* How to hook "std::cin"?
@ 2020-10-29 2:34 孙世龙 sunshilong
2020-10-29 9:03 ` Jonathan Wakely
0 siblings, 1 reply; 2+ messages in thread
From: 孙世龙 sunshilong @ 2020-10-29 2:34 UTC (permalink / raw)
To: libstdc++
Hi, list
I want "std::cin >> str" to behave as follows on Linux:
1. sleep for a second;
2.return a specific string, e.g: "hello, world".
How to achieve this goal?
I would be grateful to have some help with this question.
Best Regards
Sunshilong
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to hook "std::cin"?
2020-10-29 2:34 How to hook "std::cin"? 孙世龙 sunshilong
@ 2020-10-29 9:03 ` Jonathan Wakely
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Wakely @ 2020-10-29 9:03 UTC (permalink / raw)
To: 孙世龙 sunshilong; +Cc: libstdc++
On 29/10/20 10:34 +0800, 孙世龙 sunshilong via Libstdc++ wrote:
>Hi, list
>
>I want "std::cin >> str" to behave as follows on Linux:
>1. sleep for a second;
>2.return a specific string, e.g: "hello, world".
>
>How to achieve this goal?
You can write a custom streambuf that sleeps in its underflow()
member, then fills the get area with that specific string.
Then replace std::cin's stream buffer with your custom one.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-10-29 9:03 ` Jonathan Wakely
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