EOL_SPAN_REGEXP rule is similar to the
EOL_SPAN rule except the match sequence is taken to
be a regular expression. In addition to the attributes supported by the
EOL_SPAN tag, the following attributes are
HASH_CHAR - a literal string which must
be at the start of a regular expression.
HASH_CHARS - a list of possible literal
characters, one of which must match at the start of the regular
attributes are both optional, but you may only specify one, not both. If
both are specified,
HASH_CHARS is ignored and an
error is shown. Whenever possible, use a literal prefix to specify a
EOL_SPAN_REGEXP. If the starting prefix is always the
HASH_CHAR and provide as much prefix as
possible. Only in rare cases would you omit both attributes, such as the
case where there is no other reliable way to get the highlighting you
need, for example, with comments in the Cobol programming
The regular expression match cannot span more than one line.
Regular expression syntax is described in Appendix E, Regular Expressions.
Here is an
EOL_SPAN_REGEXP that highlights
MS-DOS batch file comments, which start with
followed by any whitespace character, and extend until the end of the
<EOL_SPAN_REGEXP AT_WHITESPACE_END="TRUE" HASH_CHAR="REM" TYPE="COMMENT1">REM\s</EOL_SPAN_REGEXP>