Is defines inside a class private to that class?

Question

If I write something such as this:

class myclass { #define ADD(x,y) {return x+y} public: }

is the define private to my class?

note that I am defining it in *.hpp and I want to make sure that if I include this hpp to another source code, the other source code don't have access to this define.

Is there any better solution than using #define in C++ which can do the same thing?

What about using? is it private to my class or not?

class myclass { using std; public: }

Possible duplicate of: stackoverflow.com/questions/6379489/… — DeathTails
– DeathTails, Commented Jun 28, 2016 at 16:08
@DeathTails Thanks, that one if for C, and this is for c++, are they the same? — mans
– mans, Commented Jun 28, 2016 at 16:10
In this case, yes. The answer, and the reasons behind it, are exactly the same. — Paul Roub
– Paul Roub, Commented Jun 28, 2016 at 16:13
@PaulRoub Think we should dual tag that Q to use it as a dupe target for both languages? — NathanOliver
– NathanOliver, Commented Jun 28, 2016 at 16:16
Please only ask one question per question. The question on using using should be its owns question. — NathanOliver
– NathanOliver, Commented Jun 28, 2016 at 16:36

Aganju · Accepted Answer · 2016-06-28 16:11:49Z

It is not, and can never be.

All preprocessor commands (#...) are processed before the source code is ever read and analyzed, so it does not matter at all where you put them; only the sequence (if they build on each other) and the relative position to their usage (before/after) matters.

You can imagine preprocessor commands to be something like a 'find/replace from here on'.

tanikaze · Accepted Answer · 2016-07-11 18:38:09Z

You may use #undef to limit the scope of a #define. Perhaps you could even use it to limit the scope of a define which you yourself did not create.

Collectives™ on Stack Overflow

Is defines inside a class private to that class?

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related