• "Bill Lear" <rael see.sig.com> Jan 22 2007
• "Jarrett Billingsley" <kb3ctd2 yahoo.com> Jan 22 2007
• "Bill Lear" <rael see.sig.com> Jan 23 2007
• "Jarrett Billingsley" <kb3ctd2 yahoo.com> Jan 23 2007
• Thomas Kuehne <thomas-dloop kuehne.cn> Jan 24 2007

"Bill Lear" <rael see.sig.com> writes:

I am trying to read lines from stdin and echo them to stdout.

I have come up with this:

import std.stdio;
import std.cstream;
import std.string;

void main () {
    while (!din.eof()) {
        char[] line = din.readLine();
        if (line == null) continue;
        writefln("%s", line);
    }
}

but am confused why I would need to check for null.  Is there
a better way to do this?


Bill
-- 
r * e *   * o * y * a * c * m
* a * l * z * p * r * . * o *

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"Bill Lear" <rael see.sig.com> wrote in message 
news:m33b621rvp.fsf pppp.zopyra.com...
I am trying to read lines from stdin and echo them to stdout.

 I have come up with this:

 import std.stdio;
 import std.cstream;
 import std.string;

 void main () {
    while (!din.eof()) {
        char[] line = din.readLine();
        if (line == null) continue;
        writefln("%s", line);
    }
 }

 but am confused why I would need to check for null.  Is there
 a better way to do this?


Do you?  I took out the null check and it works fine, unless you're getting 
errors on Linux or something. 

"Bill Lear" <rael see.sig.com> writes:

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
 "Bill Lear" <rael see.sig.com> wrote in message 
 news:m33b621rvp.fsf pppp.zopyra.com...
I am trying to read lines from stdin and echo them to stdout.

 I have come up with this:

 import std.stdio;
 import std.cstream;
 import std.string;

 void main () {
    while (!din.eof()) {
        char[] line = din.readLine();
        if (line == null) continue;
        writefln("%s", line);
    }
 }

 but am confused why I would need to check for null.  Is there
 a better way to do this?


 Do you?  I took out the null check and it works fine, unless you're getting 
 errors on Linux or something. 


Yes, this is under Linux, dmd version 1.00.  If I run the program,
with the text of the program as input, without the null check, it
prints out an additional blank line for every line in the file.


Bill
-- 
r a e l  
z o p y r a .
c o m

"Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:

"Bill Lear" <rael see.sig.com> wrote in message 
news:m3hcuhzkpe.fsf lisa.zopyra.com...

 Yes, this is under Linux, dmd version 1.00.  If I run the program,
 with the text of the program as input, without the null check, it
 prints out an additional blank line for every line in the file.


Hmm, that doesn't happen under Windows.  I guess it's a platform-specific 
issue.  Might want to post it in Bugzilla (I can't find any issues about it 
there already). 

Thomas Kuehne <thomas-dloop kuehne.cn> writes:

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Hash: SHA1

Jarrett Billingsley schrieb am 2007-01-24:
 "Bill Lear" <rael see.sig.com> wrote in message 
 news:m3hcuhzkpe.fsf lisa.zopyra.com...

 Yes, this is under Linux, dmd version 1.00.  If I run the program,
 with the text of the program as input, without the null check, it
 prints out an additional blank line for every line in the file.


 Hmm, that doesn't happen under Windows.  I guess it's a platform-specific 
 issue.  Might want to post it in Bugzilla (I can't find any issues about it 
 there already). 


http://d.puremagic.com/issues/show_bug.cgi?id=881

Thomas


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