TableEvaluator Class Reference

An SQL-like table evaluator. More...

#include <yatescript.h>

Public Member Functions
	TableEvaluator (const TableEvaluator &original)
	TableEvaluator (ExpEvaluator::Parser style)
	TableEvaluator (const TokenDict *operators, const TokenDict *unaryOps)
virtual	~TableEvaluator ()
virtual bool	evalWhere (GenObject *context=0)
virtual bool	evalSelect (ObjList &results, GenObject *context=0)
virtual unsigned int	evalLimit (GenObject *context=0)
void	extender (ExpExtender *ext)

Protected Attributes
ExpEvaluator	m_select
ExpEvaluator	m_where
ExpEvaluator	m_limit
unsigned int	m_limitVal

Detailed Description

An SQL-like table evaluator.

An evaluator for multi-row (tables like in SQL) expressions

Constructor & Destructor Documentation

TableEvaluator() [1/3]

TableEvaluator

(

const TableEvaluator &

original

)

Copy constructor, duplicates current state of original

Parameters

original

Evaluator to copy

References TableEvaluator().

Referenced by TableEvaluator().

TableEvaluator() [2/3]

TableEvaluator

(

ExpEvaluator::Parser

style

)

Constructor from a parser synatx style

Parameters

style

Style of evaluator to create

TableEvaluator() [3/3]

TableEvaluator	(	const TokenDict *	operators,
		const TokenDict *	unaryOps )

Constructor from operator description table

Parameters

operators	Pointer to operators synatx table
unaryOps	Pointer to unary operators dictionary

~TableEvaluator()

virtual ~TableEvaluator ( )

virtual

Destructor

Member Function Documentation

evalLimit()

virtual unsigned int evalLimit ( GenObject * context = 0 )

virtual

Evaluate the LIMIT expression and cache the result

Parameters

context

Pointer to arbitrary object to be passed to called methods

Returns

Desired maximum number or result rows

evalSelect()

virtual bool evalSelect ( ObjList & results, GenObject * context = 0 )

virtual

Evaluate the SELECT (results) expression

Parameters

results	List to fill with results row
context	Pointer to arbitrary object to be passed to called methods

Returns

True if evaluation succeeded

evalWhere()

virtual bool evalWhere ( GenObject * context = 0 )

virtual

Evaluate the WHERE (selector) expression

Parameters

context

Pointer to arbitrary object to be passed to called methods

Returns

True if the current row is part of selection

extender()

void extender

(

ExpExtender *

ext

)

Set the expression extender to use in all evaluators

Parameters

ext	Pointer to the extender to use, NULL to remove current

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

• yatescript.h