Bind variable during directive delimited match.

The existing behavior is: when a situation like @a@(foo)
performs a search for the match for @(foo) in order to
determine the extent of the text matched by variable a, the
variable a is not bound. That is to say, @(foo) is tried in an
environment in which a doesn't exist.  The variable is only
bound when the search succeeds, and then @(foo) is processed
again, with the variable now available.

The new behavior is that @(foo) is tested in an environment
in which a is bound. The variable's value is bound to the
range of text between the original position and the tested
position where @(foo) is tried.

This is subject to the copatibility option.

* match.c (ml_bindings_specline_pos): New static function.
(search_match_binding_var): New static function, variant of
search_match.
(h_var): In the var-delimited-by-directive case, perform
the search using search_match_binding_var, unless <= 172
compatibility is requested.

* txr.1: Compatibility note added.

0 files changed, 0 insertions, 0 deletions