scram::mef::ConstantExpression

Indicates a constant value.

#include <constant.h>

Inherits from scram::mef::Expression, boost::noncopyable

Public Functions

	Name
	ConstantExpression(double value)<br>Constructor for constant integer, float, and bool values.
virtual double	value() override
virtual bool	IsDeviate() override<br>Determines if the value of the expression contains deviate expressions.

Public Attributes

	Name
ConstantExpression	kOne <br>Constant 1 or True.
ConstantExpression	kZero <br>Constant 0 or False.
ConstantExpression	kPi <br>Constant PI value.

Additional inherited members

Public Functions inherited from scram::mef::Expression

	Name
	Expression(std::vector< Expression * > args ={})<br>Constructor for use by derived classes to register their arguments.
virtual	~Expression() =default
const std::vector< Expression * > &	args() const
virtual void	Validate() const<br>Validates the expression.
virtual Interval	interval()
double	Sample()
void	Reset()<br>This routine resets the sampling to get new values.

Protected Functions inherited from scram::mef::Expression

	Name
void	AddArg(Expression * arg)<br>Registers an additional argument expression.

Public Functions Documentation

function ConstantExpression

inline explicit ConstantExpression(
    double value
)

Constructor for constant integer, float, and bool values.

Parameters:

• value Numerical value.

In other words, this constructor is implicitly generic.

function value

inline virtual double value() override

Return: The mean value of this expression.

Reimplements: scram::mef::Expression::value

function IsDeviate

inline virtual bool IsDeviate() override

Determines if the value of the expression contains deviate expressions.

Return:

• true if the expression's value deviates from its mean.
• false if the expression's value does not need sampling.

Warning: Improper registration of arguments may yield silent failure.

Reimplements: scram::mef::Expression::IsDeviate

The default logic is to check arguments with uncertainties for sampling. Derived expression classes must decide if they don't have arguments, or if they are random deviates.

Public Attributes Documentation

variable kOne

static ConstantExpression kOne;

Constant 1 or True.

variable kZero

static ConstantExpression kZero;

Constant 0 or False.

variable kPi

static ConstantExpression kPi;

Constant PI value.

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Updated on 2025-11-11 at 16:51:08 +0000