Comments on: The context sensitivity of C’s grammar

By: Yevgen Muntyan

Yevgen Muntyan — Fri, 14 Mar 2008 19:58:10 +0000

Here a simple lookup won’t do:

typedef int A;
void func()
{
A A;
}

By: eliben

eliben — Mon, 26 Nov 2007 04:00:51 +0000

Reddit comment thread:

http://programming.reddit.com/info/61b6c/comments/

By: eliben

eliben — Sat, 24 Nov 2007 16:18:21 +0000

Art:

In fact, there is no ambiguity here. This is definitely a comment start according to the rules of C. The C preprocessor (cpp) handles comment removal, so what the compiler will see is:

{
  int foo, *bar;
  ...
  foo = 3
  ...
}

Which is, of course, an error since the line “foo = 3″ isn’t terminated by a semicolon.

By: Art

Art — Sat, 24 Nov 2007 15:39:33 +0000

I always liked this one:

{
int foo, *bar;
…
foo = 3/*bar; /* division by pointer or comment start? */
…
}