Fix class detection in double-quoted strings and heredoc

Author: c01l

SlevomatCodingStandard/Helpers/ReferencedNameHelper.php

@@ -35,6 +35,9 @@
 use const T_HEREDOC;
 use const T_IMPLEMENTS;
 use const T_INSTANCEOF;
+use const T_NAME_FULLY_QUALIFIED;
+use const T_NAME_QUALIFIED;
+use const T_NAME_RELATIVE;
 use const T_NAMESPACE;
 use const T_NEW;
 use const T_NS_SEPARATOR;
@@ -51,6 +54,7 @@
 use const T_TYPE_UNION;
 use const T_USE;
 use const T_VARIABLE;
+use const T_WHITESPACE;
 
 /**
  * @internal
@@ -494,6 +498,31 @@ private static function getReferencedNamesFromString(string $content): array
 				}
 
 				$referencedNames[] = $referencedName;
+			} elseif (is_array($token) && $token[0] === T_NEW) {
+				$referencedName = '';
+				$tmpPosition = $position + 1;
+				while (true) {
+					if (!is_array($subTokens[$tmpPosition])) {
+						break;
+					}
+					if ($subTokens[$tmpPosition][0] === T_WHITESPACE) {
+						$tmpPosition++;
+						continue;
+					}
+					if (!in_array(
+						$subTokens[$tmpPosition][0],
+						[T_STRING, T_NS_SEPARATOR, T_NAME_QUALIFIED, T_NAME_FULLY_QUALIFIED, T_NAME_RELATIVE],
+						true
+					)) {
+						break;
+					}
+
+					$referencedName .= $subTokens[$tmpPosition][1];
+					$tmpPosition++;
+				}
+				if ($referencedName !== '') {
+					$referencedNames[] = $referencedName;
+				}
 			}
 		}
 

tests/Helpers/ReferencedNameHelperTest.php

@@ -76,7 +76,9 @@ public function testGetAllReferencedNames(): void
 			['EnumType', false, false],
 			['UrlGeneratorInterface', false, false],
 			['ClassInHeredoc', false, false],
+			['\Some\OtherClassInHeredoc', false, false],
 			['ClassInDoubleQuote', false, false],
+			['\Some\OtherClassInDoubleQuote', false, false],
 			['object', true, false],
 			['DateTime', false, false],
 			['DateTimeImmutable', false, false],

tests/Helpers/data/lotsOfReferencedNames.php

@@ -196,10 +196,12 @@ public function generateRoute($router): string
 
 <<<XML
 	<string>Hello world and {$this->wrap(ClassInHeredoc::EXAMPLE)}</string>
+    {$_(new \Some\OtherClassInHeredoc())}
 XML;
 
 "foo {$db->quote(ClassInDoubleQuote::SOME_CONSTANT)}";
 "foo $db->quote(FakeClassInDoubleQuote::SOME_CONSTANT)";
+"{$_(new \Some\OtherClassInDoubleQuote ?? "")}";
 
 $script .= "// @see \Foo\Bar::func()
 		\$hasDefaultValue = $hasDefaultValue;

tests/Sniffs/Namespaces/UnusedUsesSniffTest.php

@@ -70,6 +70,10 @@ public function testUnusedUse(): void
 		self::assertNoSniffError($report, 30);
 		self::assertNoSniffError($report, 31);
 
+		// Used class inside a string or heredoc
+		self::assertNoSniffError($report, 31);
+		self::assertNoSniffError($report, 32);
+
 		self::assertNoSniffError($report, 91);
 	}
 

tests/Sniffs/Namespaces/data/unusedUses.php

@@ -29,6 +29,8 @@
 use ClassWithStaticVariable;
 use ClassWithConstant;
 use function Psl\Type\null;
+use InstantiableClass1;
+use InstantiableClass2;
 
 class TestClass implements FirstInterface, SecondInterface
 {
@@ -60,6 +62,11 @@ enum_type: EnumClass::VALUE(),
 
 		echo "test {$wrapper->escape(ClassWithConstant::FOO)}";
 
+		echo "{$_(new InstantiableClass1())}";
+		echo <<<DOC
+{$_(new InstantiableClass2())}
+DOC;
+
 		return new NewObject();
 	}