Expressions: Object Operations #

Method Calls #

Methods can be called on an object using the -> operator, followed by the method name, followed by an optional type parameter ( ::<type> ), followed by a comma-separated list of arguments in parentheses.

$foo = new Foo();

$foo->bar();
$foo->baz::<int>(1, 2, 3);
$foo->qux::<int, string, bool>(1, 'foo', true);

function example(Foo $foo): void {
  $foo->{bar()}();
}

error[P0042]: unexpected token `{`, expected an identifier
  ┌─ examples/dynamic-method-call.ara:2:8
  │
2 │   $foo->{bar()}();
  │         ^ unexpected token `{`, expected an identifier

Null Safe Method Calls #

Methods can be called on an object that may be null using the ?-> operator, followed by the method name, followed by an optional type parameter ( ::<type> ), followed by a comma-separated list of arguments in parentheses.

$foo = get_foo_or_null();

$foo?->bar();
$foo?->baz::<int>(1, 2, 3);

Method Closure Creation #

A closure can be created from a method using the -> operator, followed by the method name, followed by an optional type parameter ( ::<type> ), followed by (...).

$foo = new Foo();

$bar = $foo->bar(...);
$baz = $foo->baz::<int>(...);
$qux = $foo->qux::<int, string, bool>(...);

Property Access #

Properties can be accessed on an object using the -> operator, followed by the property name ( without $ sign )

$foo = new Foo();

$foo->bar;

function example(Foo $foo): string {
  $foo->{bar()}
}

error[P0042]: unexpected token `{`, expected an identifier
  ┌─ examples/dynamic-property-access.ara:2:9
  │
2 │   $foo->{bar()}
  │         ^ unexpected token `{`, expected an identifier

Null Safe Property Access #

Properties can be accessed on an object that may be null using the ?-> operator, followed by the property name ( without $ sign )

$foo = get_foo_or_null();

$foo?->bar;