MediaWiki\Extensions\ParserFunctions\ExprParser Class Reference

Public Member Functions
	doExpression ( $expr)
	Evaluate a mathematical expression.
	doOperation ( $op, &$stack)

Public Attributes
	$maxStackSize = 100
	$names
	$precedence
	$words

Detailed Description

Definition at line 71 of file ExprParser.php.

Member Function Documentation

doExpression()

MediaWiki\Extensions\ParserFunctions\ExprParser::doExpression

(

$expr

)

Evaluate a mathematical expression.

The algorithm here is based on the infix to RPN algorithm given in http://montcs.bloomu.edu/~bobmon/Information/RPN/infix2rpn.shtml It's essentially the same as Dijkstra's shunting yard algorithm.

Parameters

string

$expr

Exceptions

ExprError

Returns

string

Definition at line 185 of file ExprParser.php.

References $matches, MediaWiki\Extensions\ParserFunctions\ExprParser\doOperation(), MediaWiki\Extensions\ParserFunctions\EXPR_ABS, MediaWiki\Extensions\ParserFunctions\EXPR_ARCCOS, MediaWiki\Extensions\ParserFunctions\EXPR_ARCSINE, MediaWiki\Extensions\ParserFunctions\EXPR_ARCTAN, MediaWiki\Extensions\ParserFunctions\EXPR_CEIL, MediaWiki\Extensions\ParserFunctions\EXPR_COSINE, MediaWiki\Extensions\ParserFunctions\EXPR_DIVIDE, MediaWiki\Extensions\ParserFunctions\EXPR_EQUALITY, MediaWiki\Extensions\ParserFunctions\EXPR_EXP, MediaWiki\Extensions\ParserFunctions\EXPR_EXPONENT, MediaWiki\Extensions\ParserFunctions\EXPR_FLOOR, MediaWiki\Extensions\ParserFunctions\EXPR_GREATER, MediaWiki\Extensions\ParserFunctions\EXPR_GREATEREQ, MediaWiki\Extensions\ParserFunctions\EXPR_LESS, MediaWiki\Extensions\ParserFunctions\EXPR_LESSEQ, MediaWiki\Extensions\ParserFunctions\EXPR_LN, MediaWiki\Extensions\ParserFunctions\EXPR_MINUS, MediaWiki\Extensions\ParserFunctions\EXPR_NEGATIVE, MediaWiki\Extensions\ParserFunctions\EXPR_NOT, MediaWiki\Extensions\ParserFunctions\EXPR_NOTEQ, MediaWiki\Extensions\ParserFunctions\EXPR_NUMBER_CLASS, MediaWiki\Extensions\ParserFunctions\EXPR_OPEN, MediaWiki\Extensions\ParserFunctions\EXPR_PI, MediaWiki\Extensions\ParserFunctions\EXPR_PLUS, MediaWiki\Extensions\ParserFunctions\EXPR_POSITIVE, MediaWiki\Extensions\ParserFunctions\EXPR_POW, MediaWiki\Extensions\ParserFunctions\EXPR_SINE, MediaWiki\Extensions\ParserFunctions\EXPR_SQRT, MediaWiki\Extensions\ParserFunctions\EXPR_TANGENS, MediaWiki\Extensions\ParserFunctions\EXPR_TIMES, MediaWiki\Extensions\ParserFunctions\EXPR_TRUNC, and MediaWiki\Extensions\ParserFunctions\EXPR_WHITE_CLASS.

doOperation()

MediaWiki\Extensions\ParserFunctions\ExprParser::doOperation	(		$op,
		&	$stack )

Parameters

int	$op
array	&$stack

Exceptions

ExprError

Definition at line 402 of file ExprParser.php.

References MediaWiki\Extensions\ParserFunctions\EXPR_ABS, MediaWiki\Extensions\ParserFunctions\EXPR_AND, MediaWiki\Extensions\ParserFunctions\EXPR_ARCCOS, MediaWiki\Extensions\ParserFunctions\EXPR_ARCSINE, MediaWiki\Extensions\ParserFunctions\EXPR_ARCTAN, MediaWiki\Extensions\ParserFunctions\EXPR_CEIL, MediaWiki\Extensions\ParserFunctions\EXPR_COSINE, MediaWiki\Extensions\ParserFunctions\EXPR_DIVIDE, MediaWiki\Extensions\ParserFunctions\EXPR_EQUALITY, MediaWiki\Extensions\ParserFunctions\EXPR_EXP, MediaWiki\Extensions\ParserFunctions\EXPR_EXPONENT, MediaWiki\Extensions\ParserFunctions\EXPR_FLOOR, MediaWiki\Extensions\ParserFunctions\EXPR_FMOD, MediaWiki\Extensions\ParserFunctions\EXPR_GREATER, MediaWiki\Extensions\ParserFunctions\EXPR_GREATEREQ, MediaWiki\Extensions\ParserFunctions\EXPR_LESS, MediaWiki\Extensions\ParserFunctions\EXPR_LESSEQ, MediaWiki\Extensions\ParserFunctions\EXPR_LN, MediaWiki\Extensions\ParserFunctions\EXPR_MINUS, MediaWiki\Extensions\ParserFunctions\EXPR_MOD, MediaWiki\Extensions\ParserFunctions\EXPR_NEGATIVE, MediaWiki\Extensions\ParserFunctions\EXPR_NOT, MediaWiki\Extensions\ParserFunctions\EXPR_NOTEQ, MediaWiki\Extensions\ParserFunctions\EXPR_OR, MediaWiki\Extensions\ParserFunctions\EXPR_PLUS, MediaWiki\Extensions\ParserFunctions\EXPR_POSITIVE, MediaWiki\Extensions\ParserFunctions\EXPR_POW, MediaWiki\Extensions\ParserFunctions\EXPR_ROUND, MediaWiki\Extensions\ParserFunctions\EXPR_SINE, MediaWiki\Extensions\ParserFunctions\EXPR_SQRT, MediaWiki\Extensions\ParserFunctions\EXPR_TANGENS, MediaWiki\Extensions\ParserFunctions\EXPR_TIMES, and MediaWiki\Extensions\ParserFunctions\EXPR_TRUNC.

Referenced by MediaWiki\Extensions\ParserFunctions\ExprParser\doExpression().

Member Data Documentation

$maxStackSize

MediaWiki\Extensions\ParserFunctions\ExprParser::$maxStackSize = 100

Definition at line 72 of file ExprParser.php.

$names

MediaWiki\Extensions\ParserFunctions\ExprParser::$names

Definition at line 113 of file ExprParser.php.

$precedence

MediaWiki\Extensions\ParserFunctions\ExprParser::$precedence

Definition at line 74 of file ExprParser.php.

$words

MediaWiki\Extensions\ParserFunctions\ExprParser::$words

Initial value:

= [
        'mod' => EXPR_MOD,
        'fmod' => EXPR_FMOD,
        'and' => EXPR_AND,
        'or' => EXPR_OR,
        'not' => EXPR_NOT,
        'round' => EXPR_ROUND,
        'div' => EXPR_DIVIDE,
        'e' => EXPR_EXPONENT,
        'sin' => EXPR_SINE,
        'cos' => EXPR_COSINE,
        'tan' => EXPR_TANGENS,
        'asin' => EXPR_ARCSINE,
        'acos' => EXPR_ARCCOS,
        'atan' => EXPR_ARCTAN,
        'exp' => EXPR_EXP,
        'ln' => EXPR_LN,
        'abs' => EXPR_ABS,
        'trunc' => EXPR_TRUNC,
        'floor' => EXPR_FLOOR,
        'ceil' => EXPR_CEIL,
        'pi' => EXPR_PI,
        'sqrt' => EXPR_SQRT,
    ]

Definition at line 150 of file ExprParser.php.

---

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

• extensions/ParserFunctions/includes/ExprParser.php