scram::mef::MissionTime

The special parameter for system mission time.

#include <parameter.h>

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

Public Functions

	Name
	MissionTime(double time =0, Units unit =kHours)
Units	unit() const
void	value(double time)<br>Changes the mission time value.
virtual double	value() override
virtual Interval	interval() override
virtual bool	IsDeviate() override<br>Determines if the value of the expression contains deviate expressions.

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.
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 MissionTime

explicit MissionTime(
    double time =0,
    Units unit =kHours
)

Parameters:

• time The mission time.
• unit The unit of the given time argument.

Exceptions:

• LogicError The time value is negative.

function unit

inline Units unit() const

Return: The unit of the system mission time.

function value

void value(
    double time
)

Changes the mission time value.

Parameters:

• time The mission time in hours.

Exceptions:

• LogicError The time value is negative.

function value

inline virtual double value() override

Return: The mean value of this expression.

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

function interval

inline virtual Interval interval() override

Return: The domain interval for validation purposes only.

Reimplements: scram::mef::Expression::interval

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.

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