Re: [jed-users] word chars

[jed@xxxxxxxxxxx (John E. Davis)]

Hi Peter,

Peter D. Gray <pdg@xxxxxxxxxx> wrote:
> I have tried a simple word_chars = 'char list'

As others have stated, you need to use the define_word function.  It
takes a single string expression that defines the characters that
should be treated as a word by the delete_word, upcase_word,
skip_word, etc functions.

You most likely saw a syntax error because slang strings require
double quotes, e.g., "char list" and not 'char list'.

The string that the define_word function takes may consist of a
combination of character ranges such as `A-Z' and character classes:

    \w matches a unicode "word" character, taken to be alphanumeric.
    \a alphabetic character, excluding digits
    \s matches whitespace
    \l matches lowercase
    \u matches uppercase
    \d matches a digit
    \, matches punctuation
    \\ matches a backslash
    \^ matches a ^ character

  If the first character of a set is `^' then the set is taken to
  be the complement set.

The default setting for word characters is \w.  Note that when used in
slang code, the backslash character must be escaped:

   define_word ("\\w");

Alternatively, you can use one of these forms:

   define_word ("\w"R);    % a "raw" string
   define_word (`\w`);     % Another form

Finally, note that the word specifier may take a combination such as

   define_word (`-A\a\d_`);  % hyphen + alphabetic + digits + underschore
   define_word (`^\s`);      % Anything but whitespace

Note the placement of the hyphen character in the first example.  If
you want to include a hyphen, make it the first character in the
string to avoid it be interpreted as a range.

I hope this helps.
--John
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