Helper class for converting rules to reverse polish notation (RPN). More...

Static Public Member Functions
static	convert ($rule)
	Convert a rule to RPN.
Public Attributes
	$end
	$operands = array()
	$operators = array()
	$pos
	$rule
const	NUMBER_CLASS = '0123456789'
	Same for digits.
const	WHITESPACE_CLASS = " \t\r\n"
	A character list defining whitespace, for use in strspn() etc.
const	WORD_REGEX = '/[a-zA-Z]+/A'
	An anchored regular expression which matches a word at the current offset.
Static Public Attributes
static	$precedence
	Precedence levels.
Protected Member Functions
	__construct ($rule)
	Private constructor.
	doConvert ()
	Do the operation.
	doOperation ($op)
	For the binary operator $op, pop its operands off the stack and push a fragment with rpn and type members describing the result of that operation.
	error ($message)
	Throw an error.
	newNumber ($text, $pos)
	Create a numerical expression object.
	newOperator ($type, $pos, $length)
	Create a binary operator.
	nextToken ()
	Fetch the next token from the input string.

Detailed Description

Helper class for converting rules to reverse polish notation (RPN).

Definition at line 210 of file CLDRPluralRuleEvaluator.php.

Constructor & Destructor Documentation

CLDRPluralRuleConverter::__construct ( $ rule ) [protected]

Private constructor.

Definition at line 261 of file CLDRPluralRuleEvaluator.php.

References $rule.

Member Function Documentation

static CLDRPluralRuleConverter::convert ( $ rule ) [static]

Convert a rule to RPN.

This is the only public entry point.

Definition at line 253 of file CLDRPluralRuleEvaluator.php.

References $rule.

Referenced by CLDRPluralRuleEvaluator\compile().

CLDRPluralRuleConverter::doConvert ( ) [protected]

Do the operation.

Definition at line 270 of file CLDRPluralRuleEvaluator.php.

References $value, doOperation(), error(), and nextToken().

CLDRPluralRuleConverter::doOperation ( $ op ) [protected]

For the binary operator $op, pop its operands off the stack and push a fragment with rpn and type members describing the result of that operation.

Definition at line 413 of file CLDRPluralRuleEvaluator.php.

References $result.

Referenced by doConvert().

CLDRPluralRuleConverter::error ( $ message ) [protected]

Throw an error.

Definition at line 440 of file CLDRPluralRuleEvaluator.php.

Referenced by doConvert(), and nextToken().

CLDRPluralRuleConverter::newNumber	(	$	text,
		$	pos
	)		`[protected]`

Create a numerical expression object.

Definition at line 426 of file CLDRPluralRuleEvaluator.php.

References $pos.

Referenced by nextToken().

CLDRPluralRuleConverter::newOperator	(	$	type,
		$	pos,
		$	length
	)		`[protected]`

Create a binary operator.

Definition at line 433 of file CLDRPluralRuleEvaluator.php.

References $pos.

Referenced by nextToken().

CLDRPluralRuleConverter::nextToken ( ) [protected]

Fetch the next token from the input string.

Return it as a CLDRPluralRuleConverter_Fragment object.

Definition at line 328 of file CLDRPluralRuleEvaluator.php.

References error(), newNumber(), and newOperator().

Referenced by doConvert().

Member Data Documentation

CLDRPluralRuleConverter::$end

Definition at line 211 of file CLDRPluralRuleEvaluator.php.

CLDRPluralRuleConverter::$operands = array()

Definition at line 213 of file CLDRPluralRuleEvaluator.php.

CLDRPluralRuleConverter::$operators = array()

Definition at line 212 of file CLDRPluralRuleEvaluator.php.

CLDRPluralRuleConverter::$pos

Definition at line 211 of file CLDRPluralRuleEvaluator.php.

Referenced by newNumber(), and newOperator().

CLDRPluralRuleConverter::$precedence [static]

Initial value:

 array(
                'or' => 2,
                'and' => 3,
                'is' => 4,
                'is-not' => 4,
                'in' => 4,
                'not-in' => 4,
                'within' => 4,
                'not-within' => 4,
                'mod' => 5,
                ',' => 6,
                '..' => 7,
        )