class ExpressionFunction

Represents a function that can be used in an expression.

A function is defined by two PHP callables. The callables are used by the language to compile and/or evaluate the function.

The "compiler" function is used at compilation time and must return a PHP representation of the function call (it receives the function arguments as arguments).

The "evaluator" function is used for expression evaluation and must return the value of the function call based on the values defined for the expression (it receives the values as a first argument and the function arguments as remaining arguments).

Methods

__construct(string $name, callable $compiler, callable $evaluator)

No description

getName()

No description

getCompiler()

No description

getEvaluator()

No description

fromPhp(string $phpFunctionName, string|null $expressionFunctionName = null)

Creates an ExpressionFunction from a PHP function name.

Details

at line 42
__construct(string $name, callable $compiler, callable $evaluator)

Parameters

string $name The function name
callable $compiler A callable able to compile the function
callable $evaluator A callable able to evaluate the function

at line 49
getName()

at line 54
getCompiler()

at line 59
getEvaluator()

at line 76
static ExpressionFunction fromPhp(string $phpFunctionName, string|null $expressionFunctionName = null)

Creates an ExpressionFunction from a PHP function name.

Parameters

string $phpFunctionName The PHP function name
string|null $expressionFunctionName The expression function name (default: same than the PHP function name)

Return Value

ExpressionFunction

Exceptions

InvalidArgumentException if given PHP function name does not exist
InvalidArgumentException if given PHP function name is in namespace and expression function name is not defined