std::num_put can generate output that is not parseable by std::num_get facet
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Key: STDCXX-535
URL: https://issues.apache.org/jira/browse/STDCXX-535
Project: C++ Standard Library
Issue Type: Bug
Components: 22. Localization
Affects Versions: 4.1.4, 4.1.3, 4.1.2
Reporter: Travis Vitek
std::num_get<>::get_date() is required to be able to parse the output produced
by std::num_put<>::put(..., 'x'). For some locales, the '%x' format specifier
expands out to '%e.%m.%Y'. When a date is formatted using this, there will be a
leading space, and that leading space causes the num_get<>::get_date()
operation to fail.
The root of the problem is that the POSIX strftime() function requires that the
'%e' specifier generate whitespace for single digit monthdays, and the POSIX
strptime() function says that the number may be padded on the left with 0s. It
does not appear to specify that whitespace is allowed. The strptime()
implementation on some platforms [sun, linux, compaq, aix] allow this
whitespace, while others [hp, freebsd] do not.
Discussion here.
[http://mail-archives.apache.org/mod_mbox/incubator-stdcxx-dev/200708.mbox/[EMAIL
PROTECTED]
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