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<title>Issue 2053: Errors in regex bitmask types</title>
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<p><em>This page is a snapshot from the LWG issues list, see the <a href="lwg-active.html">Library Active Issues List</a> for more information and the meaning of <a href="lwg-active.html#C++14">C++14</a> status.</em></p>
<h3 id="2053"><a href="lwg-defects.html#2053">2053</a>. Errors in <code>regex</code> bitmask types</h3>
<p><b>Section:</b> 28.6.4 <a href="https://wg21.link/re.const">[re.const]</a> <b>Status:</b> <a href="lwg-active.html#C++14">C++14</a>
 <b>Submitter:</b> Jonathan Wakely <b>Opened:</b> 2011-05-09 <b>Last modified:</b> 2016-01-28</p>
<p><b>Priority: </b>Not Prioritized
</p>
<p><b>View all other</b> <a href="lwg-index.html#re.const">issues</a> in [re.const].</p>
<p><b>View all issues with</b> <a href="lwg-status.html#C++14">C++14</a> status.</p>
<p><b>Discussion:</b></p>
<p>
When <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3110.html">N3110</a> 
was applied to the WP some redundant "static" keywords were added and one form of initializer 
which isn't valid for enumeration types was replaced with another form of invalid initializer.
</p>

<p><i>[
2011 Bloomington.
]</i></p>


<p>
Move to Ready.
</p>



<p id="res-2053"><b>Proposed resolution:</b></p>
<p>This wording is relative to the FDIS.</p>
<ol>
<li><p>Change 28.6.4.2 <a href="https://wg21.link/re.synopt">[re.synopt]</a> as indicated:</p>
<blockquote><pre>
namespace std {
  namespace regex_constants {
    typedef <i>T1</i> syntax_option_type;
    <del>static </del>constexpr syntax_option_type icase = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type nosubs = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type optimize = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type collate = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type ECMAScript = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type basic = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type extended = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type awk = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type grep = <i>unspecified</i> ;
    <del>static </del>constexpr syntax_option_type egrep = <i>unspecified</i> ;
  }
}
</pre></blockquote>
</li>

<li><p>Change 28.6.4.3 <a href="https://wg21.link/re.matchflag">[re.matchflag]</a> as indicated:</p>
<blockquote><pre>
namespace std {
  namespace regex_constants {
    typedef <i>T2</i> match_flag_type;
    <del>static </del>constexpr match_flag_type match_default<del> = 0</del><ins>{};</ins>
    <del>static </del>constexpr match_flag_type match_not_bol = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_not_eol = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_not_bow = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_not_eow = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_any = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_not_null = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_continuous = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type match_prev_avail = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type format_default<del> = 0</del><ins>{}</ins>;
    <del>static </del>constexpr match_flag_type format_sed = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type format_no_copy = <i>unspecified</i> ;
    <del>static </del>constexpr match_flag_type format_first_only = <i>unspecified</i> ;
  }
}
</pre></blockquote>
</li>

<li><p>Change 28.6.4.4 <a href="https://wg21.link/re.err">[re.err]</a> as indicated:</p>
<blockquote><pre>
namespace std {
  namespace regex_constants {
    typedef <i>T3</i> error_type;
    <del>static </del>constexpr error_type error_collate = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_ctype = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_escape = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_backref = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_brack = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_paren = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_brace = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_badbrace = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_range = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_space = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_badrepeat = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_complexity = <i>unspecified</i> ;
    <del>static </del>constexpr error_type error_stack = <i>unspecified</i> ;
  }
}
</pre></blockquote>
</li>
</ol>





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