the result of raising one scalar x to the power y.
static magnitudeType magnitude(T a)
Returns the magnitudeType of the scalar type a.
static magnitudeType real(T a)
Returns the real part of the scalar type a.
static bool isnaninf(const T &x)
Returns true if x is NaN or Inf.
T halfPrecision
Typedef for half precision.
static T one()
Returns representation of one for this scalar type.
T magnitudeType
Mandatory typedef for result of magnitude.
static T zero()
Returns representation of zero for this scalar type.
static void seedrandom(unsigned int s)
Seed the random number generator returned by random().
static std::string name()
Returns the name of this scalar type.
static T conjugate(T a)
Returns the conjugate of the scalar type a.
T coordinateType
Typedef for coordinates.
static T nan()
Returns a number that represents NaN.
static magnitudeType base()
Returns the base of the machine.
static const bool isComparable
Determines if scalar type supports relational operators such as <, >, <=, >=.
static const bool isOrdinal
Determines if scalar type is an ordinal type.
static magnitudeType emax()
Returns the largest exponent before overflow.
static T random()
Returns a random number (between -one() and +one()) of this scalar type.
static magnitudeType imag(T a)
Returns the imaginary part of the scalar type a.
T doublePrecision
Typedef for double precision.
static const bool hasMachineParameters
Determines if scalar type have machine-specific parameters (i.e. eps(), sfmin(), base(),...
static magnitudeType eps()
Returns relative machine precision.
static magnitudeType rnd()
Returns 1.0 when rounding occurs in addition, 0.0 otherwise.
static T pi()
Returns the value of PI.
static T squareroot(T x)
Returns a number of magnitudeType that is the square root of this scalar type x.
static magnitudeType emin()
Returns the minimum exponent before (gradual) underflow.
static const bool isComplex
Determines if scalar type is std::complex.
static magnitudeType rmin()
Returns the underflow threshold - base^(emin-1)
static magnitudeType sfmin()
Returns safe minimum (sfmin), such that 1/sfmin does not overflow.
static magnitudeType t()
Returns the number of (base) digits in the mantissa.
static magnitudeType prec()
Returns eps*base.
static T notDefined()
This function should not compile if there is an attempt to instantiate!