fix: Scope string literals used in expressions

Closes humbug#557.

Author: theofidry

specs/misc/composer.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the humbug/php-scoper package.
+ *
+ * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
+ *                    Pádraic Brady <padraic.brady@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Humbug\PhpScoper\SpecFramework\Config\Meta;
+
+return [
+    'meta' => new Meta(
+        title: 'Scalar literal used in an expression',
+    ),
+
+    'String value used in a comparison expression' => <<<'PHP'
+        <?php
+
+        namespace Composer\Package\Loader;
+
+        if ($class !== 'Composer\Package\CompletePackage' && $class !== 'Composer\Package\RootPackage') {
+            trigger_error('The $class arg is deprecated, please reach out to Composer maintainers ASAP if you still need this.', E_USER_DEPRECATED);
+        }
+
+        ----
+        <?php
+
+        namespace Humbug\Composer\Package\Loader;
+
+        if ($class !== 'Humbug\Composer\Package\CompletePackage' && $class !== 'Humbug\Composer\Package\RootPackage') {
+            trigger_error('The $class arg is deprecated, please reach out to Composer maintainers ASAP if you still need this.', \E_USER_DEPRECATED);
+        }
+
+        PHP,
+
+    'Non valid class name string value used in a comparison expression' => <<<'PHP'
+        <?php
+
+        namespace Composer\Package\Loader;
+
+        if ($class !== '1Composer\Package\CompletePackage' && $class !== '0Composer\Package\RootPackage') {
+            trigger_error('The $class arg is deprecated, please reach out to Composer maintainers ASAP if you still need this.', E_USER_DEPRECATED);
+        }
+
+        ----
+        <?php
+
+        namespace Humbug\Composer\Package\Loader;
+
+        if ($class !== '1Composer\Package\CompletePackage' && $class !== '0Composer\Package\RootPackage') {
+            trigger_error('The $class arg is deprecated, please reach out to Composer maintainers ASAP if you still need this.', \E_USER_DEPRECATED);
+        }
+
+        PHP,
+];

specs/string-literal/expr.php

@@ -14,7 +14,6 @@
 
 namespace Humbug\PhpScoper\Configuration;
 
-use Humbug\PhpScoper\Patcher\ComposerPatcher;
 use Humbug\PhpScoper\Patcher\Patcher;
 use Humbug\PhpScoper\Patcher\PatcherChain;
 use Humbug\PhpScoper\Patcher\SymfonyParentTraitPatcher;
@@ -89,7 +88,6 @@ public function create(?string $path = null, array $paths = []): Configuration
 
         array_unshift($patchers, new SymfonyPatcher());
         array_unshift($patchers, new SymfonyParentTraitPatcher());
-        array_unshift($patchers, new ComposerPatcher());
 
         $symbolsConfiguration = $this->symbolsConfigurationFactory->createSymbolsConfiguration($config);
 

src/Configuration/ConfigurationFactory.php

@@ -21,6 +21,7 @@
 use PhpParser\Node\Arg;
 use PhpParser\Node\ArrayItem;
 use PhpParser\Node\Const_;
+use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\Array_;
 use PhpParser\Node\Expr\Assign;
 use PhpParser\Node\Expr\FuncCall;
@@ -174,6 +175,7 @@ private function prefixStringScalar(String_ $string): String_
             $parentNode instanceof Assign
                 || $parentNode instanceof Param
                 || $parentNode instanceof Const_
+                || $parentNode instanceof Expr
                 || $parentNode instanceof PropertyProperty
                 || $parentNode instanceof Return_
         )) {

src/Patcher/ComposerPatcher.php

@@ -17,7 +17,6 @@
 use Fidry\FileSystem\FS;
 use Humbug\PhpScoper\Container;
 use Humbug\PhpScoper\FileSystemTestCase;
-use Humbug\PhpScoper\Patcher\ComposerPatcher;
 use Humbug\PhpScoper\Patcher\PatcherChain;
 use Humbug\PhpScoper\Patcher\SymfonyParentTraitPatcher;
 use Humbug\PhpScoper\Patcher\SymfonyPatcher;
@@ -60,7 +59,6 @@ public function test_it_can_be_created_without_a_file(): void
         self::assertSame([], $configuration->getFilesWithContents());
         self::assertEquals(
             new PatcherChain([
-                new ComposerPatcher(),
                 new SymfonyParentTraitPatcher(),
                 new SymfonyPatcher(),
             ]),
@@ -141,7 +139,6 @@ public function test_it_can_create_a_complete_configuration(): void
         );
         self::assertEquals(
             new PatcherChain([
-                new ComposerPatcher(),
                 new SymfonyParentTraitPatcher(),
                 new SymfonyPatcher(),
             ]),