When obj is T *, then the meaning is the same as (*obj).data and you cannot overload the -> operator. But according to Stroustrup he thought of several sensible resolutions for operator. What is Apache Hadoop? share|improve this answer answered Jul 30 '13 at 17:26 Marshall Clow 5,635826 9 The same reasoning holds for && and ||, which you can overload. –James Kanze Jul 30 '13 http://softwaredevelopercertification.com/cannot-be/why-we-cannot-overload-operator.php
asked 7 years ago viewed 19301 times active 8 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Linked 0 Why can't we have same return type as . operator, it wouldn't serve any purpose. obj->data is defined as (*obj).data, so overloading it is basically equivalent to overloading the dereferencing operator. –filmor Mar 15 '11 at 18:08 9 @TommyA: There is a subtle, but significant What is Big Data Analytics?
Why Some Operators Cannot Be Overloaded In C++
I did see the the question linked as a potential duplicate, but did not find any responses there that answered my question. –Paul Renton Jul 30 '13 at 17:30 add a Overloading the -> operator allows for reference counted pointers to be created such as boost::shared_ptr. Consider:
X a; X* p = &a; X* q = &a; p++; // p points to a // thus the integer value of p must be // sizeof(X) larger than the
Solving a discrete equation I am seen in darkness and in light, What am I? That is, operator overloading can apply only to your own classes. How to handle a common misconception when writing a Master's thesis? Which Operator Cannot Be Overloaded In C++ Using Friend Function OneStopTesting.com - Testing EBooks, Tutorials, Articles, Jobs, Training Institutes etc.
I wanted an extensible language, not a mutable one. Operators That Cannot Be Overloaded In C++ mean?) –David Rodríguez - dribeas Mar 15 '11 at 18:25 @Tim: no, we don't have the same problem with a+b. You'd have needed additional grammar rules just for this token. –James Kanze Jul 30 '13 at 17:50 1 @JamesKanze: I was editing to cover that. share|improve this answer edited Mar 15 at 17:51 T.J.
Dipak Patel Sunday, April 03, 2011 12:57 PM Reply | Quote Answers 2 Sign in to vote I can only offer guesses here: dot operator: For sanity and safety sake. Operators Cannot Be Overloaded In C# The reason for overloading operators is to provide intuitive syntax to the user of your class. OneStopSAP.com - SAP EBooks, Tutorials, Articles, FAQs, Jobs, Training Institutes etc. is an explicit parallel with operator->.
Operators That Cannot Be Overloaded In C++
Defining ?: as a token (even though it's only used in one place) isn't exactly rocket science. How to handle swear words in quote / transcription? Why Some Operators Cannot Be Overloaded In C++ What is the impact of Big Data on Real estate Industry? Why Scope Resolution Operator Cannot Be Overloaded And there's nothing today which would prevent compilers from warning about the practice. (But it's not black and white.
What is the significance of the robot in the sand? this page and a pony. –Anycorn Mar 15 '11 at 18:02 | show 10 more comments 6 Answers 6 active oldest votes up vote 16 down vote accepted To quote Bjarne Stroustrup: There What is the impact of Big Data on Healthcare Industry? I can think of none. Why Can't We Overload Some Operators In C++
And why we can't overload the C++ operators :: and .*. ? Crowder 490k81781915 answered Feb 6 '09 at 12:07 Anton Gogolev 78.5k27148247 Full quote from TDaEoC++ in my answer. –ddaa Feb 6 '09 at 12:11 9 I am tempted Why does top 50% need a -50% translate offset? http://softwaredevelopercertification.com/cannot-be/what-are-all-the-operators-cannot-be-overloaded.php share|improve this answer answered Jul 30 '13 at 17:28 DUman 1,16258 add a comment| up vote 1 down vote The short and accurate answer is simply "because that's what Bjarne decided."
Why Big Data is becoming so important? Why Dot Operator Cannot Be Overloaded Thus he added operator overloading as feature in C++ so that programmers can define functionality of operators for user defined data types. There is simply no way to write a function in C++ that selectively evaluates its parameters.
That said there are no technical reasons I am aware of that prevented these operators from being overloaded.
Hindsight is a wonderful thing. For operator . Name :* Email Id :* Answer :* Verification Code Not readable? We Can Change The Basic Meaning Of An Operator In C++ For example, it makes sense to overload + and += for strings.
You can't simulate this with an overloaded operator. Sharepoint 2013: Rest API - does header need to include X-RequestDigest? 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 useful reference Are keywords in resolv.conf case sensitive?
overloads and could not choose between them. –Steve Jessop Mar 15 '11 at 18:40 add a comment| up vote 7 down vote If you overload ., how would you access class If you overload both (. Do we need one to handle Big Data? Privacy statement Dev Centers Windows Office More...
Furniture name for waist-high floor-sitting shelf cabinet thing How do I deal with my current employer not respecting my decision to leave? Category Operators in C++ Interview Questions & Answers - Exam Mode / Learning Mode Rating (3.5) By 97 users Added on 8/18/2011 Views 6059 Rate it! * * * * * I looked for an explanation as to why in C++ Operator Overloading but did not find one describing why this isn't possible. Browse other questions tagged c++ operator-overloading or ask your own question.
operator then we cant access member in normal way for that we have to use ->. These arguments are weighty, but not conclusive. I just didn't see the need to introduce the special case of overloading a ternary operator. It doesn't arise with operator+ overloads, or even with operator-> overloads (in which you follow the indirection to the end, then look for members).
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