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### 175. Ambiguity for `basic_streambuf::pubseekpos()` and a few other functions.

Section: 99 [depr.ios.members] Status: TC1 Submitter: Dietmar Kühl Opened: 1999-07-23 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

According to paragraph 8 of this section, the methods `basic_streambuf::pubseekpos()`, `basic_ifstream::open()`, and `basic_ofstream::open` "may" be overloaded by a version of this function taking the type `ios_base::open_mode` as last argument argument instead of `ios_base::openmode` (`ios_base::open_mode` is defined in this section to be an alias for one of the integral types). The clause specifies, that the last argument has a default argument in three cases. However, this generates an ambiguity with the overloaded version because now the arguments are absolutely identical if the last argument is not specified.

Proposed resolution:

In 99 [depr.ios.members] paragraph 8, remove the default arguments for `basic_streambuf::pubseekpos()`, `basic_ifstream::open()`, and `basic_ofstream::open().`