Commits on Mar 19, 2016

1. Kleene star can't into single-element sequence …

   This will fail to compile with error "'value_type': is not a member of 'ast::a3'".
   
   
   #include <boost/spirit/home/x3.hpp>
   #include <boost/spirit/home/x3/support/ast/variant.hpp>
   #include <boost/fusion/include/define_struct_inline.hpp>
   
   #include <string>
   #include <vector>
   
   namespace ast
   {
       BOOST_FUSION_DEFINE_STRUCT_INLINE
       (
           a1,
           (std::string, v)
       )
   
       BOOST_FUSION_DEFINE_STRUCT_INLINE
       (
           a2,
           (a1, v1)
           (std::vector<double>, v2)
       )
   
       BOOST_FUSION_DEFINE_STRUCT_INLINE
       (
           a3,
           (std::vector<a2>, v1)
       )
   }
   
   using namespace boost::spirit::x3;
   
   auto a1 = rule<class i1, ast::a1>{} = lexeme[+alpha];
   
   auto a2 = rule<class i2, ast::a2>{} = a1 >> '(' >> -(double_ % ',') >> ')';
   
   auto a3 = rule<class i3, ast::a3>{} = *(a2 >> ';');
   
   using data = ast::a3;
   
   int main()
   {
       std::string script = "foo(1,2,3);";
   
       auto begin = script.begin();
       auto   end = script.end();
   
       data v;
   
       bool ok = (boost::spirit::x3::phrase_parse(begin, end, a3, space, v) && begin == end);
   }
   
   
   Fixed by adding container_value specialization: for single-element fusion sequence return container_value of that one element.

   

   hia3 committed Mar 19, 2016
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