On Sun, Feb 9, 2014 at 12:15 PM, Renato Lenzi <[email protected]> wrote:
>
>
> Always talking about read & write i noticed another interesting thing:
>
> use std::io::buffered::BufferedReader;
> use std::io::stdin;
>
> fn main()
> {
> print!("Insert your name: ");
> let mut stdin = BufferedReader::new(stdin());
> let s1 = stdin.read_line().unwrap_or(~"nothing");
> print!("Welcome, {}", s1);
> }
>
> when i run this simple code the output "Insert your name" doesn't appear
> on the screen... only after typing and entering a string the whole output
> jumps out... am i missing some "flush" (ala Fantom) or similar? I am using
> Rust 0.9 on W7.
>
Ah, that's interesting. In most languages whenever you ask for user input
(read on stdin) it automatically triggers a flush on stdout and stderr to
avoid this uncomfortable situation.
I suppose it would not be took difficult to incorporate this in Rust.
-- Matthieu.
>
>
> On Sun, Feb 9, 2014 at 2:40 AM, Patrick Walton <[email protected]>wrote:
>
>> On 2/8/14 3:35 PM, Alex Crichton wrote:
>>
>>> We do indeed want to make common tasks like this fairly lightweight,
>>> but we also strive to require that the program handle possible error
>>> cases. Currently, the code you have shows well what one would expect
>>> when reading a line of input. On today's master, you might be able to
>>> shorten it slightly to:
>>>
>>> use std::io::{stdin, BufferedReader};
>>>
>>> fn main() {
>>> let mut stdin = BufferedReader::new(stdin());
>>> for line in stdin.lines() {
>>> println!("{}", line);
>>> }
>>> }
>>>
>>> I'm curious thought what you think is the heavy/verbose aspects of
>>> this? I like common patterns having shortcuts here and there!
>>>
>>
>> Is there any way we can get rid of the need to create a buffered reader?
>> It feels too enterprisey.
>>
>> Patrick
>>
>>
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>>
>
>
>
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