Translator: improved Expression usage

src/Dibi/Translator.php

@@ -316,7 +316,11 @@ final class Translator
 		if ($modifier) {
 			if ($value !== null && !is_scalar($value)) {  // array is already processed
 				if ($value instanceof Literal && ($modifier === 'sql' || $modifier === 'SQL')) {
-					$modifier = 'SQL';
+					return (string) $value;
+
+				} elseif ($value instanceof Expression && $modifier === 'ex') {
+					return $this->connection->translate(...$value->getValues());
+
 				} elseif ($value instanceof \DateTimeInterface && ($modifier === 'd' || $modifier === 't' || $modifier === 'dt')) {
 					// continue
 				} else {

tests/dibi/Translator.phpt

@@ -507,6 +507,18 @@ Assert::same(
 );
 
 
+Assert::same(
+	reformat('SELECT * FROM [table] WHERE (([left] = 1) OR ([top] = 2)) AND (number < 100)'),
+	$conn->translate('SELECT * FROM `table` WHERE %and', [
+		new Dibi\Expression('%or', [
+			'left' => 1,
+			'top' => 2,
+		]),
+		new Dibi\Expression('number < %i', 100),
+	])
+);
+
+
 $e = Assert::exception(function () use ($conn) {
 	$array6 = [
 		'id' => [1, 2, 3, 4],