[DowngradePhp70] Handle DowngradeScalarTypeDeclarationRector on Closu…

…re (#102)

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeScalarTypeDeclarationRector/Fixture/closure.php.inc

@@ -0,0 +1,28 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeScalarTypeDeclarationRector\Fixture;
+
+do_something(function ( string $to_return ) : string {
+    return $to_return;
+});
+
+function do_something($returner) {
+  $returned = $returner('abc123');
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeScalarTypeDeclarationRector\Fixture;
+
+do_something(function ( $to_return ) {
+    $to_return = (string) $to_return;
+    return $to_return;
+});
+
+function do_something($returner) {
+  $returned = $returner('abc123');
+}
+
+?>

rules/DowngradePhp70/Rector/FunctionLike/DowngradeScalarTypeDeclarationRector.php

@@ -11,6 +11,7 @@
 use PhpParser\Node\Expr\Cast\Double;
 use PhpParser\Node\Expr\Cast\Int_;
 use PhpParser\Node\Expr\Cast\String_;
+use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Expr\Variable;
 use PhpParser\Node\FunctionLike;
 use PhpParser\Node\Param;
@@ -44,7 +45,7 @@ public function __construct(
      */
     public function getNodeTypes(): array
     {
-        return [Function_::class, ClassMethod::class];
+        return [Function_::class, ClassMethod::class, Closure::class];
     }
 
     public function getRuleDefinition(): RuleDefinition