isc::dhcp::TokenNot Class Reference

Token that represents logical negation operator. More...

#include <token.h>

Inheritance diagram for isc::dhcp::TokenNot:

Public Member Functions
	TokenNot ()
	Constructor (does nothing)
void	evaluate (Pkt &pkt, ValueStack &values)
	Logical negation.
Public Member Functions inherited from isc::dhcp::Token
virtual	~Token ()
	Virtual destructor.
virtual void	evaluate (Pkt &pkt, ValueStack &values)=0
	This is a generic method for evaluating a packet.

Additional Inherited Members
Static Public Member Functions inherited from isc::dhcp::Token
static bool	toBool (std::string value)
	Coverts a (string) value to a boolean.

Detailed Description

Token that represents logical negation operator.

For example in the expression "not(option[vendor-class].text == 'MSF')" this token represents the leading "not"

Definition at line 970 of file token.h.

Constructor & Destructor Documentation

TokenNot()

isc::dhcp::TokenNot::TokenNot ( )

inline

Constructor (does nothing)

Definition at line 973 of file token.h.

Member Function Documentation

evaluate()

void TokenNot::evaluate ( Pkt &  pkt, ValueStack &  values  )

virtual

Logical negation.

Evaluation does not use packet information, but rather consumes the last result. It does a simple string comparison and sets the value to either "true" or "false". It requires at least one value to be present on stack and to be either "true" or "false".

Exceptions

EvalBadStack	if there are less than 1 value on stack
EvalTypeError	if the top value on the stack is not either "true" or "false"

Parameters

pkt	(unused)
values	- stack of values (logical top value negated)

Implements isc::dhcp::Token.

Definition at line 985 of file token.cc.

References isc::dhcp::EVAL_DBG_STACK, isc::dhcp::EVAL_DEBUG_NOT, isc::dhcp::eval_logger, isc_throw, LOG_DEBUG, and isc::dhcp::Token::toBool().

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The documentation for this class was generated from the following files:

• token.h
• token.cc