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digitalmars.D.announce - [Blog post] Operator overloading for structs in D

reply Minas Mina <minas_0 hotmail.co.uk> writes:
I have written a blog post about operator overloading for structs.

You can find it here: 
https://www.reddit.com/r/programming/comments/4m8mgr/operator_overloading_for_structs_in_d/

Comments and suggestions are appreciated.
Jun 02 2016
next sibling parent reply Steven Schveighoffer <schveiguy yahoo.com> writes:
On 6/2/16 2:34 PM, Minas Mina wrote:

 I have written a blog post about operator overloading for structs.

 You can find it here:
 https://www.reddit.com/r/programming/comments/4m8mgr/operator_overloading_for_structs_in_d/


 Comments and suggestions are appreciated.


Cool. You missed one very significant thing. That is using mixins to 
take advantage of the operator string.

For example, opOpAssign can be done in one step:

ref Rational opOpAssign(string op)(auto ref Rational r)
     if(op == "+" || op == "-" || op == "/" || op == "*")
{
     mixin("auto tmp = this " ~ op ~ " r;");
     _n = tmp.n;
     _d = tmp.d;
     return this;
}

This is the whole reason, BTW, that operator overloads were changed from 
the original D1 style versions.

Some more examples of your Rational type in action would be good too.

-Steve
Jun 02 2016
parent Minas Mina <minas_0 hotmail.co.uk> writes:
On Thursday, 2 June 2016 at 18:55:36 UTC, Steven Schveighoffer 
wrote:

 On 6/2/16 2:34 PM, Minas Mina wrote:

 [...]


 Cool. You missed one very significant thing. That is using 
 mixins to take advantage of the operator string.

 For example, opOpAssign can be done in one step:

 ref Rational opOpAssign(string op)(auto ref Rational r)
     if(op == "+" || op == "-" || op == "/" || op == "*")
 {
     mixin("auto tmp = this " ~ op ~ " r;");
     _n = tmp.n;
     _d = tmp.d;
     return this;
 }

 This is the whole reason, BTW, that operator overloads were 
 changed from the original D1 style versions.

 Some more examples of your Rational type in action would be 
 good too.

 -Steve


Thanks for the feedback! I will update the post tomorrow or on 
Saturday.
Jun 02 2016
prev sibling parent reply Walter Bright <newshound2 digitalmars.com> writes:
On 6/2/2016 11:34 AM, Minas Mina wrote:

 I have written a blog post about operator overloading for structs.

 You can find it here:
 https://www.reddit.com/r/programming/comments/4m8mgr/operator_overloading_for_structs_in_d/


 Comments and suggestions are appreciated.


Things usually go better on Reddit if you post as the first comment a summary
of 
what the article is about.

Also, if you post your own articles, Reddit is likely to put you on their 
auto-ban list :-(
Jun 02 2016
parent reply Minas Mina <minas_0 hotmail.co.uk> writes:
On Thursday, 2 June 2016 at 20:53:18 UTC, Walter Bright wrote:

 On 6/2/2016 11:34 AM, Minas Mina wrote:

 I have written a blog post about operator overloading for 
 structs.

 You can find it here:
 https://www.reddit.com/r/programming/comments/4m8mgr/operator_overloading_for_structs_in_d/


 Comments and suggestions are appreciated.


 Things usually go better on Reddit if you post as the first 
 comment a summary of what the article is about.


I'll do it in future posts then :)


 Also, if you post your own articles, Reddit is likely to put 
 you on their auto-ban list :-(


What can I do about this?
Jun 02 2016
parent Mike Parker <aldacron gmail.com> writes:
On Friday, 3 June 2016 at 06:47:40 UTC, Minas Mina wrote:


 Also, if you post your own articles, Reddit is likely to put 
 you on their auto-ban list :-(


 What can I do about this?


Announce the post here and ask someone to post it to reddit for 
you.
Jun 03 2016