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buildin: add flush_stdout() func #754

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commented Jun 28, 2019

in default, print string to stdout has buffer, short message printed to stdout cannot display immediately, add flush_stdout() function resolve this problem

sample code:

import time

fn main() {
        print('hello ')
        time.sleep(time.Time{ sec: 2 })

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commented Jun 29, 2019

IMHO print must has autoflush like in other languages.


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commented Jun 30, 2019

But there might be performance issues if we flush too often. We can have separate functions for the purpose. Something like:

  1. flush_print - for flushing after printing
  2. print - buffered printing

println by default will always flush stdout after getting a \n so we don't need to care about it.

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