Class UnaryExpression
An expression object that represents an expression with only a single operand.
- Cake\Database\Expression\UnaryExpression implements Cake\Database\ExpressionInterface
Properties summary
-
$_modeprotectedintegerWhere to place the operator -
$_operatorprotectedstringThe operator this unary expression represents -
$_valueprotectedmixedHolds the value which the unary expression operates
Method Summary
-
__clone() public
Perform a deep clone of the inner expression. -
__construct() public
Constructor -
sql() public
Converts the expression to its string representation -
traverse() public
Iterates over each part of the expression recursively for every level of the expressions tree and executes the $visitor callable passing as first parameter the instance of the expression currently being iterated.
Method Detail
__construct() public ¶
__construct( string $operator , mixed $value , integer $mode self::PREFIX )
Constructor
Parameters
- string $operator
- The operator to used for the expression
- mixed $value
- the value to use as the operand for the expression
- integer $mode optional self::PREFIX
- either UnaryExpression::PREFIX or UnaryExpression::POSTFIX
sql() public ¶
sql( Cake\Database\ValueBinder $generator )
Converts the expression to its string representation
Parameters
- Cake\Database\ValueBinder $generator
- Placeholder generator object
Returns
string
Implementation of
traverse() public ¶
traverse( callable $callable )
Iterates over each part of the expression recursively for every level of the expressions tree and executes the $visitor callable passing as first parameter the instance of the expression currently being iterated.
Parameters
- callable $callable
- $visitor The callable to apply to all nodes.