FIX

src/PrettyCSV/CsvLine.php

@@ -49,19 +49,19 @@ class CsvLine extends ArrayObject {
     }
 
     /**
-     * @param string $name
+     * @param string|int $name
      * @return bool
      */
-    private function existsField(string $name): bool {
+    private function existsField(string|int $name): bool {
         return array_key_exists($name, $this->headerList) && !is_null($this->headerList[$name]->getIndex());
     }
 
     /**
-     * @param string $name
+     * @param string|int $name
      * @return mixed
      * @throws ParserException
      */
-    private function getField(string $name): mixed {
+    private function getField(string|int $name): mixed {
         if(!$this->existsField($name)) {
             throw new ParserException("Field '{$name}' not found", $this->currentRow);
         }

src/PrettyCSV/Parsers/BoolParser.php

@@ -24,10 +24,10 @@ class BoolParser implements TypeParserInterface {
 
     /**
      * @param string $data
-     * @return bool
+     * @return bool|null
      * @throws ParserException
      */
-     public function parse(string $data): bool {
+     public function parse(string $data): ?bool {
          $return = filter_var($data, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
          if(is_null($return) && $this->is_strict) throw new ParserException("Cannot parse '{$data}' as bool.");
          return $return;

src/PrettyCSV/Parsers/FloatParser.php

@@ -24,10 +24,10 @@ class FloatParser implements TypeParserInterface {
 
     /**
      * @param string $data
-     * @return float
+     * @return float|null
      * @throws ParserException
      */
-    public function parse(string $data): float {
+    public function parse(string $data): ?float {
         $return = filter_var($data, FILTER_VALIDATE_FLOAT, FILTER_NULL_ON_FAILURE);
         if(is_null($return) && $this->is_strict) throw new ParserException("Cannot parse '{$data}' as float.");
         return $return;

src/PrettyCSV/Parsers/IntParser.php

@@ -24,10 +24,10 @@ class IntParser implements TypeParserInterface {
 
     /**
      * @param string $data
-     * @return int
+     * @return int|null
      * @throws ParserException
      */
-    public function parse(string $data): int {
+    public function parse(string $data): ?int {
         $return = filter_var($data, FILTER_VALIDATE_INT, FILTER_NULL_ON_FAILURE);
         if(is_null($return) && $this->is_strict) throw new ParserException("Cannot parse '{$data}' as int.");
         return $return;