Re: Request for build feedback

From:
Victor Bazarov <v.bazarov@comcast.invalid>
Newsgroups:
comp.lang.c++
Date:
Mon, 26 Aug 2013 17:38:07 -0400
Message-ID:
<kvghs0$5e0$1@dont-email.me>
On 8/26/2013 5:30 PM, woodbrian77@gmail.com wrote:

On Monday, August 26, 2013 3:52:47 PM UTC-5, Barry Schwarz wrote:

When the compiler is parsing the source into tokens, it is required to
go as far as possible (an approach called maximum munch). The
compiler must include the next character in the current token if doing
results in a valid token. The classic example is

     a = b+++c;

The compiler is required to process this as

     a = b++ + c;

and not

     a = b + ++c;


What about templates and > ?
It's not required to have a space between >'s
in 2011 C++:

::std::deque<::std::deque<int>> hi;

That seems to be an exception to maximal munching.


Why? No exception. It eats both > symbols as a single token and then
the compilation allows using it to close two opening angle brackets at
the same time. Of course if you had a template

    template<int i> struct myT { bool operator >(int) const; };

you can't write

    int i;
    myT<42>> i;

because the >> is interpreted as a double closing bracket and not as two
separate tokens: one closing bracket and one operator greater-than sign.
  Probably. I didn't try it.

V
--
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