Exemplos de gen4 em PHP

Exemplo n.º 1

Arquivo: Zend_tests_generators_generator_return_without_value.php Projeto: gleamingthecube/php

<?php

function gen()
{
    yield;
    return;
}
function gen2()
{
    yield;
    return null;
}
function gen3()
{
    return;
    yield;
}
function gen4()
{
    return;
    yield;
}
var_dump(gen());
var_dump(gen2());
var_dump(gen3());
var_dump(gen4());

Exemplo n.º 2

Arquivo: Zend_tests_generators_get_return.php Projeto: gleamingthecube/php

    $var = 24;
    (yield $var);
    return 42;
}
$gen = gen3();
var_dump($gen->current());
$gen->next();
var_dump($gen->getReturn());
// Return types for generators specify the return of the function,
// not of the generator return value, so this code is okay
function gen4() : Generator
{
    (yield 24);
    return 42;
}
$gen = gen4();
var_dump($gen->current());
$gen->next();
var_dump($gen->getReturn());
// Has no explicit return, but implicitly return NULL at the end
function gen5()
{
    (yield 24);
}
$gen = gen5();
var_dump($gen->current());
$gen->next();
var_dump($gen->getReturn());
// Explicit value-less return also results in a NULL generator
// return value and there is no interference with type hints
function gen6() : Generator

Exemplo n.º 3

Arquivo: Zend_tests_generators_get_return_types.php Projeto: gleamingthecube/php

{
    return "str";
    // CONST
    yield;
}
$gen = gen2();
var_dump($gen->getReturn());
function gen3($var)
{
    return $var;
    // CV
    yield;
}
$gen = gen3([1, 2, 3]);
var_dump($gen->getReturn());
function gen4($obj)
{
    return $obj->prop;
    // VAR
    yield;
}
$gen = gen4((object) ['prop' => 321]);
var_dump($gen->getReturn());
function gen5($val)
{
    return (int) $val;
    // TMP
    yield;
}
$gen = gen5("42");
var_dump($gen->getReturn());