ParametersAcceptorSelector - message for ShouldNotHappenException

phpstan · Jan 9, 2022 · d3c3483 · d3c3483
1 parent a9881e3
commit d3c3483
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/Reflection/ParametersAcceptorSelector.php b/src/Reflection/ParametersAcceptorSelector.php
@@ -37,8 +37,14 @@ public static function selectSingle(
 		array $parametersAcceptors,
 	): ParametersAcceptor
 	{
-		if (count($parametersAcceptors) !== 1) {
-			throw new ShouldNotHappenException();
+		$count = count($parametersAcceptors);
+		if ($count === 0) {
+			throw new ShouldNotHappenException(
+				'getVariants() must return at least one variant.',
+			);
+		}
+		if ($count !== 1) {
+			throw new ShouldNotHappenException('Multiple variants - use selectFromArgs() instead.');
 		}
 
 		return $parametersAcceptors[0];