* regex.h (RE_SYNTAX_EMACS): Add RE_CHAR_CLASSES and RE_INTERVALS

to Emacs' syntax.  Also fix the comment about set/not-set meanings
since Emacs syntax is not the value 0 any more.
* search.c (compile_pattern_1): Remove RE_CHAR_CLASSES from the syntax
since it's now part of RE_SYNTAX_EMACS.

3 files changed, 14 insertions, 5 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 793d8f49d61..3b28faa0750 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,11 @@
+2000-02-14  Stefan Monnier  <monnier@cs.yale.edu>
+
+        * regex.h (RE_SYNTAX_EMACS): Add RE_CHAR_CLASSES and RE_INTERVALS
+        to Emacs' syntax.  Also fix the comment about set/not-set meanings
+        since Emacs syntax is not the value 0 any more.
+        * search.c (compile_pattern_1): Remove RE_CHAR_CLASSES from the syntax
+        since it's now part of RE_SYNTAX_EMACS.
+
 2000-02-12  Dave Love  <fx@gnu.org>
 
         * frame.h (SELECTED_FRAME): Use NULL, not 0 to avoid warnings on
diff --git a/src/regex.h b/src/regex.h
index 36775d567aa..b39fc1e770e 100644
--- a/src/regex.h
+++ b/src/regex.h
@@ -32,8 +32,9 @@
 
 
 /* The following bits are used to determine the regexp syntax we
-   recognize.  The set/not-set meanings are chosen so that Emacs syntax
-   remains the value 0.  The bits are given in alphabetical order, and
+   recognize.  The set/not-set meanings where historically chosen so
+   that Emacs syntax had the value 0.
+   The bits are given in alphabetical order, and
    the definitions shifted by one from the previous bit; thus, when we
    add or remove a bit, only one other definition need change.  */
 typedef unsigned reg_syntax_t;
@@ -153,9 +154,9 @@ extern Lisp_Object re_match_object;
 
 /* Define combinations of the above bits for the standard possibilities.
    (The [[[ comments delimit what gets put into the Texinfo file, so
-   don't delete them!)  */ 
+   don't delete them!)  */
 /* [[[begin syntaxes]]] */
-#define RE_SYNTAX_EMACS 0
+#define RE_SYNTAX_EMACS (RE_CHAR_CLASSES | RE_INTERVALS)
 
 #define RE_SYNTAX_AWK                                                   \
   (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL                       \
diff --git a/src/search.c b/src/search.c
index 3111548af58..31c9398c761 100644
--- a/src/search.c
+++ b/src/search.c
@@ -167,7 +167,7 @@ compile_pattern_1 (cp, pattern, translate, regp, posix, multibyte)
   cp->posix = posix;
   cp->buf.multibyte = multibyte;
   BLOCK_INPUT;
-  old = re_set_syntax (RE_SYNTAX_EMACS | RE_CHAR_CLASSES
+  old = re_set_syntax (RE_SYNTAX_EMACS
                        | (posix ? 0 : RE_NO_POSIX_BACKTRACKING));
   val = (char *) re_compile_pattern ((char *)raw_pattern,
                                      raw_pattern_size, &cp->buf);