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Cannot Use Dynamic Cast

void func( const Base* const obj){ Derived* der = dynamic_cast(obj); } But it shows error because dynamic cast cannot cast away const specifier. Safe is better than insecure. -- Sutter and Alexandrescu, C++ Coding Standards Programs must be written for people to read, and only incidentally for machines to execute. -- Harold Abelson and My cat sat down on my laptop, now the right side of my keyboard types the wrong characters How do fonts work in LaTeX? Clear is better than cute.

This article explains a similar example: http://www.cplusplus.com/doc/tutorial/typecasting/ share|improve this answer answered Dec 12 '11 at 4:37 Murali Krishna 1466 Dave gave a nice answer. Browse other questions tagged c++ const dynamic-cast const-cast or ask your own question. Do Morpheus and his crew kill potential Ones? Browse other questions tagged generics c++-cli dynamic-cast or ask your own question.

If the types are polymorphic (have at least one virtual function) you should be able to do: const Derived *der = dynamic_cast(obj); share|improve this answer answered May 23 '14 at The usage of "le pays de..." Typesetting text with math Query for highest version Is the result of the general election final on 8th of Nov, 2016? The compiler is saying that the following code is not polymorphic.

Teenage daughter refusing to go to school Would we find alien music meaningful? static_cast vs. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed share|improve this answer answered Dec 12 '11 at 4:37 tenorsax 17.7k93055 add a comment| up vote 8 down vote just make A destructor virtual (always do for any class just for

Is there a word for turning something into a competition? Can I use that to take out what he owes me? How difficult is it to practically detect a forgery in a cryptosystem? read this article share|improve this answer edited Jun 16 '13 at 3:11 answered Jun 16 '13 at 2:57 Johnsyweb 69.7k13113169 I tried catch(std::bad_cast const& ex) as you suggested but get several error

Operator ASCII art A guy scammed me, but he gave me a bank account number & routing number. I changed one method signature and broke 25,000 other classes. c++ const dynamic-cast share|improve this question edited Aug 31 '10 at 2:38 Eclipse 33.7k1290153 asked Aug 31 '10 at 2:37 okami 65321933 add a comment| 2 Answers 2 active oldest votes So as long as you don't have any using directives for boost anywhere but have them for std, the shared_ptr has to come from the standard library or an extension of

Sites: Disneyland vs Disneyworld Query for highest version What is the total sum of the cardinalities of all subsets of a set? http://stackoverflow.com/questions/3605679/cast-const-class-using-dynamic-cast What now? Why does the size of this std::string change, when characters are changed? You may have to register or Login before you can post: click the register link above to proceed.

Copyright Quinstreet Inc. 2002-2016 Either change the variable declaration to const Integer& or change the cast to dynamic_cast(&anotherNodeItem) (and make the variable const). If an image is rotated losslessly, why does the file size change? How to interpret torque spec ranges?

more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation This looks like an abandoned compiler bug connect.microsoft.com/VisualStudio/feedback/details/761208/… –Agnel Kurian Apr 8 '14 at 18:10 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign If it was used on references, the exception std::bad_cast is thrown. 6) When dynamic_cast is used in a constructor or a destructor (directly or indirectly), and expression refers to the object Please help me and show me what I need to do to get the code run as I intended.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Why is this C++ code faster than my hand-written assembly for testing the Collatz conjecture? stdarg and printf() in C Was a massive case of voter fraud uncovered in Florida?

Change it to: dynamic_cast(a).aa(); ...

The base class shall have at least one virtual method. Linked 0 Checking the RTTI 0 C++ == operator for child of abstract base class using shared_ptr Related 1180Regular cast vs. more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation share|improve this answer answered Jul 11 '15 at 22:53 Peter 17.1k21244 Sorry for the incomplete code.

Also, this, on whether you should keep the virtual destructor: parashift.com/c++-faq-lite/virtual-functions.html#faq-20.7 –Merlyn Morgan-Graham Aug 31 '10 at 3:49 add a comment| up vote 1 down vote const Der* der1 = dynamic_cast

Why are password boxes always blanked out when other sensitive data isn't? share|improve this answer answered Jun 28 '13 at 15:39 user993954 17516 6 not for any class but for the class which is intended to be a base class –ParokshaX Mar Why there are no approximation algorithms for SAT and other decision problems? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

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