isc::dhcp::TokenConcat Class Reference

Token that represents concat operator (concatenates two other tokens) More...

#include <token.h>

Inheritance diagram for isc::dhcp::TokenConcat:

Public Member Functions
	TokenConcat ()
	Constructor (does nothing)
virtual unsigned	evaluate (Pkt &pkt, ValueStack &values)
	Concatenate two values.
Public Member Functions inherited from isc::dhcp::Token
virtual	~Token ()
	Virtual destructor.
virtual unsigned	getLabel () const
	Return the label of this token.

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 concat operator (concatenates two other tokens)

For example in the sub-expression "concat('foo','bar')" the result of the evaluation is "foobar" For user convenience the "'foo' + 'bar'" alternative does the same.

Definition at line 913 of file token.h.

Constructor & Destructor Documentation

TokenConcat()

isc::dhcp::TokenConcat::TokenConcat ( )

inline

Constructor (does nothing)

Definition at line 916 of file token.h.

Member Function Documentation

evaluate()

unsigned TokenConcat::evaluate ( Pkt & pkt, ValueStack & values )

virtual

Concatenate two values.

Evaluation does not use packet information, but rather consumes the last two parameters. It does a simple string concatenation. It requires at least two parameters to be present on stack.

Exceptions

EvalBadStack

if there are less than 2 values on stack

Parameters

pkt	(unused)
values	- stack of values (2 arguments will be popped, 1 result will be pushed)

Returns

0 which means evaluate next token if any.

Implements isc::dhcp::Token.

Definition at line 964 of file token.cc.

References isc::dhcp::EVAL_DBG_STACK, isc::dhcp::EVAL_DEBUG_CONCAT, isc::dhcp::eval_logger, isc_throw, and LOG_DEBUG.

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

• token.h
• token.cc