[9fans] rcmain

[9fans] rcmain

[erik quanstrom]

rcmain has an interesting construct. it goes something like

	if (~ $#'fn#cd' 1)
		cmd;

i was a little curious about this so i tried this

	fn fu {echo bar}
	if (~ $#'fn#fu' 1)
		echo yes;
	if not
		echo no;

which outputs "no". however this 

	fn fu {echo bar}
	rc
	if (~ $#'fn#fu' 1)
		echo yes;
	if not
		echo no;

outputs "yes". 

Re: [9fans] rcmain

[Russ Cox]

> rcmain has an interesting construct. it goes something like

What rcmain are you looking at?  I can't find $#'fn#cd' anywhere.

While we're on the topic of surprising constructs, I discovered
this about troff earlier today:

.ds A0 "This is string A0
.ds A1 "This is string A1
.ds A2 "This is string A2
.de A
.tm Look: \\*(A\\$1
..
.A 1

Russ

Re: [9fans] rcmain

[erik quanstrom]

oh boy, that's from an /old/ p9p. i think it's an rcmain that came with the p9p
awhile ago, but i may have written it. i don't remember writing something
like that, but hey, i can't remember what i did last week. 

- erik

Russ Cox <rsc@swtch.com> writes

| 
| > rcmain has an interesting construct. it goes something like
| 
| What rcmain are you looking at?  I can't find $#'fn#cd' anywhere.