FPPP: Support catch without variable

Author: nikic

lib/PhpParser/PrettyPrinterAbstract.php

@@ -1220,6 +1220,7 @@ protected function initializeRemovalMap() {
             'Param->type' => $stripRight,
             'Param->default' => $stripEquals,
             'Stmt_Break->num' => $stripBoth,
+            'Stmt_Catch->var' => $stripLeft,
             'Stmt_ClassMethod->returnType' => $stripColon,
             'Stmt_Class->extends' => ['left' => \T_EXTENDS],
             'Expr_PrintableNewAnonClass->extends' => ['left' => \T_EXTENDS],
@@ -1257,6 +1258,7 @@ protected function initializeInsertionMap() {
             'Param->type' => [null, false, null, ' '],
             'Param->default' => [null, false, ' = ', null],
             'Stmt_Break->num' => [\T_BREAK, false, ' ', null],
+            'Stmt_Catch->var' => [null, false, ' ', null],
             'Stmt_ClassMethod->returnType' => [')', false, ' : ', null],
             'Stmt_Class->extends' => [null, false, ' extends ', null],
             'Expr_PrintableNewAnonClass->extends' => [null, ' extends ', null],

test/code/formatPreservation/insertionOfNullable.test

@@ -173,4 +173,22 @@ $stmts[0]->name = new Node\Name('Foo');
 <?php
 
 namespace Foo
-{ echo 42; }
+{ echo 42; }
+-----
+<?php
+try
+{
+}
+catch (Exception)
+{
+}
+-----
+$stmts[0]->catches[0]->var = new Expr\Variable('e');
+-----
+<?php
+try
+{
+}
+catch (Exception $e)
+{
+}

test/code/formatPreservation/removalViaNull.test

@@ -191,4 +191,22 @@ $stmts[0]->name = null;
 
 namespace
     {
-    }
+    }
+-----
+<?php
+try
+{
+}
+catch (Exception $e)
+{
+}
+-----
+$stmts[0]->catches[0]->var = null;
+-----
+<?php
+try
+{
+}
+catch (Exception)
+{
+}