KeysInVector Class Reference

Pattern made by a value::Vector whose entries are keys followed by a value::Vector or value::Matrix. More...

#include <keyvalue/pattern/KeysInVector.h>

Inheritance diagram for KeysInVector:

List of all members.

Public Member Functions
bool	parse (frontend::Queue &queue)
	Parses the beginning of a frontend::Queue.
std::pair< string, value::Value >	pop ()
	Gets and removes the next stored key-value pair.
bool	isEmpty () const
	Checks if the list of recognized key-value pairs is empty.
Private Attributes
size_t	next_
vector< std::pair< string, value::Value > >	data_

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Detailed Description

Pattern made by a value::Vector whose entries are keys followed by a value::Vector or value::Matrix.

The pattern is defined by a value::Vector K, where all entries are keys, followed by a value::Value object V which is either a value::Vector or value::Matrix such that

• V has n rows if K is a column value::Vector of size n;
• V has n columns if K is a row value::Vector of size n.

In the first case the n-th row of V (which is either a value::Single or a row value::Vector) is considered the value associated to the n-th key in K.

Similarly, in the second case the n-th column of V is the value associated to the n-th key in K.

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Member Function Documentation

bool parse

(

frontend::Queue &

queue

)

[virtual]

Parses the beginning of a frontend::Queue.

When a pattern is recognized, the value::Value objects which make it are removed from frontend::Queue and all corresponding key-value pairs are stored inside the this class for later queries.

Parameters:

queue

: frontend::Queue to be parsed.

Returns:

If the pattern is recognized, then this method returns true. Otherwise, it returns false.

Implements Pattern.

std::pair<string, value::Value> pop

(

)

[virtual]

Gets and removes the next stored key-value pair.

The debug version checks if there is any key-value pair be popped (by calling isEmpty()) and throw an exception when the check fails. Release version has undefined behavior when the list is empty.

Returns:

The key-value pair.

Exceptions:

LogicError

: (Debug build only) When the list is empty.

Implements Pattern.

bool isEmpty

(

)

const [virtual]

Checks if the list of recognized key-value pairs is empty.

Returns:

If the list is empty, this method returns true. Otherwise, it returns false.

Implements Pattern.