On the Regular Expression "help" guide, it says that "\char" means to match that "char" literally. However, when I do this, I get a warning similar to this:

undefined escape sequence \{

What do I do?

> undefined escape sequence \{
> What do I do?

Try to use following sequence

[{]

instead.

I am not sure though will it work or not in this particular implementation.

Andrew Fedoniouk.
http://terrainformatica.com

Out of curiousity, are your regexp's in WYSIWYG strings or escaped (aka double-quoted) strings?  If using escaped strings, that could be the problem.

-- Chris Sauls

In article <ctk8pt$a54$1@digitaldaemon.com>, kinghajj says...
>
>On the Regular Expression "help" guide, it says that "\char" means to match that "char" literally. However, when I do this, I get a warning similar to this:
>
>undefined escape sequence \{
>
>What do I do?

kinghajj wrote:

[...]
> undefined escape sequence \{
> What do I do?

Seems you want to esacpe the escape character "\" by writing "\\" instead.

Because first the lexical phase scans your source into tokens the character seqence " \{" is recognized as space followed by the escape sequence '\{', which has no meaning to the lexical phase.

But the character sequence " \\{" is recognized as space followed by '\\' and '{' from which '\\' is recognized as valid escape sequence with the meaning '\'. Therefore the chracters " \{" are passed to the RE-programs which then can recognize the "\{" as escaped sequence.

-manfred