What does Backslash "\" mean?

monk · 发表于 2022-7-6 07:45:30

In lisp what is the significance of backslash? For example for me to load a command from a DCL button I would write:

(action_tile "MKLINE" "(command "line")(done_dialog)")

I have had a look around and most people say that the character after the backslash is not taken into account?! I am a little foggy.

Thanks

MSasu · 发表于 2022-7-6 08:01:21

Is used in pair with following character to add special characters to strings. The ACTION_TILE function accept a string argument - therefore "\"" allow you to incluse the " character in string. Other examples: "\t" (tab), "\n" (new line) or "\\" (backslash).

monk · 发表于 2022-7-6 08:23:25

Ah i understand!

But why for example does this not work?

copy

(action_tile "MKLINE" "(command line)(done_dialog)")

MSasu · 发表于 2022-7-6 08:38:11

There are two errors on that excerpt (by the way, please edit your posts to add code tags).

The call of command is not allowed while the dialog is still open.
The name of command must be provided as a string.
copy
```
[s](command line)[/s](command "line")
```

Lee Mac · 发表于 2022-7-6 09:00:16

I've attempted to explain the use of the backslash many times...

http://www.cadtutor.net/forum/showthread.php?66989-Highligting-a-selection&p=459873&viewfull=1#post459873
http://www.cadtutor.net/forum/showthread.php?60935-Help-troubleshooting-LISP-to-insert-titleblock&p=413743&viewfull=1#post413743
http://www.cadtutor.net/forum/showthread.php?59341-Custom-Block-Inserts&p=402387&viewfull=1#post402387
http://www.theswamp.org/index.php?topic=41033.msg462429#msg462429
http://www.theswamp.org/index.php?topic=40111.msg453823#msg453823
http://forums.augi.com/showthread.php?131845-importing-layer-states-via-quot-layerstate-import-quot-function&p=1136714&viewfull=1#post1136714

[编程交流] What does Backslash "\" mean?

发表回复

精选推荐