Re: How to disable multi-line string literal in c-mode and c++-mode?

[Alan Mackenzie <acm@muc.de>]

Hi,

On Tue, Aug 18, 2009 at 08:21:01AM -0700, wewwew wrote:
> Hi,

> How can I disable multi-line string literals in c-mode and c++-mode,
> and treat the end of line as the end of string literal?

This is not simple.  CC Mode uses the "syntax mechanism" of Emacs (See
the chapter "Syntax Tables" in the Elisp manual if you're interested),
which does things like matching up parentheses, recognising comments and,
in particular, recognising strings.

To modify this string recognition, you'd have to identify the EOLs which
act as string terminators and individually mark them as such (by giving
them a "string" syntax-table property).

You would need to modify CC Mode (by adding this option) to achieve this.

> I am programming using noweb, where LaTeX and C++ sources are mixed
> together.  When editing the code part, the buffer uses c++-mode, but
> any single quote in the text is treated as start or end of string
> literal, so many of my code chunks are rendered as string literals.  I
> would like to disable this multi-line string literals in c++-mode.

I don't know noweb.  Is there any easy and reliable way to recognise the
LaTeX bits within the source file?  If so, maybe the mechanism used to
neutralize lines like

    #define QUOTE "

could be adapted.  The above, fully legitimate, line used to cause the
following lines to be fontified as strings. 

> Appreciate any help.

> -Wenguang

-- 
Alan Mackenzie (Nuremberg, Germany).