Adapters FunctionExpressionMatcher should return as is if nothing mat…

…ches

src/Adapter/ConstantAdapter.php

@@ -21,7 +21,12 @@ public function __invoke(mixed $value): mixed
 
         $match = new FunctionExpressionMatcher();
 
-        foreach ($match('constant', $value) as $expression) {
+        $expressions = $match('constant', $value);
+        if ([] === $expressions) {
+            return $value;
+        }
+
+        foreach ($expressions as $expression) {
             $evaluated = $this->expressionLanguage->evaluate($expression);
 
             // the evaluation did not end up with a transformation

src/Adapter/DateTimeAdapter.php

@@ -34,7 +34,12 @@ public function __invoke(mixed $value): mixed
 
         $match = new FunctionExpressionMatcher();
 
-        foreach ($match('datetime(_immutable)?', $value) as $expression) {
+        $expressions = $match('datetime(_immutable)?', $value);
+        if ([] === $expressions) {
+            return $value;
+        }
+
+        foreach ($expressions as $expression) {
             // surround named parameters arguments by double quotes
             // so that the named parameter part is not interpreted by the expression language
             // ex. 'format: "Y-m-d"' will be transformed to '"format: \"Y-m-d\""'

src/Adapter/EnumAdapter.php

@@ -21,7 +21,12 @@ public function __invoke(mixed $value): mixed
 
         $match = new FunctionExpressionMatcher();
 
-        foreach ($match('enum', $value) as $expression) {
+        $expressions = $match('enum', $value);
+        if ([] === $expressions) {
+            return $value;
+        }
+
+        foreach ($expressions as $expression) {
             try {
                 $evaluated = $this->expressionLanguage->evaluate($expression);
             } catch (\Throwable $exception) {

src/Adapter/FactoryAdapter.php

@@ -29,7 +29,12 @@ public function __invoke(mixed $value): mixed
 
         $match = new FunctionExpressionMatcher();
 
-        foreach ($match('factory', $value) as $expression) {
+        $expressions = $match('factory', $value);
+        if ([] === $expressions) {
+            return $value;
+        }
+
+        foreach ($expressions as $expression) {
             $evaluated = $this->expressionLanguage->evaluate($expression);
             if ("<$expression>" === $value) {
                 return $evaluated;