##  #use "macro.ml" .##    
##. Camlmix.printer := ignore .##
Ocaml quotations are delimited by either of the following
two character sequences (shown here with an extra # symbol
to avoid triggering a quotation):
   ###  or ###.    initiate Ocaml interpretation, while
   ###  or .###    resume text mode.
  
   ###. causes white space to the left to be removed from the output, while
   .### similarly removes all white space followed by a newline to the right.

   The delimiters chosen will cause the C comment to be the first line in
   the output.

   Two or more # symbols can be placed in the text by adding one extra
   # character, as seen above.

   Let's turn printing back on.
## Camlmix.printer := print .##
##..##
## let source = "Makefile" .##    
/* add some text here: ##= some_text .##
 - note the newline was ignored!
   Check whether
   2 ###.    .###    ###    A###    ###A
   3 ####.   .####   ####   A####   ####A
   4 #####.  .#####  #####  A#####  #####A
   5 ######. .###### ###### A###### ######A
   are emitted correctly.
*/

int main() {
    int   i     = ##= string_of_int (3 + 17) (* i.e., 20 *) ##;
    ##. Camlmix.printer := ignore .##
    This text will be ignored.
    ## Camlmix.printer := print
    .##
    char* which = "verbatim: ### ##### ### ###= source ####";
    ##.(*
    This text is part of an Ocaml comment.
    The # symbols in the char assignment above are printed,
    allbeit with one of each # symbols in a contiguous sequence removed.

    Note that we allow this comment to produce a newline in the output.*)##
    return 0;
}