• Mark Isaacson (17/17) May 05 2014 I'm trying my hand at reading from standard input and having
• bearophile (11/15) May 06 2014 There isn't always a 1:1 mapping between C++ and D. In D if you
• Mark Isaacson (6/6) May 06 2014 Fair enough. I've done stuff like that in the past. I'm trying to
• bearophile (5/10) May 06 2014 If you need/want to use the C++ style, even if it's not fully
• Mark Isaacson (6/6) May 06 2014 Indeed. However, doing so looks more painful than redefining my
• bearophile (5/11) May 06 2014 OK. Once you are done with this little project you can post a
• Mark Isaacson (2/2) May 06 2014 An exceptionally generous offer! May take you up on that. Thank

"Mark Isaacson" <turck11 hotmail.com> writes:

I'm trying my hand at reading from standard input and having 
little luck. In particular, I would like to be able to do the 
rough equivalent of C++'s:

cin >> myString;

As opposed to reading the whole line.

I attempted to do this with readf:

string result;
readf(" %s ", &result);

However this does not seem to do the trick. If I enter "Hello\n" 
on the terminal, it keeps waiting for input. By contrast, if I 
enter "Hello program", it correctly identifies "Hello" as the 
'result'.

Thus, contrary to what I've been reading, the trailing space 
seems to only account for space characters, not general 
whitespace.

I presume that I'm missing something obvious, any ideas?


Thanks in advance!

"bearophile" <bearophileHUGS lycos.com> writes:

Mark Isaacson:

 I'm trying my hand at reading from standard input and having 
 little luck. In particular, I would like to be able to do the 
 rough equivalent of C++'s:

 cin >> myString;

There isn't always a 1:1 mapping between C++ and D. In D if you 
want a single word you usually read the whole line (with a 
byLine) and then you use split or splitter to take the single 
words.

Something like this (untested):

foreach (line; stdin.byLine) {
     immutable words = line.chomp.idup.split;
}

Bye,
bearophile

"Mark Isaacson" <turck11 hotmail.com> writes:

Fair enough. I've done stuff like that in the past. I'm trying to 
implement a university project that was originally designed for 
C++ style I/O... and so where I'd have otherwise jumped at 
something like that from the beginning, my hands are slightly 
tied.

Suppose I'll make due/not fully comply with the spec.

"bearophile" <bearophileHUGS lycos.com> writes:

Mark Isaacson:

 Fair enough. I've done stuff like that in the past. I'm trying 
 to implement a university project that was originally designed 
 for C++ style I/O... and so where I'd have otherwise jumped at 
 something like that from the beginning, my hands are slightly 
 tied.

If you need/want to use the C++ style, even if it's not fully 
Phobos-idiomatic, probably you can invent some way to simulate it.

Bye,
bearophile

"Mark Isaacson" <turck11 hotmail.com> writes:

Indeed. However, doing so looks more painful than redefining my 
goals. Upon further examination it seems that I had more 
flexibility than I originally estimated. Besides, the real reason 
I'm implementing this project is just to practice for when I get 
to write production D code in a week anyway; I'd rather learn the 
idioms.

"bearophile" <bearophileHUGS lycos.com> writes:

Mark Isaacson:

 Indeed. However, doing so looks more painful than redefining my 
 goals. Upon further examination it seems that I had more 
 flexibility than I originally estimated. Besides, the real 
 reason I'm implementing this project is just to practice for 
 when I get to write production D code in a week anyway; I'd 
 rather learn the idioms.

OK. Once you are done with this little project you can post a 
link here, I can review the code a little if you want.

Bye,
bearophile

"Mark Isaacson" <turck11 hotmail.com> writes:

An exceptionally generous offer! May take you up on that. Thank 
you :).