DQL inspections example/proposal for JetBrains PHPStorm EAP

proposed-dql-inspections.php

<?php

class Foo {
    private $bar = 'baz';
    /** @var Baz @ORM\ManyToOne(targetEntity=Baz::class) */
    private $baz;
}

class Baz {
    private $tab = 'taz';
}

$simpleDql = <<<'DQL'
SELECT f FROM Foo f
DQL;

// Currently, people write this for easy refactoring
$dqlWithClassReferenceAsWeCurrentlyDoIt = 'SELECT f FROM ' . Foo::class . ' f';

$dqlWithFieldAccess = <<<'DQL'
SELECT f FROM Foo f WHERE f.bar = "example"
DQL;

$dqlWithAssociationJoin = <<<'DQL'
SELECT f, b FROM Foo f JOIN f.baz b WHERE b.tab = "example"
DQL;

// Highlight lexemes (or AST nodes)
// Hover on "Foo" - reference to Foo class
// Detect usage of "Foo" inside DQL
// Refactoring Foo? Renames?
// Refactor Foo.bar (detected as Foo#$bar)
// Refactor Foo.baz.tab ($dqlWithAssociationJoin)
// Detect usage of Foo.baz.tab
// Detect unknown associations?