Attributes
-----
<?php
#[A]
class X {
    #[A]
    public function m(#[A] & $p) {}

    #[A]
    public
        $prop;

    #[A]
    const
        X = 42;
}

#[A]
trait X {}

#[A]
interface X {}

#[A]
function f() {}

new #[A] class {};
#[A] function() {};
#[A] fn()
    => 42;
-----
$attrGroup = new Node\AttributeGroup([
    new Node\Attribute(new Node\Name('B'), []),
]);
$stmts[0]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[0]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[0]->params[0]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[1]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[2]->attrGroups[] = $attrGroup;
$stmts[1]->attrGroups[] = $attrGroup;
$stmts[2]->attrGroups[] = $attrGroup;
$stmts[3]->attrGroups[] = $attrGroup;
$stmts[4]->expr->class->attrGroups[] = $attrGroup;
$stmts[5]->expr->attrGroups[] = $attrGroup;
$stmts[6]->expr->attrGroups[] = $attrGroup;
-----
<?php
#[A]
#[B]
class X {
    #[A]
    #[B]
    public function m(#[A] #[B] & $p) {}

    #[A]
    #[B]
    public
        $prop;

    #[A]
    #[B]
    const
        X = 42;
}

#[A]
#[B]
trait X {}

#[A]
#[B]
interface X {}

#[A]
#[B]
function f() {}

new #[A] #[B] class {};
#[A] #[B] function() {};
#[A] #[B] fn()
    => 42;
-----
<?php
class X {
    public function m() {}

    public
        $prop;

    const
        X = 42;
}

trait X {}

interface X {}

function f() {}

new class {};
function() {};
fn()
    => 42;
-----
// TODO: Currently we lose formatting for this case.
$attrGroup = new Node\AttributeGroup([
    new Node\Attribute(new Node\Name('A'), []),
]);
$stmts[0]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[0]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[1]->attrGroups[] = $attrGroup;
$stmts[0]->stmts[2]->attrGroups[] = $attrGroup;
$stmts[1]->attrGroups[] = $attrGroup;
$stmts[2]->attrGroups[] = $attrGroup;
$stmts[3]->attrGroups[] = $attrGroup;
$stmts[4]->expr->class->attrGroups[] = $attrGroup;
$stmts[5]->expr->attrGroups[] = $attrGroup;
$stmts[6]->expr->attrGroups[] = $attrGroup;
-----
<?php
#[A]
class X
{
    #[A]
    public function m()
    {
    }
    #[A]
    public $prop;
    #[A]
    const X = 42;
}

#[A]
trait X
{
}

#[A]
interface X
{
}

#[A]
function f()
{
}

new #[A] class
{
};
#[A] function () {
};
#[A] fn() => 42;
-----
<?php

#[ A,   B]
class X {};
#[
    A,
    B,
]
class X {};
-----
$attr = new Node\Attribute(new Node\Name('C'), []);
$stmts[0]->attrGroups[0]->attrs[] = $attr;
$stmts[1]->attrGroups[0]->attrs[] = $attr;
-----
<?php

#[ A,   B, C]
class X {};
#[
    A,
    B,
    C,
]
class X {};