PHP gen3示例

示例#1

文件： Zend_tests_generators_get_return.php 项目： gleamingthecube/php

    (yield 24);
    return 42;
}
$gen = gen2();
var_dump($gen->current());
$gen->next();
var_dump($gen->getReturn());
// & for generators specifies by-reference yield, not return
// so it's okay to return a literal
function &gen3()
{
    $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

示例#2

文件： gen3.php 项目： JosephineCoder/php_examples

<?php

function gen3($start, $end)
{
    $i = $start;
    while ($start < $end) {
        (yield $i++);
    }
}
$gen1 = gen3(0, 10);
foreach ($gen1 as $value) {
    echo $value . "\n";
    if ($value == 3) {
        $gen2 = clone $gen1;
    }
}
echo "Second generator: \n\n";
foreach ($gen2 as $value) {
    echo $value . "\n";
}

示例#3

文件： Zend_tests_generators_generator_return_without_value.php 项目： 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());

示例#4

文件： Zend_tests_generators_get_return_types.php 项目： gleamingthecube/php

var_dump($gen->getReturn());
function gen2()
{
    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;
}