Hi Mike,
On 1 Oct 2010, at 11:00, Mike Gran wrote:
> I need to avoid processing
> a curly bracket that appears inside a string, as in the
> following
>
> (set! str
> m4_ifdef({USE_REGEX},
> {" } "},
> {" > "}))
This is what changequote was designed for. If you want to avoid
using it, then you can either pick a different quote character,
perhaps using a multi-character string to avoid clashing with
legitimate uses by the surrounding text -- maybe something like
m4_changequote(,)
m4_changequote({:,:})
or you could have a post-processing stage that substitutes unlikely
strings when m4 has finished, like Autoconf does with quadrigraphs:
m4_ifdef({USE_REGEX},
{" @:)@ "},
{" > "}))
m4 source-file.m4 | sed 's|@:)@|}|g;s|@(:@|{|g' > out-file.scm
Cheers,
--
Gary V. Vaughan ([email protected])
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