public function isLambda($index)
    {
        if (!$this->tokens[$index]->isGivenKind(T_FUNCTION)) {
            throw new \LogicException(sprintf('No T_FUNCTION at given index %d, got %s.', $index, $this->tokens[$index]->getName()));
        }

        $startParenthesisIndex = $this->tokens->getNextMeaningfulToken($index);
        $startParenthesisToken = $this->tokens[$startParenthesisIndex];

        // skip & for `function & () {}` syntax
        if ($startParenthesisToken->isGivenKind(CT::T_RETURN_REF)) {
            $startParenthesisIndex = $this->tokens->getNextMeaningfulToken($startParenthesisIndex);
            $startParenthesisToken = $this->tokens[$startParenthesisIndex];
        }

        return $startParenthesisToken->equals('(');
    }
public function isLambda($index)
    {
        if (!$this->tokens[$index]->isGivenKind(T_FUNCTION)) {
            throw new \LogicException(sprintf('No T_FUNCTION at given index %d, got %s.', $index, $this->tokens[$index]->getName()));
        }

        $startParenthesisIndex = $this->tokens->getNextMeaningfulToken($index);
        $startParenthesisToken = $this->tokens[$startParenthesisIndex];

        
        if ($startParenthesisToken->isGivenKind(CT::T_RETURN_REF)) {
            $startParenthesisIndex = $this->tokens->getNextMeaningfulToken($startParenthesisIndex);
            $startParenthesisToken = $this->tokens[$startParenthesisIndex];
        }

        return $startParenthesisToken->equals('(');
    }
public function isLambda ( $ index ) { if ( ! $ this -> tokens [ $ index ] -> isGivenKind ( T_FUNCTION ) ) { throw new \ LogicException ( sprintf ( 'No T_FUNCTION at given index %d, got %s.' , $ index , $ this -> tokens [ $ index ] -> getName ( ) ) ) ; } $ startParenthesisIndex = $ this -> tokens -> getNextMeaningfulToken ( $ index ) ; $ startParenthesisToken = $ this -> tokens [ $ startParenthesisIndex ] ; // skip & for `function & () {}` syntax if ( $ startParenthesisToken -> isGivenKind ( CT :: T_RETURN_REF ) ) { $ startParenthesisIndex = $ this -> tokens -> getNextMeaningfulToken ( $ startParenthesisIndex ) ; $ startParenthesisToken = $ this -> tokens [ $ startParenthesisIndex ] ; } return $ startParenthesisToken -> equals ( '(' ) ; }
Check if the function under given index is a lambda.

@param int $index

@return bool
Check if the function under given index is a lambda .