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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_regex.ref.regex_token_iterator"></a><a class="link" href="regex_token_iterator.html" title="regex_token_iterator"> regex_token_iterator</a> |
| </h3></div></div></div> |
| <p> |
| The template class <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> is an iterator |
| adapter; that is to say it represents a new view of an existing iterator |
| sequence, by enumerating all the occurrences of a regular expression within |
| that sequence, and presenting one or more character sequence for each match |
| found. Each position enumerated by the iterator is a <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a> object that represents |
| what matched a particular sub-expression within the regular expression. When |
| class <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> is used to |
| enumerate a single sub-expression with index -1, then the iterator performs |
| field splitting: that is to say it enumerates one character sequence for |
| each section of the character container sequence that does not match the |
| regular expression specified. |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">BidirectionalIterator</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">charT</span> <span class="special">=</span> <span class="identifier">iterator_traits</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">>::</span><span class="identifier">value_type</span><span class="special">,</span> |
| <span class="keyword">class</span> <span class="identifier">traits</span> <span class="special">=</span> <span class="identifier">regex_traits</span><span class="special"><</span><span class="identifier">charT</span><span class="special">></span> <span class="special">></span> |
| <span class="keyword">class</span> <span class="identifier">regex_token_iterator</span> |
| <span class="special">{</span> |
| <span class="keyword">public</span><span class="special">:</span> |
| <span class="keyword">typedef</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> <span class="identifier">regex_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">sub_match</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">></span> <span class="identifier">value_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">iterator_traits</span><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">>::</span><span class="identifier">difference_type</span> <span class="identifier">difference_type</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <span class="identifier">pointer</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <span class="identifier">reference</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">forward_iterator_tag</span> <span class="identifier">iterator_category</span><span class="special">;</span> |
| |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct1">regex_token_iterator</a><span class="special">();</span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct2">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct3">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatches</span><span class="special">,</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| <span class="keyword">template</span> <span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct4">regex_token_iterator</a><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatches</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.construct5">regex_token_iterator</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&);</span> |
| <span class="identifier">regex_token_iterator</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.assign">operator=</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&);</span> |
| <span class="keyword">bool</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_eq">operator==</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">bool</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_ne">operator!=</a><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_deref">operator*</a><span class="special">()</span><span class="keyword">const</span><span class="special">;</span> |
| <span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_arrow">operator-></a><span class="special">()</span><span class="keyword">const</span><span class="special">;</span> |
| <span class="identifier">regex_token_iterator</span><span class="special">&</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_inc1">operator++</a><span class="special">();</span> |
| <span class="identifier">regex_token_iterator</span> <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.op_inc2">operator++</a><span class="special">(</span><span class="keyword">int</span><span class="special">);</span> |
| <span class="special">};</span> |
| |
| <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">char</span><span class="special">*></span> <span class="identifier">cregex_token_iterator</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">::</span><span class="identifier">const_iterator</span><span class="special">></span> <span class="identifier">sregex_token_iterator</span><span class="special">;</span> |
| <span class="preprocessor">#ifndef</span> <span class="identifier">BOOST_NO_WREGEX</span> |
| <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="keyword">wchar_t</span><span class="special">*></span> <span class="identifier">wcregex_token_iterator</span><span class="special">;</span> |
| <span class="keyword">typedef</span> <span class="identifier">regex_token_iterator</span><span class="special"><<</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span><span class="special">::</span><span class="identifier">const_iterator</span><span class="special">></span> <span class="identifier">wsregex_token_iterator</span><span class="special">;</span> |
| <span class="preprocessor">#endif</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span> |
| <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <a class="link" href="regex_token_iterator.html#boost_regex.regex_token_iterator.make">make_regex_token_iterator</a><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| </pre> |
| <a name="boost_regex.ref.regex_token_iterator.description"></a><h5> |
| <a name="id1008396"></a> |
| <a class="link" href="regex_token_iterator.html#boost_regex.ref.regex_token_iterator.description">Description</a> |
| </h5> |
| <a name="boost_regex.regex_token_iterator.construct1"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">();</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs an end of sequence iterator. |
| </p> |
| <a name="boost_regex.regex_token_iterator.construct2"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist |
| for the lifetime of the iterator constructed from it. |
| </p> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate |
| one string for each regular expression match of the expression <span class="emphasis"><em>re</em></span> |
| found within the sequence [a,b), using match flags <span class="emphasis"><em>m</em></span> |
| (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). |
| The string enumerated is the sub-expression <span class="emphasis"><em>submatch</em></span> |
| for each match found; if <span class="emphasis"><em>submatch</em></span> is -1, then enumerates |
| all the text sequences that did not match the expression <span class="emphasis"><em>re</em></span> |
| (that is to performs field splitting). |
| </p> |
| <p> |
| <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> |
| if the complexity of matching the expression against an N character string |
| begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching |
| the expression (if Boost.Regex is configured in recursive mode), or if the |
| matcher exhausts its permitted memory allocation (if Boost.Regex is configured |
| in non-recursive mode). |
| </p> |
| <a name="boost_regex.regex_token_iterator.construct3"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatches</span><span class="special">,</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="identifier">submatches</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span> |
| <span class="special">&&</span> <span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist |
| for the lifetime of the iterator constructed from it. |
| </p> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate |
| <code class="computeroutput"><span class="identifier">submatches</span><span class="special">.</span><span class="identifier">size</span><span class="special">()</span></code> |
| strings for each regular expression match of the expression <span class="emphasis"><em>re</em></span> |
| found within the sequence [a,b), using match flags <span class="emphasis"><em>m</em></span> |
| (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). |
| For each match found one string will be enumerated for each sub-expression |
| index contained within submatches vector; if <code class="computeroutput"><span class="identifier">submatches</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code> |
| is -1, then the first string enumerated for each match will be all of the |
| text from end of the last match to the start of the current match, in addition |
| there will be one extra string enumerated when no more matches can be found: |
| from the end of the last match found, to the end of the underlying sequence. |
| </p> |
| <p> |
| <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> |
| if the complexity of matching the expression against an N character string |
| begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching |
| the expression (if Boost.Regex is configured in recursive mode), or if the |
| matcher exhausts its permitted memory allocation (if Boost.Regex is configured |
| in non-recursive mode). |
| </p> |
| <a name="boost_regex.regex_token_iterator.construct4"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="identifier">BidirectionalIterator</span> <span class="identifier">a</span><span class="special">,</span> |
| <span class="identifier">BidirectionalIterator</span> <span class="identifier">b</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">regex_type</span><span class="special">&</span> <span class="identifier">re</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatches</span><span class="special">)[</span><span class="identifier">R</span><span class="special">],</span> |
| <span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Preconditions</strong></span>: <code class="computeroutput"><span class="special">!</span><span class="identifier">re</span><span class="special">.</span><span class="identifier">empty</span><span class="special">()</span></code>. Object <span class="emphasis"><em>re</em></span> shall exist |
| for the lifetime of the iterator constructed from it. |
| </p> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that will enumerate |
| <span class="emphasis"><em>R</em></span> strings for each regular expression match of the expression |
| <span class="emphasis"><em>re</em></span> found within the sequence [a,b), using match flags |
| <span class="emphasis"><em>m</em></span> (see <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a>). For each match |
| found one string will be enumerated for each sub-expression index contained |
| within the <span class="emphasis"><em>submatches</em></span> array; if <code class="computeroutput"><span class="identifier">submatches</span><span class="special">[</span><span class="number">0</span><span class="special">]</span></code> |
| is -1, then the first string enumerated for each match will be all of the |
| text from end of the last match to the start of the current match, in addition |
| there will be one extra string enumerated when no more matches can be found: |
| from the end of the last match found, to the end of the underlying sequence. |
| </p> |
| <p> |
| <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> |
| if the complexity of matching the expression against an N character string |
| begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching |
| the expression (if Boost.Regex is configured in recursive mode), or if the |
| matcher exhausts its permitted memory allocation (if Boost.Regex is configured |
| in non-recursive mode). |
| </p> |
| <a name="boost_regex.regex_token_iterator.construct5"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="identifier">that</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs a copy of <code class="computeroutput"><span class="identifier">that</span></code>. |
| </p> |
| <p> |
| <span class="bold"><strong>Postconditions</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.assign"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="identifier">that</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: sets <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> to be equal to <code class="computeroutput"><span class="identifier">that</span></code>. |
| </p> |
| <p> |
| <span class="bold"><strong>Postconditions</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_eq"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">==(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: returns true if <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code> is the same position as <code class="computeroutput"><span class="identifier">that</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_ne"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">!=(</span><span class="keyword">const</span> <span class="identifier">regex_token_iterator</span><span class="special">&)</span><span class="keyword">const</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="special">!(*</span><span class="keyword">this</span> <span class="special">==</span> <span class="identifier">that</span><span class="special">)</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_deref"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">*()</span><span class="keyword">const</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: returns the current character sequence |
| being enumerated. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_arrow"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">const</span> <span class="identifier">value_type</span><span class="special">*</span> <span class="keyword">operator</span><span class="special">->()</span><span class="keyword">const</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: returns <code class="computeroutput"><span class="special">&(*</span><span class="keyword">this</span><span class="special">)</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_inc1"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">++();</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: Moves on to the next character |
| sequence to be enumerated. |
| </p> |
| <p> |
| <span class="bold"><strong>Throws</strong></span>: <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">runtime_error</span></code> |
| if the complexity of matching the expression against an N character string |
| begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching |
| the expression (if Boost.Regex is configured in recursive mode), or if the |
| matcher exhausts its permitted memory allocation (if Boost.Regex is configured |
| in non-recursive mode). |
| </p> |
| <p> |
| <span class="bold"><strong>Returns</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>. |
| </p> |
| <a name="boost_regex.regex_token_iterator.op_inc2"></a><p> |
| </p> |
| <pre class="programlisting"><span class="identifier">regex_token_iterator</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">++(</span><span class="keyword">int</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: constructs a copy result of <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>, then |
| calls <code class="computeroutput"><span class="special">++(*</span><span class="keyword">this</span><span class="special">)</span></code>. |
| </p> |
| <p> |
| <span class="bold"><strong>Returns</strong></span>: result. |
| </p> |
| <a name="boost_regex.regex_token_iterator.make"></a><p> |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">int</span> <span class="identifier">submatch</span> <span class="special">=</span> <span class="number">0</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">N</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span> |
| <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="special">(&</span><span class="identifier">submatch</span><span class="special">)[</span><span class="identifier">N</span><span class="special">],</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">charT</span><span class="special">*</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| |
| <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">charT</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ST</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">SA</span><span class="special">></span> |
| <span class="identifier">regex_token_iterator</span><span class="special"><</span> |
| <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>::</span><span class="identifier">const_iterator</span><span class="special">,</span> <span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">></span> |
| <span class="identifier">make_regex_token_iterator</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">ST</span><span class="special">,</span> <span class="identifier">SA</span><span class="special">>&</span> <span class="identifier">p</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">basic_regex</span><span class="special"><</span><span class="identifier">charT</span><span class="special">,</span> <span class="identifier">traits</span><span class="special">>&</span> <span class="identifier">e</span><span class="special">,</span> |
| <span class="keyword">const</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">>&</span> <span class="identifier">submatch</span><span class="special">,</span> |
| <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_flag_type</span> <span class="identifier">m</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">);</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Effects</strong></span>: returns a <a class="link" href="regex_token_iterator.html" title="regex_token_iterator"><code class="computeroutput"><span class="identifier">regex_token_iterator</span></code></a> that enumerates |
| one <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a> |
| for each value in <span class="emphasis"><em>submatch</em></span> for each occurrence of regular |
| expression <span class="emphasis"><em>e</em></span> in string <span class="emphasis"><em>p</em></span>, matched |
| using <a class="link" href="match_flag_type.html" title="match_flag_type"><code class="computeroutput"><span class="identifier">match_flag_type</span></code></a> |
| <span class="emphasis"><em>m</em></span>. |
| </p> |
| <a name="boost_regex.ref.regex_token_iterator.examples"></a><h5> |
| <a name="id1011659"></a> |
| <a class="link" href="regex_token_iterator.html#boost_regex.ref.regex_token_iterator.examples">Examples</a> |
| </h5> |
| <p> |
| The following example takes a string and splits it into a series of tokens: |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">regex</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">argc</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">string</span> <span class="identifier">s</span><span class="special">;</span> |
| <span class="keyword">do</span><span class="special">{</span> |
| <span class="keyword">if</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Enter text to split (or \"quit\" to exit): "</span><span class="special">;</span> |
| <span class="identifier">getline</span><span class="special">(</span><span class="identifier">cin</span><span class="special">,</span> <span class="identifier">s</span><span class="special">);</span> |
| <span class="keyword">if</span><span class="special">(</span><span class="identifier">s</span> <span class="special">==</span> <span class="string">"quit"</span><span class="special">)</span> <span class="keyword">break</span><span class="special">;</span> |
| <span class="special">}</span> |
| <span class="keyword">else</span> |
| <span class="identifier">s</span> <span class="special">=</span> <span class="string">"This is a string of tokens"</span><span class="special">;</span> |
| |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">re</span><span class="special">(</span><span class="string">"\\s+"</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">re</span><span class="special">,</span> <span class="special">-</span><span class="number">1</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> |
| |
| <span class="keyword">unsigned</span> <span class="identifier">count</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> |
| <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> |
| <span class="identifier">count</span><span class="special">++;</span> |
| <span class="special">}</span> |
| <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"There were "</span> <span class="special"><<</span> <span class="identifier">count</span> <span class="special"><<</span> <span class="string">" tokens found."</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> |
| |
| <span class="special">}</span><span class="keyword">while</span><span class="special">(</span><span class="identifier">argc</span> <span class="special">==</span> <span class="number">1</span><span class="special">);</span> |
| <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> |
| <span class="special">}</span> |
| </pre> |
| <p> |
| The following example takes a html file and outputs a list of all the linked |
| files: |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">fstream</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iterator</span><span class="special">></span> |
| <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">regex</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">e</span><span class="special">(</span><span class="string">"<\\s*A\\s+[^>]*href\\s*=\\s*\"([^\"]*)\""</span><span class="special">,</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span><span class="special">::</span><span class="identifier">normal</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regbase</span><span class="special">::</span><span class="identifier">icase</span><span class="special">);</span> |
| |
| <span class="keyword">void</span> <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">&</span> <span class="identifier">s</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&</span> <span class="identifier">is</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> |
| <span class="comment">// |
| </span> <span class="comment">// attempt to grow string buffer to match file size, |
| </span> <span class="comment">// this doesn't always work... |
| </span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">reserve</span><span class="special">(</span><span class="identifier">is</span><span class="special">.</span><span class="identifier">rdbuf</span><span class="special">()-></span><span class="identifier">in_avail</span><span class="special">());</span> |
| <span class="keyword">char</span> <span class="identifier">c</span><span class="special">;</span> |
| <span class="keyword">while</span><span class="special">(</span><span class="identifier">is</span><span class="special">.</span><span class="identifier">get</span><span class="special">(</span><span class="identifier">c</span><span class="special">))</span> |
| <span class="special">{</span> |
| <span class="comment">// use logarithmic growth stategy, in case |
| </span> <span class="comment">// in_avail (above) returned zero: |
| </span> <span class="keyword">if</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">capacity</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">size</span><span class="special">())</span> |
| <span class="identifier">s</span><span class="special">.</span><span class="identifier">reserve</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">capacity</span><span class="special">()</span> <span class="special">*</span> <span class="number">3</span><span class="special">);</span> |
| <span class="identifier">s</span><span class="special">.</span><span class="identifier">append</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="identifier">c</span><span class="special">);</span> |
| <span class="special">}</span> |
| <span class="special">}</span> |
| |
| <span class="keyword">int</span> <span class="identifier">main</span><span class="special">(</span><span class="keyword">int</span> <span class="identifier">argc</span><span class="special">,</span> <span class="keyword">char</span><span class="special">**</span> <span class="identifier">argv</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">s</span><span class="special">;</span> |
| <span class="keyword">int</span> <span class="identifier">i</span><span class="special">;</span> |
| <span class="keyword">for</span><span class="special">(</span><span class="identifier">i</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="identifier">argc</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Findings URL's in "</span> <span class="special"><<</span> <span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]</span> <span class="special"><<</span> <span class="string">":"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">is</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span> |
| <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">is</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">e</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> |
| <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| <span class="special">}</span> |
| <span class="special">}</span> |
| <span class="comment">// |
| </span> <span class="comment">// alternative method: |
| </span> <span class="comment">// test the array-literal constructor, and split out the whole |
| </span> <span class="comment">// match as well as $1.... |
| </span> <span class="comment">// |
| </span> <span class="keyword">for</span><span class="special">(</span><span class="identifier">i</span> <span class="special">=</span> <span class="number">1</span><span class="special">;</span> <span class="identifier">i</span> <span class="special"><</span> <span class="identifier">argc</span><span class="special">;</span> <span class="special">++</span><span class="identifier">i</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Findings URL's in "</span> <span class="special"><<</span> <span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]</span> <span class="special"><<</span> <span class="string">":"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">is</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span> |
| <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">is</span><span class="special">);</span> |
| <span class="keyword">const</span> <span class="keyword">int</span> <span class="identifier">subs</span><span class="special">[]</span> <span class="special">=</span> <span class="special">{</span><span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,};</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">i</span><span class="special">(</span><span class="identifier">s</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">s</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> <span class="identifier">e</span><span class="special">,</span> <span class="identifier">subs</span><span class="special">);</span> |
| <span class="identifier">boost</span><span class="special">::</span><span class="identifier">sregex_token_iterator</span> <span class="identifier">j</span><span class="special">;</span> |
| <span class="keyword">while</span><span class="special">(</span><span class="identifier">i</span> <span class="special">!=</span> <span class="identifier">j</span><span class="special">)</span> |
| <span class="special">{</span> |
| <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="special">*</span><span class="identifier">i</span><span class="special">++</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> |
| <span class="special">}</span> |
| <span class="special">}</span> |
| |
| <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> |
| <span class="special">}</span> |
| </pre> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 1998 -2010 John Maddock<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
| </p> |
| </div></td> |
| </tr></table> |
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