Printer: added $singleParameterOnOneLine flag

src/PhpGenerator/Printer.php

@@ -27,6 +27,7 @@ class Printer
 	public int $linesBetweenUseTypes = 0;
 	public string $returnTypeColon = ': ';
 	public bool $bracesOnNextLine = true;
+	public bool $singleParameterOnOneLine = false;
 	protected ?PhpNamespace $namespace = null;
 	protected ?Dumper $dumper;
 	private bool $resolveTypes = true;
@@ -329,6 +330,7 @@ protected function printParameters(Closure|GlobalFunction|Method $function, int
 		$params = [];
 		$list = $function->getParameters();
 		$multiline = false;
+		$single = $this->singleParameterOnOneLine && count($list) === 1;
 
 		foreach ($list as $param) {
 			$param->validate();
@@ -348,7 +350,7 @@ protected function printParameters(Closure|GlobalFunction|Method $function, int
 				. '$' . $param->getName()
 				. ($param->hasDefaultValue() && !$variadic ? ' = ' . $this->dump($param->getDefaultValue()) : '');
 
-			$multiline = $multiline || $promoted || $attrs;
+			$multiline = $multiline || (!$single && ($promoted || $attrs));
 		}
 
 		$line = implode(', ', $params);

tests/PhpGenerator/Printer.single.parameter.phpt

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+use Nette\PhpGenerator\Printer;
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+$printer = new Printer;
+$printer->singleParameterOnOneLine = true;
+
+
+$function = new Nette\PhpGenerator\GlobalFunction('singleFunction');
+$function
+	->setReturnType('array')
+	->addParameter('foo')
+		->addAttribute('Foo');
+
+Assert::match(<<<'XX'
+	function singleFunction(#[Foo] $foo): array
+	{
+	}
+
+	XX, $printer->printFunction($function));
+
+
+$method = new Nette\PhpGenerator\Method('singleMethod');
+$method
+	->setPublic()
+	->setReturnType('array')
+	->addParameter('foo')
+		->addAttribute('Foo');
+
+Assert::match(<<<'XX'
+	public function singleMethod(#[Foo] $foo): array
+	{
+	}
+
+	XX, $printer->printMethod($method));
+
+
+$method = new Nette\PhpGenerator\Method('singleMethod');
+$method
+	->setPublic()
+	->setReturnType('array')
+	->addPromotedParameter('foo')
+		->setPublic();
+
+Assert::match(<<<'XX'
+	public function singleMethod(public $foo): array
+	{
+	}
+
+	XX, $printer->printMethod($method));