Weird compiler bug ( comment affects compilation )

[xerxes1986]

Hi,

I have run into a weird bug with compiling some C++ code. I am trying to forward declare a class using code like this:

CTestboard tb;

And it doesn't compile, but if I add a comment to the end that has an exclamation point, it does (nothing else is changed):

CTestboard tb; //!



I thought the compiler completely ignored comments as if they weren't even there...what could possibly be causing this?

[kooth]

What error are you getting when you don't have the comment in your file? It could be a misplaced comment somewhere else perhaps?

[vlad from moscow]

@xerxes1986

And it doesn't compile, but if I add a comment to the end that has an exclamation point, it does (nothing else is changed):

CTestboard tb; //!

It is very interesting what will be if you substitute the exclamation mark for an interrogative mark in the comment? :)

[xerxes1986]

If you substitute any other character, it doesn't work. I tried using a ?

This is very strange...

[viliml]

Indeed very strange.........

[zb0S216C]

xerxes1986 wrote:

"I am trying to forward declare a class using code like this:

CTestboard tb;"

That isn't a forward declaration, but a object declaration; the two are different. This is a forward declaration:

class CTestboard;

I'm surprised nobody pointed that out.

As for you error, I assumed it could be a digraph or trigraph, but no of them match. I suspect the problem is with the code itself, and not the comment. I don't think it's a bug, because my compiler doesn't care; even old GCC compilers accept it.

_Wazzak