1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>regex_replace</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Boost.Regex 5.1.4"> 8<link rel="up" href="../ref.html" title="Reference"> 9<link rel="prev" href="regex_search.html" title="regex_search"> 10<link rel="next" href="regex_iterator.html" title="regex_iterator"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="regex_search.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="regex_iterator.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="boost_regex.ref.regex_replace"></a><a class="link" href="regex_replace.html" title="regex_replace">regex_replace</a> 28</h3></div></div></div> 29<pre class="programlisting"><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> 30</pre> 31<p> 32 The algorithm <a class="link" href="regex_replace.html" title="regex_replace"><code class="computeroutput"><span class="identifier">regex_replace</span></code></a> searches through a 33 string finding all the matches to the regular expression: for each match 34 it then calls <a class="link" href="match_results.html#boost_regex.match_results_format"><code class="computeroutput"><span class="identifier">match_results</span><span class="special"><>::</span><span class="identifier">format</span></code></a> to format the string and 35 sends the result to the output iterator. Sections of text that do not match 36 are copied to the output unchanged only if the <span class="emphasis"><em>flags</em></span> 37 parameter does not have the flag <code class="computeroutput"><span class="identifier">format_no_copy</span></code> 38 set. If the flag <code class="computeroutput"><span class="identifier">format_first_only</span></code> 39 is set then only the first occurrence is replaced rather than all occurrences. 40 </p> 41<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">OutputIterator</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">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Formatter</span><span class="special">></span> 42<span class="identifier">OutputIterator</span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">OutputIterator</span> <span class="identifier">out</span><span class="special">,</span> 43 <span class="identifier">BidirectionalIterator</span> <span class="identifier">first</span><span class="special">,</span> 44 <span class="identifier">BidirectionalIterator</span> <span class="identifier">last</span><span class="special">,</span> 45 <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> 46 <span class="identifier">Formatter</span> <span class="identifier">fmt</span><span class="special">,</span> 47 <span class="identifier">match_flag_type</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> 48 49<span class="keyword">template</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">Formatter</span><span class="special">></span> 50<span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">></span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">>&</span> <span class="identifier">s</span><span class="special">,</span> 51 <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> 52 <span class="identifier">Formatter</span> <span class="identifier">fmt</span><span class="special">,</span> 53 <span class="identifier">match_flag_type</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> 54</pre> 55<h5> 56<a name="boost_regex.ref.regex_replace.h0"></a> 57 <span class="phrase"><a name="boost_regex.ref.regex_replace.description"></a></span><a class="link" href="regex_replace.html#boost_regex.ref.regex_replace.description">Description</a> 58 </h5> 59<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">OutputIterator</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">traits</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Formatter</span><span class="special">></span> 60<span class="identifier">OutputIterator</span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">OutputIterator</span> <span class="identifier">out</span><span class="special">,</span> 61 <span class="identifier">BidirectionalIterator</span> <span class="identifier">first</span><span class="special">,</span> 62 <span class="identifier">BidirectionalIterator</span> <span class="identifier">last</span><span class="special">,</span> 63 <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> 64 <span class="identifier">Formatter</span> <span class="identifier">fmt</span><span class="special">,</span> 65 <span class="identifier">match_flag_type</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> 66</pre> 67<p> 68 Enumerates all the occurrences of expression <span class="emphasis"><em>e</em></span> in the 69 sequence [first, last), replacing each occurrence with the string that results 70 by merging the match found with the format string <span class="emphasis"><em>fmt</em></span>, 71 and copies the resulting string to <span class="emphasis"><em>out</em></span>. In the case 72 that <span class="emphasis"><em>fmt</em></span> is a unary, binary or ternary function object, 73 then the character sequence generated by that object is copied unchanged 74 to the output when performing a substitution. 75 </p> 76<p> 77 If the flag <code class="computeroutput"><span class="identifier">format_no_copy</span></code> 78 is set in <span class="emphasis"><em>flags</em></span> then unmatched sections of text are 79 not copied to output. 80 </p> 81<p> 82 If the flag <code class="computeroutput"><span class="identifier">format_first_only</span></code> 83 is set in flags then only the first occurrence of <span class="emphasis"><em>e</em></span> 84 is replaced. 85 </p> 86<p> 87 The manner in which the format string <span class="emphasis"><em>fmt</em></span> is interpreted, 88 along with the rules used for finding matches, are determined by the flags 89 set in <span class="emphasis"><em>flags</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>. 90 </p> 91<p> 92 <span class="bold"><strong>Requires</strong></span> The type <code class="computeroutput"><span class="identifier">Formatter</span></code> 93 must be either a pointer to a null-terminated string of type <code class="computeroutput"><span class="identifier">char_type</span><span class="special">[]</span></code>, 94 or be a container of <code class="computeroutput"><span class="identifier">char_type</span></code>'s 95 (for example <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">char_type</span><span class="special">></span></code>) 96 or be a unary, binary or ternary functor that computes the replacement string 97 from a function call: either <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">)</span></code> 98 which must return a container of <code class="computeroutput"><span class="identifier">char_type</span></code>'s 99 to be used as the replacement text, or either <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">,</span> 100 <span class="identifier">out</span><span class="special">)</span></code> 101 or <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">,</span> <span class="identifier">out</span><span class="special">,</span> <span class="identifier">flags</span><span class="special">)</span></code>, both of which write the replacement text 102 to <code class="computeroutput"><span class="special">*</span><span class="identifier">out</span></code>, 103 and then return the new OutputIterator position. In each case <code class="computeroutput"><span class="identifier">what</span></code> is the <a class="link" href="match_results.html" title="match_results"><code class="computeroutput"><span class="identifier">match_results</span></code></a> object that represents 104 the match found. Note that if the formatter is a functor, then it is <span class="emphasis"><em>passed 105 by value</em></span>: users that want to pass function objects with internal 106 state might want to use <a href="../../../../../../doc/html/ref.html" target="_top">Boost.Ref</a> 107 to wrap the object so that it's passed by reference. 108 </p> 109<p> 110 <span class="bold"><strong>Effects</strong></span>: Constructs an <a class="link" href="regex_iterator.html" title="regex_iterator"><code class="computeroutput"><span class="identifier">regex_iterator</span></code></a> object: 111 </p> 112<pre class="programlisting"><span class="identifier">regex_iterator</span><span class="special"><</span><span class="identifier">BidirectionalIterator</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">Allocator</span><span class="special">></span> 113 <span class="identifier">i</span><span class="special">(</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">last</span><span class="special">,</span> <span class="identifier">e</span><span class="special">,</span> <span class="identifier">flags</span><span class="special">),</span> 114</pre> 115<p> 116 and uses <span class="emphasis"><em>i</em></span> to enumerate through all of the matches 117 <span class="emphasis"><em>m</em></span> of type <a class="link" href="match_results.html" title="match_results"><code class="computeroutput"><span class="identifier">match_results</span></code></a> <code class="computeroutput"><span class="special"><</span><span class="identifier">BidirectionalIterator</span><span class="special">></span></code> 118 that occur within the sequence [first, last). 119 </p> 120<p> 121 If no such matches are found and 122 </p> 123<pre class="programlisting"><span class="special">!(</span><span class="identifier">flags</span> <span class="special">&</span> <span class="identifier">format_no_copy</span><span class="special">)</span> 124</pre> 125<p> 126 then calls 127 </p> 128<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">copy</span><span class="special">(</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">last</span><span class="special">,</span> <span class="identifier">out</span><span class="special">).</span> 129</pre> 130<p> 131 Otherwise, for each match found, if 132 </p> 133<pre class="programlisting"><span class="special">!(</span><span class="identifier">flags</span> <span class="special">&</span> <span class="identifier">format_no_copy</span><span class="special">)</span> 134</pre> 135<p> 136 calls 137 </p> 138<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">copy</span><span class="special">(</span><span class="identifier">m</span><span class="special">.</span><span class="identifier">prefix</span><span class="special">().</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">m</span><span class="special">.</span><span class="identifier">prefix</span><span class="special">().</span><span class="identifier">last</span><span class="special">,</span> <span class="identifier">out</span><span class="special">),</span> 139</pre> 140<p> 141 and then calls 142 </p> 143<pre class="programlisting"><span class="identifier">m</span><span class="special">.</span><span class="identifier">format</span><span class="special">(</span><span class="identifier">out</span><span class="special">,</span> <span class="identifier">fmt</span><span class="special">,</span> <span class="identifier">flags</span><span class="special">).</span> 144</pre> 145<p> 146 Finally if 147 </p> 148<pre class="programlisting"><span class="special">!(</span><span class="identifier">flags</span> <span class="special">&</span> <span class="identifier">format_no_copy</span><span class="special">)</span> 149</pre> 150<p> 151 calls 152 </p> 153<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">copy</span><span class="special">(</span><span class="identifier">last_m</span><span class="special">.</span><span class="identifier">suffix</span><span class="special">().</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">last_m</span><span class="special">,</span><span class="identifier">suffix</span><span class="special">().</span><span class="identifier">last</span><span class="special">,</span> <span class="identifier">out</span><span class="special">)</span> 154</pre> 155<p> 156 where <span class="emphasis"><em>last_m</em></span> is a copy of the last match found. 157 </p> 158<p> 159 If <code class="computeroutput"><span class="identifier">flags</span> <span class="special">&</span> 160 <span class="identifier">format_first_only</span></code> is non-zero then 161 only the first match found is replaced. 162 </p> 163<p> 164 <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> 165 if the complexity of matching the expression against an N character string 166 begins to exceed O(N<sup>2</sup>), or if the program runs out of stack space while matching 167 the expression (if Boost.Regex is configured in recursive mode), or if the 168 matcher exhausts its permitted memory allocation (if Boost.Regex is configured 169 in non-recursive mode). 170 </p> 171<p> 172 <span class="bold"><strong>Returns</strong></span>: out. 173 </p> 174<pre class="programlisting"><span class="keyword">template</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">Formatter</span><span class="special">></span> 175<span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">></span> <span class="identifier">regex_replace</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">>&</span> <span class="identifier">s</span><span class="special">,</span> 176 <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> 177 <span class="identifier">Formatter</span> <span class="identifier">fmt</span><span class="special">,</span> 178 <span class="identifier">match_flag_type</span> <span class="identifier">flags</span> <span class="special">=</span> <span class="identifier">match_default</span><span class="special">);</span> 179</pre> 180<p> 181 <span class="bold"><strong>Requires</strong></span> The type <code class="computeroutput"><span class="identifier">Formatter</span></code> 182 must be either a pointer to a null-terminated string of type <code class="computeroutput"><span class="identifier">char_type</span><span class="special">[]</span></code>, 183 or be a container of <code class="computeroutput"><span class="identifier">char_type</span></code>'s 184 (for example <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">char_type</span><span class="special">></span></code>) 185 or be a unary, binary or ternary functor that computes the replacement string 186 from a function call: either <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">)</span></code> 187 which must return a container of <code class="computeroutput"><span class="identifier">char_type</span></code>'s 188 to be used as the replacement text, or either <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">,</span> 189 <span class="identifier">out</span><span class="special">)</span></code> 190 or <code class="computeroutput"><span class="identifier">fmt</span><span class="special">(</span><span class="identifier">what</span><span class="special">,</span> <span class="identifier">out</span><span class="special">,</span> <span class="identifier">flags</span><span class="special">)</span></code>, both of which write the replacement text 191 to <code class="computeroutput"><span class="special">*</span><span class="identifier">out</span></code>, 192 and then return the new OutputIterator position. In each case <code class="computeroutput"><span class="identifier">what</span></code> is the <a class="link" href="match_results.html" title="match_results"><code class="computeroutput"><span class="identifier">match_results</span></code></a> object that represents 193 the match found. 194 </p> 195<p> 196 <span class="bold"><strong>Effects</strong></span>: Constructs an object <code class="computeroutput"><span class="identifier">basic_string</span><span class="special"><</span><span class="identifier">charT</span><span class="special">></span> <span class="identifier">result</span></code>, calls <code class="computeroutput"><span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">back_inserter</span><span class="special">(</span><span class="identifier">result</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> 197 <span class="identifier">fmt</span><span class="special">,</span> 198 <span class="identifier">flags</span><span class="special">)</span></code>, 199 and then returns <code class="computeroutput"><span class="identifier">result</span></code>. 200 </p> 201<h5> 202<a name="boost_regex.ref.regex_replace.h1"></a> 203 <span class="phrase"><a name="boost_regex.ref.regex_replace.examples"></a></span><a class="link" href="regex_replace.html#boost_regex.ref.regex_replace.examples">Examples</a> 204 </h5> 205<p> 206 The following example takes C/C++ source code as input, and outputs syntax 207 highlighted HTML code. 208 </p> 209<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">fstream</span><span class="special">></span> 210<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">sstream</span><span class="special">></span> 211<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">string</span><span class="special">></span> 212<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iterator</span><span class="special">></span> 213<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> 214<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">fstream</span><span class="special">></span> 215<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 216 217<span class="comment">// purpose:</span> 218<span class="comment">// takes the contents of a file and transform to</span> 219<span class="comment">// syntax highlighted code in html format</span> 220 221<span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex</span> <span class="identifier">e1</span><span class="special">,</span> <span class="identifier">e2</span><span class="special">;</span> 222<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">expression_text</span><span class="special">;</span> 223<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">format_string</span><span class="special">;</span> 224<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">pre_expression</span><span class="special">;</span> 225<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">pre_format</span><span class="special">;</span> 226<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">header_text</span><span class="special">;</span> 227<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">footer_text</span><span class="special">;</span> 228 229<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> 230<span class="special">{</span> 231 <span class="identifier">s</span><span class="special">.</span><span class="identifier">erase</span><span class="special">();</span> 232 <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> 233 <span class="keyword">char</span> <span class="identifier">c</span><span class="special">;</span> 234 <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> 235 <span class="special">{</span> 236 <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> 237 <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> 238 <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> 239 <span class="special">}</span> 240<span class="special">}</span> 241 242<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">const</span> <span class="keyword">char</span><span class="special">**</span> <span class="identifier">argv</span><span class="special">)</span> 243<span class="special">{</span> 244 <span class="keyword">try</span><span class="special">{</span> 245 <span class="identifier">e1</span><span class="special">.</span><span class="identifier">assign</span><span class="special">(</span><span class="identifier">expression_text</span><span class="special">);</span> 246 <span class="identifier">e2</span><span class="special">.</span><span class="identifier">assign</span><span class="special">(</span><span class="identifier">pre_expression</span><span class="special">);</span> 247 <span class="keyword">for</span><span class="special">(</span><span class="keyword">int</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> 248 <span class="special">{</span> 249 <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Processing file "</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="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 250 <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">fs</span><span class="special">(</span><span class="identifier">argv</span><span class="special">[</span><span class="identifier">i</span><span class="special">]);</span> 251 <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">in</span><span class="special">;</span> 252 <span class="identifier">load_file</span><span class="special">(</span><span class="identifier">in</span><span class="special">,</span> <span class="identifier">fs</span><span class="special">);</span> 253 <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">out_name</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">argv</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">string</span><span class="special">(</span><span class="string">".htm"</span><span class="special">));</span> 254 <span class="identifier">std</span><span class="special">::</span><span class="identifier">ofstream</span> <span class="identifier">os</span><span class="special">(</span><span class="identifier">out_name</span><span class="special">.</span><span class="identifier">c_str</span><span class="special">());</span> 255 <span class="identifier">os</span> <span class="special"><<</span> <span class="identifier">header_text</span><span class="special">;</span> 256 <span class="comment">// strip '<' and '>' first by outputting to a</span> 257 <span class="comment">// temporary string stream</span> 258 <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostringstream</span> <span class="identifier">t</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ios</span><span class="special">::</span><span class="identifier">out</span> <span class="special">|</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">ios</span><span class="special">::</span><span class="identifier">binary</span><span class="special">);</span> 259 <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream_iterator</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="keyword">char</span><span class="special">></span> <span class="identifier">oi</span><span class="special">(</span><span class="identifier">t</span><span class="special">);</span> 260 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">oi</span><span class="special">,</span> <span class="identifier">in</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">in</span><span class="special">.</span><span class="identifier">end</span><span class="special">(),</span> 261 <span class="identifier">e2</span><span class="special">,</span> <span class="identifier">pre_format</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">match_default</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">format_all</span><span class="special">);</span> 262 <span class="comment">// then output to final output stream</span> 263 <span class="comment">// adding syntax highlighting:</span> 264 <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="identifier">t</span><span class="special">.</span><span class="identifier">str</span><span class="special">());</span> 265 <span class="identifier">std</span><span class="special">::</span><span class="identifier">ostream_iterator</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="keyword">char</span><span class="special">></span> <span class="identifier">out</span><span class="special">(</span><span class="identifier">os</span><span class="special">);</span> 266 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">regex_replace</span><span class="special">(</span><span class="identifier">out</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> 267 <span class="identifier">e1</span><span class="special">,</span> <span class="identifier">format_string</span><span class="special">,</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">match_default</span> <span class="special">|</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">format_all</span><span class="special">);</span> 268 <span class="identifier">os</span> <span class="special"><<</span> <span class="identifier">footer_text</span><span class="special">;</span> 269 <span class="special">}</span> 270 <span class="special">}</span> 271 <span class="keyword">catch</span><span class="special">(...)</span> 272 <span class="special">{</span> <span class="keyword">return</span> <span class="special">-</span><span class="number">1</span><span class="special">;</span> <span class="special">}</span> 273 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 274<span class="special">}</span> 275 276<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">pre_expression</span> <span class="special">=</span> <span class="string">"(<)|(>)|(&)|\\r"</span><span class="special">;</span> 277<span class="keyword">extern</span> <span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">pre_format</span> <span class="special">=</span> <span class="string">"(?1&lt;)(?2&gt;)(?3&amp;)"</span><span class="special">;</span> 278 279 280<span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">expression_text</span> <span class="special">=</span> 281 <span class="comment">// preprocessor directives: index 1</span> 282 <span class="string">"(^[[:blank:]]*#(?:[^\\\\\\n]|\\\\[^\\n[:punct:][:word:]]*[\\n[:punct:][:word:]])*)|"</span> 283 <span class="comment">// comment: index 2</span> 284 <span class="string">"(//[^\\n]*|/\\*.*?\\*/)|"</span> 285 <span class="comment">// literals: index 3</span> 286 <span class="string">"\\<([+-]?(?:(?:0x[[:xdigit:]]+)|(?:(?:[[:digit:]]*\\.)?[[:digit:]]+"</span> 287 <span class="string">"(?:[eE][+-]?[[:digit:]]+)?))u?(?:(?:int(?:8|16|32|64))|L)?)\\>|"</span> 288 <span class="comment">// string literals: index 4</span> 289 <span class="string">"('(?:[^\\\\']|\\\\.)*'|\"(?:[^\\\\\"]|\\\\.)*\")|"</span> 290 <span class="comment">// keywords: index 5</span> 291 <span class="string">"\\<(__asm|__cdecl|__declspec|__export|__far16|__fastcall|__fortran|__import"</span> 292 <span class="string">"|__pascal|__rtti|__stdcall|_asm|_cdecl|__except|_export|_far16|_fastcall"</span> 293 <span class="string">"|__finally|_fortran|_import|_pascal|_stdcall|__thread|__try|asm|auto|bool"</span> 294 <span class="string">"|break|case|catch|cdecl|char|class|const|const_cast|continue|default|delete"</span> 295 <span class="string">"|do|double|dynamic_cast|else|enum|explicit|extern|false|float|for|friend|goto"</span> 296 <span class="string">"|if|inline|int|long|mutable|namespace|new|operator|pascal|private|protected"</span> 297 <span class="string">"|public|register|reinterpret_cast|return|short|signed|sizeof|static|static_cast"</span> 298 <span class="string">"|struct|switch|template|this|throw|true|try|typedef|typeid|typename|union|unsigned"</span> 299 <span class="string">"|using|virtual|void|volatile|wchar_t|while)\\>"</span> 300 <span class="special">;</span> 301 302<span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">format_string</span> <span class="special">=</span> <span class="string">"(?1<font color=\"#008040\">$&</font>)"</span> 303 <span class="string">"(?2<I><font color=\"#000080\">$&</font></I>)"</span> 304 <span class="string">"(?3<font color=\"#0000A0\">$&</font>)"</span> 305 <span class="string">"(?4<font color=\"#0000FF\">$&</font>)"</span> 306 <span class="string">"(?5<B>$&</B>)"</span><span class="special">;</span> 307 308<span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">header_text</span> <span class="special">=</span> 309 <span class="string">"<HTML>\n<HEAD>\n"</span> 310 <span class="string">"<TITLE>Auto-generated html formatted source</TITLE>\n"</span> 311 <span class="string">"<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=windows-1252\">\n"</span> 312 <span class="string">"</HEAD>\n"</span> 313 <span class="string">"<BODY LINK=\"#0000ff\" VLINK=\"#800080\" BGCOLOR=\"#ffffff\">\n"</span> 314 <span class="string">"<P> </P>\n<PRE>"</span><span class="special">;</span> 315 316<span class="keyword">const</span> <span class="keyword">char</span><span class="special">*</span> <span class="identifier">footer_text</span> <span class="special">=</span> <span class="string">"</PRE>\n</BODY>\n\n"</span><span class="special">;</span> 317</pre> 318</div> 319<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 320<td align="left"></td> 321<td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p> 322 Distributed under the Boost Software License, Version 1.0. (See accompanying 323 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>) 324 </p> 325</div></td> 326</tr></table> 327<hr> 328<div class="spirit-nav"> 329<a accesskey="p" href="regex_search.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../ref.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="regex_iterator.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 330</div> 331</body> 332</html> 333
