PHP Class Zephir\Passes\LocalContextPass

This pass tries to check whether variables only do exist in the local context of the method block or if they're used externally which will unallow variables to be placed in the stack This pass also tracks the number of initializations a variable may have, this allows to mark variables as read-only after their last initialization. The number of mutations is relative, since assignments inside cycles/loops may perform a n-number of mutations

Afficher le fichier Open project: phalcon/zephir Class Usage Examples

Protected Properties

Свойство	Type	Description
$lastCallLine
$lastUnsetLine
$mutations
$uses
$variables

Méthodes publiques

Méthode	Description
declareVariables ( array $statement )
getLastCallLine ( ) : integer	Returns the line where the latest call in the method was made
getLastUnsetLine ( ) : integer	Returns the line where the latest unset operation was made
getLastVariableUseLine ( string $variable ) : integer	Returns the latest line where a variable was read
getNumberOfMutations ( string $variable ) : integer	Returns the number of assignment instructions that mutated a variable
increaseMutations ( string $variable )	Increase the number of mutations a variable has inside a statement block
markLastUse ( string $variable, array $node )	Marks the latest use/read of a variable
markVariableNoLocal ( string $variable )	Marks a variable to mandatory be stored in the heap
pass ( Zephir\StatementsBlock $block )	Do the compilation pass
passArray ( array $expression )
passCall ( array $expression )
passExpression ( array $expression )
passLetStatement ( array $statement )
passNew ( array $expression )
passStatementBlock ( array $statements )
shouldBeLocal ( string $variable ) : boolean	Asks the local context information whether a variable can be stored in the stack instead of the heap

Method Details

declareVariables() public méthode

public declareVariables ( array $statement )
$statement	array

getLastCallLine() public méthode

Returns the line where the latest call in the method was made

public getLastCallLine ( ) : integer
Résultat	integer

getLastUnsetLine() public méthode

Returns the line where the latest unset operation was made

public getLastUnsetLine ( ) : integer
Résultat	integer

getLastVariableUseLine() public méthode

Returns the latest line where a variable was read

public getLastVariableUseLine ( string $variable ) : integer
$variable	string
Résultat	integer

getNumberOfMutations() public méthode

Returns the number of assignment instructions that mutated a variable

public getNumberOfMutations ( string $variable ) : integer
$variable	string
Résultat	integer

increaseMutations() public méthode

Increase the number of mutations a variable has inside a statement block

public increaseMutations ( string $variable )
$variable	string

markLastUse() public méthode

Marks the latest use/read of a variable

public markLastUse ( string $variable, array $node )
$variable	string
$node	array

markVariableNoLocal() public méthode

Marks a variable to mandatory be stored in the heap

public markVariableNoLocal ( string $variable )
$variable	string

pass() public méthode

Do the compilation pass

public pass ( Zephir\StatementsBlock $block )
$block	Zephir\StatementsBlock

passArray() public méthode

public passArray ( array $expression )
$expression	array

passCall() public méthode

public passCall ( array $expression )
$expression	array

passExpression() public méthode

public passExpression ( array $expression )
$expression	array

passLetStatement() public méthode

public passLetStatement ( array $statement )
$statement	array

passNew() public méthode

public passNew ( array $expression )
$expression	array

passStatementBlock() public méthode

public passStatementBlock ( array $statements )
$statements	array

shouldBeLocal() public méthode

Asks the local context information whether a variable can be stored in the stack instead of the heap

public shouldBeLocal ( string $variable ) : boolean
$variable	string
Résultat	boolean

Property Details

$lastCallLine protected_oe property

protected $lastCallLine

$lastUnsetLine protected_oe property

protected $lastUnsetLine

$mutations protected_oe property

protected $mutations

$uses protected_oe property

protected $uses

$variables protected_oe property

protected $variables