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It looks like many of these tests are already disabled on emscripten,
which also doesn't seem to support environment variables and subprocess
spawning. Just add a similar tag for CloudABI. While there, sort some of
the lists of operating systems alphabetically.
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All tests should now have annotation for *why* they're ignored on emscripten. A
few tests no longer need such an annotation as well!
Closes #41299
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Most of these rely on spawning processes, which is not possible in
Emscripten.
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The number of arguments given to a process is always known, which
makes implementing DoubleEndedIterator possible.
That way, the Iterator::rev() method becomes usable, among others.
Signed-off-by: Sebastian Thiel <byronimo@gmail.com>
Tidy for DoubleEndedIterator
I chose to not create a new feature for it, even though
technically, this makes me lie about the original availability
of the implementation.
Verify with @alexchrichton
Setup feature flag for new std::env::Args iterators
Add test for Args reverse iterator
It's somewhat depending on the input of the test program,
but made in such a way that should be somewhat flexible to changes
to the way it is called.
Deduplicate windows ArgsOS code for DEI
DEI = DoubleEndedIterator
Move env::args().rev() test to run-pass
It must be controlling it's arguments for full isolation.
Remove superfluous feature name
Assert all arguments returned by env::args().rev()
Let's be very sure it works as we expect, why take chances.
Fix rval of os_string_from_ptr
A trait cannot be returned, but only the corresponding object.
Deref pointers to actually operate on the argument
Put unsafe to correct location
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