LLU::WS::Missing Struct Reference

Description

Special type of a Function which corresponds to the Missing expression when exchanged with the Kernel via WSStream.

Inheritance diagram for LLU::WS::Missing:

Collaboration diagram for LLU::WS::Missing:

#include <Utilities.h>

Public Member Functions
	Missing ()
	Default constructor - sets "Missing" to be the head of expression with no arguments. More...
	Missing (std::string r)
	Create a WSStream-compatible structure that corresponds to a Missing expression with given "reason". More...
const std::string &	why () const
	Get the first argument of the expression which is the reason for the data's being missing. More...
int	getArgc () const
	Get argument count. More...
void	setArgc (int newArgc)
	Set argument count. More...
const std::string &	getHead () const
	Get Symbol name/head. More...
void	setHead (std::string h)
	Set Symbol name/head. More...

Constructor & Destructor Documentation

Missing() [1/2]

LLU::WS::Missing::Missing ( )

inline

Default constructor - sets "Missing" to be the head of expression with no arguments.

Missing() [2/2]

LLU::WS::Missing::Missing ( std::string  r )

inlineexplicit

Create a WSStream-compatible structure that corresponds to a Missing expression with given "reason".

Parameters

r	- reason for the Missing

Member Function Documentation

getArgc()

int LLU::WS::Function::getArgc ( ) const

inherited

Get argument count.

Returns

number of arguments this function takes

getHead()

const std::string & LLU::WS::Symbol::getHead ( ) const

inherited

Get Symbol name/head.

Returns

head

setArgc()

void LLU::WS::Function::setArgc ( int  newArgc )

inherited

Set argument count.

Parameters

newArgc

- new value for argument count

setHead()

void LLU::WS::Symbol::setHead ( std::string  h )

inherited

Set Symbol name/head.

Parameters

h	- new head for the Symbol

why()

const std::string& LLU::WS::Missing::why ( ) const

inline

Get the first argument of the expression which is the reason for the data's being missing.

Returns

the reason, typically "NotApplicable", "Unknown", "NotAvailable", "Nonexistent", etc.

See also

https://reference.wolfram.com/language/ref/Missing.html