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From "Travis Vitek (JIRA)" <j...@apache.org>
Subject [jira] Updated: (STDCXX-535) std::time_put can generate output that is not parseable by std::time_get facet
Date Thu, 06 Sep 2007 19:28:31 GMT

     [ https://issues.apache.org/jira/browse/STDCXX-535?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Travis Vitek updated STDCXX-535:
--------------------------------

    Description: 
std::time_get<>::get_date() is required to be able to parse the output produced by std::time_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 time_get<>::get_date()
operation to fail.

The root of the problem is that the POSIX strftime() function [which we emulate in time_get]
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/%3c46CC8D6C.9000007@roguewave.com%3e]

  was:
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/%3c46CC8D6C.9000007@roguewave.com%3e]

        Summary: std::time_put can generate output that is not parseable by std::time_get
facet  (was: std::num_put can generate output that is not parseable by std::num_get facet)

Corrected locale facet name to time_get.

> std::time_put can generate output that is not parseable by std::time_get facet
> ------------------------------------------------------------------------------
>
>                 Key: STDCXX-535
>                 URL: https://issues.apache.org/jira/browse/STDCXX-535
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: 22. Localization
>    Affects Versions: 4.1.2, 4.1.3, 4.1.4
>            Reporter: Travis Vitek
>
> std::time_get<>::get_date() is required to be able to parse the output produced
by std::time_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 time_get<>::get_date() operation to fail.
> The root of the problem is that the POSIX strftime() function [which we emulate in time_get]
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/%3c46CC8D6C.9000007@roguewave.com%3e]

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