Factory for creating an ExpressionNode representing '^'. More...

Inheritance diagram for MathParser\Parsing\Nodes\Factories\ExponentiationNodeFactory:

Public Member Functions
	makeNode ($leftOperand, $rightOperand)
	Create a Node representing '$leftOperand^$rightOperand'. More...

Private Member Functions
	numericExponent ($leftOperand, $rightOperand)
	Simplify an expression x^y, when y is numeric. More...

	doubleExponentiation ($leftOperand, $rightOperand)
	Simplify (x^a)^b when a and b are both numeric. More...

Detailed Description

Factory for creating an ExpressionNode representing '^'.

Some basic simplification is applied to the resulting Node.

Member Function Documentation

MathParser\Parsing\Nodes\Factories\ExponentiationNodeFactory::doubleExponentiation	(	$leftOperand,
		$rightOperand
	)

private

Simplify (x^a)^b when a and b are both numeric.

Parameters

Node	$leftOperand
Node	$rightOperand

Return values

Node|null

MathParser\Parsing\Nodes\Factories\ExponentiationNodeFactory::makeNode	(	$leftOperand,
		$rightOperand
	)

Create a Node representing '$leftOperand^$rightOperand'.

Using some simplification rules, create a NumberNode or ExpressionNode giving an AST correctly representing '$leftOperand^$rightOperand'.

To simplify the use of the function, convert integer params to NumberNodes
If $leftOperand and $rightOperand are both NumberNodes, return a single NumberNode containing x^y
If $rightOperand is a NumberNode representing 0, return '1'
If $rightOperand is a NumberNode representing 1, return $leftOperand
If $leftOperand is already a power x=a^b and $rightOperand is a NumberNode, return a^(b*y)

Parameters

Node \| int	$leftOperand	Minuend
Node \| int	$rightOperand	Subtrahend

Return values

Node

MathParser\Parsing\Nodes\Factories\ExponentiationNodeFactory::numericExponent	(	$leftOperand,
		$rightOperand
	)

private

Simplify an expression x^y, when y is numeric.

Parameters

Node	$leftOperand
Node	$rightOperand

Return values

Node|null

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