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in_avail() error. Major compliance problem
- To: gcc at gcc dot gnu dot org
- Subject: in_avail() error. Major compliance problem
- From: David Rasmussen <pinkfloydhomer at yahoo dot com>
- Date: Fri, 26 Oct 2001 00:00:32 +0200
There is a problem with in_avail() in libstdc++ 3. I think it is a huge
problem as lots and lots of existing, compliant code wont work as expected,
and I suspect an easy fix, although I haven't checked myself. Example:
#include <iostream> int main()
std::cout << std::cin.rdbuf()->in_avail() << std::endl;
This simple code should write a 0 and exit immediately. This is what happens
with gcc 2.95.3 and the library that comes with that. With gcc 3.0.2, it is
hanging blockingly until enter is pressed, and then writes a 1. Code that
checks the buffer in this way does not expect execution to blocked by input.
It expects and answer immediately. This is a huge problem, and I can't
imagine that it hasn't been solved?