[Developers] quoting in ccl-file strings

[Jonathan Thornburg]

In a recent message to this list, I proposed the rules

> * A string is delimited by either single-quotes ('...')
>  or double-quotes ("...").
> * Within a string delimited by single-quotes, double-quotes may be
>  used with no need for special quoting
> * Within a string delimited by double-quotes, single-quotes may be
>  used with no need for special quoting
> * Backslash quotes the next character, i.e.
>  * \' gives a single-quote character without delimiting the string
>  * \" gives a double-quote character without delimiting the string
>  * \\ gives a backslash character in the string

for string quoting in par files.


In this message I'd like to address the related issue of string quoting
in ccl files.  As a design principle, I'd say it makes sense to use a
consistent set of rules across all of Cactus, i.e. I'd like to propose
the same set of rules for CCL files.

As an implementation bug...  try putting the string
    "compute $\partial_x \beta$"
in a CCL string, and you'll discover that the current CST dumps that
verbatim into a C string... and \p and \b aren't legal in a C string.
Oops.

ciao,

-- 
-- Jonathan Thornburg <jthorn at aei.mpg.de>
    Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut),
    Golm, Germany, "Old Europe"     http://www.aei.mpg.de/~jthorn/home.html
    "Washing one's hands of the conflict between the powerful and the
     powerless means to side with the powerful, not to be neutral."
                                       -- quote by Freire / poster by Oxfam