Adding a new escape sequence B'...': If the string between

the delimiters is a valid numeric expression, return the character
`1', and `0' otherwise.  This is an analogon to A.

* src/roff/troff/input.cc (do_expr_test): Implement it.
(token::next): Use it.
* src/roff/troff/troff.man, NEWS, man/groff.man: Document it.

* tmac/tmac.trace: Made independent from escape character.


Adding a new request .dei: define indirect.  The first and second
parameter of .dei are taken from string registers instead directly;
this very special request is needed to make tmac.trace independent
from the escape character (which might even be disabled).

* src/roff/troff/input.cc (do_define_macro): Implement it.
(define_macro_indirect): New function.
(init_input_requests): Use it.

Adding two requests .ecs and .ecr: Save and restore the escape
character.  These two requests are needed to make tmac.trace
independent from the escape character (which might even be
disabled).

* src/roff/troff/input.cc (save_escape_char, restore_escape_char):
Implement it.
(init_input_requests): Use it.

* src/roff/troff/troff.man, NEWS, man/groff.man: Updated.

1 files changed, 12 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 3313e99d..1bf93170 100644
--- a/NEWS
+++ b/NEWS
@@ -28,6 +28,18 @@ Two new requests `tm1' and `tmc' have been added to improve writing messages
 to the terminal.  `tm1' is similar to `tm' but allows leading whitespace.
 `tmc' is similar to `tm1' but doesn't emit a final newline.
 
+A new request `dei' (define indirect) has been added.  The first and second
+parameter of `dei' are taken from string registers instead directly; this
+very special request is needed to make `tmac.trace' independent from the
+escape character (which might even be disabled).
+
+It is now possible to save and restore the escape character with two new
+requests `ecs' and `ecr'.
+
+The new escape sequence \B'...' is an analogon to `\A': If the string within
+the delimiters is a valid numeric expression, return character `1', and `0'
+otherwise.
+
 grops
 -----