EarlyExitSniff: Fixed false positive

Author: kukulich

SlevomatCodingStandard/Sniffs/ControlStructures/EarlyExitSniff.php

@@ -206,16 +206,32 @@ private function processElseIf(File $phpcsFile, int $elseIfPointer): void
 
 		$allConditionsPointers = $this->getAllConditionsPointers($phpcsFile, $elseIfPointer);
 
+		$elseIfEarlyExitPointer = null;
+		$previousConditionEarlyExitPointer = null;
+
 		foreach ($allConditionsPointers as $conditionPointer) {
-			if ($elseIfPointer === $conditionPointer) {
+			$conditionEarlyExitPointer = $this->findEarlyExitInScope($phpcsFile, $tokens[$conditionPointer]['scope_opener'], $tokens[$conditionPointer]['scope_closer']);
+
+			if ($conditionPointer === $elseIfPointer) {
+				$elseIfEarlyExitPointer = $conditionEarlyExitPointer;
 				break;
 			}
 
-			if (!$this->isEarlyExitInScope($phpcsFile, $tokens[$conditionPointer]['scope_opener'], $tokens[$conditionPointer]['scope_closer'])) {
+			$previousConditionEarlyExitPointer = $conditionEarlyExitPointer;
+
+			if ($conditionEarlyExitPointer === null) {
 				return;
 			}
 		}
 
+		if (
+			$previousConditionEarlyExitPointer !== null
+			&& $tokens[$previousConditionEarlyExitPointer]['code'] === T_YIELD
+			&& $tokens[$elseIfEarlyExitPointer]['code'] === T_YIELD
+		) {
+			return;
+		}
+
 		$fix = $phpcsFile->addFixableError(
 			'Use if instead of elseif.',
 			$elseIfPointer,

tests/Sniffs/ControlStructures/data/earlyExitNoErrors.php

@@ -193,9 +193,20 @@ function allConditionsWithEarlyExitButCodeAfter($dateTime) {
 
 function twoYields(bool $flag)
 {
-    if ($flag) {
-        yield 1;
-    } else {
-        yield 2;
-    }
+	if ($flag) {
+		yield 1;
+	} else {
+		yield 2;
+	}
+}
+
+function manyYields(bool $flag)
+{
+	if ($flag) {
+		yield 1;
+	} elseif (!$flag) {
+		yield 2;
+	} else {
+		yield 3;
+	}
 }