Printer: added $declareOnOpenTag option

Author: dg

src/PhpGenerator/Printer.php

@@ -26,6 +26,7 @@ class Printer
 	public bool $bracesOnNextLine = true;
 	public bool $singleParameterOnOneLine = false;
 	public bool $omitEmptyNamespaces = true;
+	public bool $declareOnOpenTag = false;
 	protected ?PhpNamespace $namespace = null;
 	protected ?Dumper $dumper;
 	private bool $resolveTypes = true;
@@ -286,10 +287,12 @@ public function printFile(PhpFile $file): string
 			}
 		}
 
-		return "<?php\n"
+		$strictTypes = $file->hasStrictTypes();
+		return '<?php' . ($strictTypes && $this->declareOnOpenTag ? ' declare(strict_types=1);' : '')
+			. "\n"
 			. ($file->getComment() ? "\n" . $this->printDocComment($file) : '')
 			. "\n"
-			. ($file->hasStrictTypes() ? "declare(strict_types=1);\n\n" : '')
+			. ($strictTypes && !$this->declareOnOpenTag ? "declare(strict_types=1);\n\n" : '')
 			. implode("\n\n", $namespaces);
 	}
 

tests/PhpGenerator/Printer.declare.phpt

@@ -0,0 +1,61 @@
+<?php declare(strict_types=1);
+
+use Nette\PhpGenerator\PhpFile;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+test('file with singleLineOpenTag and strict types', function () {
+	$file = new PhpFile;
+	$file->addComment('This file is auto-generated. DO NOT EDIT!');
+	$file->setStrictTypes();
+	$file->addClass('A');
+
+	$printer = new Nette\PhpGenerator\Printer;
+	$printer->declareOnOpenTag = true;
+
+	Assert::match(<<<'XX'
+		<?php declare(strict_types=1);
+
+		/**
+		 * This file is auto-generated. DO NOT EDIT!
+		 */
+
+		class A
+		{
+		}
+
+		XX, $printer->printFile($file));
+});
+
+
+test('singleLineOpenTag without comment', function () {
+	$file = new PhpFile;
+	$file->setStrictTypes();
+	$file->addClass('A');
+
+	$printer = new Nette\PhpGenerator\Printer;
+	$printer->declareOnOpenTag = true;
+
+	Assert::match(<<<'XX'
+		<?php declare(strict_types=1);
+
+		class A
+		{
+		}
+
+		XX, $printer->printFile($file));
+});
+
+
+test('singleLineOpenTag has no effect without strict types', function () {
+	$file = new PhpFile;
+	$file->addClass('A');
+
+	$printerA = new Nette\PhpGenerator\Printer;
+	$printerB = new Nette\PhpGenerator\Printer;
+	$printerB->declareOnOpenTag = true;
+
+	Assert::same($printerA->printFile($file), $printerB->printFile($file));
+});