Re: thoughts on martin's proposed patch for GCC and UTF-8

[Andreas Schwab <schwab at issan dot informatik dot uni-dortmund dot de>]

Richard Stallman <rms@gnu.org> writes:

|>     For reference, here are the draft C9x pragmas and what they do.
|> 
|> These arithmetic parameters should not be done with #pragma, not with
|> any kind of #-command.  That is because macro expansions cannot
|> produce a #-command.

That's why C9x has the Pragma operator.

       6.10.9  Pragma operator

       Semantics

       [#1] A unary operator expression of the form:

               _Pragma ( string-literal  )

       is processed as follows: The string literal is  destringized
       by  deleting  the L prefix, if present, deleting the leading
       and trailing double-quotes, replacing each  escape  sequence
       \"  by a double-quote, and replacing each escape sequence \\
       by a single backslash.  The resulting sequence of characters
       is   processed   through  translation  phase  3  to  produce
       preprocessing tokens that are executed as if they  were  the
       pp-tokens   in   a  pragma  directive.   The  original  four
       preprocessing tokens in the unary  operator  expression  are
       removed.

-- 
Andreas Schwab                                      "And now for something
schwab@issan.cs.uni-dortmund.de                      completely different"
schwab@gnu.org