Building C++ modules

[Patrick Schluter]

On Tuesday, 13 August 2019 at 15:21:56 UTC, H. S. Teoh wrote:
> On Tue, Aug 13, 2019 at 11:19:16AM +0200, Jacob Carlborg via 
> Digitalmars-d wrote:
>> [...]
>
> It's not so simple.  The problem is that in C++, the 
> *structure* of the parse tree changes depending on previous 
> declarations. I.e., the lexical structure is not context-free.  
> For example, given this C++ code:
>
> [...]

I love the

     fon< fun< 1 >>::three >::two >::one

expression in C++ from Jens Gustedt's blog [1]

There the expression means something different in C++98 than in 
C++11

Let’s have a look how this expression is parsed
	
1  fon< fun< 1 >>::three >::two >::one    // in C++98
2            -----------
3       -----------------------
4  -----------------------------------
5
	
1  fon< fun< 1 >>::three >::two >::one    // in C++11
2       --------
3  ---------------------
4  ----------------------------
5  -----------------------------------


[1]: 
https://gustedt.wordpress.com/2013/12/18/right-angle-brackets-shifting-semantics/#more-2083