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POParsing quoted string only works in some cases
 

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    <p>I've encountered something weird when trying to parse simple quoted strings. So I've written this simple parser that successfully parses quoted strings like <code>"string"</code> or <code>""</code>.</p> <pre><code>#include &lt;iostream&gt; #include "boost/spirit/include/qi.hpp" namespace qi = boost::spirit::qi; namespace iso8859 = boost::spirit::iso8859_1; int main( int argc, char* argv[] ) { using namespace qi; std::string input = "\"\""; std::string::const_iterator front = input.cbegin(); std::string::const_iterator end = input.cend(); bool parseSuccess = phrase_parse( front, end, '\"' &gt;&gt; *~char_('\"') &gt;&gt; '\"', iso8859::space ); if ( front != end ) { std::string trail( front, end ); std::cout &lt;&lt; "String parsing trail: " &lt;&lt; trail &lt;&lt; std::endl; } if ( !parseSuccess ) std::cout &lt;&lt; "Error parsing input string" &lt;&lt; std::endl; std::cout &lt;&lt; "Press enter to exit" &lt;&lt; std::endl; std::cin.get(); return 0; } </code></pre> <p>This all works perfectly fine, but when I extend the parsing rules to also parse things before the quoted string, it suddenly breaks..</p> <p>So, of example, this parses successfully:</p> <p><code>std::string input = "normalString 10.0 1.5 1.0 1.0 1.0 1.0"</code> With parsing rule:</p> <p><code>*char_ &gt;&gt; *double_</code></p> <p>And now if I combine this rule with the quoted string rule:</p> <p><code>std::string input = "normalString 10.0 1.5 1.0 1.0 1.0 1.0 \"quotedString\""</code></p> <p>With parsing rule:</p> <p><code>*char_ &gt;&gt; *double_ &gt;&gt; '\"' &gt;&gt; *~char_('\"') &gt;&gt; '\"'</code></p> <p>It suddenly doesn't work anymore and parsing fails. I have no idea why. Can anyone explain this?</p> <p>EDIT: Just in case it matters, I'm using Boost 1.53</p>
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